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app/src/main/java/com/meloda/fast/activity/DropUserDataActivity.kt

@@ -0,0 +1,23 @@
+package com.meloda.fast.activity
+
+import android.content.Intent
+import android.os.Bundle
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.base.BaseActivity
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+
+class DropUserDataActivity : BaseActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        UserConfig.clear()
+
+        TaskManager.execute { AppGlobal.database.clearAllTables() }
+
+        startActivity(Intent(this, MainActivity::class.java))
+        finishAffinity()
+    }
+
+}

app/src/main/java/com/meloda/fast/activity/LoginActivity.kt

@@ -0,0 +1,134 @@
+package com.meloda.fast.activity
+
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.graphics.Bitmap
+import android.os.Bundle
+import android.util.Log
+import android.view.MenuItem
+import android.webkit.*
+import android.widget.ProgressBar
+import androidx.core.view.isVisible
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import com.meloda.fast.R
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.api.VKAuth
+import com.meloda.fast.base.BaseActivity
+import com.meloda.fast.extensions.ContextExtensions.color
+import com.meloda.fast.extensions.ContextExtensions.drawable
+import com.meloda.fast.extensions.DrawableExtensions.tint
+import com.meloda.fast.widget.Toolbar
+
+class LoginActivity : BaseActivity() {
+
+    private lateinit var toolbar: Toolbar
+    private lateinit var progressBar: ProgressBar
+    private lateinit var webView: WebView
+    private lateinit var refreshLayout: SwipeRefreshLayout
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_login)
+
+        initViews()
+
+        prepareToolbar()
+        prepareRefreshLayout()
+
+        prepareSettings()
+
+        val url = VKAuth.getUrl(UserConfig.API_ID, VKAuth.settings)
+
+        webView.loadUrl(url)
+    }
+
+    private fun initViews() {
+        toolbar = findViewById(R.id.toolbar)
+        progressBar = findViewById(R.id.progressBar)
+        webView = findViewById(R.id.webView)
+        refreshLayout = findViewById(R.id.refreshLayout)
+    }
+
+    @SuppressLint("SetJavaScriptEnabled")
+    private fun prepareSettings() {
+        webView.settings.javaScriptEnabled = true
+        webView.clearCache(true)
+        webView.webViewClient = VKWebClient()
+
+        val cookieManager = CookieManager.getInstance()
+        cookieManager.setAcceptCookie(true)
+    }
+
+    private fun prepareToolbar() {
+        setSupportActionBar(toolbar)
+
+        toolbar.navigationIcon = drawable(R.drawable.ic_close).tint(color(R.color.accent))
+        toolbar.setNavigationClickListener { onBackPressed() }
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        if (item.itemId == android.R.id.home) onBackPressed()
+        return super.onOptionsItemSelected(item)
+    }
+
+    private fun prepareRefreshLayout() {
+        refreshLayout.apply {
+            setColorSchemeColors(color(R.color.accent))
+            setOnRefreshListener {
+                webView.reload()
+                isRefreshing = false
+            }
+        }
+    }
+
+    private inner class VKWebClient : WebViewClient() {
+        override fun shouldOverrideUrlLoading(view: WebView, url: String): Boolean {
+            view.loadUrl(url)
+            return true
+        }
+
+        override fun onPageStarted(view: WebView, url: String, favicon: Bitmap?) {
+            super.onPageStarted(view, url, favicon)
+
+            progressBar.isVisible = true
+            view.isVisible = false
+
+            parseUrl(url)
+        }
+
+        override fun onPageFinished(view: WebView, url: String) {
+            super.onPageFinished(view, url)
+
+            progressBar.isVisible = false
+            view.isVisible = true
+        }
+
+        override fun onReceivedError(
+            view: WebView,
+            request: WebResourceRequest?,
+            error: WebResourceError?
+        ) {
+            super.onReceivedError(view, request, error)
+            Log.e("VKM WebView", error.toString())
+        }
+    }
+
+    private fun parseUrl(url: String) {
+        try {
+            if (url.startsWith(VKAuth.redirectUrl) && !url.contains("error=")) {
+                val auth = VKAuth.parseRedirectUrl(url)
+                val token = auth[0]
+                val id = auth[1].toInt()
+
+                UserConfig.token = token
+                UserConfig.userId = id
+                UserConfig.save()
+
+                finishAffinity()
+                startActivity(Intent(this, MainActivity::class.java))
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+    }
+}

app/src/main/java/com/meloda/fast/activity/MainActivity.kt

@@ -0,0 +1,260 @@
+package com.meloda.fast.activity
+
+import android.content.Intent
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import androidx.core.view.GravityCompat
+import androidx.core.view.isVisible
+import androidx.drawerlayout.widget.DrawerLayout
+import com.google.android.material.bottomnavigation.BottomNavigationView
+import com.google.android.material.navigation.NavigationView
+import com.meloda.fast.R
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.api.VKApiKeys
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.base.BaseActivity
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.FragmentSwitcher
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.common.TimeManager
+import com.meloda.fast.dialog.AccountDialog
+import com.meloda.fast.extensions.ContextExtensions.color
+import com.meloda.fast.extensions.ContextExtensions.drawable
+import com.meloda.fast.extensions.DrawableExtensions.tint
+import com.meloda.fast.fragment.FragmentConversations
+import com.meloda.fast.fragment.FragmentFriends
+import com.meloda.fast.fragment.FragmentSettings
+import com.meloda.fast.fragment.LoginFragment
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.fast.service.LongPollService
+import com.meloda.fast.util.AndroidUtils
+import com.meloda.fast.util.ViewUtils
+import com.meloda.fast.widget.Toolbar
+
+
+class MainActivity : BaseActivity(),
+    NavigationView.OnNavigationItemSelectedListener,
+    BottomNavigationView.OnNavigationItemSelectedListener {
+
+    private lateinit var fragmentConversations: FragmentConversations
+    private lateinit var fragmentFriends: FragmentFriends
+    private lateinit var fragmentSettings: FragmentSettings
+
+    private var selectedId = 0
+
+    private lateinit var drawerLayout: DrawerLayout
+    lateinit var bottomBar: BottomNavigationView
+    private lateinit var navigationView: NavigationView
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        initViews()
+
+//        checkLogin()
+
+        if (UserConfig.isLoggedIn()) {
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.fragmentContainer, FragmentConversations())
+                .commit()
+        } else {
+            bottomBar.isVisible = false
+
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.fragmentContainer, LoginFragment())
+                .commit()
+        }
+
+
+//        TimeManager.init(this)
+
+//        prepareFragments()
+
+//        prepareNavigationView()
+//        prepareBottomBar()
+//        checkLogin()
+    }
+
+    private fun initViews() {
+        drawerLayout = findViewById(R.id.drawerLayout)
+        bottomBar = findViewById(R.id.bottomBar)
+        navigationView = findViewById(R.id.navigationView)
+    }
+
+    override fun onDestroy() {
+        TimeManager.destroy()
+        super.onDestroy()
+    }
+
+    private fun prepareFragments() {
+        fragmentConversations = FragmentConversations()
+        fragmentFriends = FragmentFriends(UserConfig.userId)
+        fragmentSettings = FragmentSettings()
+
+        val containerId = R.id.fragmentContainer
+
+        FragmentSwitcher.addFragments(
+            supportFragmentManager,
+            containerId,
+            listOf(fragmentConversations)
+        )
+    }
+
+    fun initToolbar(toolbar: Toolbar) {
+        toolbar.navigationIcon =
+            drawable(R.drawable.ic_search).tint(color(R.color.text_secondary_60_alpha))
+
+        toolbar.setTitleMode(Toolbar.TitleMode.HINT)
+        toolbar.setTitle(R.string.action_search)
+        toolbar.setAvatarClickListener { openAccountDialog() }
+    }
+
+    private fun openAccountDialog() {
+        AccountDialog().show(supportFragmentManager, AccountDialog.TAG)
+    }
+
+    private fun prepareNavigationView() {
+        navigationView.layoutParams?.width = AppGlobal.screenWidth - AppGlobal.screenWidth / 6
+
+        navigationView.setNavigationItemSelectedListener(this)
+
+        drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED)
+    }
+
+    private fun prepareBottomBar() {
+//        val menu = bottomBar.menu
+//
+//        val navigationFriends = menu.add(R.string.navigation_friends)
+//        navigationFriends.icon = drawable(R.drawable.ic_people_outline)
+//
+//        val navigationConversations = menu.add(R.string.navigation_conversations)
+//        navigationConversations.icon = drawable(R.drawable.ic_message_outline)
+//
+//        val navigationImportant = menu.add(R.string.navigation_important)
+//        navigationImportant.icon = drawable(R.drawable.ic_star_border)
+
+        bottomBar.setOnNavigationItemSelectedListener(this)
+    }
+
+    private fun createMenuItem(menu: Menu, tag: String): MenuItem {
+        return when (tag) {
+            "friends" ->
+                menu.add("Friends").apply { icon = drawable(R.drawable.ic_people_outline) }
+            "conversations" ->
+                menu.add("Conversations").apply { icon = drawable(R.drawable.ic_message_outline) }
+            "important" ->
+                menu.add("Important").apply { icon = drawable(R.drawable.ic_star_border) }
+
+            else -> menu.add("")
+        }
+    }
+
+    private fun checkLogin() {
+        if (UserConfig.isLoggedIn()) {
+            startLongPoll()
+            loadProfileInfo()
+        } else {
+            openStartScreen()
+        }
+    }
+
+    private fun openMainScreen() {
+        selectedId = R.id.navigationConversations
+        bottomBar.selectedItemId = selectedId
+        openConversationsScreen()
+    }
+
+    private fun startLongPoll() {
+        startService(Intent(this, LongPollService::class.java))
+    }
+
+    private fun openStartScreen() {
+        finish()
+        startActivity(Intent(this, StartActivity::class.java))
+    }
+
+    private fun openConversationsScreen() {
+        FragmentSwitcher.showFragment(
+            supportFragmentManager,
+            fragmentConversations.javaClass.simpleName,
+            true
+        )
+    }
+
+    private fun openFriendsScreen() {
+        FragmentSwitcher.showFragment(
+            supportFragmentManager,
+            fragmentFriends.javaClass.simpleName,
+            true
+        )
+    }
+
+    private fun openSettingsScreen() {
+        startActivity(Intent(this, SettingsActivity::class.java))
+    }
+
+    private fun loadProfileInfo() {
+        if (AndroidUtils.hasConnection()) {
+            TaskManager.loadUser(VKApiKeys.UPDATE_USER, UserConfig.userId,
+                object : OnResponseListener<VKUser> {
+                    override fun onResponse(response: VKUser) {
+                        prepareNavigationHeader(response)
+                        openMainScreen()
+                    }
+
+                    override fun onError(t: Throwable) {
+                        openMainScreen()
+                    }
+                })
+        }
+    }
+
+    private fun prepareNavigationHeader(user: VKUser) {
+        ViewUtils.prepareNavigationHeader(navigationView.getHeaderView(0), user)
+    }
+
+    override fun onNavigationItemSelected(item: MenuItem): Boolean {
+        switchFragment(item.itemId)
+        return true
+    }
+
+    private fun switchFragment(itemId: Int) {
+        var valid = true
+
+        when (itemId) {
+            R.id.navigationConversations -> {
+                openConversationsScreen()
+            }
+            R.id.navigationFriends -> {
+                openFriendsScreen()
+            }
+            R.id.navigationSettings -> {
+                openSettingsScreen()
+            }
+            else -> {
+                valid = false
+            }
+        }
+
+        if (!valid) return
+
+        if (selectedId != itemId) {
+            selectedId = itemId
+            navigationView.setCheckedItem(selectedId)
+        }
+
+        if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
+            drawerLayout.closeDrawer(GravityCompat.START)
+        }
+    }
+
+    override fun onBackPressed() {
+        if (drawerLayout.isDrawerOpen(navigationView)) {
+            drawerLayout.closeDrawer(navigationView)
+        } else {
+            super.onBackPressed()
+        }
+    }
+}

app/src/main/java/com/meloda/fast/activity/MessagesActivity.kt

@@ -0,0 +1,403 @@
+package com.meloda.fast.activity
+
+import android.content.res.ColorStateList
+import android.graphics.Color
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import android.widget.*
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.widget.Toolbar
+import androidx.core.view.isVisible
+import androidx.core.widget.addTextChangedListener
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import com.amulyakhare.textdrawable.TextDrawable
+import com.meloda.fast.R
+import com.meloda.fast.activity.ui.presenter.MessagesPresenter
+import com.meloda.fast.activity.ui.view.MessagesView
+import com.meloda.fast.api.model.VKConversation
+import com.meloda.fast.api.model.VKGroup
+import com.meloda.fast.api.model.VKModel
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.base.BaseActivity
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.dialog.ProfileDialog
+import com.meloda.fast.extensions.ContextExtensions.color
+import com.meloda.fast.extensions.DrawableExtensions.tint
+import com.meloda.fast.extensions.ImageViewExtensions.loadImage
+import com.meloda.fast.fragment.FragmentSettings
+import com.meloda.fast.util.KeyboardUtils
+import com.meloda.fast.util.TextUtils
+import com.meloda.fast.util.ViewUtils
+import com.meloda.fast.widget.CircleImageView
+
+
+class MessagesActivity : BaseActivity(), MessagesView {
+
+    companion object {
+        const val TAG = "MessagesActivity"
+
+        const val MESSAGES_COUNT = 30
+
+        const val TAG_EXTRA_TITLE = "title"
+        const val TAG_EXTRA_AVATAR = "avatar"
+        const val TAG_EXTRA_ID = "id"
+        const val TAG_EXTRA_USER = "user"
+        const val TAG_EXTRA_GROUP = "group"
+    }
+
+    private var isEdit = false
+
+    private var fabState = FabState.VOICE
+
+    private enum class FabState {
+        VOICE, SEND, EDIT, DELETE, BLOCKED
+    }
+
+    private var title = ""
+    private var avatar = ""
+
+    private var lastMessageText = ""
+    private var attachments = arrayListOf<VKModel>()
+
+    private var peerId = 0
+
+    private var dialogUser: VKUser? = null
+    private var dialogGroup: VKGroup? = null
+
+    private lateinit var presenter: MessagesPresenter
+
+    lateinit var recyclerView: RecyclerView
+    private lateinit var refreshLayout: SwipeRefreshLayout
+    private lateinit var toolbar: Toolbar
+    private lateinit var chatAvatar: CircleImageView
+    private lateinit var chatTitle: TextView
+    private lateinit var chatInfo: TextView
+    private lateinit var chatPanel: LinearLayout
+    private lateinit var chatMessage: EditText
+    private lateinit var chatSend: ImageButton
+    private lateinit var progressBar: ProgressBar
+
+    private lateinit var noItemsView: LinearLayout
+    private lateinit var noInternetView: LinearLayout
+    private lateinit var errorView: LinearLayout
+
+    override fun onDestroy() {
+        super.onDestroy()
+        presenter.destroy()
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_messages)
+        initViews()
+
+        initExtraData()
+
+        prepareToolbar()
+        prepareRefreshLayout()
+        prepareRecyclerView()
+        prepareEditText()
+
+        presenter = MessagesPresenter(this)
+        presenter.setup(peerId, recyclerView)
+    }
+
+    private fun initViews() {
+        toolbar = findViewById(R.id.toolbar)
+        recyclerView = findViewById(R.id.recyclerView)
+        refreshLayout = findViewById(R.id.refreshLayout)
+        chatAvatar = findViewById(R.id.chatAvatar)
+        chatTitle = findViewById(R.id.chatTitle)
+        chatInfo = findViewById(R.id.chatInfo)
+        chatPanel = findViewById(R.id.chatPanel)
+        chatMessage = findViewById(R.id.chatMessage)
+        chatSend = findViewById(R.id.chatSend)
+        progressBar = findViewById(R.id.progressBar)
+
+        noItemsView = findViewById(R.id.noItemsView)
+        noInternetView = findViewById(R.id.noInternetView)
+        errorView = findViewById(R.id.errorView)
+    }
+
+    private fun initExtraData() {
+        peerId = intent.getIntExtra(TAG_EXTRA_ID, -1)
+        title = intent.getStringExtra(TAG_EXTRA_TITLE) ?: ""
+        avatar = intent.getStringExtra(TAG_EXTRA_AVATAR) ?: ""
+
+        dialogUser = intent.getSerializableExtra(TAG_EXTRA_USER) as VKUser?
+        dialogGroup = intent.getSerializableExtra(TAG_EXTRA_GROUP) as VKGroup?
+    }
+
+    private fun prepareToolbar() {
+        setSupportActionBar(toolbar)
+
+        val placeholder = TextDrawable
+            .builder()
+            .buildRound(TextUtils.getFirstLetterFromString(title), color(R.color.accent))
+
+        chatAvatar.setImageDrawable(placeholder)
+
+        chatAvatar.loadImage(avatar, placeholder)
+
+        toolbar.setOnClickListener { presenter.openProfile() }
+
+        chatAvatar.setOnClickListener { presenter.openProfile() }
+
+        chatTitle.text = title
+
+        supportActionBar?.setDisplayShowTitleEnabled(false)
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+
+        toolbar.navigationIcon.tint(color(R.color.accent))
+    }
+
+    private fun prepareRefreshLayout() {
+        refreshLayout.isEnabled = false
+    }
+
+    private fun prepareRecyclerView() {
+        recyclerView.layoutManager =
+            LinearLayoutManager(this, RecyclerView.VERTICAL, false).also {
+                it.stackFromEnd = true
+            }
+
+        recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+            override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
+                super.onScrolled(recyclerView, dx, dy)
+
+                if (dy < 0 && AppGlobal.inputMethodManager.isAcceptingText && AppGlobal.preferences.getBoolean(
+                        FragmentSettings.KEY_HIDE_KEYBOARD_ON_SCROLL_UP,
+                        true
+                    )
+                ) {
+                    KeyboardUtils.hideKeyboardFrom(chatMessage)
+                }
+            }
+        })
+    }
+
+    private fun prepareEditText() {
+        chatMessage.addTextChangedListener {
+            fabState = if (it.toString().trim().isEmpty()) {
+                if (isEdit) {
+                    FabState.DELETE
+                } else {
+                    FabState.VOICE
+                }
+            } else {
+                if (isEdit) {
+                    FabState.EDIT
+                } else {
+                    FabState.SEND
+                }
+            }
+
+            refreshFabStyle()
+        }
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+        menuInflater.inflate(R.menu.activity_messages, menu)
+        return super.onCreateOptionsMenu(menu)
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        when (item.itemId) {
+            android.R.id.home -> onBackPressed()
+
+            R.id.messagesRefresh -> {
+                presenter.updateData()
+            }
+        }
+
+        return super.onOptionsItemSelected(item)
+    }
+
+    private fun refreshFabStyle() {
+        chatSend.isClickable = true
+
+        when (fabState) {
+            FabState.VOICE -> {
+                chatSend.apply {
+                    setImageResource(R.drawable.ic_mic)
+
+                    setOnClickListener {
+                        showVoiceRecordingTip()
+                    }
+                    setOnLongClickListener {
+                        true
+                    }
+                }
+            }
+            FabState.SEND -> {
+                chatSend.apply {
+                    setImageResource(R.drawable.ic_send)
+
+                    setOnClickListener {
+                        presenter.sendMessage(chatMessage.text.toString(), attachments)
+                    }
+
+                    setOnLongClickListener {
+                        presenter.sendMessage(chatMessage.text.toString(), attachments, false)
+                        true
+                    }
+                }
+            }
+            FabState.EDIT -> {
+                chatSend.apply {
+                    setImageResource(R.drawable.ic_done)
+
+                    setOnClickListener {
+                        //editMessage()
+                    }
+
+                    setOnLongClickListener {
+                        performClick()
+                        true
+                    }
+                }
+
+            }
+            FabState.DELETE -> {
+                chatSend.apply {
+                    setImageResource(R.drawable.ic_trash_outline)
+
+                    chatSend.setOnClickListener {
+                        //deleteMessage
+                    }
+
+                    chatSend.setOnLongClickListener {
+                        performClick()
+                        true
+                    }
+                }
+            }
+            FabState.BLOCKED -> {
+                chatSend.apply {
+                    isClickable = false
+                    setImageResource(R.drawable.ic_lock)
+                }
+            }
+        }
+    }
+
+    override fun showChatPanel() {
+        chatPanel.isVisible = true
+    }
+
+    override fun hideChatPanel() {
+        chatPanel.isVisible = false
+    }
+
+    override fun setWritingAllowed(allowed: Boolean) {
+        if (allowed) {
+            fabState = FabState.VOICE
+
+            chatSend.imageTintList = ColorStateList.valueOf(color(R.color.accent))
+
+            chatMessage.isEnabled = true
+
+            chatPanel.setBackgroundResource(R.drawable.chat_panel_background)
+        } else {
+            fabState = FabState.BLOCKED
+
+            chatSend.imageTintList = ColorStateList.valueOf(Color.WHITE)
+
+            chatMessage.isEnabled = false
+            chatMessage.setHintTextColor(Color.WHITE)
+            chatMessage.setHint(R.string.no_access)
+
+            chatPanel.setBackgroundResource(R.drawable.chat_panel_background_blocked)
+        }
+    }
+
+    override fun setChatInfo(info: String) {
+        chatInfo.text = info
+        chatInfo.isVisible = info.isNotEmpty()
+    }
+
+    override fun openProfile(conversation: VKConversation) {
+        conversation.let {
+            val profileDialog = ProfileDialog(it, title)
+            profileDialog.show(supportFragmentManager, ProfileDialog.TAG)
+        }
+    }
+
+    override fun showErrorLoadConversationAlert() {
+        val builder = AlertDialog.Builder(this)
+        builder.setTitle(R.string.error_occurred)
+        builder.setMessage(R.string.error_loading_message)
+        builder.setPositiveButton(R.string.retry) { _, _ ->
+            presenter.loadConversation(peerId)
+        }
+        builder.setNegativeButton(R.string.no) { _, _ -> onBackPressed() }
+        builder.setCancelable(false)
+        builder.show()
+    }
+
+    override fun showVoiceRecordingTip() {
+        Toast.makeText(this, R.string.voice_record_tip, Toast.LENGTH_LONG).show()
+    }
+
+    override fun setMessageText(text: String) {
+        chatMessage.setText(text)
+    }
+
+    override fun showErrorSnackbar(t: Throwable) {
+        ViewUtils.showErrorSnackbar(getRootView(), t)
+    }
+
+    override fun prepareNoItemsView() {
+    }
+
+    override fun showNoItemsView() {
+        noItemsView.isVisible = true
+    }
+
+    override fun hideNoItemsView() {
+        noItemsView.isVisible = false
+    }
+
+    override fun prepareNoInternetView() {
+    }
+
+    override fun showNoInternetView() {
+        noInternetView.isVisible = true
+    }
+
+    override fun hideNoInternetView() {
+        noInternetView.isVisible = false
+    }
+
+    override fun prepareErrorView() {
+    }
+
+    override fun showErrorView() {
+        errorView.isVisible = true
+    }
+
+    override fun hideErrorView() {
+        errorView.isVisible = false
+    }
+
+    override fun showProgressBar() {
+        progressBar.isVisible = true
+    }
+
+    override fun hideProgressBar() {
+        progressBar.isVisible = false
+    }
+
+    override fun showRefreshLayout() {
+        refreshLayout.isRefreshing = true
+    }
+
+    override fun hideRefreshLayout() {
+        refreshLayout.isRefreshing = false
+    }
+
+
+}

app/src/main/java/com/meloda/fast/activity/SettingsActivity.kt

@@ -0,0 +1,44 @@
+package com.meloda.fast.activity
+
+import android.os.Bundle
+import com.meloda.fast.R
+import com.meloda.fast.base.BaseActivity
+import com.meloda.fast.common.FragmentSwitcher
+import com.meloda.fast.extensions.ContextExtensions.color
+import com.meloda.fast.extensions.ContextExtensions.drawable
+import com.meloda.fast.extensions.DrawableExtensions.tint
+import com.meloda.fast.fragment.FragmentSettings
+import com.meloda.fast.widget.Toolbar
+
+class SettingsActivity : BaseActivity() {
+
+    private lateinit var toolbar: Toolbar
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_settings)
+        initViews()
+
+        setSupportActionBar(toolbar)
+
+        toolbar.navigationIcon = drawable(R.drawable.ic_arrow_back).tint(color(R.color.accent))
+
+        toolbar.setNavigationClickListener { onBackPressed() }
+
+        supportFragmentManager.beginTransaction()
+            .replace(R.id.fragmentContainer, FragmentSettings()).commitNow()
+    }
+
+    private fun initViews() {
+        toolbar = findViewById(R.id.toolbar)
+    }
+
+    override fun onBackPressed() {
+        val currentFragment = FragmentSwitcher.getCurrentFragment(supportFragmentManager) ?: return
+
+        if (currentFragment.javaClass == FragmentSettings::class.java && (currentFragment as FragmentSettings).onBackPressed()) {
+            super.onBackPressed()
+        }
+    }
+
+}

app/src/main/java/com/meloda/fast/activity/StartActivity.kt

@@ -0,0 +1,82 @@
+package com.meloda.fast.activity
+
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.widget.Toast
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.widget.AppCompatEditText
+import com.google.android.material.button.MaterialButton
+import com.meloda.fast.R
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.base.BaseActivity
+
+@SuppressLint("InflateParams")
+class StartActivity : BaseActivity() {
+
+    private lateinit var startEnter: MaterialButton
+    private lateinit var startLoginSettings: MaterialButton
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_start)
+        initViews()
+
+        prepareEnterButton()
+    }
+
+    private fun initViews() {
+        startEnter = findViewById(R.id.startEnter)
+        startLoginSettings = findViewById(R.id.startLoginSettings)
+    }
+
+    private fun prepareEnterButton() {
+        startEnter.setOnClickListener {
+            startActivity(Intent(this, LoginActivity::class.java))
+        }
+
+        startEnter.setOnLongClickListener {
+            showUserIdTokenDialog()
+            true
+        }
+
+        startLoginSettings.setOnClickListener {
+            Toast.makeText(this, R.string.in_progress_placeholder, Toast.LENGTH_LONG).show()
+        }
+    }
+
+    private fun showUserIdTokenDialog() {
+        AlertDialog.Builder(this).apply {
+            setTitle(R.string.custom_data)
+
+            val view = LayoutInflater.from(this@StartActivity)
+                .inflate(R.layout.activity_login_custom_data, null, false) as View
+            setView(view)
+
+            val userId = view.findViewById<AppCompatEditText>(R.id.customDataUserId)
+            val token = view.findViewById<AppCompatEditText>(R.id.customDataToken)
+
+            setPositiveButton(android.R.string.ok) { _, _ ->
+                if (userId.text.toString().isEmpty() || token.text.toString().isEmpty())
+                    return@setPositiveButton
+                val id = userId.text.toString().toInt()
+                val accessToken = token.text.toString()
+
+                if (id < 1) return@setPositiveButton
+
+                UserConfig.userId = id
+                UserConfig.token = accessToken
+                UserConfig.save()
+
+                finish()
+                startActivity(Intent(this@StartActivity, MainActivity::class.java))
+            }
+
+            setCancelable(false)
+            setNegativeButton(android.R.string.cancel, null)
+        }.show()
+    }
+
+}

app/src/main/java/com/meloda/fast/activity/UpdateActivity.kt

@@ -0,0 +1,350 @@
+package com.meloda.fast.activity
+
+import android.app.Activity
+import android.app.DownloadManager
+import android.content.Intent
+import android.content.IntentFilter
+import android.net.Uri
+import android.os.Build
+import android.os.Bundle
+import android.os.Environment
+import android.util.Log
+import android.view.View
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.appcompat.app.AlertDialog
+import androidx.core.content.FileProvider
+import androidx.core.text.HtmlCompat
+import androidx.core.view.isVisible
+import com.github.rahatarmanahmed.cpv.CircularProgressView
+import com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.R
+import com.meloda.fast.base.BaseActivity
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.common.UpdateManager
+import com.meloda.fast.extensions.ContextExtensions.drawable
+import com.meloda.fast.extensions.FloatExtensions.int
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.fast.model.NewUpdateInfo
+import com.meloda.fast.receiver.DownloadUpdateReceiver
+import com.meloda.fast.util.AndroidUtils
+import com.meloda.fast.util.TimeUtils
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.*
+
+
+class UpdateActivity : BaseActivity() {
+
+    companion object {
+        private const val FILE_BASE_PATH = "file://"
+        private const val MIME_TYPE = "application/vnd.android.package-archive"
+        private const val PROVIDER_PATH = ".provider"
+    }
+
+    private var isChecking = false
+    private var isNewUpdate = false
+    private var isDownloading = false
+
+    private var downloadId = 0L
+
+    private var lastCheckTime = 0L
+
+    private var newUpdate = NewUpdateInfo()
+
+    private lateinit var updateCheckUpdates: ExtendedFloatingActionButton
+    private lateinit var updateState: TextView
+    private lateinit var updateVersion: TextView
+    private lateinit var updateInfo: TextView
+    private lateinit var updateInfoLayout: LinearLayout
+    private lateinit var updateProgress: LinearLayout
+    private lateinit var updateProgressBar: CircularProgressView
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_update)
+        initViews()
+
+        updateProgressBar.maxProgress = 100F
+
+        lastCheckTime = AppGlobal.preferences.getLong("updateCheckTime", 0)
+
+        refreshState()
+
+        checkUpdates()
+
+        updateCheckUpdates.setOnClickListener {
+            lastCheckTime = System.currentTimeMillis()
+            AppGlobal.preferences.edit().putLong("updateCheckTime", lastCheckTime).apply()
+
+            checkUpdates()
+        }
+    }
+
+    private fun initViews() {
+        updateCheckUpdates = findViewById(R.id.updateCheckUpdates)
+        updateInfo = findViewById(R.id.updateInfo)
+        updateVersion = findViewById(R.id.updateVersion)
+        updateState = findViewById(R.id.updateState)
+        updateInfoLayout = findViewById(R.id.updateInfoLayout)
+        updateProgress = findViewById(R.id.updateProgress)
+        updateProgressBar = updateProgress.getChildAt(0) as CircularProgressView
+    }
+
+    private fun installUpdate(context: Activity, file: File) {
+        val install = Intent(Intent.ACTION_VIEW)
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+            install.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            install.putExtra(Intent.EXTRA_NOT_UNKNOWN_SOURCE, true)
+            install.data = FileProvider.getUriForFile(
+                this,
+                BuildConfig.APPLICATION_ID + PROVIDER_PATH,
+                file
+            )
+        } else {
+            install.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP
+            install.setDataAndType(Uri.fromFile(file), MIME_TYPE)
+        }
+
+        context.startActivity(install)
+//        context.finishAffinity()
+    }
+
+    private fun downloadUpdate() {
+        checkIsInstallingAllowed()
+
+        val timer = Timer()
+
+        updateCheckUpdates.shrink()
+        updateCheckUpdates.isClickable = false
+
+        isDownloading = true
+        refreshState()
+
+        TaskManager.execute {
+            val apkName = newUpdate.version
+
+            val destination =
+                getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).toString() + "/$apkName.apk"
+
+            val uri = Uri.parse("$FILE_BASE_PATH$destination")
+
+            val file = File(destination)
+            if (file.exists()) file.delete()
+
+            val request = DownloadManager.Request(Uri.parse(newUpdate.downloadLink))
+
+            request.setTitle("${getString(R.string.app_name)} ${apkName}.apk")
+            request.setMimeType(MIME_TYPE)
+            request.setDestinationUri(uri)
+            request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI or DownloadManager.Request.NETWORK_MOBILE)
+            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE)
+
+            val receiver = DownloadUpdateReceiver()
+            receiver.listener = object : OnResponseListener<Any?> {
+                override fun onResponse(response: Any?) {
+                    timer.cancel()
+
+                    installUpdate(this@UpdateActivity, file)
+
+                    unregisterReceiver(receiver)
+
+                    runOnUiThread {
+                        updateProgressBar.isIndeterminate = true
+
+                        updateCheckUpdates.extend()
+                        updateCheckUpdates.isClickable = true
+
+                        isDownloading = false
+                        refreshState()
+                    }
+                }
+
+                override fun onError(t: Throwable) {
+                }
+            }
+
+            registerReceiver(receiver, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE))
+
+            downloadId = AppGlobal.downloadManager.enqueue(request)
+
+            timer.schedule(object : TimerTask() {
+                override fun run() {
+                    val query = DownloadManager.Query()
+                    query.setFilterById(downloadId)
+
+                    val cursor = AppGlobal.downloadManager.query(query)
+                    if (cursor.moveToFirst()) {
+                        val sizeIndex =
+                            cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES)
+                        val downloadedIndex =
+                            cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR)
+                        val size = cursor.getInt(sizeIndex)
+                        val downloaded = cursor.getInt(downloadedIndex)
+
+                        val progress = if (size != -1) (downloaded * 100.0F / size) else 0.0F
+
+                        Log.d("Downloading update", "progress $progress%")
+
+                        if (progress.int() > 0) {
+                            runOnUiThread {
+                                if (updateProgressBar.isIndeterminate) {
+                                    updateProgressBar.isIndeterminate = false
+                                    updateProgressBar.stopAnimation()
+                                }
+
+                                updateProgressBar.progress = progress
+                            }
+                        }
+                    }
+                }
+
+            }, 0, 1000)
+        }
+    }
+
+    private fun checkUpdates() {
+        if (isChecking) return
+
+        isChecking = true
+        refreshState()
+
+        UpdateManager.checkUpdates(object : UpdateManager.OnUpdateListener {
+            override fun onNewUpdate(updateInfo: NewUpdateInfo) {
+                isChecking = false
+                isNewUpdate = true
+
+                this@UpdateActivity.newUpdate = updateInfo
+
+                refreshState()
+            }
+
+            override fun onNoUpdates() {
+                isNewUpdate = false
+                isChecking = false
+
+                this@UpdateActivity.newUpdate = NewUpdateInfo()
+
+                refreshState()
+            }
+        })
+    }
+
+    private fun checkIsInstallingAllowed() {
+        if (!AndroidUtils.isCanInstallUnknownApps(this)) {
+            val builder = AlertDialog.Builder(this)
+            builder.setTitle(R.string.warning)
+            builder.setMessage(R.string.update_unknown_sources_disabled_message)
+            builder.setPositiveButton(R.string.yes) { _, _ ->
+                AndroidUtils.openInstallUnknownAppsScreen(this)
+            }
+            builder.setNegativeButton(R.string.no, null)
+            builder.show()
+        }
+    }
+
+    private fun refreshState() {
+        when {
+            isChecking -> {
+                updateState.text = getString(R.string.update_state_checking)
+
+                setAlpha(updateInfoLayout, true)
+                setAlpha(updateProgress, false)
+                setAlpha(updateCheckUpdates, true)
+            }
+            isDownloading -> {
+                updateState.text = getString(R.string.update_state_downloading)
+
+                setAlpha(updateInfoLayout, true)
+                setAlpha(updateProgress, false)
+                setAlpha(updateCheckUpdates, true)
+            }
+            else -> {
+                if (isNewUpdate) {
+                    updateCheckUpdates.text = getString(R.string.update_download)
+                    updateCheckUpdates.icon = drawable(R.drawable.ic_file_download)
+                } else {
+                    updateCheckUpdates.text = getString(R.string.update_check_updates)
+                    updateCheckUpdates.icon = drawable(R.drawable.ic_refresh)
+                }
+
+                updateCheckUpdates.setOnClickListener {
+                    if (isNewUpdate) {
+                        downloadUpdate()
+                    } else {
+                        checkUpdates()
+                    }
+                }
+
+                updateState.text =
+                    getString(if (isNewUpdate) R.string.update_state_update_available else R.string.update_state_no_updates)
+
+                updateVersion.text =
+                    if (isNewUpdate)
+                        getString(
+                            R.string.update_new_version,
+                            newUpdate.version,
+                            newUpdate.code
+                        )
+                    else getString(
+                        R.string.update_current_version,
+                        AppGlobal.versionName,
+                        AppGlobal.versionCode
+                    )
+
+                updateInfo.text =
+                    when {
+                        isNewUpdate -> if (newUpdate.changelog.isEmpty()) "" else getString(
+                            R.string.update_changelog,
+                            HtmlCompat.fromHtml(
+                                newUpdate.changelog,
+                                HtmlCompat.FROM_HTML_MODE_LEGACY
+                            )
+                        )
+                        lastCheckTime.toString().isEmpty() || lastCheckTime == 0L -> ""
+                        else -> getString(R.string.update_last_check_time, getCheckTime())
+                    }
+
+                setAlpha(updateInfoLayout, false)
+                setAlpha(updateProgress, true)
+                setAlpha(updateCheckUpdates, false)
+            }
+        }
+    }
+
+    private fun getCheckTime(): String {
+        val time = lastCheckTime
+
+        val lastTime = TimeUtils.removeTime(Date(time))
+        val currentTime = TimeUtils.removeTime(Date(System.currentTimeMillis()))
+
+        val format = if (currentTime > lastTime) {
+            "dd.MM.yyyy HH:mm"
+        } else {
+            "HH:mm"
+        }
+
+        return SimpleDateFormat(format, Locale.getDefault()).format(time)
+    }
+
+    private fun setAlpha(view: View, toZero: Boolean) {
+        if (toZero) {
+            view.animate()
+                .alpha(0F)
+                .setDuration(250)
+                .withEndAction { view.isVisible = false }
+                .start()
+        } else {
+            view.animate()
+                .alpha(1F)
+                .setDuration(250)
+                .withStartAction { view.isVisible = true }
+                .start()
+        }
+    }
+
+}

app/src/main/java/com/meloda/fast/activity/ui/presenter/MessagesPresenter.kt

@@ -0,0 +1,256 @@
+package com.meloda.fast.activity.ui.presenter
+
+import androidx.recyclerview.widget.RecyclerView
+import com.meloda.fast.R
+import com.meloda.fast.activity.ui.repository.MessagesRepository
+import com.meloda.fast.activity.ui.view.MessagesView
+import com.meloda.fast.adapter.MessagesAdapter
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.api.VKApiKeys
+import com.meloda.fast.api.model.VKConversation
+import com.meloda.fast.api.model.VKMessage
+import com.meloda.fast.api.model.VKModel
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.event.EventInfo
+import com.meloda.fast.listener.ItemClickListener
+import com.meloda.fast.listener.ItemLongClickListener
+import com.meloda.mvp.MvpOnLoadListener
+import com.meloda.mvp.MvpPresenter
+import kotlin.random.Random
+
+class MessagesPresenter(viewState: MessagesView) :
+    MvpPresenter<VKMessage, MessagesRepository, MessagesView>(
+        viewState,
+        MessagesRepository::class.java.name
+    ),
+    ItemClickListener,
+    ItemLongClickListener,
+    TaskManager.OnEventListener {
+
+    companion object {
+        const val DEFAULT_MESSAGES_COUNT = 30
+    }
+
+    private lateinit var adapter: MessagesAdapter
+    private lateinit var conversation: VKConversation
+
+    private var peerId: Int = -1
+
+    private var lastMessageText: String = ""
+
+    private lateinit var recyclerView: RecyclerView
+
+    override fun destroy() {
+        adapter.destroy()
+    }
+
+    fun setup(peerId: Int, recyclerView: RecyclerView) {
+        this.peerId = peerId
+        this.recyclerView = recyclerView
+        this.context = recyclerView.context
+
+        viewState.showProgressBar()
+        getCachedConversation(peerId)
+    }
+
+    fun updateData() {
+        adapter.clear()
+        loadMessages(peerId)
+    }
+
+    fun openProfile() {
+        viewState.openProfile(conversation)
+    }
+
+    private fun createAdapter() {
+        adapter = MessagesAdapter(context!!, arrayListOf(), conversation).also {
+            it.itemClickListener = this
+            it.itemLongClickListener = this
+        }
+
+        recyclerView.adapter = adapter
+    }
+
+    private fun getCachedConversation(peerId: Int) {
+        repository.getCachedConversation(peerId, object : MvpOnLoadListener<VKConversation> {
+            override fun onResponse(response: VKConversation) {
+                conversation = response
+
+                createAdapter()
+                refreshConversation(response)
+
+                getCachedMessages(peerId, 0, DEFAULT_MESSAGES_COUNT,
+                    object : MvpOnLoadListener<Any?> {
+                        override fun onResponse(response: Any?) {
+                            loadConversation(peerId)
+                            loadMessages(peerId)
+                        }
+
+                        override fun onError(t: Throwable) {
+                            loadConversation(peerId)
+                            loadMessages(peerId)
+                        }
+                    })
+            }
+
+            override fun onError(t: Throwable) {
+                loadConversation(peerId)
+                loadMessages(peerId)
+            }
+        })
+    }
+
+    fun loadConversation(peerId: Int) {
+        if (adapter.isNotEmpty()) {
+            viewState.hideProgressBar()
+        }
+
+        repository.loadConversation(peerId, object : MvpOnLoadListener<VKConversation> {
+
+            override fun onResponse(response: VKConversation) {
+                conversation = response
+
+                createAdapter()
+                refreshConversation(response)
+            }
+
+            override fun onError(t: Throwable) {
+                viewState.hideProgressBar()
+                viewState.showErrorLoadConversationAlert()
+            }
+
+        })
+    }
+
+    private fun refreshConversation(conversation: VKConversation) {
+        checkIsWritingAllowed(conversation)
+
+        repository.getChatInfo(
+            conversation,
+            object : MvpOnLoadListener<String> {
+                override fun onResponse(response: String) {
+                    viewState.setChatInfo(response)
+                }
+
+                override fun onError(t: Throwable) {
+                    viewState.setChatInfo(AppGlobal.resources.getString(R.string.error_obtain_chat_info))
+                }
+            })
+    }
+
+    private fun checkIsWritingAllowed(conversation: VKConversation) {
+        if (conversation.isGroupChannel) {
+            viewState.hideChatPanel()
+            return
+        }
+
+        viewState.showChatPanel()
+        viewState.setWritingAllowed(conversation.isAllowed)
+    }
+
+    private fun getCachedMessages(
+        peerId: Int,
+        offset: Int = 0,
+        count: Int = DEFAULT_MESSAGES_COUNT,
+        listener: MvpOnLoadListener<Any?>? = null
+    ) {
+        repository.getCachedMessages(peerId, offset, count,
+            object : MvpOnLoadListener<ArrayList<VKMessage>> {
+                override fun onResponse(response: ArrayList<VKMessage>) {
+                    viewState.hideProgressBar()
+                    fillAdapter(response, offset)
+
+                    listener?.onResponse(null)
+                }
+
+                override fun onError(t: Throwable) {
+                    if (adapter.isEmpty()) {
+                        viewState.showProgressBar()
+                    }
+
+                    listener?.onError(t)
+                }
+            })
+    }
+
+    private fun loadMessages(peerId: Int, offset: Int = 0, count: Int = DEFAULT_MESSAGES_COUNT) {
+        repository.loadMessages(peerId, offset, count,
+            object : MvpOnLoadListener<ArrayList<VKMessage>> {
+                override fun onResponse(response: ArrayList<VKMessage>) {
+                    fillAdapter(response, offset)
+                }
+
+                override fun onError(t: Throwable) {
+
+                }
+
+            })
+    }
+
+    private fun fillAdapter(
+        messages: ArrayList<VKMessage>,
+        offset: Int
+    ) {
+        if (adapter.isEmpty()) adapter.isNotCachedValues = true
+        if (offset == 0) {
+            adapter.updateValues(messages)
+        } else {
+            adapter.addAll(messages)
+        }
+
+        adapter.notifyDataSetChanged()
+
+        if (offset == 0) recyclerView.scrollToPosition(adapter.itemCount - 1)
+    }
+
+    override fun onItemClick(position: Int) {
+
+    }
+
+    override fun onItemLongClick(position: Int) {
+
+    }
+
+    override fun onNewEvent(info: EventInfo<*>) {
+
+    }
+
+    fun sendMessage(
+        text: String = "",
+        attachments: ArrayList<VKModel> = arrayListOf(),
+        scrollToBottom: Boolean = true
+    ) {
+        lastMessageText = text
+
+        val message = VKMessage().also {
+            it.date = (System.currentTimeMillis() / 1000).toInt()
+            it.text = text
+            it.isOut = true
+            it.peerId = peerId
+            it.fromId = UserConfig.userId
+            it.randomId = Random.nextInt()
+        }
+
+        viewState.setMessageText("")
+
+        adapter.addMessage(message, true, scrollToBottom)
+
+        repository.sendMessage(peerId, text, message.randomId, object : MvpOnLoadListener<Int> {
+            override fun onResponse(response: Int) {
+                message.messageId = response
+
+                TaskManager.execute { MemoryCache.put(message) }
+                TaskManager.loadMessage(VKApiKeys.UPDATE_MESSAGE, response)
+            }
+
+            override fun onError(t: Throwable) {
+                viewState.showErrorSnackbar(t)
+
+                viewState.setMessageText(lastMessageText)
+            }
+        })
+    }
+
+}

app/src/main/java/com/meloda/fast/activity/ui/repository/MessagesRepository.kt

@@ -0,0 +1,175 @@
+package com.meloda.fast.activity.ui.repository
+
+import com.meloda.fast.R
+import com.meloda.fast.api.VKApi
+import com.meloda.fast.api.VKApiKeys
+import com.meloda.fast.api.model.VKConversation
+import com.meloda.fast.api.model.VKGroup
+import com.meloda.fast.api.model.VKMessage
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.api.util.VKUtil
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.extensions.ArrayExtensions.asArrayList
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.fast.util.ArrayUtils
+import com.meloda.mvp.MvpOnLoadListener
+import com.meloda.mvp.MvpRepository
+import java.util.*
+
+class MessagesRepository : MvpRepository<VKMessage>() {
+
+    fun loadMessages(
+        peerId: Int,
+        offset: Int,
+        count: Int,
+        listener: MvpOnLoadListener<ArrayList<VKMessage>>
+    ) {
+        TaskManager.execute {
+            VKApi.messages()
+                .getHistory()
+                .peerId(peerId)
+                .reversed(false)
+                .extended(true)
+                .fields(VKUser.DEFAULT_FIELDS + "," + VKGroup.DEFAULT_FIELDS)
+                .offset(offset)
+                .count(count)
+                .executeArray(
+                    VKMessage::class.java,
+                    object : OnResponseListener<ArrayList<VKMessage>> {
+                        override fun onResponse(response: ArrayList<VKMessage>) {
+                            TaskManager.execute {
+                                cacheLoadedMessages(response)
+
+                                MemoryCache.putUsers(VKMessage.profiles)
+                                MemoryCache.putGroups(VKMessage.groups)
+                                MemoryCache.putConversations(VKMessage.conversations)
+
+                                VKUtil.sortMessagesByDate(response, false)
+
+                                sendResponse(listener, response)
+                            }
+                        }
+
+                        override fun onError(t: Throwable) {
+                            sendError(listener, t)
+                        }
+                    })
+        }
+    }
+
+    fun getCachedMessages(
+        peerId: Int, offset: Int, count: Int,
+        listener: MvpOnLoadListener<ArrayList<VKMessage>>
+    ) {
+        TaskManager.execute {
+            val messages = MemoryCache.getMessagesByPeerId(peerId).asArrayList()
+
+            if (messages.isEmpty()) {
+                sendError(listener, NullPointerException("Messages is empty"))
+                return@execute
+            }
+
+            VKUtil.sortMessagesByDate(messages, false)
+
+            val preparedMessages = ArrayUtils.cut(messages, offset, count)
+
+            sendResponseArray(listener, preparedMessages)
+        }
+    }
+
+    fun getCachedConversation(peerId: Int, listener: MvpOnLoadListener<VKConversation>) {
+        TaskManager.execute {
+            val conversation = MemoryCache.getConversationById(peerId)
+
+            if (conversation == null) {
+                sendError(
+                    listener,
+                    NullPointerException("Conversation is not cached at the moment")
+                )
+            } else {
+                sendResponse(listener, conversation)
+            }
+        }
+    }
+
+    fun loadConversation(peerId: Int, listener: MvpOnLoadListener<VKConversation>) {
+        TaskManager.loadConversation(
+            VKApiKeys.UPDATE_CONVERSATION,
+            peerId,
+            object : OnResponseListener<VKConversation> {
+                override fun onResponse(response: VKConversation) {
+                    sendResponse(listener, response)
+                }
+
+                override fun onError(t: Throwable) {
+                    sendError(listener, t)
+                }
+            })
+    }
+
+    fun getChatInfo(conversation: VKConversation, listener: MvpOnLoadListener<String>) {
+        when (conversation.type) {
+            VKConversation.TYPE_CHAT -> {
+                sendResponse(
+                    listener,
+                    AppGlobal.resources.getString(
+                        if (conversation.isGroupChannel)
+                            R.string.group_channel_members
+                        else R.string.chat_members,
+                        conversation.membersCount
+                    )
+                )
+            }
+            VKConversation.TYPE_USER -> {
+                val user = VKUtil.searchUser(conversation.conversationId,
+                    object : OnResponseListener<VKUser> {
+                        override fun onResponse(response: VKUser) {
+                            sendResponse(listener, VKUtil.getUserOnline(response))
+                        }
+
+                        override fun onError(t: Throwable) {
+                            sendError(listener, t)
+                        }
+                    })
+
+                user?.let {
+                    sendResponse(listener, VKUtil.getUserOnline(it))
+                }
+            }
+            else -> {
+                sendResponse(listener, "")
+            }
+        }
+    }
+
+    fun sendMessage(
+        peerId: Int,
+        message: String,
+        randomId: Int,
+        listener: MvpOnLoadListener<Int>
+    ) {
+        TaskManager.execute {
+            VKApi.messages()
+                .send()
+                .peerId(peerId)
+                .message(message)
+                .randomId(randomId)
+                .executeArray(Int::class.java, object : OnResponseListener<ArrayList<Int>> {
+                    override fun onResponse(response: ArrayList<Int>) {
+                        val messageId = response[0]
+                        sendResponse(listener, messageId)
+                    }
+
+                    override fun onError(t: Throwable) {
+                        sendError(listener, t)
+                    }
+                })
+        }
+    }
+
+    private fun cacheLoadedMessages(messages: ArrayList<VKMessage>) {
+        MemoryCache.putMessages(messages)
+    }
+}

app/src/main/java/com/meloda/fast/activity/ui/view/MessagesView.kt

@@ -0,0 +1,24 @@
+package com.meloda.fast.activity.ui.view
+
+import com.meloda.fast.api.model.VKConversation
+import com.meloda.mvp.MvpView
+
+interface MessagesView : MvpView {
+
+    fun showChatPanel()
+
+    fun hideChatPanel()
+
+    fun setWritingAllowed(allowed: Boolean)
+
+    fun setChatInfo(info: String)
+
+    fun openProfile(conversation: VKConversation)
+
+    fun showErrorLoadConversationAlert()
+
+    fun showVoiceRecordingTip()
+
+    fun setMessageText(text: String)
+
+}

app/src/main/java/com/meloda/fast/adapter/ConversationsAdapter.kt

@@ -0,0 +1,687 @@
+package com.meloda.fast.adapter
+
+import android.graphics.Color
+import android.graphics.drawable.ColorDrawable
+import android.net.Uri
+import android.text.SpannableString
+import android.text.TextUtils
+import android.text.style.ForegroundColorSpan
+import android.util.Log
+import android.view.View
+import android.view.ViewGroup
+import android.widget.FrameLayout
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.meloda.fast.R
+import com.meloda.fast.adapter.diffutil.ConversationsCallback
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.api.VKApiKeys
+import com.meloda.fast.api.model.VKConversation
+import com.meloda.fast.api.model.VKGroup
+import com.meloda.fast.api.model.VKMessage
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.api.util.VKUtil
+import com.meloda.fast.base.BaseAdapter
+import com.meloda.fast.base.BaseHolder
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.event.EventInfo
+import com.meloda.fast.extensions.ContextExtensions.color
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.fast.widget.CircleImageView
+
+
+@Suppress("UNCHECKED_CAST")
+class ConversationsAdapter(
+    val recyclerView: RecyclerView,
+    values: ArrayList<VKConversation>
+) : BaseAdapter<VKConversation, ConversationsAdapter.ConversationHolder>(
+    recyclerView.context,
+    values
+), TaskManager.OnEventListener {
+
+    companion object {
+        private const val TAG = "ConversationsAdapter"
+    }
+
+    var isLoading: Boolean = false
+    private var currentPosition: Int = -1
+
+    init {
+        TaskManager.addOnEventListener(this)
+    }
+
+    override fun destroy() {
+        TaskManager.removeOnEventListener(this)
+    }
+
+    override fun onNewEvent(info: EventInfo<*>) {
+        when (info.key) {
+            VKApiKeys.NEW_MESSAGE -> addMessage(info.data as VKMessage)
+            VKApiKeys.EDIT_MESSAGE -> editMessage(info.data as VKMessage)
+            VKApiKeys.RESTORE_MESSAGE -> restoreMessage(info.data as VKMessage)
+            VKApiKeys.READ_MESSAGE -> readMessage(
+                (info.data as Array<Int>)[0],
+                (info.data as Array<Int>)[1]
+            )
+            VKApiKeys.DELETE_MESSAGE -> deleteMessage(
+                (info.data as Array<Int>)[0],
+                (info.data as Array<Int>)[1]
+            )
+
+            VKApiKeys.UPDATE_CONVERSATION -> updateConversation(info.data as Int)
+            VKApiKeys.UPDATE_MESSAGE -> updateMessage(info.data as Int)
+            VKApiKeys.UPDATE_USER -> updateUsers(info.data as ArrayList<Int>)
+            VKApiKeys.UPDATE_GROUP -> updateGroups(info.data as ArrayList<Int>)
+
+        }
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ConversationHolder {
+        return ConversationHolder(view(R.layout.item_conversation, parent))
+    }
+
+    override fun onBindViewHolder(
+        holder: ConversationHolder,
+        position: Int,
+        payloads: MutableList<Any>
+    ) {
+        currentPosition = position
+        initListeners(holder.itemView, position)
+        holder.bind(position, payloads)
+    }
+
+    fun notifyChanges(oldList: List<VKConversation>, newList: List<VKConversation> = values) {
+        val callback = ConversationsCallback(oldList, newList)
+        val diff = DiffUtil.calculateDiff(callback)
+
+        diff.dispatchUpdatesTo(this)
+    }
+
+    fun isLastItem() = currentPosition >= itemCount - 1
+
+    inner class ConversationHolder(v: View) : BaseHolder(v) {
+
+        private var text: TextView = v.findViewById(R.id.conversationText)
+        private var title: TextView = v.findViewById(R.id.conversationTitle)
+        private var avatar: ImageView = v.findViewById(R.id.conversationAvatar)
+        private var online: ImageView = v.findViewById(R.id.conversationUserOnline)
+        private var out: CircleImageView = v.findViewById(R.id.conversationOut)
+        private var counter: TextView = v.findViewById(R.id.conversationCounter)
+        private var date: TextView = v.findViewById(R.id.conversationDate)
+        private var type: ImageView = v.findViewById(R.id.conversationType)
+        private var userAvatar: ImageView = v.findViewById(R.id.conversationUserAvatar)
+        private var root: FrameLayout = v.findViewById(R.id.conversationRoot)
+
+        private val colorHighlight = context.color(R.color.accent)
+
+        override fun bind(position: Int) {
+            bind(position, mutableListOf())
+        }
+
+        fun bind(position: Int, payloads: MutableList<Any>) {
+            Log.d(TAG, "bind position: $position")
+
+            val conversation = this@ConversationsAdapter[position]
+
+            val lastMessage = conversation.lastMessage
+
+            TaskManager.execute {
+                val peerUser: VKUser? =
+                    if (conversation.isUser()) VKUtil.searchUser(conversation.conversationId) else null
+
+                val peerGroup: VKGroup? =
+                    if (conversation.isGroup()) VKUtil.searchGroup(conversation.conversationId) else null
+
+                val fromUser: VKUser? =
+                    if (lastMessage.isFromUser()) VKUtil.searchUser(lastMessage.fromId) else null
+
+                val fromGroup: VKGroup? =
+                    if (lastMessage.isFromGroup()) VKUtil.searchGroup(lastMessage.fromId) else null
+
+                conversation.peerUser = peerUser
+                conversation.peerGroup = peerGroup
+
+                lastMessage.fromUser = fromUser
+                lastMessage.fromGroup = fromGroup
+
+                post {
+                    val dialogTitle = setTitle(conversation, peerUser, peerGroup)
+
+                    if (payloads.isNotEmpty()) {
+                        for (payload in payloads) {
+                            when (payload) {
+                                ConversationsCallback.CONVERSATION -> {
+                                    setUserOnline(conversation, peerUser)
+                                    prepareUserAvatar(
+                                        conversation,
+                                        lastMessage,
+                                        fromUser,
+                                        fromGroup
+                                    )
+                                    prepareAvatar(dialogTitle, conversation, peerUser, peerGroup)
+                                    setDialogType(conversation)
+                                    setIsRead(lastMessage, conversation)
+                                    setCounterBackground(conversation)
+                                }
+                                ConversationsCallback.MESSAGE -> {
+                                    prepareUserAvatar(
+                                        conversation,
+                                        lastMessage,
+                                        fromUser,
+                                        fromGroup
+                                    )
+                                    prepareAttachments(lastMessage)
+                                    setIsRead(lastMessage, conversation)
+                                    setDate(lastMessage)
+                                }
+                                ConversationsCallback.GROUP -> {
+                                    prepareAvatar(dialogTitle, conversation, peerUser, peerGroup)
+                                }
+                                ConversationsCallback.USER -> {
+                                    setUserOnline(conversation, peerUser)
+                                    prepareAvatar(dialogTitle, conversation, peerUser, peerGroup)
+                                }
+                                ConversationsCallback.EDIT_MESSAGE -> {
+                                    prepareUserAvatar(
+                                        conversation,
+                                        lastMessage,
+                                        fromUser,
+                                        fromGroup
+                                    )
+                                    prepareAttachments(lastMessage)
+                                    setIsRead(lastMessage, conversation)
+                                    setDate(lastMessage)
+                                }
+                                ConversationsCallback.DATE -> {
+                                    setDate(lastMessage)
+                                }
+                                ConversationsCallback.ONLINE -> {
+                                    setUserOnline(conversation, peerUser)
+                                }
+                                ConversationsCallback.ATTACHMENTS -> {
+                                    prepareAttachments(lastMessage)
+                                }
+                                ConversationsCallback.AVATAR -> {
+                                    prepareAvatar(dialogTitle, conversation, peerUser, peerGroup)
+                                }
+                                ConversationsCallback.USER_AVATAR -> {
+                                    prepareUserAvatar(
+                                        conversation,
+                                        lastMessage,
+                                        fromUser,
+                                        fromGroup
+                                    )
+                                }
+                                ConversationsCallback.READ -> {
+                                    setIsRead(lastMessage, conversation)
+                                }
+                                ConversationsCallback.NOTIFICATIONS -> {
+                                    setCounterBackground(conversation)
+                                }
+                            }
+                        }
+
+                        return@post
+                    }
+
+                    setUserOnline(conversation, peerUser)
+
+                    prepareUserAvatar(conversation, lastMessage, fromUser, fromGroup)
+
+                    prepareAvatar(dialogTitle, conversation, peerUser, peerGroup)
+
+                    setDialogType(conversation)
+
+                    prepareAttachments(lastMessage)
+
+                    setIsRead(lastMessage, conversation)
+
+                    setDate(lastMessage)
+
+                    setCounterBackground(conversation)
+
+                    root.isVisible = true
+                }
+            }
+        }
+
+        private fun setTitle(
+            conversation: VKConversation,
+            peerUser: VKUser?,
+            peerGroup: VKGroup?
+        ): String {
+            val dialogTitle = VKUtil.getTitle(conversation, peerUser, peerGroup)
+            title.text = dialogTitle
+
+            return dialogTitle
+        }
+
+        private fun setUserOnline(conversation: VKConversation, peerUser: VKUser?) {
+            val onlineIcon = VKUtil.getUserOnlineIcon(context, conversation, peerUser)
+
+            online.setImageDrawable(onlineIcon)
+            online.isVisible = onlineIcon != null
+        }
+
+        private fun prepareUserAvatar(
+            conversation: VKConversation,
+            lastMessage: VKMessage,
+            fromUser: VKUser?,
+            fromGroup: VKGroup?
+        ) {
+            if ((conversation.isChat() || lastMessage.isOut) && !conversation.isGroupChannel) {
+                userAvatar.isVisible = true
+
+                val avatar = VKUtil.getUserAvatar(lastMessage, fromUser, fromGroup)
+
+                if (avatar.isEmpty()) {
+                    userAvatar.setImageDrawable(ColorDrawable(Color.TRANSPARENT))
+                } else {
+                    userAvatar.setImageURI(Uri.parse(avatar))
+                }
+            } else {
+                userAvatar.isVisible = false
+                userAvatar.setImageDrawable(null)
+            }
+        }
+
+        private fun prepareAvatar(
+            dialogTitle: String,
+            conversation: VKConversation,
+            peerUser: VKUser?,
+            peerGroup: VKGroup?
+        ) {
+            val dialogAvatarPlaceholder = VKUtil.getAvatarPlaceholder(context, dialogTitle)
+
+            avatar.setImageDrawable(dialogAvatarPlaceholder)
+
+            val avatarLink = VKUtil.getAvatar(conversation, peerUser, peerGroup)
+
+            if (avatarLink.isNotEmpty()) {
+                avatar.setImageURI(Uri.parse(avatarLink))
+            }
+        }
+
+        private fun setDialogType(conversation: VKConversation) {
+            val dDialogType = VKUtil.getDialogType(context, conversation)
+
+            type.setImageDrawable(dDialogType)
+//            type.isVisible = dDialogType != null
+            type.isVisible = false
+        }
+
+        private fun prepareAttachments(lastMessage: VKMessage) {
+            text.apply {
+                compoundDrawablePadding = 0
+                setCompoundDrawablesRelativeWithIntrinsicBounds(null, null, null, null)
+            }
+
+            if (lastMessage.action == null) {
+                when {
+                    lastMessage.attachments.isNotEmpty() -> {
+                        val attachmentString =
+                            VKUtil.getAttachmentText(context, lastMessage.attachments)
+
+                        val attachmentText =
+                            if (lastMessage.text.isEmpty()) attachmentString else lastMessage.text
+
+                        val startIndex =
+                            if (lastMessage.text.isEmpty()) 0 else lastMessage.text.length
+
+                        val span = SpannableString(attachmentText).apply {
+                            setSpan(
+                                ForegroundColorSpan(colorHighlight),
+                                startIndex,
+                                attachmentText.length,
+                                0
+                            )
+                        }
+
+                        val attachmentDrawable =
+                            VKUtil.getAttachmentDrawable(context, lastMessage.attachments)
+
+                        text.apply {
+                            text = span
+                            setCompoundDrawablesRelativeWithIntrinsicBounds(
+                                attachmentDrawable,
+                                null,
+                                null,
+                                null
+                            )
+                            compoundDrawablePadding = 8
+                        }
+                    }
+                    lastMessage.fwdMessages.isNotEmpty() -> {
+                        val fwdText = VKUtil.getFwdText(context, lastMessage.getForwardedMessages())
+                        val span = SpannableString(fwdText).apply {
+                            setSpan(ForegroundColorSpan(colorHighlight), 0, fwdText.length, 0)
+                        }
+
+                        text.text = span
+                    }
+                    else -> {
+                        text.text = if (text.maxLines == 1) lastMessage.text.replace(
+                            "\n",
+                            " "
+                        ) else lastMessage.text
+                    }
+                }
+            } else {
+                VKUtil.getActionText(context, lastMessage,
+                    object : OnResponseListener<String> {
+                        override fun onResponse(response: String) {
+                            val span = SpannableString(response).apply {
+                                setSpan(
+                                    ForegroundColorSpan(colorHighlight),
+                                    0,
+                                    response.length,
+                                    0
+                                )
+                            }
+
+                            text.text = span
+                        }
+
+                        override fun onError(t: Throwable) {
+                            TODO("Not yet implemented")
+                        }
+
+                    })
+
+            }
+
+            if (lastMessage.attachments.isEmpty() && lastMessage.fwdMessages.isEmpty() && lastMessage.action == null && TextUtils.isEmpty(
+                    lastMessage.text
+                )
+            ) {
+                val unknown = "..."
+                val span = SpannableString(unknown).apply {
+                    setSpan(ForegroundColorSpan(colorHighlight), 0, unknown.length, 0)
+                }
+
+                text.text = span
+            }
+        }
+
+        private fun setIsRead(lastMessage: VKMessage, conversation: VKConversation) {
+            val isRead =
+                ((lastMessage.isOut && conversation.outRead == conversation.lastMessageId ||
+                        !lastMessage.isOut && conversation.inRead == conversation.lastMessageId) && conversation.lastMessageId == lastMessage.messageId) && conversation.unreadCount == 0
+
+            if (isRead) {
+                counter.visibility = View.GONE
+                out.visibility = View.GONE
+            } else {
+                if (lastMessage.isOut) {
+                    out.visibility = View.VISIBLE
+                    counter.visibility = View.GONE
+                    counter.text = ""
+                } else {
+                    out.visibility = View.GONE
+                    counter.visibility = View.VISIBLE
+                    counter.text = conversation.unreadCount.toString()
+                }
+            }
+        }
+
+        private fun setDate(lastMessage: VKMessage) {
+            val dateText = VKUtil.getTime(context, lastMessage)
+            date.text = dateText
+        }
+
+        private fun setCounterBackground(conversation: VKConversation) {
+            counter.background.setTint(if (conversation.isNotificationsDisabled()) Color.GRAY else colorHighlight)
+        }
+    }
+
+    @Deprecated("Message is bad")
+    private fun addMessage(message: VKMessage) {
+        val index = searchConversationIndex(message.peerId)
+
+        val oldList = ArrayList(values)
+
+        if (index >= 0) {
+            val currentConversation = this[index]
+
+            val conversation = prepareConversation(currentConversation, message)
+
+            removeAt(index)
+            add(0, conversation)
+            notifyChanges(oldList)
+        } else {
+            TaskManager.loadConversation(
+                VKApiKeys.UPDATE_CONVERSATION,
+                message.peerId,
+                null
+            )
+
+            TaskManager.execute {
+                val cachedConversation = MemoryCache.getConversationById(message.peerId)
+                if (cachedConversation != null) {
+                    add(0, prepareConversation(cachedConversation, message))
+                    post { notifyChanges(oldList) }
+                    return@execute
+                }
+
+                val tempConversations = VKConversation().apply {
+                    conversationId = message.peerId
+
+                    localId =
+                        if (VKUtil.isChatId(conversationId)) conversationId - 2000000000 else conversationId
+                    type =
+                        if (conversationId < 0) VKConversation.TYPE_GROUP else if (conversationId > 2000000000) VKConversation.TYPE_CHAT else VKConversation.TYPE_USER
+
+                    lastMessage = message
+                    lastMessageId = message.messageId
+                }
+
+                add(0, tempConversations)
+
+                post { notifyChanges(oldList) }
+            }
+        }
+
+        val firstVisiblePosition =
+            (recyclerView.layoutManager as LinearLayoutManager).findFirstVisibleItemPosition()
+
+        if (firstVisiblePosition <= 1) recyclerView.scrollToPosition(0)
+    }
+
+    private fun editMessage(message: VKMessage) {
+        val index = searchConversationIndex(message.peerId)
+        if (index == -1) return
+
+        val conversation = getItem(index)
+
+        if (conversation.lastMessageId != message.messageId) return
+
+        conversation.lastMessage = message
+
+        notifyItemChanged(index, ConversationsCallback.EDIT_MESSAGE)
+    }
+
+    private fun readMessage(peerId: Int, messageId: Int) {
+        val index = searchConversationIndex(peerId)
+        if (index == -1) return
+
+        val conversation = getItem(index)
+        val message = conversation.lastMessage
+
+        if (message.isInbox()) {
+            conversation.inRead = messageId
+        } else {
+            conversation.outRead = messageId
+        }
+
+        conversation.unreadCount = if (conversation.lastMessageId == messageId) {
+            0
+        } else {
+            conversation.lastMessageId - messageId
+        }
+
+        notifyItemChanged(index, ConversationsCallback.READ)
+    }
+
+    @Deprecated("Need to rewrite")
+    private fun deleteMessage(peerId: Int, messageId: Int) {
+        return
+        val index = searchConversationIndex(peerId)
+        if (index == -1) return
+
+        val oldList = ArrayList(values)
+
+        val oldDialog = values[index]
+
+        val dialog = oldDialog.clone()
+
+        TaskManager.execute {
+            val cachedMessages = MemoryCache.getMessagesByPeerId(dialog.conversationId)
+            val messages = VKUtil.sortMessagesByDate(ArrayList(cachedMessages), true)
+
+            if (messages.isEmpty()) {
+                MemoryCache.deleteConversation(dialog.conversationId)
+
+                AppGlobal.post {
+                    removeAt(index)
+                    notifyChanges(oldList)
+                }
+            } else {
+                val lastMessage = messages[0]
+
+                dialog.lastMessageId = lastMessage.messageId
+                dialog.lastMessage = lastMessage
+
+                set(index, dialog)
+
+                VKUtil.sortConversationsByDate(values, true)
+
+                AppGlobal.post {
+                    notifyChanges(oldList)
+                }
+            }
+        }
+    }
+
+    @Deprecated("Message is bad")
+    private fun restoreMessage(message: VKMessage) {
+        val index = searchConversationIndex(message.peerId)
+        if (index == -1) return
+
+        val oldList = ArrayList<VKConversation>().apply { addAll(values) }
+        val oldDialog = values[index]
+
+        val dialog = oldDialog.clone()
+
+        TaskManager.execute {
+            val messages =
+                MemoryCache.getMessagesByPeerId(dialog.conversationId).apply { addMessage(message) }
+
+            VKUtil.sortMessagesByDate(ArrayList(messages), true)
+
+            val lastMessage = messages[0]
+
+            dialog.lastMessageId = lastMessage.messageId
+            dialog.lastMessage = lastMessage
+
+            set(index, dialog)
+
+            VKUtil.sortConversationsByDate(values, true)
+
+            AppGlobal.handler.post {
+                notifyChanges(oldList)
+
+//                fragmentConversations.presenter.checkListIsEmpty(values)
+            }
+        }
+    }
+
+    private fun prepareConversation(
+        conversation: VKConversation,
+        newMessage: VKMessage
+    ): VKConversation {
+        conversation.lastMessage = newMessage
+        conversation.lastMessageId = newMessage.messageId
+
+        if (newMessage.isOut) {
+            conversation.unreadCount = 0
+            newMessage.isRead = false
+        } else {
+            conversation.unreadCount++
+        }
+
+        if (newMessage.peerId == newMessage.fromId && newMessage.fromId == UserConfig.userId) { //для лс
+            conversation.outRead = newMessage.messageId
+        }
+
+        return conversation
+    }
+
+    private fun searchConversationIndex(peerId: Int): Int {
+        for (i in values.indices) {
+            if (getItem(i).conversationId == peerId) return i
+        }
+        return -1
+    }
+
+    private fun searchMessageIndex(messageId: Int): Int {
+        for (i in values.indices) {
+            if (getItem(i).lastMessageId == messageId) return i
+        }
+        return -1
+    }
+
+    private fun updateConversation(peerId: Int) {
+        val index = searchConversationIndex(peerId)
+        if (index == -1) return
+
+        TaskManager.execute {
+            val conversation = MemoryCache.getConversationById(peerId) ?: return@execute
+
+            set(index, conversation)
+
+            AppGlobal.post { notifyItemChanged(index, ConversationsCallback.CONVERSATION) }
+        }
+    }
+
+    private fun updateGroups(groupIds: ArrayList<Int>) {
+        for (groupId in groupIds) {
+            val index = searchConversationIndex(groupId)
+            if (index == -1) return
+
+            notifyItemChanged(index)
+        }
+    }
+
+    private fun updateUsers(userIds: ArrayList<Int>) {
+        for (userId in userIds) {
+            val index = searchConversationIndex(userId)
+            if (index == -1) return
+
+            notifyItemChanged(index)
+        }
+    }
+
+    private fun updateMessage(messageId: Int) {
+        val index = searchMessageIndex(messageId)
+        if (index == -1) return
+
+
+        TaskManager.execute {
+            val conversation = getItem(index).clone()
+
+            conversation.apply {
+                lastMessageId = messageId
+                lastMessage = MemoryCache.getMessageById(messageId) ?: return@execute
+            }
+
+            AppGlobal.handler.post { notifyItemChanged(index, ConversationsCallback.MESSAGE) }
+        }
+    }
+
+}

app/src/main/java/com/meloda/fast/adapter/MessagesAdapter.kt

@@ -0,0 +1,589 @@
+package com.meloda.fast.adapter
+
+import android.content.Context
+import android.graphics.Typeface
+import android.text.SpannableString
+import android.text.style.StyleSpan
+import android.util.Log
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.R
+import com.meloda.fast.activity.MessagesActivity
+import com.meloda.fast.api.VKApiKeys
+import com.meloda.fast.api.model.*
+import com.meloda.fast.api.util.VKUtil
+import com.meloda.fast.base.BaseAdapter
+import com.meloda.fast.base.BaseHolder
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.event.EventInfo
+import com.meloda.fast.extensions.FloatExtensions.int
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.fast.util.AndroidUtils
+import com.meloda.fast.util.ImageUtils
+import com.meloda.fast.widget.BoundedLinearLayout
+import com.meloda.fast.widget.CircleImageView
+import java.text.SimpleDateFormat
+import java.util.*
+import kotlin.math.abs
+
+
+@Suppress("UNCHECKED_CAST")
+class MessagesAdapter(
+    context: Context,
+    values: ArrayList<VKMessage>,
+    var conversation: VKConversation
+
+) : BaseAdapter<VKMessage, MessagesAdapter.Holder>(context, values),
+    TaskManager.OnEventListener {
+
+    companion object {
+        private const val TYPE_FOOTER = 10101
+
+        private const val TYPE_NORMAL_IN = 7910
+        private const val TYPE_NORMAL_OUT = 7911
+
+        private const val TYPE_ATTACHMENT_IN = 7920
+        private const val TYPE_ATTACHMENT_OUT = 7921
+
+        private const val TYPE_ACTION = 7930
+
+        private const val TYPE_NORMAL_CHANNEL = 7940
+
+        const val TAG = "MessagesAdapter"
+    }
+
+    private var recyclerView = (context as MessagesActivity).recyclerView
+    private var layoutManager = recyclerView.layoutManager as LinearLayoutManager
+
+    var isNotCachedValues = false
+
+    init {
+        TaskManager.addOnEventListener(this)
+    }
+
+    override fun destroy() {
+        TaskManager.removeOnEventListener(this)
+    }
+
+    override fun onNewEvent(info: EventInfo<*>) {
+        when (info.key) {
+            VKApiKeys.NEW_MESSAGE -> addMessage(info.data as VKMessage)
+
+            VKApiKeys.READ_MESSAGE -> readMessage(
+                (info.data as Array<Int>)[0],
+                (info.data as Array<Int>)[1]
+            )
+
+            VKApiKeys.RESTORE_MESSAGE -> restoreMessage(info.data as VKMessage)
+            VKApiKeys.EDIT_MESSAGE -> editMessage(info.data as VKMessage)
+            VKApiKeys.DELETE_MESSAGE -> deleteMessage(
+                (info.data as Array<Int>)[0],
+                (info.data as Array<Int>)[1]
+            )
+
+            VKApiKeys.UPDATE_MESSAGE -> updateMessage(info.data as Int)
+            VKApiKeys.UPDATE_USER -> updateUser(info.data as ArrayList<Int>)
+            VKApiKeys.UPDATE_GROUP -> updateGroup(info.data as ArrayList<Int>)
+
+            else -> return
+        }
+    }
+
+    override fun getItemCount(): Int {
+        return values.size + 1
+    }
+
+    override fun getItemViewType(position: Int): Int {
+        if (position == values.size) return TYPE_FOOTER
+
+        val message = getItem(position)
+
+        return when {
+            message.action != null -> TYPE_ACTION
+            conversation.isGroupChannel -> TYPE_NORMAL_CHANNEL
+            message.isOut && message.attachments.isEmpty() && message.fwdMessages.isEmpty() -> TYPE_NORMAL_OUT
+            !message.isOut && message.attachments.isEmpty() && message.fwdMessages.isEmpty() -> TYPE_NORMAL_IN
+            message.isOut && (message.attachments.isNotEmpty() || message.fwdMessages.isNotEmpty()) -> TYPE_ATTACHMENT_OUT
+            !message.isOut && (message.attachments.isNotEmpty() || message.fwdMessages.isNotEmpty()) -> TYPE_ATTACHMENT_IN
+            else -> 0
+        }
+    }
+
+    override fun onCreateViewHolder(viewGroup: ViewGroup, type: Int): Holder {
+        return when (type) {
+            TYPE_FOOTER -> FooterHolder(generateEmptyView())
+
+            TYPE_NORMAL_IN -> ItemNormalIn(view(R.layout.item_message_normal_in, viewGroup))
+            TYPE_NORMAL_OUT -> ItemNormalOut(view(R.layout.item_message_normal_out, viewGroup))
+
+            TYPE_ATTACHMENT_IN -> ItemAttachmentIn(
+                view(
+                    R.layout.item_message_attachment_in,
+                    viewGroup
+                )
+            )
+            TYPE_ATTACHMENT_OUT -> ItemAttachmentOut(
+                view(
+                    R.layout.item_message_attachment_out,
+                    viewGroup
+                )
+            )
+
+            TYPE_ACTION -> ItemAction(view(R.layout.item_message_action, viewGroup))
+
+            TYPE_NORMAL_CHANNEL -> ItemChannel(view(R.layout.item_message_channel, viewGroup))
+
+            else -> PlaceHolder(view(R.layout.item_message, viewGroup))
+        }
+    }
+
+    override fun onBindViewHolder(holder: Holder, position: Int) {
+        if (BuildConfig.DEBUG) {
+            Log.d(TAG, "bind position: $position")
+        }
+
+        if (holder is FooterHolder) return
+
+        super.onBindViewHolder(holder, position)
+        if (!isNotCachedValues) return
+
+        val message = this[position]
+
+        if (message.isUnreaded()) {
+            TaskManager.readMessage(
+                VKApiKeys.READ_MESSAGE,
+                conversation.conversationId,
+                message.messageId
+            )
+        }
+    }
+
+    private fun generateEmptyView(): View {
+        return View(context).also {
+            it.isFocusable = false
+            it.isClickable = false
+            it.isEnabled = false
+            it.layoutParams = ViewGroup.LayoutParams(
+                ViewGroup.LayoutParams.MATCH_PARENT,
+                if (conversation.isGroupChannel) 0 else AndroidUtils.px(74f).int()
+            )
+        }
+    }
+
+    inner class FooterHolder(v: View) : Holder(v) {
+        override fun bind(position: Int) {}
+    }
+
+    inner class ItemChannel(v: View) : ItemNormalIn(v) {
+        private val title: TextView = v.findViewById(R.id.channelTitle)
+
+        override fun bind(position: Int) {
+            val message = getItem(position)
+
+            ViewController().prepareDate(message, date)
+
+            val avatarString = conversation.photo100
+
+            val placeHolder = VKUtil.getAvatarPlaceholder(context, conversation.title)
+
+            avatar.setImageDrawable(placeHolder)
+            ImageUtils.loadImage(avatarString, avatar, placeHolder)
+
+            title.text = conversation.title
+
+            text.text = message.text
+
+            root.visibility = View.VISIBLE
+        }
+    }
+
+    inner class ItemAction(v: View) : Holder(v) {
+        private val text: TextView = v.findViewById(R.id.messageAction)
+
+        override fun bind(position: Int) {
+            val message = getItem(position)
+
+            TaskManager.execute {
+                val user = searchUser(message)
+                val group = searchGroup(message)
+
+                val name =
+                    (if (group == null && !VKGroup.isGroupId(message.fromId)) user?.firstName else group?.name)
+                        ?: "null"
+
+                VKUtil.getActionText(context, message, object : OnResponseListener<String> {
+
+                    override fun onResponse(response: String) {
+                        val actionText = "$name $response"
+
+                        val spannable = SpannableString(actionText)
+                        spannable.setSpan(StyleSpan(Typeface.BOLD), 0, name.length, 0)
+
+                        text.text = spannable
+                    }
+
+                    override fun onError(t: Throwable) {
+                    }
+                })
+
+                post { text.isVisible = true }
+            }
+        }
+    }
+
+    open inner class ItemNormalIn(v: View) : NormalViewHolder(v) {
+
+        override fun bind(position: Int) {
+            val message = getItem(position)
+
+            TaskManager.execute {
+                val user = searchUser(message)
+                val group = searchGroup(message)
+
+                post {
+                    ViewController().apply {
+                        prepareText(message, bubble, text)
+                        prepareDate(message, date)
+                        prepareAvatar(message, avatar)
+                        loadAvatarImage(message, user, group, avatar)
+                    }
+
+                    root.isVisible = true
+                }
+            }
+        }
+    }
+
+    inner class ItemAttachmentIn(v: View) : ItemNormalIn(v) {
+        val attachments: LinearLayout = v.findViewById(R.id.messageAttachments)
+
+        override fun bind(position: Int) {
+            super.bind(position)
+
+            val message = getItem(position)
+
+            AttachmentInflater.showAttachments(message, this)
+        }
+    }
+
+    open inner class ItemNormalOut(v: View) : NormalViewHolder(v) {
+
+        override fun bind(position: Int) {
+            val message = getItem(position)
+
+            TaskManager.execute {
+                val user = searchUser(message)
+                val group = searchGroup(message)
+
+                post {
+                    ViewController().apply {
+                        prepareText(message, bubble, text)
+                        prepareDate(message, date)
+                        prepareAvatar(message, avatar)
+                        loadAvatarImage(message, user, group, avatar)
+                    }
+
+                    root.isVisible = true
+                }
+            }
+        }
+    }
+
+    inner class ItemAttachmentOut(v: View) : ItemNormalOut(v) {
+
+        val attachments: LinearLayout = v.findViewById(R.id.messageAttachments)
+
+        override fun bind(position: Int) {
+            super.bind(position)
+
+            val message = getItem(position)
+
+            AttachmentInflater.showAttachments(message, this)
+        }
+
+    }
+
+    abstract inner class NormalViewHolder(v: View) : Holder(v) {
+        protected val date: TextView = v.findViewById(R.id.messageDate)
+        protected val text: TextView = v.findViewById(R.id.messageText)
+        protected val root: LinearLayout = v.findViewById(R.id.messageRoot)
+        protected val bubble: BoundedLinearLayout = v.findViewById(R.id.messageBubble)
+        protected val avatar: CircleImageView = v.findViewById(R.id.messageAvatar)
+    }
+
+    object AttachmentInflater {
+        fun showAttachments(message: VKMessage, holder: NormalViewHolder) {
+            val attachments =
+                (if (holder is ItemAttachmentOut) holder.attachments else if (holder is ItemAttachmentIn) holder.attachments else null)
+                    ?: return
+
+            if (message.fwdMessages.isNotEmpty() || message.attachments.isNotEmpty()) {
+                attachments.visibility = View.VISIBLE
+                attachments.removeAllViews()
+            } else {
+                attachments.visibility = View.GONE
+            }
+
+            if (message.attachments.isNotEmpty()) {
+                prepareAttachments(message, attachments)
+            }
+
+            if (message.fwdMessages.isNotEmpty()) {
+                prepareForwardedMessages(message, attachments)
+            }
+        }
+
+        private fun prepareAttachments(message: VKMessage, attachments: LinearLayout) {
+            for (attachment in message.attachments) {
+                when (attachment) {
+                    is VKPhoto -> photo(message, attachments)
+                    is VKVideo -> video(message, attachments)
+                    is VKLink -> link(message, attachments)
+                    is VKAudio -> audio(message, attachments)
+                    is VKDoc -> doc(message, attachments)
+                }
+            }
+        }
+
+        private fun prepareForwardedMessages(message: VKMessage, attachments: LinearLayout) {
+
+        }
+
+        fun link(message: VKMessage, attachments: LinearLayout) {
+
+        }
+
+        fun video(message: VKMessage, attachments: LinearLayout) {
+
+        }
+
+        fun photo(message: VKMessage, attachments: LinearLayout) {
+        }
+
+        fun audio(message: VKMessage, attachments: LinearLayout) {
+
+        }
+
+        fun doc(message: VKMessage, attachments: LinearLayout) {
+
+        }
+    }
+
+    inner class ViewController {
+
+        fun prepareText(message: VKMessage, bubble: BoundedLinearLayout, text: TextView) {
+            val screenWidth = context.resources.displayMetrics.widthPixels
+            val boundedWidth = screenWidth - screenWidth / 5
+            bubble.maxWidth = boundedWidth
+
+
+
+            text.setTextColor(
+                AndroidUtils.getThemeAttrColor(
+                    context,
+                    if (message.isOutbox()) R.attr.messageOutTextColor else R.attr.messageInTextColor
+                )
+            )
+            text.text = VKUtil.matchMentions(message.text)
+        }
+
+        fun prepareDate(message: VKMessage, date: TextView) {
+            var dateText =
+                SimpleDateFormat("HH:mm", Locale.getDefault()).format(message.date * 1000L)
+
+            if (message.editTime > 0) {
+                dateText += ", ${
+                    context.getString(R.string.edited)
+                        .toLowerCase(Locale.getDefault())
+                }"
+            }
+
+            date.text = dateText
+        }
+
+        fun prepareAvatar(message: VKMessage, avatar: ImageView) {
+            avatar.isVisible = !message.isOut
+        }
+
+        fun loadAvatarImage(message: VKMessage, user: VKUser?, group: VKGroup?, avatar: ImageView) {
+            val dialogTitle = VKUtil.getMessageTitle(message, user, group)
+            val avatarPlaceholder = VKUtil.getAvatarPlaceholder(context, dialogTitle)
+
+            avatar.setImageDrawable(avatarPlaceholder)
+
+            val avatarString = VKUtil.getUserAvatar(message, user, group)
+
+            ImageUtils.loadImage(avatarString, avatar, avatarPlaceholder)
+        }
+
+    }
+
+    open inner class Holder(v: View) : BaseHolder(v) {
+        override fun bind(position: Int) {
+        }
+    }
+
+    inner class PlaceHolder(v: View) : NormalViewHolder(v)
+
+    private fun searchUser(message: VKMessage): VKUser? {
+        if (!message.isFromUser()) return null
+
+        return VKUtil.searchUser(message.fromId)
+    }
+
+    private fun searchGroup(message: VKMessage): VKGroup? {
+        if (!message.isFromGroup()) return null
+
+        return VKUtil.searchGroup(message.fromId)
+    }
+
+    private fun updateGroup(groupIds: ArrayList<Int>) {
+        for (groupId in groupIds) {
+            var index = -1
+
+            for (i in values.indices) {
+                val item = getItem(i)
+
+                if (abs(item.fromId) == groupId) {
+                    index = i
+                    break
+                }
+            }
+
+            if (index == -1) return
+
+            notifyItemChanged(index)
+        }
+    }
+
+    private fun updateUser(userIds: ArrayList<Int>) {
+        for (userId in userIds) {
+            var index = -1
+
+            for (i in values.indices) {
+                val item = getItem(i)
+
+                if (item.fromId == userId) {
+                    index = i
+                    break
+                }
+            }
+
+            if (index == -1) return
+            notifyItemChanged(index)
+        }
+    }
+
+    private fun updateMessage(messageId: Int) {
+        var index = -1
+
+        for (i in values.indices) {
+            val item = getItem(i)
+
+            if (item.messageId == messageId) {
+                index = i
+                break
+            }
+        }
+
+        if (index == -1) return
+
+        TaskManager.execute {
+            AppGlobal.database.messages.getById(messageId)?.let {
+                values[index] = it
+
+                post { notifyItemChanged(index) }
+            }
+        }
+    }
+
+    private fun searchMessagePosition(messageId: Int): Int {
+        for (i in values.indices) {
+            if (getItem(i).messageId == messageId) return i
+        }
+
+        return -1
+    }
+
+    private fun containsRandomId(randomId: Int): Boolean {
+        for (message in values) {
+            if (message.randomId == randomId) return true
+        }
+
+        return false
+    }
+
+    fun addMessage(message: VKMessage, fromApp: Boolean = false, withScroll: Boolean = false) {
+        val randomId = message.randomId
+        if (randomId > 0 && containsRandomId(message.randomId) || message.peerId != conversation.conversationId) return
+
+        add(message)
+
+        notifyDataSetChanged()
+
+        val lastVisiblePosition = layoutManager.findLastVisibleItemPosition()
+
+        if ((message.isInbox() && lastVisiblePosition >= itemCount - 2) || !fromApp || withScroll) {
+            recyclerView.scrollToPosition(itemCount - 1)
+        }
+    }
+
+    private fun readMessage(peerId: Int, messageId: Int) {
+        if (peerId != conversation.conversationId) return
+
+        val index = searchMessagePosition(messageId)
+        if (index == -1) return
+
+        val message = this[index]
+        message.isRead = true
+
+        notifyDataSetChanged()
+
+        if (message.isInbox()) {
+            conversation.inRead = messageId
+        } else {
+            conversation.outRead = messageId
+        }
+
+        conversation.unreadCount--
+
+        TaskManager.execute {
+            MemoryCache.put(message)
+            MemoryCache.put(conversation)
+        }
+    }
+
+    fun editMessage(message: VKMessage) {
+        val index = searchMessagePosition(message.messageId)
+        if (index == -1) return
+
+        set(index, message)
+        notifyDataSetChanged()
+    }
+
+    fun deleteMessage(messageId: Int, peerId: Int) {
+        if (peerId != conversation.conversationId) return
+
+        val index = searchMessagePosition(messageId)
+        if (index == -1) return
+
+        removeAt(index)
+        notifyDataSetChanged()
+    }
+
+    //TODO: кривое сообщение
+    fun restoreMessage(message: VKMessage) {
+        if (message.peerId != conversation.conversationId) return
+
+        updateValues(VKUtil.sortMessagesByDate(values.apply { add(message) }, false))
+        notifyDataSetChanged()
+    }
+}

app/src/main/java/com/meloda/fast/adapter/SimpleItemAdapter.kt

@@ -0,0 +1,35 @@
+package com.meloda.fast.adapter
+
+import android.content.Context
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import com.meloda.fast.R
+import com.meloda.fast.base.BaseAdapter
+import com.meloda.fast.base.BaseHolder
+import com.meloda.fast.item.SimpleMenuItem
+import java.util.*
+
+class SimpleItemAdapter(context: Context, values: ArrayList<SimpleMenuItem>) :
+    BaseAdapter<SimpleMenuItem, SimpleItemAdapter.ViewHolder>(context, values) {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        return ViewHolder(view(R.layout.item_simple_menu, parent))
+    }
+
+    inner class ViewHolder(v: View) : BaseHolder(v) {
+
+        private val title: TextView = v.findViewById(R.id.profileItemTitle)
+        private val icon: ImageView = v.findViewById(R.id.profileItemIcon)
+
+        override fun bind(position: Int) {
+            val item = getItem(position)
+
+            title.text = item.title
+
+            icon.setImageDrawable(item.icon)
+        }
+
+    }
+}

app/src/main/java/com/meloda/fast/adapter/UsersAdapter.kt

@@ -0,0 +1,68 @@
+package com.meloda.fast.adapter
+
+import android.content.Context
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.DiffUtil
+import com.meloda.fast.R
+import com.meloda.fast.adapter.diffutil.UsersCallback
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.api.util.VKUtil
+import com.meloda.fast.base.BaseAdapter
+import com.meloda.fast.base.BaseHolder
+import com.meloda.fast.util.ImageUtils
+import com.meloda.fast.widget.CircleImageView
+
+class UsersAdapter(context: Context, values: ArrayList<VKUser>) :
+    BaseAdapter<VKUser, UsersAdapter.ViewHolder>(context, values) {
+
+    var isLoading: Boolean = false
+    var currentPosition: Int = 0
+
+    fun isLastItem() = currentPosition >= itemCount - 1
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        return ViewHolder(view(R.layout.item_user, parent))
+    }
+
+    open inner class ViewHolder(v: View) : BaseHolder(v) {
+        private val avatar: CircleImageView = v.findViewById(R.id.userAvatar)
+        private val name: TextView = v.findViewById(R.id.userName)
+        private val online: ImageView = v.findViewById(R.id.userOnline)
+        private val onlineText: TextView = v.findViewById(R.id.userOnlineText)
+
+        override fun bind(position: Int) {
+            currentPosition = position
+
+            val user = getItem(position)
+
+            name.text = user.toString()
+
+            val avatarPlaceholder = VKUtil.getAvatarPlaceholder(context, user.toString())
+            avatar.setImageDrawable(avatarPlaceholder)
+
+            ImageUtils.loadImage(user.photo200, avatar, avatarPlaceholder)
+
+            online.isVisible = false
+
+            VKUtil.getUserOnlineIcon(context, user)?.let {
+                online.setImageDrawable(it)
+                online.isVisible = true
+            }
+
+            onlineText.text = VKUtil.getUserOnline(user)
+
+            //TODO: отладить открытие чата
+        }
+    }
+
+    fun notifyChanges(oldList: List<VKUser>, newList: List<VKUser> = values) {
+        val callback = UsersCallback(oldList, newList)
+        val diff = DiffUtil.calculateDiff(callback, false)
+
+        diff.dispatchUpdatesTo(this)
+    }
+}

app/src/main/java/com/meloda/fast/adapter/diffutil/ConversationsCallback.kt

@@ -0,0 +1,95 @@
+package com.meloda.fast.adapter.diffutil
+
+import androidx.recyclerview.widget.DiffUtil
+import com.meloda.fast.api.model.VKConversation
+
+class ConversationsCallback(
+    private val oldList: List<VKConversation>,
+    private val newList: List<VKConversation>
+) : DiffUtil.Callback() {
+
+    companion object {
+        const val DATE = "date"
+        const val ONLINE = "online"
+        const val AVATAR = "avatar"
+        const val USER_AVATAR = "user_avatar"
+        const val ATTACHMENTS = "attachments"
+        const val READ = "read"
+        const val NOTIFICATIONS = "notifications"
+        const val EDIT_MESSAGE = "edit_message"
+        const val MESSAGE = "message"
+        const val USER = "user"
+        const val GROUP = "group"
+        const val CONVERSATION = "conversation"
+    }
+
+    override fun getOldListSize() = oldList.size
+
+    override fun getNewListSize() = newList.size
+
+    override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
+        val old = oldList[oldItemPosition]
+        val new = newList[newItemPosition]
+
+        if (true) return false
+        return old.conversationId == new.conversationId
+    }
+
+    override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
+        val old = oldList[oldItemPosition]
+        val new = newList[newItemPosition]
+
+        val oldMessage = old.lastMessage
+        val newMessage = new.lastMessage
+
+        if (true) return false else
+
+            return old.title == new.title &&
+                    old.lastMessageId == new.lastMessageId &&
+                    old.photo50 == new.photo50 &&
+                    old.unreadCount == new.unreadCount &&
+
+                    old.isNoSound == new.isNoSound &&
+                    old.isDisabledForever == new.isDisabledForever &&
+                    old.disabledUntil == new.disabledUntil &&
+
+                    old.inRead == new.inRead &&
+                    old.outRead == new.outRead &&
+
+                    old.peerUser == new.peerUser &&
+                    old.peerGroup == new.peerGroup &&
+
+                    oldMessage == newMessage
+
+//                oldMessage.messageId == newMessage.messageId &&
+//                oldMessage.isOut == newMessage.isOut &&
+//                oldMessage.fromId == newMessage.fromId &&
+//                oldMessage.date == newMessage.date &&
+//                oldMessage.action == newMessage.action &&
+//                oldMessage.text == newMessage.text &&
+//                oldMessage.attachments == newMessage.attachments &&
+//                oldMessage.fwdMessages == newMessage.fwdMessages &&
+//                oldMessage.messageId == newMessage.messageId &&
+//
+//                oldMessage.fromUser == newMessage.fromUser &&
+//                oldMessage.fromGroup == newMessage.fromGroup
+    }
+
+    override fun getChangePayload(oldItemPosition: Int, newItemPosition: Int): Any? {
+        val oldConversation = oldList[oldItemPosition]
+        val newConversation = newList[newItemPosition]
+
+        val oldMessage = oldConversation.lastMessage
+        val newMessage = newConversation.lastMessage
+
+        val oldDate = oldMessage.date
+        val newDate = newMessage.date
+
+//        if (oldDate != newDate) return DATE
+
+//        if (oldMessage != newMessage) return MESSAGE
+
+        return super.getChangePayload(oldItemPosition, newItemPosition)
+    }
+
+}

app/src/main/java/com/meloda/fast/adapter/diffutil/UsersCallback.kt

@@ -0,0 +1,51 @@
+package com.meloda.fast.adapter.diffutil
+
+import androidx.recyclerview.widget.DiffUtil
+import com.meloda.fast.api.model.VKUser
+
+class UsersCallback(private val oldList: List<VKUser>, private val newList: List<VKUser>) :
+    DiffUtil.Callback() {
+
+    companion object {
+        const val ONLINE = "online"
+        const val ONLINE_MOBILE = "online_mobile"
+    }
+
+    override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
+        val old = oldList[oldItemPosition]
+        val new = newList[newItemPosition]
+
+        return old.userId == new.userId
+    }
+
+    override fun getOldListSize() = oldList.size
+
+    override fun getNewListSize() = newList.size
+
+    override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
+        val old = oldList[oldItemPosition]
+        val new = newList[newItemPosition]
+
+        return old.firstName == new.firstName &&
+                old.lastName == new.lastName &&
+                old.isOnline == new.isOnline &&
+                old.isOnlineMobile == new.isOnlineMobile &&
+                old.lastSeen == new.lastSeen &&
+                old.lastSeenPlatform == new.lastSeenPlatform &&
+                old.deactivated == new.deactivated
+    }
+
+    override fun getChangePayload(oldItemPosition: Int, newItemPosition: Int): Any? {
+        val old = oldList[oldItemPosition]
+        val new = newList[newItemPosition]
+
+        if (old.isOnlineMobile != new.isOnlineMobile) {
+            if (old.isOnline != new.isOnline) return ONLINE
+
+            return ONLINE_MOBILE
+        }
+
+        return super.getChangePayload(oldItemPosition, newItemPosition)
+    }
+
+}

app/src/main/java/com/meloda/fast/api/ErrorCodes.kt

@@ -0,0 +1,42 @@
+package com.meloda.fast.api
+
+object ErrorCodes {
+    const val UNKNOWN_ERROR = 1
+    const val APP_DISABLED = 2
+    const val UNKNOWN_METHOD = 3
+    const val INVALID_SIGNATURE = 4
+    const val USER_AUTHORIZATION_FAILED = 5
+    const val TOO_MANY_REQUESTS = 6
+    const val NO_RIGHTS = 7
+    const val BAD_REQUEST = 8
+    const val TOO_MANY_SIMILAR_ACTIONS = 9
+    const val INTERNAL_SERVER_ERROR = 10
+    const val IN_TEST_MODE = 11
+    const val EXECUTE_CODE_COMPILE_ERROR = 12
+    const val EXECUTE_CODE_RUNTIME_ERROR = 13
+    const val CAPTCHA_NEEDED = 14
+    const val ACCESS_DENIED = 15
+    const val REQUIRES_REQUESTS_OVER_HTTPS = 16
+    const val VALIDATION_REQUIRED = 17
+    const val USER_BANNED_OR_DELETED = 18
+    const val ACTION_PROHIBITED = 20
+    const val ACTION_ALLOWED_ONLY_FOR_STANDALONE = 21
+    const val METHOD_OFF = 23
+    const val CONFIRMATION_REQUIRED = 24
+    const val PARAMETER_IS_NOT_SPECIFIED = 100
+    const val INCORRECT_APP_ID = 101
+    const val OUT_OF_LIMITS = 103
+    const val INCORRECT_USER_ID = 113
+    const val INCORRECT_TIMESTAMP = 150
+    const val ACCESS_TO_ALBUM_DENIED = 200
+    const val ACCESS_TO_AUDIO_DENIED = 201
+    const val ACCESS_TO_GROUP_DENIED = 203
+    const val ALBUM_IS_FULL = 300
+    const val ACTION_DENIED = 500
+    const val PERMISSION_DENIED = 600
+    const val CANNOT_SEND_MESSAGE_BLACK_LIST = 900
+    const val CANNOT_SEND_MESSAGE_GROUP = 901
+    const val INVALID_DOC_ID = 1150
+    const val INVALID_DOC_TITLE = 1152
+    const val ACCESS_TO_DOC_DENIED = 1153
+}

app/src/main/java/com/meloda/fast/api/UserConfig.kt

@@ -0,0 +1,41 @@
+package com.meloda.fast.api
+
+import android.text.TextUtils
+import com.meloda.fast.common.AppGlobal
+
+object UserConfig {
+
+    private const val TOKEN = "token"
+    private const val USER_ID = "user_id"
+
+    const val API_ID = "6964679"
+
+    var token = ""
+    var userId = 0
+
+    fun save() {
+        AppGlobal.preferences.edit()
+            .putString(TOKEN, token)
+            .putInt(USER_ID, userId)
+            .apply()
+    }
+
+    fun restore() {
+        token = AppGlobal.preferences.getString(TOKEN, "")!!
+        userId = AppGlobal.preferences.getInt(USER_ID, -1)
+    }
+
+    fun clear() {
+        token = ""
+        userId = -1
+
+        AppGlobal.preferences.edit()
+            .remove(TOKEN)
+            .remove(USER_ID)
+            .apply()
+    }
+
+    fun isLoggedIn(): Boolean {
+        return userId > 0 && !TextUtils.isEmpty(token)
+    }
+}

app/src/main/java/com/meloda/fast/api/VKApi.kt

@@ -0,0 +1,498 @@
+package com.meloda.fast.api
+
+import android.content.Context
+import android.content.Intent
+import android.util.Log
+import androidx.annotation.WorkerThread
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.activity.DropUserDataActivity
+import com.meloda.fast.api.method.MessageMethodSetter
+import com.meloda.fast.api.method.MethodSetter
+import com.meloda.fast.api.method.UserMethodSetter
+import com.meloda.fast.api.model.*
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.fast.net.HttpRequest
+import org.json.JSONArray
+import org.json.JSONObject
+import java.util.*
+import kotlin.collections.ArrayList
+
+@Suppress("UNCHECKED_CAST")
+object VKApi {
+
+    private const val TAG = "VKM:VKApi"
+
+    const val BASE_URL = "https://api.vk.com/method/"
+
+    const val API_VERSION = "5.132"
+
+    val language: String = AppGlobal.locale.language
+
+    @WorkerThread
+    @Suppress("UNCHECKED_CAST")
+    fun <T> execute(url: String, cls: Class<T>?): ArrayList<T>? {
+        if (BuildConfig.DEBUG) {
+            Log.w(TAG, "url: $url")
+        }
+
+        val buffer = HttpRequest[url].asString()
+        if (BuildConfig.DEBUG) {
+            Log.i(TAG, "response: $buffer")
+        }
+
+        val json = JSONObject(buffer)
+
+        try {
+            checkError(json, url)
+        } catch (ex: VKException) {
+            if (ex.code == ErrorCodes.TOO_MANY_REQUESTS) {
+                Timer().schedule(object : TimerTask() {
+                    override fun run() {
+                        execute(url, cls)
+                    }
+                }, 1000)
+            } else throw ex
+        }
+
+        when (cls) {
+            null -> return null
+
+            VKLongPollServer::class.java -> {
+                json.optJSONObject("response")?.let {
+                    return arrayListOf(VKLongPollServer(it)) as ArrayList<T>?
+                }
+            }
+
+            Boolean::class.java -> {
+                val value = json.optInt("response") == 1
+                return arrayListOf(value) as ArrayList<T>?
+            }
+
+            Long::class.java -> {
+                val value = json.optLong("response")
+                return arrayListOf(value) as ArrayList<T>?
+            }
+
+            Int::class.java -> {
+                val value = json.optInt("response")
+                return arrayListOf(value) as ArrayList<T>?
+            }
+        }
+
+        val response = json.opt("response") ?: return null
+
+        val array = optItems(json) ?: return null
+        val models = ArrayList<T>(array.length())
+
+        when (cls) {
+            VKUser::class.java -> {
+                json.optJSONObject("response")?.let { r ->
+                    VKUser.friendsCount = r.optInt("count")
+                }
+
+                for (i in 0 until array.length()) {
+                    models.add(VKUser(array.optJSONObject(i)) as T)
+                }
+            }
+
+            VKMessage::class.java -> {
+                response as JSONObject
+
+                if (url.contains("messages.getHistory")) {
+                    VKMessage.lastHistoryCount = response.optInt("count")
+
+                    response.optJSONArray("profiles")?.let {
+                        val profiles = arrayListOf<VKUser>()
+
+                        for (j in 0 until it.length()) {
+                            profiles.add(VKUser(it.optJSONObject(j)))
+                        }
+
+                        VKMessage.profiles = profiles
+                    }
+
+                    response.optJSONArray("groups")?.let {
+                        val groups = arrayListOf<VKGroup>()
+
+                        for (j in 0 until it.length()) {
+                            groups.add(VKGroup(it.optJSONObject(j)))
+                        }
+
+                        VKMessage.groups = groups
+                    }
+
+                    response.optJSONArray("conversations")?.let {
+                        val conversations = arrayListOf<VKConversation>()
+
+                        for (j in 0 until it.length()) {
+                            conversations.add(VKConversation(it.optJSONObject(j)))
+                        }
+
+                        VKMessage.conversations = conversations
+                    }
+                }
+
+                for (i in 0 until array.length()) {
+                    var source = array.optJSONObject(i)
+                    if (source.has("message")) {
+                        source = source.optJSONObject("message")
+                    }
+
+                    val message = VKMessage(source)
+                    models.add(message as T)
+                }
+
+                val profiles = ArrayList<VKUser>()
+                response.optJSONArray("profiles")?.let {
+                    profiles.addAll(VKUser.parse(it))
+                }
+
+                val groups = ArrayList<VKGroup>()
+                response.optJSONArray("groups")?.let {
+                    groups.addAll(VKGroup.parse(it))
+                }
+
+                AppGlobal.database.let {
+                    it.users.insert(profiles)
+                    it.groups.insert(groups)
+                }
+            }
+
+            VKGroup::class.java -> {
+                for (i in 0 until array.length()) {
+                    models.add(VKGroup(array.optJSONObject(i)) as T)
+                }
+            }
+
+            VKModel::class.java -> {
+                if (url.contains("messages.getHistoryAttachments")) {
+                    return VKAttachments.parse(array) as ArrayList<T>
+                }
+            }
+
+            VKConversation::class.java -> {
+                if (url.contains("getConversationsById")) {
+                    for (i in 0 until array.length()) {
+                        val source = array.optJSONObject(i)
+                        models.add(VKConversation(source) as T)
+                    }
+
+                    return models
+                }
+
+                json.optJSONObject("response")?.let { r ->
+                    VKConversation.conversationsCount = r.optInt("count")
+                }
+
+                for (i in 0 until array.length()) {
+                    response as JSONObject
+
+                    val source = array.optJSONObject(i)
+                    val oConversation = source.optJSONObject("conversation") ?: return null
+                    val oLastMessage = source.optJSONObject("last_message") ?: return null
+
+                    val conversation = VKConversation(oConversation).also {
+                        it.lastMessage = VKMessage(oLastMessage)
+                    }
+
+                    response.optJSONArray("profiles")?.let {
+                        val profiles = arrayListOf<VKUser>()
+
+                        for (j in 0 until it.length()) {
+                            profiles.add(VKUser(it.optJSONObject(j)))
+                        }
+
+                        VKConversation.profiles = profiles
+                    }
+
+                    response.optJSONArray("groups")?.let {
+                        val groups = arrayListOf<VKGroup>()
+
+                        for (j in 0 until it.length()) {
+                            groups.add(VKGroup(it.optJSONObject(j)))
+                        }
+
+                        VKConversation.groups = groups
+                    }
+
+                    models.add(conversation as T)
+                }
+            }
+        }
+
+        return models
+    }
+
+    fun <E> execute(url: String, cls: Class<E>, listener: OnResponseListener<E>?) {
+        TaskManager.execute {
+            try {
+                val models = execute(url, cls)
+
+                listener?.let {
+                    AppGlobal.handler.post(SuccessCallback(listener, models as E))
+                }
+            } catch (e: Exception) {
+                e.printStackTrace()
+
+                listener?.let {
+                    AppGlobal.handler.post(ErrorCallback(listener, e))
+                }
+            }
+        }
+    }
+
+    fun <E> executeArray(url: String, cls: Class<E>, listener: OnResponseListener<ArrayList<E>>?) {
+        TaskManager.execute {
+            try {
+                val models = execute(url, cls)
+
+                listener?.let {
+                    AppGlobal.handler.post(SuccessArrayCallback(listener, models as ArrayList<E>))
+                }
+            } catch (e: Exception) {
+                e.printStackTrace()
+
+                listener?.let {
+                    AppGlobal.handler.post(ErrorCallback(listener, e))
+                }
+            }
+        }
+    }
+
+    private fun optItems(source: JSONObject): JSONArray? {
+        val response = source.opt("response")
+
+        return when (response) {
+            is JSONArray -> response
+            is JSONObject -> response.optJSONArray("items")
+            else -> null
+        }
+    }
+
+    private fun checkError(json: JSONObject, url: String) {
+        if (json.has("error")) {
+            val error = json.optJSONObject("error") ?: return
+
+            val code = error.optInt("error_code", -1)
+            val message = error.optString("error_msg", "")
+            val e = VKException(url, message, code)
+
+            if (code == 5 && message.contains("invalid session")) {
+//                context?.startActivity(Intent(context, DropUserDataActivity::class.java).apply {
+//                    addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+//                })
+            }
+
+            if (code == ErrorCodes.CAPTCHA_NEEDED) {
+                e.captchaImg = error.optString("captcha_img")
+                e.captchaSid = error.optString("captcha_sid")
+            }
+
+            if (code == ErrorCodes.VALIDATION_REQUIRED) {
+                e.redirectUri = error.optString("redirect_uri")
+            }
+
+            throw e
+        }
+    }
+
+    fun users(): VKUsers {
+        return VKUsers()
+    }
+
+    fun friends(): VKFriends {
+        return VKFriends()
+    }
+
+    fun messages(): VKMessages {
+        return VKMessages()
+    }
+
+    fun groups(): VKGroups {
+        return VKGroups()
+    }
+
+    fun account(): VKAccounts {
+        return VKAccounts()
+    }
+
+    class VKFriends {
+        fun get(): MethodSetter {
+            return MethodSetter("friends.get")
+        }
+    }
+
+    class VKUsers {
+        fun get(): UserMethodSetter {
+            return UserMethodSetter("users.get")
+        }
+    }
+
+    class VKMessages {
+        fun get(): MessageMethodSetter {
+            return MessageMethodSetter("messages.get")
+        }
+
+        fun getConversations(): MessageMethodSetter {
+            return MessageMethodSetter("messages.getConversations")
+        }
+
+        fun getConversationsById(): MessageMethodSetter {
+            return MessageMethodSetter("messages.getConversationsById")
+        }
+
+        fun getById(): MessageMethodSetter {
+            return MessageMethodSetter("messages.getById")
+        }
+
+        fun search(): MessageMethodSetter {
+            return MessageMethodSetter("messages.search")
+        }
+
+        fun getHistory(): MessageMethodSetter {
+            return MessageMethodSetter("messages.getHistory")
+        }
+
+        fun getHistoryAttachments(): MessageMethodSetter {
+            return MessageMethodSetter("messages.getHistoryAttachments")
+        }
+
+        fun send(): MessageMethodSetter {
+            return MessageMethodSetter("messages.send")
+        }
+
+        fun sendSticker(): MessageMethodSetter {
+            return MessageMethodSetter("messages.sendSticker")
+        }
+
+        fun delete(): MessageMethodSetter {
+            return MessageMethodSetter("messages.delete")
+        }
+
+        fun deleteDialog(): MessageMethodSetter {
+            return MessageMethodSetter("messages.deleteDialog")
+        }
+
+        fun restore(): MessageMethodSetter {
+            return MessageMethodSetter("messages.restore")
+        }
+
+        fun markAsRead(): MessageMethodSetter {
+            return MessageMethodSetter("messages.markAsRead")
+        }
+
+        fun markAsImportant(): MessageMethodSetter {
+            return MessageMethodSetter("messages.markAsImportant")
+        }
+
+        fun getLongPollServer(): MessageMethodSetter {
+            return MessageMethodSetter("messages.getLongPollServer")
+        }
+
+        /**
+         * Returns updates in user's private messages.
+         * To speed up handling of private messages,
+         * it can be useful to cache previously loaded messages on
+         * a user's mobile device/desktop, to prevent re-receipt at each call.
+         * With this method, you can synchronize a local copy of
+         * the message list with the actual version.
+         *
+         *
+         * Result:
+         * Returns an object that contains the following fields:
+         * 1 — history:     An array similar to updates field returned
+         * from the Long Poll server,
+         * with these exceptions:
+         * - For events with code 4 (addition of a new message),
+         * there are no fields except the first three.
+         * - There are no events with codes 8, 9 (friend goes online/offline)
+         * or with codes 61, 62 (typing during conversation/chat).
+         *
+         *
+         * 2 — messages:    An array of private message objects that were found
+         * among events with code 4 (addition of a new message)
+         * from the history field.
+         * Each object of message contains a set of fields described here.
+         * The first array element is the total number of messages
+         */
+        fun getLongPollHistory(): MessageMethodSetter {
+            return MessageMethodSetter("messages.getLongPollHistory")
+        }
+
+        fun getChat(): MessageMethodSetter {
+            return MessageMethodSetter("messages.getChat")
+        }
+
+        fun createChat(): MessageMethodSetter {
+            return MessageMethodSetter("messages.createChat")
+        }
+
+        fun editChat(): MessageMethodSetter {
+            return MessageMethodSetter("messages.editChat")
+        }
+
+        val chatUsers: MessageMethodSetter
+            get() = MessageMethodSetter("messages.getChatUsers")
+
+        fun setActivity(): MessageMethodSetter {
+            return MessageMethodSetter("messages.setActivity").type(true)
+        }
+
+        fun addChatUser(): MessageMethodSetter {
+            return MessageMethodSetter("messages.addChatUser")
+        }
+
+        fun removeChatUser(): MessageMethodSetter {
+            return MessageMethodSetter("messages.removeChatUser")
+        }
+    }
+
+    class VKGroups {
+        fun getById(): MethodSetter {
+            return MethodSetter("groups.getById")
+        }
+
+        fun join(): MethodSetter {
+            return MethodSetter("groups.join")
+        }
+    }
+
+    class VKAccounts {
+        fun setOffline(): MethodSetter {
+            return MethodSetter("account.setOffline")
+        }
+
+        fun setOnline(): MethodSetter {
+            return MethodSetter("account.setOnline")
+        }
+    }
+
+    class SuccessCallback<E>(
+        private val listener: OnResponseListener<E>?,
+        private val response: E
+    ) : Runnable {
+        override fun run() {
+            listener?.onResponse(response)
+        }
+    }
+
+    class SuccessArrayCallback<E>(
+        private val listener: OnResponseListener<ArrayList<E>>?,
+        private val response: ArrayList<E>
+    ) : Runnable {
+        override fun run() {
+            listener?.onResponse(response)
+        }
+    }
+
+    class ErrorCallback<E>(
+        private val listener: OnResponseListener<E>?,
+        private val exception: Exception
+    ) : Runnable {
+        override fun run() {
+            listener?.onError(exception)
+        }
+    }
+}

app/src/main/java/com/meloda/fast/api/VKApiKeys.kt

@@ -0,0 +1,15 @@
+package com.meloda.fast.api
+
+enum class VKApiKeys {
+    READ_MESSAGE,
+    RESTORE_MESSAGE,
+    UPDATE_MESSAGE,
+    NEW_MESSAGE,
+    EDIT_MESSAGE,
+    DELETE_MESSAGE,
+    UPDATE_CONVERSATION,
+
+    UPDATE_USER,
+
+    UPDATE_GROUP
+}

app/src/main/java/com/meloda/fast/api/VKAuth.kt

@@ -0,0 +1,59 @@
+package com.meloda.fast.api
+
+import android.util.Log
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.api.util.VKUtil
+import java.net.URLEncoder
+
+object VKAuth {
+
+    private const val TAG = "VKM.VKAuth"
+
+    var redirectUrl = "https://oauth.vk.com/blank.html"
+
+    fun getDirectAuthUrl(login: String, password: String, captcha: String = ""): String {
+        return "https://oauth.vk.com/token?grant_type=password&" +
+                "client_id=2274003&" +
+                "scope=notify,friends,photos,audio,video,docs,notes,pages,status,offers,questions,wall,groups,messages,email,notifications,stats,ads,market,offline&" +
+                "client_secret=hHbZxrka2uZ6jB1inYsH&" +
+                "username=$login&" +
+                "password=$password" +
+                (if (captcha.isEmpty()) "" else "&$captcha") +
+                "&v=${VKApi.API_VERSION}"
+    }
+
+    fun getUrl(api_id: String, settings: String): String {
+        return "https://oauth.vk.com/authorize?" +
+                "client_id=$api_id&" +
+                "display=mobile&" +
+                "scope=$settings&" +
+                "redirect_uri=${
+                    URLEncoder.encode(
+                        redirectUrl,
+                        "utf-8"
+                    )
+                }&" +
+                "response_type=token&" +
+                "v=${URLEncoder.encode(VKApi.API_VERSION, "utf-8")}"
+    }
+
+    const val settings =
+        "notify,friends,photos,audio,video,docs,status,notes,pages,wall,groups,messages,offline,notifications"
+
+    @Throws(Exception::class)
+    fun parseRedirectUrl(url: String): Array<String> {
+        val accessToken = VKUtil.extractPattern(url, "access_token=(.*?)&")
+        val userId = VKUtil.extractPattern(url, "user_id=(\\d*)")
+
+        if (BuildConfig.DEBUG) {
+            Log.i(TAG, "access_token=$accessToken")
+            Log.i(TAG, "user_id=$userId")
+        }
+
+        if (userId == null || userId.isEmpty() || accessToken == null || accessToken.isEmpty()) throw Exception(
+            "Failed to parse redirect url $url"
+        )
+
+        return arrayOf(accessToken, userId)
+    }
+}

app/src/main/java/com/meloda/fast/api/VKException.kt

@@ -0,0 +1,15 @@
+package com.meloda.fast.api
+
+import java.io.IOException
+
+class VKException(var url: String, override var message: String, var code: Int) :
+    IOException(message) {
+    var captchaSid: String? = null
+    var captchaImg: String? = null
+    var redirectUri: String? = null
+
+    override fun toString(): String {
+        return "code: $code, message: $message"
+    }
+
+}

app/src/main/java/com/meloda/fast/api/VKLongPollParser.kt

@@ -0,0 +1,146 @@
+package com.meloda.fast.api
+
+import android.util.Log
+import androidx.annotation.WorkerThread
+import com.meloda.fast.api.model.VKMessage
+import com.meloda.fast.api.util.VKUtil
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.event.EventInfo
+import org.json.JSONArray
+
+@Suppress("UNCHECKED_CAST")
+class VKLongPollParser {
+
+    companion object {
+
+        @WorkerThread
+        fun parse(updates: JSONArray) {
+            if (updates.length() == 0) {
+                return
+            }
+
+            for (i in 0 until updates.length()) {
+                val item = updates.optJSONArray(i)
+                when (item.optInt(0)) {
+                    2 -> messageSetFlags(item)
+                    3 -> messageClearFlags(item)
+                    4 -> messageEvent(item)
+                    5 -> messageEdit(item)
+                }
+            }
+        }
+
+        private const val TAG = "VKLongPollParser"
+
+        private fun messageEvent(item: JSONArray) {
+            val message = VKUtil.parseLongPollMessage(item)
+
+            TaskManager.execute {
+                if (message.isFromUser()) {
+                    VKUtil.searchUser(message.fromId)?.let { message.fromUser = it }
+                } else {
+                    VKUtil.searchGroup(message.fromId)?.let { message.fromGroup = it }
+                }
+
+                MemoryCache.getConversationById(message.peerId)?.let {
+                    it.lastMessage = message
+                    it.lastMessageId = message.messageId
+
+                    MemoryCache.put(it)
+                }
+
+                MemoryCache.put(message)
+
+                val info = EventInfo(VKApiKeys.NEW_MESSAGE, message)
+
+                sendEvent(info)
+            }
+        }
+
+        private fun messageEdit(item: JSONArray) {
+            val message = VKUtil.parseLongPollMessage(item)
+            val info = EventInfo(VKApiKeys.EDIT_MESSAGE, message)
+
+            MemoryCache.put(message)
+
+            sendEvent(info)
+        }
+
+        private fun messageDelete(item: JSONArray) {
+            val messageId = item.optInt(1)
+            val peerId = item.optInt(3)
+            val info = EventInfo(VKApiKeys.DELETE_MESSAGE, arrayOf(peerId, messageId))
+
+            MemoryCache.deleteMessage(messageId)
+
+            sendEvent(info)
+        }
+
+        private fun messageRestored(item: JSONArray) {
+            val message = VKUtil.parseLongPollMessage(item)
+            val info = EventInfo(VKApiKeys.RESTORE_MESSAGE, message)
+
+            MemoryCache.put(message)
+
+            sendEvent(info)
+        }
+
+        private fun messageRead(item: JSONArray) {
+            val messageId = item.optInt(1)
+            val peerId = item.optInt(3)
+            val info = EventInfo(VKApiKeys.READ_MESSAGE, arrayOf(peerId, messageId))
+
+            MemoryCache.edit(MemoryCache.getMessageById(messageId)?.apply { isRead = true })
+
+            sendEvent(info)
+        }
+
+        private fun messageClearFlags(item: JSONArray) {
+            val id = item.optInt(1)
+            val flags = item.optInt(2)
+            if (VKUtil.isMessageHasFlag(flags, "cancel_spam")) {
+                Log.i(TAG, "Message with id $id: Not spam")
+            }
+            if (VKUtil.isMessageHasFlag(flags, "deleted")) {
+                messageRestored(item)
+            }
+            if (VKUtil.isMessageHasFlag(flags, "important")) {
+                Log.i(TAG, "Message with id $id: Not Important")
+            }
+            if (VKUtil.isMessageHasFlag(flags, "unread")) {
+                messageRead(item)
+            }
+        }
+
+        private fun messageSetFlags(item: JSONArray) {
+            val id = item.optInt(1)
+            val flags = item.optInt(2)
+            if (VKUtil.isMessageHasFlag(flags, "delete_for_all")) {
+                messageDelete(item)
+            }
+            if (VKUtil.isMessageHasFlag(flags, "deleted")) {
+                messageDelete(item)
+            }
+            if (VKUtil.isMessageHasFlag(flags, "spam")) {
+                Log.i(TAG, "Message with id $id: Spam")
+            }
+            if (VKUtil.isMessageHasFlag(flags, "important")) {
+                Log.i(TAG, "Message with id $id: Important")
+            }
+        }
+
+        private fun sendEvent(eventInfo: EventInfo<*>) {
+            TaskManager.sendEvent(eventInfo)
+        }
+    }
+
+    interface OnMessagesListener {
+        fun onNewMessage(message: VKMessage)
+        fun onEditMessage(message: VKMessage)
+        fun onReadMessage(messageId: Int, peerId: Int)
+        fun onDeleteMessage(messageId: Int, peerId: Int)
+        fun onRestoredMessage(message: VKMessage)
+    }
+
+}

app/src/main/java/com/meloda/fast/api/method/MessageMethodSetter.kt

@@ -0,0 +1,205 @@
+package com.meloda.fast.api.method
+
+import com.meloda.fast.util.ArrayUtils
+
+class MessageMethodSetter(name: String) : MethodSetter(name) {
+
+    fun out(value: Boolean): MessageMethodSetter {
+        put("out", value)
+        return this
+    }
+
+    fun timeOffset(value: Int): MessageMethodSetter {
+        put("time_offset", value)
+        return this
+    }
+
+    fun filters(value: Int): MessageMethodSetter {
+        put("filters", value)
+        return this
+    }
+
+    fun previewLength(value: Int): MessageMethodSetter {
+        put("preview_length", value)
+        return this
+    }
+
+    fun lastMessageId(value: Int): MessageMethodSetter {
+        put("last_message_id", value)
+        return this
+    }
+
+    fun unread(value: Boolean): MessageMethodSetter {
+        put("unread", value)
+        return this
+    }
+
+    fun messageIds(vararg ids: Int): MessageMethodSetter {
+        put("message_ids", ArrayUtils.asString(ids))
+        return this
+    }
+
+    fun messageIds(ids: ArrayList<Int>): MessageMethodSetter {
+        put("message_ids", ArrayUtils.asString(ids))
+        return this
+    }
+
+    fun q(query: String): MessageMethodSetter {
+        put("q", query)
+        return this
+    }
+
+    fun startMessageId(id: Int): MessageMethodSetter {
+        put("start_message_id", id)
+        return this
+    }
+
+    fun peerId(value: Int): MessageMethodSetter {
+        put("peer_id", value)
+        return this
+    }
+
+    fun peerIds(vararg values: Int): MessageMethodSetter {
+        put("peer_ids", ArrayUtils.asString(values))
+        return this
+    }
+
+    fun reversed(value: Boolean): MessageMethodSetter {
+        put("rev", value)
+        return this
+    }
+
+    fun domain(value: String): MessageMethodSetter {
+        put("domain", value)
+        return this
+    }
+
+    fun chatId(value: Int): MessageMethodSetter {
+        put("chat_id", value)
+        return this
+    }
+
+    fun message(message: String): MessageMethodSetter {
+        put("message", message)
+        return this
+    }
+
+    fun randomId(value: Int): MessageMethodSetter {
+        put("random_id", value)
+        return this
+    }
+
+    fun lat(lat: Double): MessageMethodSetter {
+        put("lat", lat)
+        return this
+    }
+
+    fun longitude(value: Long): MessageMethodSetter {
+        put("LONG", value)
+        return this
+    }
+
+    fun attachment(attachments: Collection<String>): MessageMethodSetter {
+        put("attachment", ArrayUtils.asString(attachments))
+        return this
+    }
+
+    fun attachment(vararg attachments: String): MessageMethodSetter {
+        put("attachment", ArrayUtils.asString(*attachments))
+        return this
+    }
+
+    fun forwardMessages(ids: Collection<String>): MessageMethodSetter {
+        put("forward_messages", ArrayUtils.asString(ids))
+        return this
+    }
+
+    fun forwardMessages(vararg ids: Int): MessageMethodSetter {
+        put("forward_messages", ArrayUtils.asString(ids))
+        return this
+    }
+
+    fun stickerId(value: Int): MessageMethodSetter {
+        put("sticker_id", value)
+        return this
+    }
+
+    fun messageId(value: Int): MessageMethodSetter {
+        put("message_id", value)
+        return this
+    }
+
+    fun important(value: Boolean): MessageMethodSetter {
+        put("important", value)
+        return this
+    }
+
+    fun ts(value: Long): MessageMethodSetter {
+        put("ts", value)
+        return this
+    }
+
+    fun pts(value: Int): MessageMethodSetter {
+        put("pts", value)
+        return this
+    }
+
+    fun msgsLimit(limit: Int): MessageMethodSetter {
+        put("msgs_limit", limit)
+        return this
+    }
+
+    fun onlines(onlines: Boolean): MessageMethodSetter {
+        put("onlines", onlines)
+        return this
+    }
+
+    fun maxMsgId(id: Int): MessageMethodSetter {
+        put("max_msg_id", id)
+        return this
+    }
+
+    fun chatIds(vararg ids: Int): MessageMethodSetter {
+        put("max_msg_id", ArrayUtils.asString(ids))
+        return this
+    }
+
+    fun chatIds(ids: Collection<Int>): MessageMethodSetter {
+        put("max_msg_id", ArrayUtils.asString(ids))
+        return this
+    }
+
+    fun title(title: String): MessageMethodSetter {
+        put("title", title)
+        return this
+    }
+
+    fun type(typing: Boolean): MessageMethodSetter {
+        if (typing) {
+            put("type", "typing")
+        }
+        return this
+    }
+
+    fun mediaType(type: String): MessageMethodSetter {
+        put("media_type", type)
+        return this
+    }
+
+    fun photoSizes(value: Boolean): MessageMethodSetter {
+        return put("photo_sizes", value) as MessageMethodSetter
+    }
+
+    fun filter(value: String): MessageMethodSetter {
+        return put("filter", value) as MessageMethodSetter
+    }
+
+    fun extended(value: Boolean): MessageMethodSetter {
+        return put("extended", value) as MessageMethodSetter
+    }
+
+    fun markConversationAsRead(asRead: Boolean): MessageMethodSetter {
+        put("mark_conversation_as_read", asRead)
+        return this
+    }
+}

app/src/main/java/com/meloda/fast/api/method/MethodSetter.kt

@@ -0,0 +1,166 @@
+package com.meloda.fast.api.method
+
+import android.util.ArrayMap
+import android.util.Log
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.api.VKApi
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.fast.util.ArrayUtils
+import java.net.URLEncoder
+
+@Suppress("UNCHECKED_CAST")
+open class MethodSetter(private val name: String) {
+
+    private val params: ArrayMap<String, String> = ArrayMap()
+
+    fun put(key: String, value: Any): MethodSetter {
+        params[key] = value.toString()
+        return this
+    }
+
+    fun put(key: String, value: String): MethodSetter {
+        params[key] = value
+        return this
+    }
+
+    fun put(key: String, value: Int): MethodSetter {
+        params[key] = value.toString()
+        return this
+    }
+
+    fun put(key: String, value: Long): MethodSetter {
+        params[key] = value.toString()
+        return this
+    }
+
+    fun put(key: String, value: Boolean): MethodSetter {
+        params[key] = if (value) "1" else "0"
+        return this
+    }
+
+    private fun getSignedUrl(): String {
+        if (!params.containsKey("access_token")) {
+            params["access_token"] = UserConfig.token
+        }
+
+        if (!params.containsKey("v")) {
+            params["v"] = VKApi.API_VERSION
+        }
+
+        if (!params.containsKey("lang")) {
+            params["lang"] = VKApi.language
+        }
+
+        return "${VKApi.BASE_URL}$name?${retrieveParams()}"
+    }
+
+    private fun retrieveParams(): String {
+        val builder = StringBuilder()
+
+        for (i in 0 until params.size) {
+            val key = params.keyAt(i)
+            val value = params.valueAt(i)
+
+            if (builder.isNotEmpty()) {
+                builder.append("&")
+            }
+
+            builder.append(key)
+            builder.append("=")
+            builder.append(URLEncoder.encode(value, "UTF-8"))
+        }
+
+        val params = builder.toString()
+
+        if (BuildConfig.DEBUG) {
+            Log.i("MethodSetter", "retrieved params: $params")
+        }
+
+        return params
+    }
+
+    fun <E> execute(cls: Class<E>): ArrayList<E>? {
+        return VKApi.execute(getSignedUrl(), cls)
+    }
+
+    fun <E> executeArray(cls: Class<E>, listener: OnResponseListener<ArrayList<E>>?) {
+        VKApi.executeArray(getSignedUrl(), cls, listener)
+    }
+
+    fun <E> execute(cls: Class<E>, listener: OnResponseListener<E>?) {
+        VKApi.execute(getSignedUrl(), cls, listener)
+    }
+
+    fun userId(value: Int): MethodSetter {
+        return put("user_id", value)
+    }
+
+    fun userIds(vararg ids: Int): MethodSetter {
+        return put("user_ids", ArrayUtils.asString(ids))
+    }
+
+    fun userIds(ids: ArrayList<Int>): MethodSetter {
+        return put("user_ids", ArrayUtils.asString(ids))
+    }
+
+    fun ownerId(value: Int): MethodSetter {
+        return put("owner_id", value)
+    }
+
+    fun groupId(value: Int): MethodSetter {
+        return put("group_id", value)
+    }
+
+    fun groupIds(vararg ids: Int): MethodSetter {
+        return put("group_ids", ArrayUtils.asString(ids))
+    }
+
+    fun groupIds(ids: ArrayList<Int>): MethodSetter {
+        return put("group_ids", ArrayUtils.asString(ids))
+    }
+
+    fun fields(values: String): MethodSetter {
+        return put("fields", values)
+    }
+
+    fun count(value: Int): MethodSetter {
+        return put("count", value)
+    }
+
+    fun sort(value: Int): MethodSetter {
+        put("sort", value)
+        return this
+    }
+
+    /**
+     *
+     * hints — сортировать по рейтингу, аналогично тому, как друзья сортируются в разделе Мои друзья
+     * random — возвращает друзей в случайном порядке.
+     * mobile — возвращает выше тех друзей, у которых установлены мобильные приложения.
+     * name — сортировать по имени (долго)
+     *
+     */
+
+    fun order(value: String): MethodSetter {
+        put("order", value)
+        return this
+    }
+
+    fun offset(value: Int = 0): MethodSetter {
+        return put("offset", value)
+    }
+
+    fun nameCase(value: String): MethodSetter {
+        return put("name_case", value)
+    }
+
+    fun captchaSid(value: String): MethodSetter {
+        return put("captcha_sid", value)
+    }
+
+    fun captchaKey(value: String): MethodSetter {
+        return put("captcha_key", value)
+    }
+
+}

app/src/main/java/com/meloda/fast/api/method/UserMethodSetter.kt

@@ -0,0 +1,44 @@
+package com.meloda.fast.api.method
+
+class UserMethodSetter(name: String) : MethodSetter(name) {
+
+    fun extended(extended: Boolean): UserMethodSetter {
+        put("extended", extended)
+        return this
+    }
+
+    fun type(type: String): UserMethodSetter {
+        put("type", type)
+        return this
+    }
+
+    fun comment(comment: String): UserMethodSetter {
+        put("comment", comment)
+        return this
+    }
+
+    fun latitude(latitude: Float): UserMethodSetter {
+        put("latitude", latitude)
+        return this
+    }
+
+    fun longitude(longitude: Float): UserMethodSetter {
+        put("longitude", longitude)
+        return this
+    }
+
+    fun accuracy(accuracy: Int): UserMethodSetter {
+        put("accuracy", accuracy)
+        return this
+    }
+
+    fun timeout(timeout: Int): UserMethodSetter {
+        put("timeout", timeout)
+        return this
+    }
+
+    fun radius(radius: Int): UserMethodSetter {
+        put("radius", radius)
+        return this
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKAttachments.kt

@@ -0,0 +1,59 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONArray
+import java.util.*
+
+object VKAttachments {
+
+    private const val TYPE_PHOTO = "photo"
+    private const val TYPE_VIDEO = "video"
+    private const val TYPE_AUDIO = "audio"
+    private const val TYPE_DOC = "doc"
+    private const val TYPE_LINK = "link"
+    private const val TYPE_STICKER = "sticker"
+    private const val TYPE_GIFT = "gift"
+    private const val TYPE_AUDIO_MESSAGE = "audio_message"
+    private const val TYPE_GRAFFITI = "graffiti"
+    private const val TYPE_POLL = "poll"
+    private const val TYPE_GEO = "geo"
+    private const val TYPE_WALL = "wall"
+    private const val TYPE_CALL = "call"
+    private const val TYPE_STORY = "story"
+    private const val TYPE_POINT = "point"
+    private const val TYPE_MARKET = "market"
+    private const val TYPE_ARTICLE = "article"
+    private const val TYPE_PODCAST = "podcast"
+    private const val TYPE_WALL_REPLY = "wall_reply"
+    private const val TYPE_MONEY_REQUEST = "money_request"
+    private const val TYPE_AUDIO_PLAYLIST = "audio_playlist"
+
+    fun parse(array: JSONArray): ArrayList<VKModel> {
+        val attachments = ArrayList<VKModel>(array.length())
+
+        for (i in 0 until array.length()) {
+            var attachment = array.optJSONObject(i) ?: continue
+            if (attachment.has("attachment")) {
+                attachment = attachment.optJSONObject("attachment") ?: continue
+            }
+
+            val type = attachment.optString("type")
+            val jsonObject = attachment.optJSONObject(type) ?: continue
+
+            when (type) {
+                TYPE_PHOTO -> attachments.add(VKPhoto(jsonObject))
+                TYPE_AUDIO -> attachments.add(VKAudio(jsonObject))
+                TYPE_VIDEO -> attachments.add(VKVideo(jsonObject))
+                TYPE_DOC -> attachments.add(VKDoc(jsonObject))
+                TYPE_STICKER -> attachments.add(VKSticker(jsonObject))
+                TYPE_LINK -> attachments.add(VKLink(jsonObject))
+                TYPE_GIFT -> attachments.add(VKGift(jsonObject))
+                TYPE_AUDIO_MESSAGE -> attachments.add(VKAudioMessage(jsonObject))
+                TYPE_GRAFFITI -> attachments.add(VKGraffiti(jsonObject))
+                TYPE_POLL -> attachments.add(VKPoll(jsonObject))
+                TYPE_CALL -> attachments.add(VKCall(jsonObject))
+            }
+        }
+
+        return attachments
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKAudio.kt

@@ -0,0 +1,17 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+
+class VKAudio(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var id = o.optInt("id", -1)
+    var ownerId = o.optInt("owner_id", -1)
+    var artist: String = o.optString("artist")
+    var title: String = o.optString("title")
+    var duration = o.optInt("duration")
+    var url: String = o.optString("url")
+    var date = o.optInt("date")
+
+}

app/src/main/java/com/meloda/fast/api/model/VKAudioMessage.kt

@@ -0,0 +1,23 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+
+class VKAudioMessage(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var duration = o.optInt("duration")
+    var waveform = ArrayList<Int>()
+    var linkOgg: String = o.optString("link_ogg")
+    var linkMp3: String = o.optString("link_mp3")
+
+    init {
+        o.optJSONArray("waveform")?.let {
+            val waveform = ArrayList<Int>()
+            for (i in 0 until it.length()) {
+                waveform.add(it.optInt(i))
+            }
+            this.waveform = waveform
+        }
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKCall.kt

@@ -0,0 +1,15 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+
+class VKCall(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var initiatorId = o.optInt("initiator_id", -1)
+    var receiverId = o.optInt("receiver_id", -1)
+    var state: String = o.optString("state") //reached, canceled_by_initiator, canceled_by_receiver
+    var time = o.optInt("time")
+    var duration = o.optInt("duration")
+
+}

app/src/main/java/com/meloda/fast/api/model/VKComment.kt

@@ -0,0 +1,4 @@
+package com.meloda.fast.api.model
+
+class VKComment { //https://vk.com/dev/objects/comment
+}

app/src/main/java/com/meloda/fast/api/model/VKConversation.kt

@@ -0,0 +1,144 @@
+package com.meloda.fast.api.model
+
+import androidx.room.Embedded
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import androidx.room.RoomWarnings
+import org.json.JSONObject
+
+@SuppressWarnings(RoomWarnings.PRIMARY_KEY_FROM_EMBEDDED_IS_DROPPED)
+@Entity(tableName = "conversations")
+class VKConversation() : VKModel(), Cloneable {
+
+    companion object {
+        var profiles = arrayListOf<VKUser>()
+        var groups = arrayListOf<VKGroup>()
+
+        var conversationsCount: Int = 0
+
+        const val STATE_IN = "in"
+        const val STATE_KICKED = "kicked"
+        const val STATE_LEFT = "left"
+
+        const val TYPE_USER = "user"
+        const val TYPE_CHAT = "chat"
+        const val TYPE_GROUP = "group"
+
+        var count = 0
+    }
+
+    /*
+           18 — пользователь заблокирован или удален;
+           900 — нельзя отправить сообщение пользователю, который в чёрном списке;
+           901 — пользователь запретил сообщения от сообщества;
+           902 — пользователь запретил присылать ему сообщения с помощью настроек приватности;
+           915 — в сообществе отключены сообщения;
+           916 — в сообществе заблокированы сообщения;
+           917 — нет доступа к чату;
+           918 — нет доступа к e-mail;
+           203 — нет доступа к сообществу
+       */
+
+    var isAllowed = false
+    var reason = -1
+
+    var inRead = 0
+    var outRead = 0
+    var lastMessageId = 0
+    var unreadCount = 0
+
+    @PrimaryKey(autoGenerate = false)
+    var conversationId = 0
+
+    var type: String = ""
+    var localId = 0
+
+    var disabledUntil = 0
+    var isDisabledForever = false
+    var isNoSound = false
+
+    var membersCount = 0
+    var title: String = ""
+
+    var pinnedMessageId = 0
+
+    var state: String = ""
+
+    @Embedded(prefix = "cMessage")
+    var lastMessage = VKMessage()
+
+    var isGroupChannel = false
+
+    var photo50: String = ""
+    var photo100: String = ""
+    var photo200: String = ""
+
+    @Embedded(prefix = "cUser")
+    var peerUser: VKUser? = null
+
+    @Embedded(prefix = "cGroup")
+    var peerGroup: VKGroup? = null
+
+    constructor(o: JSONObject) : this() {
+        inRead = o.optInt("in_read")
+        outRead = o.optInt("out_read")
+        lastMessageId = o.optInt("last_message_id", -1)
+        unreadCount = o.optInt("unread_count", 0)
+
+        o.optJSONObject("peer")?.let {
+            conversationId = it.optInt("id", -1)
+            type = it.optString("type")
+            localId = it.optInt("local_id")
+        }
+
+        o.optJSONObject("push_settings")?.let {
+            disabledUntil = it.optInt("disabled_until")
+            isDisabledForever = it.optBoolean("disabled_forever")
+            isNoSound = it.optBoolean("no_sound")
+        }
+
+        o.optJSONObject("can_write")?.let {
+            isAllowed = it.optBoolean("allowed")
+            reason = it.optInt("reason", -1)
+        }
+
+        o.optJSONObject("chat_settings")?.let {
+            membersCount = it.optInt("members_count")
+            title = it.optString("title")
+
+            it.optJSONObject("pinned_message")?.let { pinned ->
+                pinnedMessageId = VKPinnedMessage(pinned).id
+            }
+
+            state = it.optString("state")
+
+            it.optJSONObject("photo")?.let { photo ->
+                photo50 = photo.optString("photo_50")
+                photo100 = photo.optString("photo_100")
+                photo200 = photo.optString("photo_200")
+            }
+
+            isGroupChannel = it.optBoolean("is_group_channel")
+        }
+    }
+
+    fun isNotificationsDisabled() = (isDisabledForever || disabledUntil > 0 || isNoSound)
+
+    fun isChatId() = conversationId > 2_000_000_000
+
+    fun isChat() = type == TYPE_CHAT
+
+    fun isUser() = type == TYPE_USER
+
+    fun isNotUser() = !isUser()
+
+    fun isGroup() = type == TYPE_GROUP
+
+    override fun toString(): String {
+        return title
+    }
+
+    public override fun clone(): VKConversation {
+        return super.clone() as VKConversation
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKDoc.kt

@@ -0,0 +1,73 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+import java.util.*
+
+class VKDoc(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    companion object {
+        const val TYPE_NONE = 0
+        const val TYPE_TEXT = 1
+        const val TYPE_ARCHIVE = 2
+        const val TYPE_GIF = 3
+        const val TYPE_IMAGE = 4
+        const val TYPE_AUDIO = 5
+        const val TYPE_VIDEO = 6
+        const val TYPE_BOOK = 7
+        const val TYPE_UNKNOWN = 8
+    }
+
+    var id = o.optInt("id", -1)
+    var ownerId = o.optInt("owner_id", -1)
+    var title: String = o.optString("title")
+    var size = o.optInt("size")
+    var ext: String = o.optString("ext")
+    var url: String = o.optString("url")
+    var date = o.optInt("date")
+    var type = o.optInt("type")
+    var preview: Preview? = null
+
+    init {
+        o.optJSONObject("preview")?.let {
+            preview = Preview(it)
+        }
+    }
+
+    class Preview(o: JSONObject) {
+        var photo: Photo? = null
+        var graffiti: Graffiti? = null
+
+        inner class Photo(o: JSONObject) {
+            var sizes: ArrayList<VKPhotoSize>? = null
+
+            init {
+                o.optJSONArray("sizes")?.let {
+                    val sizes = ArrayList<VKPhotoSize>()
+                    for (i in 0 until it.length()) {
+                        sizes.add(VKPhotoSize(it.optJSONObject(i)))
+                    }
+                    this.sizes = sizes
+                }
+            }
+        }
+
+        class Graffiti(o: JSONObject) {
+            var src: String = o.optString("src")
+            var width = o.optInt("width")
+            var height = o.optInt("height")
+        }
+
+        init {
+            o.optJSONObject("photo")?.let {
+                photo = Photo(it)
+            }
+
+            o.optJSONObject("graffiti")?.let {
+                graffiti = Graffiti(it)
+            }
+
+        }
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKFriend.kt

@@ -0,0 +1,18 @@
+package com.meloda.fast.api.model
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "friends")
+class VKFriend() {
+
+    @PrimaryKey(autoGenerate = false)
+    var friendId: Int = -1
+
+    var userId: Int = -1
+
+    constructor(friendId: Int, userId: Int) : this() {
+        this.friendId = friendId
+        this.userId = userId
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKGift.kt

@@ -0,0 +1,14 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+
+class VKGift(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var id = o.optInt("id", -1)
+    var thumb256: String = o.optString("thumb_256")
+    var thumb96: String = o.optString("thumb_96")
+    var thumb48: String = o.optString("thumb_48")
+
+}

app/src/main/java/com/meloda/fast/api/model/VKGraffiti.kt

@@ -0,0 +1,16 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+
+class VKGraffiti(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var id = o.optInt("id", -1)
+    var ownerId = o.optInt("owner_id", -1)
+    var url: String = o.optString("url")
+    var width = o.optInt("width")
+    var height = o.optInt("height")
+    var accessKey: String = o.optString("access_key")
+
+}

app/src/main/java/com/meloda/fast/api/model/VKGroup.kt

@@ -0,0 +1,46 @@
+package com.meloda.fast.api.model
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import org.json.JSONArray
+import org.json.JSONObject
+
+@Entity(tableName = "groups")
+open class VKGroup(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    companion object {
+        const val DEFAULT_FIELDS = "description,members_count,counters,status,verified"
+
+        fun isGroupId(id: Int): Boolean {
+            return id < 0
+        }
+
+        val EMPTY: VKGroup = object : VKGroup() {
+            init {
+                name = "Unknown"
+            }
+        }
+
+        fun parse(array: JSONArray): ArrayList<VKGroup> {
+            val groups = ArrayList<VKGroup>()
+
+            for (i in 0 until array.length()) {
+                groups.add(VKGroup(array.optJSONObject(i)))
+            }
+            return groups
+        }
+    }
+
+    @PrimaryKey(autoGenerate = false)
+    var groupId = o.optInt("id", -1)
+    var name: String = o.optString("name")
+    var screenName: String = o.optString("screen_name")
+    var isClosed = o.optInt("is_closed") == 1
+    var deactivated: String = o.optString("deactivated")
+    var type: String = o.optString("type")
+    var photo50: String = o.optString("photo_50")
+    var photo100: String = o.optString("photo_100")
+    var photo200: String = o.optString("photo_200")
+}

app/src/main/java/com/meloda/fast/api/model/VKLink.kt

@@ -0,0 +1,46 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+import java.io.Serializable
+
+class VKLink(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var url: String = o.optString("url")
+    var title: String = o.optString("title")
+    var caption: String = o.optString("caption")
+    var description: String = o.optString("description")
+    var previewPage: String = o.optString("preview_page")
+    var previewUrl: String = o.optString("preview_url")
+    var photo: VKPhoto? = null
+    var button: Button? = null
+
+    init {
+        o.optJSONObject("photo")?.let {
+            photo = VKPhoto(it)
+        }
+
+        o.optJSONObject("button")?.let {
+            button = Button(it)
+        }
+    }
+
+    class Button(o: JSONObject) : Serializable {
+        var title: String = o.optString("title")
+        var action: Action? = null
+
+        init {
+            o.optJSONObject("action")?.let {
+                action = Action(it)
+            }
+        }
+
+        class Action(o: JSONObject) : Serializable {
+
+            var type: String = o.optString("type")
+            var url: String = o.optString("url")
+
+        }
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKLongPollHistory.kt

@@ -0,0 +1,12 @@
+package com.meloda.fast.api.model
+
+import java.util.*
+
+class VKLongPollHistory : VKModel() {
+
+    private val lpMessages: ArrayList<VKMessage>? = null
+    private val messages: ArrayList<VKMessage>? = null
+    private val profiles: ArrayList<VKUser>? = null
+    private val groups: ArrayList<VKGroup>? = null //TODO: использовать
+
+}

app/src/main/java/com/meloda/fast/api/model/VKLongPollServer.kt

@@ -0,0 +1,13 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+
+class VKLongPollServer(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var key: String = o.optString("key")
+    var server = o.optString("server").replace("\\", "")
+    var ts: Long = o.optLong("ts")
+
+}

app/src/main/java/com/meloda/fast/api/model/VKMarketAlbum.kt

@@ -0,0 +1,4 @@
+package com.meloda.fast.api.model
+
+class VKMarketAlbum { //https://vk.com/dev/objects/market_album
+}

app/src/main/java/com/meloda/fast/api/model/VKMarketItem.kt

@@ -0,0 +1,4 @@
+package com.meloda.fast.api.model
+
+class VKMarketItem { //https://vk.com/dev/objects/market_item
+}

app/src/main/java/com/meloda/fast/api/model/VKMessage.kt

@@ -0,0 +1,177 @@
+package com.meloda.fast.api.model
+
+import android.util.ArrayMap
+import androidx.room.*
+import com.meloda.fast.database.dao.converters.ArrayListToByteArrayConverter
+import com.meloda.fast.database.dao.converters.ForwardedConverter
+import org.json.JSONObject
+
+@SuppressWarnings(RoomWarnings.PRIMARY_KEY_FROM_EMBEDDED_IS_DROPPED)
+@Entity(tableName = "messages")
+open class VKMessage() : VKModel() {
+
+    companion object {
+
+        var profiles = arrayListOf<VKUser>()
+        var groups = arrayListOf<VKGroup>()
+        var conversations = arrayListOf<VKConversation>()
+
+        const val serialVersionUID = 1L
+
+        var lastHistoryCount = 0
+
+        const val UNREAD = 1 // Оно просто есть
+        const val OUTBOX = 1 shl 1 // Исходящее сообщение
+        const val REPLIED = 1 shl 2 // На сообщение был создан ответ
+        const val IMPORTANT = 1 shl 3 // Важное сообщение
+        const val FRIENDS = 1 shl 5 // Сообщение в чат друга
+        const val SPAM = 1 shl 6 // Сообщение помечено как спам
+        const val DELETED = 1 shl 7 // Удаление сообщения
+        const val AUDIO_LISTENED = 1 shl 12 // ГС прослушано
+        const val CHAT = 1 shl 13 // Сообщение отправлено в беседу
+        const val CANCEL_SPAM = 1 shl 15 // Отмена пометки спама
+        const val HIDDEN = 1 shl 16 // Приветственное сообщение сообщества
+        const val DELETE_FOR_ALL = 1 shl 17 // Сообщение удалено для всех
+        const val CHAT_IN = 1 shl 19 // Входящее сообщение в беседе
+        const val REPLY_MSG = 1 shl 21 // Ответ на сообщение
+
+        val flags = ArrayMap<String, Int>()
+
+        fun isOut(flags: Int): Boolean {
+            return OUTBOX and flags > 0
+        }
+
+        fun isDeleted(flags: Int): Boolean {
+            return DELETED and flags > 0
+        }
+
+        fun isUnread(flags: Int): Boolean {
+            return UNREAD and flags > 0
+        }
+
+        fun isSpam(flags: Int): Boolean {
+            return SPAM and flags > 0
+        }
+
+        fun isCanceledSpam(flags: Int): Boolean {
+            return CANCEL_SPAM and flags > 0
+        }
+
+        fun isImportant(flags: Int): Boolean {
+            return IMPORTANT and flags > 0
+        }
+
+        fun isDeletedForAll(flags: Int): Boolean {
+            return DELETE_FOR_ALL and flags > 0
+        }
+
+        init {
+            flags["unread"] = UNREAD
+            flags["outbox"] = OUTBOX
+            flags["replied"] = REPLIED
+            flags["important"] = IMPORTANT
+            flags["friends"] = FRIENDS
+            flags["spam"] = SPAM
+            flags["deleted"] = DELETED
+            flags["audio_listened"] = AUDIO_LISTENED
+            flags["chat"] = CHAT
+            flags["cancel_spam"] = CANCEL_SPAM
+            flags["hidden"] = HIDDEN
+            flags["delete_for_all"] = DELETE_FOR_ALL
+            flags["chat_in"] = CHAT_IN
+            flags["reply_msg"] = REPLY_MSG
+        }
+    }
+
+    @PrimaryKey(autoGenerate = false)
+    var messageId = 0
+    var date = 0
+    var peerId = 0
+    var fromId = 0
+    var editTime = 0
+    var isOut = false
+    var text: String = ""
+    var randomId = 0
+    var conversationMessageId = 0
+
+    var hasEmoji = false
+    var isImportant = false
+    var isRead = false
+
+    @ColumnInfo(typeAffinity = ColumnInfo.BLOB)
+    @TypeConverters(ArrayListToByteArrayConverter::class)
+    var attachments: ArrayList<VKModel> = arrayListOf()
+
+    //    @Ignore
+    @ColumnInfo(typeAffinity = ColumnInfo.BLOB)
+    @TypeConverters(ForwardedConverter::class)
+    var fwdMessages: ArrayList<VKMessage> = arrayListOf()
+
+    var replyMessageId = 0
+
+    @Embedded(prefix = "mAction")
+    var action: VKMessageAction? = null
+
+    @Embedded(prefix = "mUser")
+    var fromUser: VKUser? = null
+
+    @Embedded(prefix = "Group")
+    var fromGroup: VKGroup? = null
+
+    constructor(o: JSONObject) : this() {
+        messageId = o.optInt("id", -1)
+        date = o.optInt("date")
+        peerId = o.optInt("peer_id", -1)
+        fromId = o.optInt("from_id", -1)
+        editTime = o.optInt("edit_time", -1)
+        isOut = o.optInt("out") == 1
+        text = o.optString("text")
+        randomId = o.optInt("random_id", -1)
+        conversationMessageId = o.optInt("conversation_message_id", -1)
+        isImportant = o.optBoolean("important")
+
+        o.optJSONArray("attachments")?.let {
+            attachments = VKAttachments.parse(it)
+        }
+
+        o.optJSONArray("fwd_messages")?.let {
+            val fwdMessages = ArrayList<VKMessage>(it.length())
+            for (i in 0 until it.length()) {
+                fwdMessages.add(VKMessage(it.optJSONObject(i)))
+            }
+            this.fwdMessages = fwdMessages
+        }
+
+        o.optJSONObject("reply_message")?.let {
+            replyMessageId = VKMessage(it).messageId
+        }
+
+        o.optJSONObject("action")?.let {
+            action = VKMessageAction(it)
+        }
+    }
+
+    fun getForwardedMessages() = ArrayList<VKMessage>().apply {
+        for (model in fwdMessages) add(model)
+    }
+
+    fun isFromUser() = fromId > 0
+
+    fun isFromGroup() = fromId < 0
+
+    fun isOutbox() = isOut
+
+    fun isInbox() = !isOutbox()
+
+    fun isReaded() = isRead
+
+    fun isUnreaded() = !isReaded()
+
+    override fun toString(): String {
+        return if (text.isNotEmpty()) {
+            text
+        } else {
+            super.toString()
+        }
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKMessageAction.kt

@@ -0,0 +1,57 @@
+package com.meloda.fast.api.model
+
+import androidx.room.Ignore
+import org.json.JSONObject
+
+class VKMessageAction() : VKModel() {
+
+    companion object {
+        const val ACTION_CHAT_CREATE = "chat_create"
+        const val ACTION_PHOTO_UPDATE = "chat_photo_update"
+        const val ACTION_PHOTO_REMOVE = "chat_photo_remove"
+        const val ACTION_TITLE_UPDATE = "chat_title_update"
+        const val ACTION_PIN_MESSAGE = "chat_pin_message"
+        const val ACTION_UNPIN_MESSAGE = "chat_unpin_message"
+        const val ACTION_INVITE_USER = "chat_invite_user"
+        const val ACTION_INVITE_USER_BY_LINK = "chat_invite_user_by_link"
+        const val ACTION_KICK_USER = "chat_kick_user"
+        const val ACTION_SCREENSHOT = "chat_screenshot"
+        const val ACTION_INVITE_USER_BY_CALL = "chat_invite_user_by_call"
+        const val ACTION_INVITE_USER_BY_CALL_JOIN_LINK = "chat_invite_user_by_call_link"
+    }
+
+    /*
+        chat_photo_update — обновлена фотография беседы;
+        chat_photo_remove — удалена фотография беседы;
+        chat_create — создана беседа;
+        chat_title_update — обновлено название беседы;
+        chat_invite_user — приглашен пользователь;
+        chat_kick_user — исключен пользователь;
+        chat_pin_message — закреплено сообщение;
+        chat_unpin_message — откреплено сообщение;
+        chat_invite_user_by_link — пользователь присоединился к беседе по ссылке.
+    */
+
+    var type: String = ""
+
+    var memberId = 0
+
+    @Ignore
+    var message: VKMessage? = null
+
+    var conversationMessageId = 0
+
+    var text: String = ""
+    var oldText: String = ""
+
+//    @Embedded(prefix = "photo")
+//    var photo: Photo? = null
+
+    //TODO: add photo
+
+    constructor(o: JSONObject) : this() {
+        type = o.optString("type")
+        memberId = o.optInt("member_id", -1)
+        text = o.optString("text")
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKModel.kt

@@ -0,0 +1,9 @@
+package com.meloda.fast.api.model
+
+import java.io.Serializable
+
+abstract class VKModel : Serializable {
+    companion object {
+        const val serialVersionUID = 1L
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKPhoto.kt

@@ -0,0 +1,28 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+import java.util.*
+
+class VKPhoto(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var id = o.optInt("id", -1)
+    var albumId = o.optInt("album_id", -1)
+    var ownerId = o.optInt("owner_id", -1)
+    var text: String = o.optString("text")
+    var date = o.optInt("date")
+    var width = o.optInt("width")
+    var height = o.optInt("height")
+    var sizes: ArrayList<VKPhotoSize>? = null
+
+    init {
+        o.optJSONArray("sizes")?.let {
+            val sizes = ArrayList<VKPhotoSize>()
+            for (i in 0 until it.length()) {
+                sizes.add(VKPhotoSize(it.optJSONObject(i)))
+            }
+            this.sizes = sizes
+        }
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKPhotoSize.kt

@@ -0,0 +1,14 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+
+class VKPhotoSize(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var type: String = o.optString("type")
+    var url: String = o.optString("url")
+    var height = o.optInt("height")
+    var width = o.optInt("width")
+
+}

app/src/main/java/com/meloda/fast/api/model/VKPinnedMessage.kt

@@ -0,0 +1,25 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+import java.util.*
+
+class VKPinnedMessage(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var id = o.optInt("id", -1)
+    var date = o.optInt("date")
+    var fromId = o.optInt("from_id", -1)
+    var text: String = o.optString("text")
+    var attachments: ArrayList<VKModel>? = null
+    var fwdMessages: ArrayList<VKMessage>? = null
+
+    init {
+        o.optJSONArray("attachments")?.let {
+            attachments = VKAttachments.parse(it)
+        }
+
+        //TODO: parse forwarded
+    }
+
+}

app/src/main/java/com/meloda/fast/api/model/VKPoll.kt

@@ -0,0 +1,55 @@
+package com.meloda.fast.api.model
+
+import android.graphics.Color
+import org.json.JSONObject
+import java.io.Serializable
+import java.util.*
+
+class VKPoll(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var id = o.optInt("id", -1)
+    var ownerId = o.optInt("owner_id", -1)
+    var created = o.optInt("created")
+    var question: String = o.optString("question")
+    var votes = o.optInt("votes")
+    var answers = ArrayList<Answer>()
+    var isAnonymous = o.optBoolean("anonymous")
+    var isMultiple = o.optBoolean("multiple")
+    var answerIds = ArrayList<Int>()
+    var endDate = o.optInt("end_date")
+    var isClosed = o.optBoolean("closed")
+    var isBoard = o.optBoolean("is_board")
+    var isCanEdit = o.optBoolean("can_edit")
+    var isCanVote = false
+    var isCanReport = false
+    var isCanShare = false
+    var authorId = 0
+    var background = Color.WHITE
+
+    //TODO: private ArrayList friends
+
+    init {
+        o.optJSONArray("answers")?.let {
+            val answers = ArrayList<Answer>()
+            for (i in 0 until it.length()) {
+                answers.add(Answer(it.optJSONObject(i)))
+            }
+            this.answers = answers
+        }
+
+        //setAnswerIds();
+
+        // ...
+    }
+
+    class Answer(o: JSONObject) : Serializable {
+
+        var id = o.optInt("id", -1)
+        var text: String = o.optString("text")
+        var votes = o.optInt("votes")
+        var rate = o.optInt("rate")
+
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKSticker.kt

@@ -0,0 +1,31 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+import java.util.*
+
+class VKSticker(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var productId = o.optInt("product_id", -1)
+    var stickerId = o.optInt("sticker_id", -1)
+    var images: ArrayList<Image>? = null
+
+    init {
+        o.optJSONArray("images")?.let {
+            val images = ArrayList<Image>()
+            for (i in 0 until it.length()) {
+                images.add(Image(it.optJSONObject(i)))
+            }
+            this.images = images
+        }
+    }
+
+    class Image(o: JSONObject) : VKModel() {
+
+        var url: String = o.optString("url")
+        var width = o.optInt("width")
+        var height = o.optInt("height")
+
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKUser.kt

@@ -0,0 +1,74 @@
+package com.meloda.fast.api.model
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import org.json.JSONArray
+import org.json.JSONObject
+
+@Entity(tableName = "users")
+open class VKUser(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    companion object {
+
+        var friendsCount: Int = 0
+
+        const val DEFAULT_FIELDS =
+            "photo_50,photo_100,photo_200,status,screen_name,online,online_mobile,last_seen,verified,sex"
+
+        val EMPTY: VKUser = object : VKUser() {
+            override fun toString(): String {
+                return "Unknown Unknown"
+            }
+        }
+
+        fun isUserId(id: Int): Boolean {
+            return id > 0 && id < 2000000000
+        }
+
+
+        @JvmStatic
+        fun parse(array: JSONArray): ArrayList<VKUser> {
+            val users = ArrayList<VKUser>()
+
+            for (i in 0 until array.length()) {
+                users.add(VKUser(array.optJSONObject(i)))
+            }
+
+            return users
+        }
+    }
+
+    @PrimaryKey(autoGenerate = false)
+    var userId = o.optInt("id", -1)
+    var firstName: String = o.optString("first_name")
+    var lastName: String = o.optString("last_name")
+    var deactivated: String = o.optString("deactivated")
+    var isClosed = o.optBoolean("is_closed")
+    var isCanAccessClosed = o.optBoolean("can_access_closed")
+    var sex = o.optInt("sex")
+    var screenName: String = o.optString("screen_name")
+    var photo50: String = o.optString("photo_50")
+    var photo100: String = o.optString("photo_100")
+    var photo200: String = o.optString("photo_200")
+    var isOnline = o.optInt("online") == 1
+    var isOnlineMobile = isOnline && o.optInt("online_mobile") == 1
+    var status: String = o.optString("status")
+
+    var lastSeen = 0
+    var lastSeenPlatform = 0
+
+    var isVerified = o.optInt("verified") == 1
+
+    init {
+        o.optJSONObject("last_seen")?.let {
+            lastSeen = it.optInt("time")
+            lastSeenPlatform = it.optInt("platform")
+        }
+    }
+
+    override fun toString(): String {
+        return "$firstName $lastName"
+    }
+}

app/src/main/java/com/meloda/fast/api/model/VKVideo.kt

@@ -0,0 +1,37 @@
+package com.meloda.fast.api.model
+
+import org.json.JSONObject
+
+class VKVideo(o: JSONObject) : VKModel() {
+
+    constructor() : this(JSONObject())
+
+    var id = o.optInt("id", -1)
+    var ownerId = o.optInt("owner_id", -1)
+    var title: String = o.optString("title")
+    var description: String = o.optString("description")
+    var duration = o.optInt("duration", -1)
+    var photo130: String = o.optString("photo_130")
+    var photo320: String = o.optString("photo_320")
+    var photo640: String = o.optString("photo_640")
+    var photo800: String = o.optString("photo_800")
+    var photo1280: String = o.optString("photo_1280")
+    var firstFrame130: String = o.optString("first_frame_130")
+    var firstFrame320: String = o.optString("first_frame_320")
+    var firstFrame640: String = o.optString("first_frame_640")
+    var firstFrame800: String = o.optString("first_frame_800")
+    var firstFrame1280: String = o.optString("first_frame_1280")
+    var date = o.optInt("date")
+    var views = o.optInt("views")
+    var comments = o.optInt("comments")
+    var player: String = o.optString("player")
+    var isCanEdit = o.optInt("can_edit", 0) == 1
+    var isCanAdd = o.optInt("can_add") == 1
+    var isPrivate = o.optInt("is_private", 0) == 1
+    var accessKey: String = o.optString("access_key")
+    var isProcessing = o.optInt("processing", 0) == 1
+    var isLive = o.optInt("live", 0) == 1
+    var isUpcoming = o.optInt("upcoming", 0) == 1
+    var isFavorite = o.optBoolean("favorite")
+
+}

app/src/main/java/com/meloda/fast/api/model/VKWall.kt

@@ -0,0 +1,4 @@
+package com.meloda.fast.api.model
+
+class VKWall { //https://vk.com/dev/objects/post
+}

app/src/main/java/com/meloda/fast/api/util/VKUtil.kt

@@ -0,0 +1,680 @@
+package com.meloda.fast.api.util
+
+import android.content.Context
+import android.graphics.drawable.Drawable
+import android.util.Log
+import androidx.annotation.WorkerThread
+import androidx.core.content.ContextCompat
+import com.amulyakhare.textdrawable.TextDrawable
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.R
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.api.VKApiKeys
+import com.meloda.fast.api.model.*
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.extensions.ContextExtensions.color
+import com.meloda.fast.extensions.ContextExtensions.drawable
+import com.meloda.fast.extensions.StringExtensions.lowerCase
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.fast.util.TextUtils
+import org.json.JSONArray
+import java.text.SimpleDateFormat
+import java.util.*
+import java.util.regex.Pattern
+import kotlin.math.abs
+
+object VKUtil {
+
+    private const val TAG = "VKM: VKUtil"
+
+    fun extractPattern(string: String, pattern: String): String? {
+        val p = Pattern.compile(pattern)
+        val m = p.matcher(string)
+        return if (!m.find()) null else m.toMatchResult().group(1)
+    }
+
+    private const val pattern_string_profile_id = "^(id)?(\\d{1,10})$"
+
+    private val pattern_profile_id = Pattern.compile(pattern_string_profile_id)
+
+    fun parseProfileId(text: String): String? {
+        val m = pattern_profile_id.matcher(text)
+        return if (!m.find()) null else m.group(2)
+    }
+
+    fun sortMessagesByDate(
+        values: ArrayList<VKMessage>,
+        firstOnTop: Boolean
+    ): ArrayList<VKMessage> {
+        values.sortWith { m1, m2 ->
+            val d1 = m1.date
+            val d2 = m2.date
+
+            if (firstOnTop) {
+                d2 - d1
+            } else {
+                d1 - d2
+            }
+        }
+
+        return values
+    }
+
+    fun sortConversationsByDate(
+        values: ArrayList<VKConversation>,
+        firstOnTop: Boolean
+    ): ArrayList<VKConversation> {
+        values.sortWith { c1, c2 ->
+            val d1 = c1.lastMessage.date
+            val d2 = c2.lastMessage.date
+
+            return@sortWith if (firstOnTop) {
+                d2 - d1
+            } else {
+                d1 - d2
+            }
+        }
+
+        return values
+    }
+
+    fun matchMentions(text: String): String {
+        return text
+    }
+
+//    fun removeTime(date: Date): Long {
+//        return Calendar.getInstance().apply {
+//            time = date
+//            this[Calendar.HOUR_OF_DAY] = 0
+//            this[Calendar.MINUTE] = 0
+//            this[Calendar.SECOND] = 0
+//            this[Calendar.MILLISECOND] = 0
+//        }.timeInMillis
+//    }
+
+    fun getUserOnline(user: VKUser): String {
+        val r = AppGlobal.resources
+        return if (user.isOnline) {
+            if (user.isOnlineMobile) {
+                r.getString(R.string.user_online_mobile)
+            } else {
+                r.getString(R.string.user_online)
+            }
+        } else {
+            if (user.lastSeen == 0) {
+                r.getString(R.string.user_last_seen_recently)
+            } else {
+                r.getString(R.string.user_last_seen_at, getLastSeenTime(user.lastSeen * 1000L))
+            }
+        }
+    }
+
+    fun getUserOnlineIcon(
+        context: Context,
+        conversation: VKConversation?,
+        peerUser: VKUser?
+    ): Drawable? {
+        return if (conversation != null) {
+            if (conversation.isUser() && peerUser != null) {
+                if (!peerUser.isOnline) {
+                    null
+                } else {
+                    ContextCompat.getDrawable(
+                        context,
+                        if (peerUser.isOnlineMobile) R.drawable.ic_online_mobile else R.drawable.ic_online_pc
+                    )
+                }
+            } else null
+        } else {
+            if (peerUser!!.isOnline) {
+                ContextCompat.getDrawable(
+                    context,
+                    if (peerUser.isOnlineMobile) R.drawable.ic_online_mobile else R.drawable.ic_online_pc
+                )
+            } else {
+                null
+            }
+        }
+    }
+
+    fun getUserOnlineIcon(context: Context, user: VKUser): Drawable? {
+        return getUserOnlineIcon(context, null, user)
+    }
+
+    //TODO: нормальное время
+    fun getLastSeenTime(date: Long): String {
+        return SimpleDateFormat("HH:mm", Locale.getDefault()).format(date)
+    }
+
+    fun getAvatarPlaceholder(context: Context, dialogTitle: String): TextDrawable {
+        return TextDrawable.builder().buildRound(
+            if (dialogTitle.isEmpty()) "" else {
+                TextUtils.getFirstLetterFromString(dialogTitle)
+            },
+            context.color(R.color.accent)
+        )
+    }
+
+    @WorkerThread
+    fun searchUser(id: Int, onResponseListener: OnResponseListener<VKUser>? = null): VKUser? {
+        return if (VKGroup.isGroupId(id) || isChatId(id)) {
+            null
+        } else {
+            MemoryCache.getUserById(id)?.let { return it }
+
+            if (BuildConfig.DEBUG) {
+                Log.d(TAG, "User with id $id not found")
+            }
+
+            TaskManager.loadUser(VKApiKeys.UPDATE_USER, id, onResponseListener)
+
+            return null
+        }
+    }
+
+    @WorkerThread
+    fun searchGroup(id: Int, onResponseListener: OnResponseListener<VKGroup>? = null): VKGroup? {
+        return if (!VKGroup.isGroupId(id) || isChatId(id)) {
+            null
+        } else {
+            MemoryCache.getGroupById(abs(id))?.let { return it }
+
+            if (BuildConfig.DEBUG) {
+                Log.d(TAG, "Group with id $id not found")
+            }
+
+            TaskManager.loadGroup(VKApiKeys.UPDATE_GROUP, abs(id), onResponseListener)
+
+            return null
+        }
+    }
+
+    fun getTitle(conversation: VKConversation, peerUser: VKUser?, peerGroup: VKGroup?): String {
+        return when {
+            conversation.isUser() -> {
+                peerUser?.let { return it.toString() } ?: ""
+            }
+
+            conversation.isGroup() -> {
+                peerGroup?.let { return it.name } ?: ""
+            }
+
+            conversation.isChat() -> {
+                conversation.title
+            }
+
+            else -> ""
+        }
+    }
+
+    fun getMessageTitle(message: VKMessage, fromUser: VKUser?, fromGroup: VKGroup?): String {
+        return when {
+            message.isFromUser() -> {
+                fromUser?.let { return it.toString() } ?: ""
+            }
+
+            message.isFromGroup() -> {
+                fromGroup?.let { return it.name } ?: ""
+            }
+
+            else -> ""
+        }
+    }
+
+    fun getAvatar(conversation: VKConversation, peerUser: VKUser?, peerGroup: VKGroup?): String {
+        return when {
+            conversation.isUser() -> {
+                peerUser?.let { return it.photo200 } ?: ""
+            }
+
+            conversation.isGroup() -> {
+                peerGroup?.let { return it.photo200 } ?: ""
+            }
+
+            conversation.isChat() -> {
+                conversation.photo200
+            }
+
+            else -> ""
+        }
+    }
+
+    fun getUserAvatar(message: VKMessage, fromUser: VKUser?, fromGroup: VKGroup?): String {
+        return when {
+            message.isFromUser() -> {
+                fromUser?.let { return it.photo100 } ?: ""
+            }
+
+            message.isFromGroup() -> {
+                fromGroup?.let { return it.photo100 } ?: ""
+            }
+
+            else -> ""
+        }
+    }
+
+    fun getUserPhoto(user: VKUser): String {
+        if (user.photo200.isEmpty()) {
+            if (user.photo100.isEmpty()) {
+                if (user.photo50.isEmpty()) {
+                    return ""
+                }
+            } else {
+                return user.photo100
+            }
+        } else {
+            return user.photo200
+        }
+
+        return ""
+    }
+
+    fun getGroupPhoto(group: VKGroup): String {
+        if (group.photo200.isEmpty()) {
+            if (group.photo100.isEmpty()) {
+                if (group.photo50.isEmpty()) {
+                    return ""
+                }
+            } else {
+                return group.photo100
+            }
+        } else {
+            return group.photo200
+        }
+
+        return ""
+    }
+
+    fun getDialogType(context: Context, conversation: VKConversation): Drawable? {
+        return when {
+            conversation.isGroupChannel -> {
+                ContextCompat.getDrawable(context, R.drawable.ic_dialog_type_channel)
+            }
+            conversation.isChat() -> {
+                ContextCompat.getDrawable(context, R.drawable.ic_dialog_type_conversation)
+            }
+            else -> null
+        }
+    }
+
+    fun getAttachmentText(context: Context, attachments: List<VKModel>): String {
+        val resId: Int
+
+        if (attachments.isNotEmpty()) {
+            if (attachments.size > 1) {
+                var oneType = true
+                val className = attachments[0].javaClass.simpleName
+
+                for (model in attachments) {
+                    if (model.javaClass.simpleName != className) {
+                        oneType = false
+                        break
+                    }
+                }
+
+                return if (oneType) {
+                    val objectClass: Class<VKModel> = attachments[0].javaClass
+                    resId = when (objectClass) {
+                        VKPhoto::class.java -> {
+                            R.string.message_attachment_photos
+                        }
+                        VKVideo::class.java -> {
+                            R.string.message_attachment_videos
+                        }
+                        VKAudio::class.java -> {
+                            R.string.message_attachment_audios
+                        }
+                        VKDoc::class.java -> {
+                            R.string.message_attachment_docs
+                        }
+                        else -> {
+                            -1
+                        }
+                    }
+                    if (resId == -1) "Unknown attachments" else context.getString(
+                        resId,
+                        attachments.size
+                    ).toLowerCase(Locale.getDefault())
+                } else {
+                    context.getString(R.string.message_attachments_many)
+                }
+            } else {
+                val objectClass: Class<VKModel> = attachments[0].javaClass
+
+                resId = when (objectClass) {
+                    VKPhoto::class.java -> {
+                        R.string.message_attachment_photo
+                    }
+                    VKAudio::class.java -> {
+                        R.string.message_attachment_audio
+                    }
+                    VKVideo::class.java -> {
+                        R.string.message_attachment_video
+                    }
+                    VKDoc::class.java -> {
+                        R.string.message_attachment_doc
+                    }
+                    VKGraffiti::class.java -> {
+                        R.string.message_attachment_graffiti
+                    }
+                    VKAudioMessage::class.java -> {
+                        R.string.message_attachment_voice
+                    }
+                    VKSticker::class.java -> {
+                        R.string.message_attachment_sticker
+                    }
+                    VKGift::class.java -> {
+                        R.string.message_attachment_gift
+                    }
+                    VKLink::class.java -> {
+                        R.string.message_attachment_link
+                    }
+                    VKPoll::class.java -> {
+                        R.string.message_attachment_poll
+                    }
+                    VKCall::class.java -> {
+                        R.string.message_attachment_call
+                    }
+                    else -> {
+                        return "Unknown"
+                    }
+                }
+            }
+        } else {
+            return ""
+        }
+        return context.getString(resId)
+    }
+
+    fun getAttachmentDrawable(context: Context, attachments: List<VKModel>): Drawable? {
+        if (attachments.isEmpty() || attachments.size > 1) return null
+
+        var resId = -1
+
+        when (attachments[0].javaClass) {
+            VKPhoto::class.java -> {
+                resId = R.drawable.ic_message_attachment_camera
+            }
+            VKAudio::class.java -> {
+                resId = R.drawable.ic_message_attachment_audio
+            }
+            VKVideo::class.java -> {
+                resId = R.drawable.ic_message_attachment_video
+            }
+            VKDoc::class.java -> {
+                resId = R.drawable.ic_message_attachment_doc
+            }
+            VKGraffiti::class.java -> {
+                resId = R.drawable.ic_message_attachment_graffiti
+            }
+            VKAudioMessage::class.java -> {
+                resId = R.drawable.ic_message_attachment_audio_message
+            }
+            VKSticker::class.java -> {
+                resId = R.drawable.ic_message_attachment_sticker
+            }
+            VKGift::class.java -> {
+                resId = R.drawable.ic_message_attachment_gift
+            }
+            VKLink::class.java -> {
+                resId = R.drawable.ic_message_attachment_link
+            }
+            VKPoll::class.java -> {
+                resId = R.drawable.ic_message_attachment_poll
+            }
+            VKCall::class.java -> {
+                resId = R.drawable.ic_message_attachment_call
+            }
+        }
+
+        if (resId != -1) {
+            val drawable = context.drawable(resId)
+
+            drawable?.setTint(context.color(R.color.accent))
+            return drawable
+        }
+        return null
+    }
+
+    fun getFwdText(context: Context, forwardedMessages: List<VKMessage>): String {
+        return if (forwardedMessages.isNotEmpty()) {
+            if (forwardedMessages.size > 1) {
+                context.getString(R.string.message_fwd_many, forwardedMessages.size).lowerCase()
+            } else {
+                context.getString(R.string.message_fwd_one)
+            }
+        } else ""
+    }
+
+    @Deprecated("need to rewrite")
+    fun getActionText(
+        context: Context,
+        lastMessage: VKMessage,
+        onResponseListener: OnResponseListener<String>
+    ) {
+        TaskManager.execute {
+            lastMessage.action?.let {
+                var result = ""
+
+                when (it.type) {
+                    VKMessageAction.ACTION_CHAT_CREATE -> result = context.getString(
+                        R.string.message_action_created_chat,
+                        ""
+                    )
+                    VKMessageAction.ACTION_INVITE_USER -> result =
+                        if (lastMessage.fromId == lastMessage.action!!.memberId) {
+                            context.getString(R.string.message_action_returned_to_chat, "")
+                        } else {
+                            val invited = MemoryCache.getUserById(lastMessage.action!!.memberId)
+                            context.getString(R.string.message_action_invited_user, invited)
+                        }
+                    VKMessageAction.ACTION_INVITE_USER_BY_LINK -> result = context.getString(
+                        R.string.message_action_invited_by_link,
+                        ""
+                    )
+                    VKMessageAction.ACTION_KICK_USER -> result =
+                        if (lastMessage.fromId == lastMessage.action!!.memberId) {
+                            context.getString(R.string.message_action_left_from_chat, "")
+                        } else {
+                            val kicked = MemoryCache.getUserById(lastMessage.action!!.memberId)
+                            context.getString(R.string.message_action_kicked_user, kicked)
+                        }
+                    VKMessageAction.ACTION_PHOTO_REMOVE -> result = context.getString(
+                        R.string.message_action_removed_photo,
+                        ""
+                    )
+                    VKMessageAction.ACTION_PHOTO_UPDATE -> result = context.getString(
+                        R.string.message_action_updated_photo,
+                        ""
+                    )
+                    VKMessageAction.ACTION_PIN_MESSAGE -> result = context.getString(
+                        R.string.message_action_pinned_message,
+                        ""
+                    )
+                    VKMessageAction.ACTION_UNPIN_MESSAGE -> result = context.getString(
+                        R.string.message_action_unpinned_message,
+                        ""
+                    )
+                    VKMessageAction.ACTION_TITLE_UPDATE -> result = context.getString(
+                        R.string.message_action_updated_title,
+                        ""
+                    )
+                }
+
+                AppGlobal.post { onResponseListener.onResponse(result) }
+            }
+        }
+    }
+
+    fun getTime(context: Context, lastMessage: VKMessage): String {
+        val then = lastMessage.date * 1000L
+        val now = System.currentTimeMillis()
+
+        val change = abs(now - then)
+
+        val seconds = change / 1000
+
+        if (seconds == 0L) {
+            return context.getString(R.string.time_format_now)
+        }
+
+        val minutes = seconds / 60
+
+        if (minutes == 0L) {
+            return context.getString(R.string.time_format_second, seconds)
+        }
+
+        val hours = minutes / 60
+
+        if (hours == 0L) {
+            return context.getString(R.string.time_format_minute, minutes)
+        }
+
+        val days = hours / 24
+
+        if (days == 0L) {
+            return context.getString(R.string.time_format_hour, hours)
+        }
+
+        val months = days / 30
+
+        if (months == 0L) {
+            return context.getString(R.string.time_format_day, days)
+        }
+
+        val years = months / 12
+
+        if (years == 0L) {
+            return context.getString(R.string.time_format_month, months)
+        } else if (years > 0L) {
+            return context.getString(R.string.time_format_year, years)
+        }
+
+        return SimpleDateFormat("HH:mm", Locale.getDefault()).format(then)
+    }
+
+    fun parseConversations(array: JSONArray): ArrayList<VKConversation> {
+        val conversations = arrayListOf<VKConversation>()
+        for (i in 0 until array.length()) {
+            conversations.add(VKConversation(array.optJSONObject(i)))
+        }
+
+        return conversations
+    }
+
+    fun parseMessages(array: JSONArray): ArrayList<VKMessage> {
+        val messages = arrayListOf<VKMessage>()
+        for (i in 0 until array.length()) {
+            messages.add(VKMessage(array.optJSONObject(i)))
+        }
+
+        return messages
+    }
+
+    fun isChatId(id: Int) = id > 2_000_000_000
+
+    fun isMessageHasFlag(mask: Int, flagName: String): Boolean {
+        val o: Any? = VKMessage.flags[flagName]
+        return if (o != null) { //has flag
+            val flag = o as Int
+            flag and mask > 0
+        } else false
+    }
+
+    //TODO: rewrite parsing
+    //fromUser and fromGroup are null
+    @Deprecated("need to rewrite")
+    @WorkerThread
+    fun parseLongPollMessage(array: JSONArray): VKMessage {
+        val message = VKMessage()
+
+        val id = array.optInt(1)
+        val flags = array.optInt(2)
+        val peerId = array.optInt(3)
+        val date = array.optInt(4)
+        val text = array.optString(5)
+
+        message.messageId = id
+        message.peerId = peerId
+        message.date = date
+        message.text = text
+
+        val fromId =
+            if (isMessageHasFlag(flags, "outbox")) UserConfig.userId
+            else peerId
+
+        message.fromId = fromId
+
+        array.optJSONObject(6)?.let {
+            if (it.has("emoji")) message.hasEmoji = true
+
+            if (it.has("from")) {
+                message.fromId = it.optInt("from", -1)
+            }
+
+            if (it.has("source_act")) {
+                message.action = VKMessageAction().also { action ->
+                    action.type = it.optString("source_act")
+
+                    when (action.type) {
+                        VKMessageAction.ACTION_CHAT_CREATE -> {
+                            action.text = it.optString("source_text")
+                        }
+                        VKMessageAction.ACTION_TITLE_UPDATE -> {
+                            action.oldText = it.optString("source_old_text")
+                            action.text = it.optString("source_text")
+                        }
+                        VKMessageAction.ACTION_PIN_MESSAGE -> {
+                            action.memberId = it.optInt("source_mid")
+                            action.conversationMessageId = it.optInt("source_chat_local_id")
+
+                            it.optJSONObject("source_message")?.let { message ->
+                                action.message = VKMessage(message)
+                            }
+                        }
+                        VKMessageAction.ACTION_UNPIN_MESSAGE -> {
+                            action.memberId = it.optInt("source_mid")
+                            action.conversationMessageId = it.optInt("source_chat_local_id")
+                        }
+                        VKMessageAction.ACTION_INVITE_USER,
+                        VKMessageAction.ACTION_KICK_USER,
+                        VKMessageAction.ACTION_SCREENSHOT,
+                        VKMessageAction.ACTION_INVITE_USER_BY_CALL -> {
+                            action.memberId = it.optInt("source_mid")
+                        }
+                    }
+                }
+            }
+        }
+
+        array.optJSONObject(7)?.let {
+            /**
+             *
+             *    fwd?   reply?   attachments_count?  attachments?
+             *
+             */
+        }
+
+        val randomId = array.optInt(8)
+        message.randomId = randomId
+
+        val conversationMessageId = array.optInt(9)
+        message.conversationMessageId = conversationMessageId
+
+        val editTime = array.optInt(10)
+        message.editTime = editTime
+
+        val out = fromId == UserConfig.userId
+        message.isOut = out
+
+        if (message.isFromUser()) {
+            message.fromUser = MemoryCache.getUserById(fromId)
+        } else {
+            message.fromGroup = MemoryCache.getGroupById(abs(fromId))
+        }
+
+        return message
+    }
+}

app/src/main/java/com/meloda/fast/base/BaseActivity.kt

@@ -0,0 +1,12 @@
+package com.meloda.fast.base
+
+import android.view.View
+import androidx.appcompat.app.AppCompatActivity
+
+abstract class BaseActivity : AppCompatActivity() {
+
+    fun getRootView(): View {
+        return findViewById(android.R.id.content)
+    }
+
+}

app/src/main/java/com/meloda/fast/base/BaseAdapter.kt

@@ -0,0 +1,175 @@
+package com.meloda.fast.base
+
+import android.content.Context
+import android.os.Bundle
+import android.os.Parcelable
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.AdapterView
+import androidx.recyclerview.widget.RecyclerView
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.extensions.ArrayExtensions.asArrayList
+import com.meloda.fast.listener.ItemClickListener
+import com.meloda.fast.listener.ItemLongClickListener
+import java.io.Serializable
+import java.util.*
+
+
+@Suppress("UNCHECKED_CAST")
+abstract class BaseAdapter<T, VH : BaseHolder>(
+    var context: Context,
+    var values: ArrayList<T> = arrayListOf()
+) : RecyclerView.Adapter<VH>() {
+
+    companion object {
+        private const val P_ITEMS = "BaseAdapter.values"
+    }
+
+    private var cleanValues: ArrayList<T>? = null
+
+    private var inflater: LayoutInflater = LayoutInflater.from(context)
+
+    var itemClickListener: ItemClickListener? = null
+    var itemLongClickListener: ItemLongClickListener? = null
+
+    open fun destroy() {}
+
+    open fun getItem(position: Int): T {
+        return values[position]
+    }
+
+    fun add(position: Int, item: T) {
+        values.add(position, item)
+        cleanValues?.add(position, item)
+    }
+
+    fun add(item: T) {
+        values.add(item)
+        cleanValues?.add(item)
+    }
+
+    fun addAll(items: List<T>) {
+        values.addAll(items)
+        cleanValues?.addAll(items)
+    }
+
+    fun addAll(position: Int, items: List<T>) {
+        values.addAll(position, items)
+        cleanValues?.addAll(position, items)
+    }
+
+    operator fun set(position: Int, item: T) {
+        values[position] = item
+        cleanValues?.set(position, item)
+    }
+
+    fun indexOf(item: T): Int {
+        return values.indexOf(item)
+    }
+
+    fun removeAt(index: Int) {
+        values.removeAt(index)
+        cleanValues?.removeAt(index)
+    }
+
+    fun remove(item: T) {
+        values.remove(item)
+        cleanValues?.remove(item)
+    }
+
+    fun isEmpty() = values.isNullOrEmpty()
+
+    fun isNotEmpty() = !isEmpty()
+
+    fun view(resId: Int, viewGroup: ViewGroup): View {
+        return inflater.inflate(resId, viewGroup, false)
+    }
+
+    fun updateValues(arrayList: ArrayList<T>) {
+        values.clear()
+        values.addAll(arrayList)
+    }
+
+    fun updateValues(list: List<T>) = updateValues(list.asArrayList())
+
+    override fun onBindViewHolder(holder: VH, position: Int) {
+        onBindItemViewHolder(holder, position)
+    }
+
+    protected fun initListeners(itemView: View, position: Int) {
+        if (itemView is AdapterView<*>) return
+
+        itemView.setOnClickListener {
+            if (itemClickListener != null) itemClickListener!!.onItemClick(
+                position
+            )
+        }
+        itemView.setOnLongClickListener {
+            if (itemLongClickListener != null) itemLongClickListener!!.onItemLongClick(position)
+            itemClickListener == null
+        }
+    }
+
+    override fun getItemCount(): Int {
+        return values.size
+    }
+
+    private fun onBindItemViewHolder(holder: VH, position: Int) {
+        initListeners(holder.itemView, position)
+        holder.bind(position)
+    }
+
+    fun onSaveInstanceState(): Parcelable {
+        val bundle = Bundle()
+        if (values.size > 0 && (values[0] is Parcelable || values[0] is Serializable)) {
+            bundle.putSerializable(P_ITEMS, values)
+        }
+        return bundle
+    }
+
+    fun post(runnable: Runnable) {
+        AppGlobal.handler.post(runnable)
+    }
+
+    fun onRestoreInstanceState(state: Parcelable?) {
+        if (state is Bundle) {
+            if (state.containsKey(P_ITEMS)) {
+                values = state.getSerializable(P_ITEMS) as ArrayList<T>
+            }
+        }
+    }
+
+    fun clear() {
+        values.clear()
+    }
+
+    open fun filter(query: String) {
+        if (cleanValues == null) {
+            cleanValues = ArrayList(values)
+        }
+
+        values.clear()
+
+        if (query.isEmpty()) {
+            values.addAll(cleanValues!!)
+        } else {
+            for (item in cleanValues!!) {
+                if (onQueryItem(item, query)) {
+                    values.add(item)
+                }
+            }
+        }
+
+        notifyDataSetChanged()
+    }
+
+    open fun onQueryItem(item: T, query: String): Boolean {
+        return false
+    }
+
+    operator fun get(index: Int): T {
+        return values[index]
+    }
+
+}

app/src/main/java/com/meloda/fast/base/BaseFragment.kt

@@ -0,0 +1,23 @@
+package com.meloda.fast.base
+
+import androidx.annotation.IdRes
+import androidx.appcompat.widget.Toolbar
+import androidx.fragment.app.Fragment
+import com.meloda.fast.activity.MainActivity
+
+abstract class BaseFragment : Fragment() {
+
+    protected open fun initToolbar(@IdRes resId: Int) {
+        val toolbar: Toolbar = requireView().findViewById(resId)
+
+        activity?.let {
+            if (it is MainActivity && toolbar is com.meloda.fast.widget.Toolbar) it.initToolbar(
+                toolbar
+            )
+        }
+    }
+
+    protected fun runOnUi(runnable: Runnable) {
+        activity?.runOnUiThread(runnable)
+    }
+}

app/src/main/java/com/meloda/fast/base/BaseFullscreenDialog.kt

@@ -0,0 +1,33 @@
+package com.meloda.fast.base
+
+import android.os.Bundle
+import android.view.ViewGroup
+import android.view.WindowManager
+import androidx.fragment.app.DialogFragment
+import com.meloda.fast.R
+
+abstract class BaseFullscreenDialog : DialogFragment() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setStyle(STYLE_NORMAL, R.style.AppTheme_FullScreenDialog)
+    }
+
+    override fun onStart() {
+        super.onStart()
+
+        dialog?.let { dialog ->
+            val width = ViewGroup.LayoutParams.MATCH_PARENT
+            val height = ViewGroup.LayoutParams.MATCH_PARENT
+
+            dialog.window?.let {
+                it.setLayout(width, height)
+                it.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN)
+                it.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
+
+                it.setWindowAnimations(R.style.AppTheme_Slide)
+            }
+        }
+    }
+}

app/src/main/java/com/meloda/fast/base/BaseHolder.kt

@@ -0,0 +1,8 @@
+package com.meloda.fast.base
+
+import android.view.View
+import androidx.recyclerview.widget.RecyclerView
+
+abstract class BaseHolder(v: View) : RecyclerView.ViewHolder(v) {
+    abstract fun bind(position: Int)
+}

app/src/main/java/com/meloda/fast/base/FragmentStackActivity.kt

@@ -0,0 +1,6 @@
+package com.meloda.fast.base
+
+abstract class FragmentStackActivity : BaseActivity() {
+
+
+}

app/src/main/java/com/meloda/fast/common/AppGlobal.kt

@@ -0,0 +1,161 @@
+package com.meloda.fast.common
+
+import android.annotation.SuppressLint
+import android.app.Application
+import android.app.DownloadManager
+import android.content.ClipboardManager
+import android.content.Context
+import android.content.SharedPreferences
+import android.content.pm.PackageManager
+import android.content.res.Resources
+import android.net.ConnectivityManager
+import android.os.Handler
+import android.view.WindowManager
+import android.view.inputmethod.InputMethodManager
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.content.pm.PackageInfoCompat
+import androidx.preference.PreferenceManager
+import androidx.room.Room
+import com.facebook.drawee.backends.pipeline.Fresco
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.R
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.database.AppDatabase
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.fragment.FragmentSettings
+import com.meloda.fast.util.AndroidUtils
+import com.meloda.mvp.MvpBase
+import com.microsoft.appcenter.AppCenter
+import com.microsoft.appcenter.analytics.Analytics
+import com.microsoft.appcenter.crashes.Crashes
+import org.acra.ACRA
+import org.acra.ReportingInteractionMode
+import org.acra.annotation.ReportsCrashes
+import java.util.*
+
+@SuppressLint("NonConstantResourceId")
+@ReportsCrashes(
+    mailTo = "lischenkodev@gmail.com",
+    mode = ReportingInteractionMode.DIALOG,
+    resDialogTitle = R.string.app_has_been_crashed,
+    resDialogText = R.string.empty,
+    resDialogTheme = R.style.AppTheme_Dialog,
+    resDialogPositiveButtonText = R.string.send_crash_report,
+    resDialogNegativeButtonText = R.string.ok
+)
+class AppGlobal : Application() {
+
+    companion object {
+        const val APP_CENTER_TOKEN = "c87e410a-d622-4c52-ad7e-7388ab511704"
+
+        lateinit var windowManager: WindowManager
+        lateinit var connectivityManager: ConnectivityManager
+        lateinit var inputMethodManager: InputMethodManager
+        lateinit var clipboardManager: ClipboardManager
+        lateinit var downloadManager: DownloadManager
+
+        lateinit var preferences: SharedPreferences
+        lateinit var locale: Locale
+        lateinit var handler: Handler
+        lateinit var resources: Resources
+        lateinit var packageName: String
+        lateinit var database: AppDatabase
+        lateinit var instance: AppGlobal
+
+        lateinit var packageManager: PackageManager
+
+        var versionName = ""
+        var versionCode = 0L
+
+        var screenWidth = 0
+        var screenHeight = 0
+
+        fun post(runnable: Runnable) {
+            handler.post(runnable)
+        }
+    }
+
+    override fun onCreate() {
+        super.onCreate()
+        instance = this
+
+        if (!BuildConfig.DEBUG) {
+            AppCenter.start(
+                this, APP_CENTER_TOKEN, Analytics::class.java, Crashes::class.java
+            )
+
+            ACRA.init(this)
+        }
+
+        Fresco.initialize(this)
+
+        database = Room.databaseBuilder(this, AppDatabase::class.java, "cache")
+            .fallbackToDestructiveMigration()
+            .build()
+
+        preferences = PreferenceManager.getDefaultSharedPreferences(this)
+        handler = Handler(mainLooper)
+        locale = Locale.getDefault()
+
+        val info = packageManager.getPackageInfo(this.packageName, PackageManager.GET_ACTIVITIES)
+        versionName = info.versionName
+        versionCode = PackageInfoCompat.getLongVersionCode(info)
+
+        Companion.resources = resources
+        Companion.packageName = packageName
+        Companion.packageManager = packageManager
+
+        inputMethodManager = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+        windowManager = getSystemService(Context.WINDOW_SERVICE) as WindowManager
+        connectivityManager = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+        clipboardManager = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+        downloadManager = getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
+
+        screenWidth = AndroidUtils.getDisplayWidth()
+        screenHeight = AndroidUtils.getDisplayHeight()
+
+        UserConfig.restore()
+
+        MvpBase.init(handler)
+
+        fillMemoryCache()
+
+        applyNightMode()
+    }
+
+    private fun fillMemoryCache() {
+        TaskManager.execute {
+            val users = database.users.getAll()
+            val groups = database.groups.getAll()
+
+            MemoryCache.appendUsers(users)
+            MemoryCache.appendGroups(groups)
+        }
+    }
+
+    fun applyNightMode(value: String? = null) {
+        val mode = value ?: preferences.getString(FragmentSettings.KEY_THEME, "-1")!!
+
+        val nightMode = getNightMode(mode.toInt())
+
+        val oldNightMode = AppCompatDelegate.getDefaultNightMode()
+
+        AppCompatDelegate.setDefaultNightMode(nightMode)
+    }
+
+    fun getNightMode(nightMode: Int = -1): Int {
+        return AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
+        val mode = if (nightMode != -1) nightMode else preferences.getString(
+            FragmentSettings.KEY_THEME,
+            "-1"
+        )!!.toInt()
+
+        return when (mode) {
+            1 -> AppCompatDelegate.MODE_NIGHT_YES
+            2 -> AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY
+            3 -> AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
+            else -> AppCompatDelegate.MODE_NIGHT_NO
+        }
+    }
+
+}

app/src/main/java/com/meloda/fast/common/FragmentSwitcher.kt

@@ -0,0 +1,118 @@
+package com.meloda.fast.common
+
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
+import com.meloda.fast.R
+import com.meloda.fast.fragment.FragmentConversations
+import com.meloda.fast.fragment.FragmentFriends
+import com.meloda.fast.fragment.FragmentImportant
+
+object FragmentSwitcher {
+
+    fun getCurrentFragment(fragmentManager: FragmentManager): Fragment? {
+        val fragments = fragmentManager.fragments
+
+        if (fragments.isEmpty()) throw RuntimeException("FragmentManager's fragments is empty")
+
+        for (fragment in fragments) {
+            if (fragment.isVisible) {
+                return fragment
+            }
+        }
+
+        return null
+    }
+
+    fun addFragments(
+        fragmentManager: FragmentManager,
+        containerId: Int,
+        fragments: Collection<Fragment>
+    ) {
+        val transaction = fragmentManager.beginTransaction()
+
+        for (fragment in fragments) {
+            transaction.add(containerId, fragment, fragment.javaClass.simpleName)
+        }
+
+        transaction.commitNow()
+    }
+
+    fun showFragment(fragmentManager: FragmentManager, tag: String) {
+        showFragment(fragmentManager, tag, false)
+    }
+
+    fun showFragment(
+        fragmentManager: FragmentManager,
+        tag: String,
+        hideOthers: Boolean,
+        containerId: Int = R.id.fragmentContainer
+    ) {
+        val fragments = fragmentManager.fragments
+
+        if (fragments.isEmpty()) throw RuntimeException("FragmentManager's fragments is empty")
+
+        var fragmentToShow: Fragment? = null
+
+        for (fragment in fragments) {
+            if (fragment.tag != null && fragment.tag == tag) {
+                fragmentToShow = fragment
+                break
+            }
+        }
+
+        val transaction = fragmentManager.beginTransaction()
+
+        if (fragmentToShow == null) {
+            fragmentToShow = createFragmentByTag(tag)
+            transaction.add(containerId, fragmentToShow, tag)
+        } else {
+            transaction.show(fragmentToShow)
+        }
+
+        if (hideOthers) {
+            for (fragment in fragments) {
+                if (fragment.tag != null && fragment.tag == tag) continue
+                transaction.hide(fragment)
+            }
+        }
+
+        transaction.commit()
+    }
+
+    fun clearFragments(fragmentManager: FragmentManager) {
+        val fragments = fragmentManager.fragments
+
+        if (fragments.isEmpty()) throw RuntimeException("FragmentManager's fragments is empty")
+
+        val transaction = fragmentManager.beginTransaction()
+
+        for (fragment in fragments) {
+            transaction.remove(fragment)
+        }
+
+        transaction.commitNow()
+    }
+
+    fun hideFragments(fragmentManager: FragmentManager) {
+        val fragments = fragmentManager.fragments
+
+        if (fragments.isEmpty()) throw RuntimeException("FragmentManager's fragments is empty")
+
+        val transaction = fragmentManager.beginTransaction()
+
+        for (fragment in fragments) {
+            transaction.hide(fragment)
+        }
+
+        transaction.commitNow()
+    }
+
+    private fun createFragmentByTag(tag: String): Fragment {
+        return when (tag) {
+            "FragmentFriends" -> FragmentFriends()
+            "FragmentImportant" -> FragmentImportant()
+            "FragmentConversations" -> FragmentConversations()
+            else -> Fragment()
+        }
+    }
+}

app/src/main/java/com/meloda/fast/common/TaskManager.kt

@@ -0,0 +1,363 @@
+package com.meloda.fast.common
+
+import android.util.Log
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.api.VKApi
+import com.meloda.fast.api.VKApiKeys
+import com.meloda.fast.api.method.MethodSetter
+import com.meloda.fast.api.model.VKConversation
+import com.meloda.fast.api.model.VKGroup
+import com.meloda.fast.api.model.VKMessage
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.concurrent.LowThread
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.event.EventInfo
+import com.meloda.fast.listener.OnResponseListener
+import java.util.*
+import java.util.stream.Collectors
+
+object TaskManager {
+
+    private const val TAG = "TaskManager"
+
+    private val groupsTasksIds = arrayListOf<Int>()
+
+    private var groupsTimer: Timer? = null
+
+    private val usersTasksIds = arrayListOf<Int>()
+
+    private var usersTimer: Timer? = null
+
+    private val messagesTasksIds = arrayListOf<Int>()
+
+    private val messagesReadIds = arrayListOf<Int>()
+
+    private var messagesReadTimer: Timer? = null
+
+    private val conversationsTasksIds = arrayListOf<Int>()
+
+    private val listeners = arrayListOf<OnEventListener?>()
+
+    fun addOnEventListener(listener: OnEventListener?) {
+        listeners.add(listener)
+    }
+
+    fun removeOnEventListener(listener: OnEventListener?) {
+        listeners.remove(listener)
+    }
+
+    fun execute(runnable: Runnable?) {
+        LowThread(runnable).start()
+    }
+
+    private fun <T> addProcedure(
+        methodSetter: MethodSetter,
+        className: Class<T>,
+        pushInfo: EventInfo<*>?,
+        responseListener: OnResponseListener<T>?
+    ) {
+        execute {
+            methodSetter.executeArray(className, object : OnResponseListener<ArrayList<T>> {
+                override fun onResponse(response: ArrayList<T>) {
+                    if (response.isEmpty()) return
+
+                    responseListener?.onResponse(response[0])
+
+                    pushInfo?.let { sendEvent(it) }
+                }
+
+                override fun onError(t: Throwable) {
+                    responseListener?.onError(t)
+                }
+
+            })
+        }
+    }
+
+    fun sendEvent(eventInfo: EventInfo<*>) {
+        AppGlobal.handler.post {
+            for (listener in listeners) {
+                listener?.onNewEvent(eventInfo)
+            }
+        }
+    }
+
+    fun loadUser(
+        eventKey: VKApiKeys,
+        userId: Int,
+        responseListener: OnResponseListener<VKUser>? = null
+    ) {
+        if (usersTasksIds.contains(userId)) return
+        usersTasksIds.add(userId)
+
+        if (BuildConfig.DEBUG) {
+            Log.i(TAG, "Load user: $userId")
+        }
+
+        if (usersTimer != null) {
+            usersTimer?.cancel()
+        }
+
+        usersTimer = Timer()
+        usersTimer?.schedule(object : TimerTask() {
+            override fun run() {
+                val setter = VKApi.users()
+                    .get()
+                    .userIds(usersTasksIds)
+                    .fields(VKUser.DEFAULT_FIELDS)
+
+                val usersIds = arrayListOf<String>()
+                usersTasksIds.forEach { usersIds.add(it.toString()) }
+
+                addProcedure(
+                    setter,
+                    VKUser::class.java,
+                    EventInfo(eventKey, usersTasksIds),
+                    object : OnResponseListener<VKUser> {
+                        override fun onResponse(response: VKUser) {
+                            Log.d(
+                                TAG,
+                                "Loaded users: ${
+                                    usersIds.stream().collect(Collectors.joining(", "))
+                                }"
+                            )
+
+                            usersTasksIds.remove(userId)
+                            responseListener?.onResponse(response)
+
+                            execute { MemoryCache.put(response) }
+                        }
+
+                        override fun onError(t: Throwable) {
+                            Log.w(
+                                TAG,
+                                "Loaded users: ${
+                                    usersIds.stream().collect(Collectors.joining(", "))
+                                }\nStack:${Log.getStackTraceString(t)}"
+                            )
+                            responseListener?.onError(t)
+                        }
+
+                    })
+
+                usersTimer = null
+            }
+        }, 500)
+    }
+
+    fun loadGroup(
+        eventKey: VKApiKeys,
+        groupId: Int,
+        responseListener: OnResponseListener<VKGroup>? = null
+    ) {
+        if (groupsTasksIds.contains(groupId)) return
+        groupsTasksIds.add(groupId)
+
+        if (BuildConfig.DEBUG) {
+            Log.i(TAG, "Load group: $groupId")
+        }
+
+        val setter = VKApi.groups().getById()
+            .groupIds(groupsTasksIds)
+            .fields(VKGroup.DEFAULT_FIELDS)
+
+        if (groupsTimer != null) {
+            groupsTimer?.cancel()
+        }
+
+        groupsTimer = Timer()
+        groupsTimer?.schedule(object : TimerTask() {
+            override fun run() {
+                val groupsIds = arrayListOf<String>()
+                groupsTasksIds.forEach { groupsIds.add(it.toString()) }
+
+                addProcedure(
+                    setter,
+                    VKGroup::class.java,
+                    EventInfo(eventKey, groupsTasksIds),
+                    object : OnResponseListener<VKGroup> {
+                        override fun onResponse(response: VKGroup) {
+                            Log.d(
+                                TAG,
+                                "Loaded groups: ${
+                                    groupsIds.stream().collect(Collectors.joining(", "))
+                                }"
+                            )
+
+                            groupsTasksIds.remove(groupId)
+                            responseListener?.onResponse(response)
+
+                            execute { MemoryCache.put(response) }
+                        }
+
+                        override fun onError(t: Throwable) {
+                            Log.w(
+                                TAG,
+                                "Not loaded Group: ${
+                                    groupsIds.stream().collect(Collectors.joining(", "))
+                                }\nStack: " + Log.getStackTraceString(
+                                    t
+                                )
+                            )
+                            responseListener?.onError(t)
+                        }
+                    })
+            }
+        }, 500)
+
+    }
+
+    fun loadMessage(
+        eventKey: VKApiKeys,
+        messageId: Int,
+        responseListener: OnResponseListener<VKMessage>? = null
+    ) {
+        if (BuildConfig.DEBUG) {
+            Log.i(TAG, "Load message: $messageId")
+        }
+        if (messagesTasksIds.contains(messageId)) return
+        messagesTasksIds.add(messageId)
+
+        val setter = VKApi.messages().getById()
+            .messageIds(messageId)
+            .extended(true)
+            .filter(VKUser.DEFAULT_FIELDS + "," + VKGroup.DEFAULT_FIELDS)
+
+        addProcedure(
+            setter,
+            VKMessage::class.java,
+            EventInfo(eventKey, messageId),
+            object : OnResponseListener<VKMessage> {
+                override fun onResponse(response: VKMessage) {
+                    Log.d(TAG, "Loaded message: $messageId")
+
+                    messagesTasksIds.remove(messageId)
+                    responseListener?.onResponse(response)
+
+                    execute { MemoryCache.put(response) }
+                }
+
+                override fun onError(t: Throwable) {
+                    Log.w(
+                        TAG,
+                        "Not loaded message: $messageId. Stack: " + Log.getStackTraceString(t)
+                    )
+                    responseListener?.onError(t)
+                }
+            })
+    }
+
+    fun readMessage(
+        eventKey: VKApiKeys,
+        peerId: Int,
+        messageId: Int,
+        responseListener: OnResponseListener<Any?>? = null
+    ) {
+        if (messagesReadIds.contains(messageId)) return
+        messagesReadIds.add(messageId)
+
+        if (BuildConfig.DEBUG) {
+            Log.i(TAG, "Read message: $messageId")
+        }
+
+        if (messagesReadTimer != null) {
+            messagesReadTimer?.cancel()
+        }
+
+        messagesReadTimer = Timer()
+        messagesReadTimer?.schedule(object : TimerTask() {
+            override fun run() {
+                val messagesIds = arrayListOf<String>()
+                messagesReadIds.forEach { messagesIds.add(it.toString()) }
+
+                val setter = VKApi.messages().markAsRead()
+//                    .startMessageId(messageId)
+                    .markConversationAsRead(true)
+                    .peerId(peerId)
+
+                addProcedure(
+                    setter,
+                    Int::class.java,
+                    EventInfo(eventKey, arrayOf(peerId, messageId)),
+                    object : OnResponseListener<Int> {
+                        override fun onResponse(response: Int) {
+                            Log.d(
+                                TAG,
+                                "Readed messages: ${
+                                    messagesIds.stream().collect(Collectors.joining(", "))
+                                }"
+                            )
+
+                            messagesReadIds.remove(messageId)
+                            responseListener?.onResponse(response)
+
+                            //TODO: update readed messages in cache
+//                            execute { MemoryCache.put(response) }
+                        }
+
+                        override fun onError(t: Throwable) {
+                            Log.w(
+                                TAG,
+                                "Not readed messages: ${
+                                    messagesIds.stream().collect(Collectors.joining(", "))
+                                }\nStack: " + Log.getStackTraceString(
+                                    t
+                                )
+                            )
+                            responseListener?.onError(t)
+                        }
+                    }
+                )
+            }
+
+        }, 500)
+    }
+
+    fun loadConversation(
+        eventKey: VKApiKeys,
+        conversationId: Int,
+        responseListener: OnResponseListener<VKConversation>? = null
+    ) {
+        if (BuildConfig.DEBUG) {
+            Log.i(TAG, "Load conversation: $conversationId")
+        }
+        if (conversationsTasksIds.contains(conversationId)) return
+        conversationsTasksIds.add(conversationId)
+
+        val setter = VKApi.messages()
+            .getConversationsById()
+            .peerIds(conversationId)
+            .extended(true)
+            .fields(VKUser.DEFAULT_FIELDS + "," + VKGroup.DEFAULT_FIELDS)
+
+        addProcedure(
+            setter,
+            VKConversation::class.java,
+            EventInfo(eventKey, conversationId),
+            object : OnResponseListener<VKConversation> {
+                override fun onResponse(response: VKConversation) {
+                    Log.d(TAG, "Loaded conversation: $conversationId")
+
+                    conversationsTasksIds.remove(conversationId)
+                    responseListener?.onResponse(response)
+
+                    execute { MemoryCache.put(response) }
+                }
+
+                override fun onError(t: Throwable) {
+                    Log.w(
+                        TAG,
+                        "Not loaded conversation: $conversationId. Stack: " + Log.getStackTraceString(
+                            t
+                        )
+                    )
+                    responseListener?.onError(t)
+                }
+
+            })
+    }
+
+    interface OnEventListener {
+        fun onNewEvent(info: EventInfo<*>)
+    }
+}

app/src/main/java/com/meloda/fast/common/TimeManager.kt

@@ -0,0 +1,98 @@
+package com.meloda.fast.common
+
+import android.content.Context
+import android.content.IntentFilter
+import com.meloda.fast.receiver.MinuteReceiver
+import java.util.*
+
+object TimeManager {
+
+    var currentHour = 0
+    var currentMinute = 0
+    var currentSecond = 0
+
+    private val onHourChangeListeners: ArrayList<OnHourChangeListener> = ArrayList()
+    private val onMinuteChangeListeners: ArrayList<OnMinuteChangeListener> = ArrayList()
+    private val onSecondChangeListeners: ArrayList<OnSecondChangeListener> = ArrayList()
+    private val onTimeChangeListeners: ArrayList<OnTimeChangeListener> = ArrayList()
+
+    fun init(context: Context) {
+        context.registerReceiver(MinuteReceiver(), IntentFilter("android.intent.action.TIME_TICK"))
+
+        addOnMinuteChangeListener(minuteChangeListener)
+    }
+
+    private var minuteChangeListener = object : OnMinuteChangeListener {
+        override fun onMinuteChange(currentMinute: Int) {
+            TimeManager.currentMinute = currentMinute
+        }
+    }
+
+    fun destroy() {
+        removeOnMinuteChangeListener(minuteChangeListener)
+    }
+
+    fun broadcastMinute() {
+        for (onMinuteChangeListener in onMinuteChangeListeners) {
+            onMinuteChangeListener.onMinuteChange(0)
+        }
+    }
+
+    val isMorning = currentHour in 7..11
+
+    val isAfternoon = currentHour in 12..16
+
+    val isEvening = currentHour in 17..22
+
+    val isNight = currentHour == 23 || currentHour < 6 && currentHour > -1
+
+    fun addOnHourChangeListener(onHourChangeListeners: OnHourChangeListener) {
+        TimeManager.onHourChangeListeners.add(onHourChangeListeners)
+    }
+
+    fun removeOnHourChangeListener(onHourChangeListener: OnHourChangeListener?) {
+        onHourChangeListeners.remove(onHourChangeListener)
+    }
+
+    fun addOnMinuteChangeListener(onMinuteChangeListener: OnMinuteChangeListener) {
+        onMinuteChangeListeners.add(onMinuteChangeListener)
+    }
+
+    fun removeOnMinuteChangeListener(onMinuteChangeListener: OnMinuteChangeListener?) {
+        onMinuteChangeListeners.remove(onMinuteChangeListener)
+    }
+
+    fun addOnSecondChangeListener(onSecondChangeListener: OnSecondChangeListener) {
+        onSecondChangeListeners.add(onSecondChangeListener)
+    }
+
+    fun removeOnSecondChangeListener(onSecondChangeListener: OnSecondChangeListener?) {
+        onSecondChangeListeners.remove(onSecondChangeListener)
+    }
+
+    fun addOnTimeChangeListener(onTimeChangeListener: OnTimeChangeListener) {
+        onTimeChangeListeners.add(onTimeChangeListener)
+    }
+
+    fun removeOnTimeChangeListener(onTimeChangeListener: OnTimeChangeListener?) {
+        onTimeChangeListeners.remove(onTimeChangeListener)
+    }
+
+    interface OnHourChangeListener {
+        fun onHourChange(currentHour: Int)
+    }
+
+    interface OnMinuteChangeListener {
+        fun onMinuteChange(currentMinute: Int)
+    }
+
+    interface OnSecondChangeListener {
+        fun onSecondChange(currentSecond: Int)
+    }
+
+    interface OnTimeChangeListener {
+        fun onHourChange(currentHour: Int)
+        fun onMinuteChange(currentMinute: Int)
+        fun onSecondChange(currentSecond: Int)
+    }
+}

app/src/main/java/com/meloda/fast/common/UpdateManager.kt

@@ -0,0 +1,80 @@
+package com.meloda.fast.common
+
+import android.util.Log
+import androidx.collection.arrayMapOf
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.model.NewUpdateInfo
+import com.meloda.fast.net.HttpRequest
+import org.json.JSONArray
+import org.json.JSONObject
+
+object UpdateManager {
+
+    interface OnUpdateListener {
+        fun onNewUpdate(updateInfo: NewUpdateInfo)
+
+        fun onNoUpdates()
+    }
+
+    private const val checkLink = "https://melodev.procsec.top/vkm/project_vkm_ota.json"
+
+    private const val PRODUCT_NAME = "project_vkm"
+    private const val BRANCH = "alpha"
+    private const val OFFSET = 0
+
+    private const val TAG = "UpdateManager"
+
+    fun checkUpdates(onUpdateListener: OnUpdateListener) {
+        TaskManager.execute {
+            val newLink = "https://temply.procsec.top/prop/deploy/api/method/getOTA"
+
+            val params = arrayMapOf<String, String>()
+            params["product"] = PRODUCT_NAME
+            params["branch"] = BRANCH
+            params["offset"] = OFFSET.toString()
+            params["code"] = AppGlobal.versionCode.toString()
+
+            if (BuildConfig.DEBUG) {
+                Log.d(TAG, "Request started")
+            }
+
+            HttpRequest[newLink, params].asString().let {
+                AppGlobal.post {
+                    if (BuildConfig.DEBUG) {
+                        Log.d(TAG, "response: $it")
+                    }
+
+                    val response: Any = if (it == "[]") JSONArray(it) else JSONObject(it)
+
+                    val newUpdateInfo: NewUpdateInfo? =
+                        if (response is JSONArray) null else NewUpdateInfo(response as JSONObject)
+
+                    if (response is JSONArray || newUpdateInfo?.version?.isEmpty() == true || newUpdateInfo?.version == AppGlobal.versionName) {
+                        onUpdateListener.onNoUpdates()
+                        return@post
+                    } else {
+                        newUpdateInfo?.let { onUpdateListener.onNewUpdate(it) }
+                    }
+                }
+            }
+
+//            HttpRequest[checkLink].asString().let {
+//                val response = JSONObject(it)
+//
+//                val updateInfo = UpdateInfo(response)
+//
+//                AppGlobal.handler.post {
+//                    if (updateInfo.version.isEmpty() || updateInfo.version == AppGlobal.versionName) {
+//                        onUpdateListener.onNoUpdates()
+//                        return@post
+//                    }
+//
+//                    if (AppGlobal.versionName != updateInfo.version) {
+//                        onUpdateListener.onNewUpdate(updateInfo)
+//                    }
+//                }
+//            }
+        }
+    }
+
+}

app/src/main/java/com/meloda/fast/concurrent/LowThread.kt

@@ -0,0 +1,12 @@
+package com.meloda.fast.concurrent
+
+import android.os.Process
+
+class LowThread(runnable: Runnable?) : Thread(runnable) {
+
+    override fun run() {
+        Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND)
+        super.run()
+    }
+
+}

app/src/main/java/com/meloda/fast/database/AppDatabase.kt

@@ -0,0 +1,20 @@
+package com.meloda.fast.database
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+import com.meloda.fast.api.model.*
+import com.meloda.fast.database.dao.*
+
+@Database(
+    entities = [VKConversation::class, VKMessage::class, VKUser::class, VKGroup::class, VKFriend::class],
+    version = 1,
+    exportSchema = false
+)
+
+abstract class AppDatabase : RoomDatabase() {
+    abstract val conversations: ConversationsDao
+    abstract val messages: MessagesDao
+    abstract val users: UsersDao
+    abstract val groups: GroupsDao
+    abstract val friends: FriendsDao
+}

app/src/main/java/com/meloda/fast/database/MemoryCache.kt

@@ -0,0 +1,176 @@
+package com.meloda.fast.database
+
+import android.util.SparseArray
+import androidx.annotation.WorkerThread
+import com.meloda.fast.api.model.*
+import com.meloda.fast.common.AppGlobal
+
+object MemoryCache {
+
+    private val users = SparseArray<VKUser>()
+    private val groups = SparseArray<VKGroup>()
+
+    @WorkerThread
+    fun getUserById(id: Int): VKUser? {
+        var user = users[id]
+        if (user == null) {
+            user = AppGlobal.database.users.getById(id)
+
+            user?.let { append(it) }
+        }
+        return user
+    }
+
+    @WorkerThread
+    fun getGroupById(positiveId: Int): VKGroup? {
+        var group = groups[positiveId]
+        if (group == null) {
+            group = AppGlobal.database.groups.getById(positiveId)
+
+            group?.let { append(it) }
+        }
+        return group
+    }
+
+    @WorkerThread
+    fun getMessageById(id: Int): VKMessage? {
+        return AppGlobal.database.messages.getById(id)
+    }
+
+    @WorkerThread
+    fun getMessagesByPeerId(peerId: Int): List<VKMessage> {
+        return AppGlobal.database.messages.getByPeerId(peerId)
+    }
+
+    @WorkerThread
+    fun getMessages(): List<VKMessage> {
+        return AppGlobal.database.messages.getAll()
+    }
+
+    @WorkerThread
+    fun getConversationById(id: Int): VKConversation? {
+        return AppGlobal.database.conversations.getById(id)
+    }
+
+    @WorkerThread
+    fun getConversations(): List<VKConversation> {
+        return AppGlobal.database.conversations.getAll()
+    }
+
+    @WorkerThread
+    fun getFriends(userId: Int): List<VKFriend> {
+        return AppGlobal.database.friends.getByUserId(userId)
+    }
+
+    fun appendUsers(users: Collection<VKUser>) {
+        for (user in users) {
+            append(user)
+        }
+    }
+
+    fun appendGroups(groups: Collection<VKGroup>) {
+        for (group in groups) {
+            append(group)
+        }
+    }
+
+    fun append(value: VKGroup) {
+        groups.append(value.groupId, value)
+    }
+
+    fun append(value: VKUser) {
+        users.append(value.userId, value)
+    }
+
+    @WorkerThread
+    fun put(value: VKUser) {
+        append(value)
+
+        AppGlobal.database.users.insert(value)
+    }
+
+    @WorkerThread
+    fun putUsers(users: List<VKUser>) {
+        appendUsers(users)
+
+        AppGlobal.database.users.insert(users)
+    }
+
+    @WorkerThread
+    fun put(value: VKFriend) {
+        AppGlobal.database.friends.insert(value)
+    }
+
+    @WorkerThread
+    fun putFriends(friends: List<VKFriend>) {
+        AppGlobal.database.friends.insert(friends)
+    }
+
+    @WorkerThread
+    fun put(value: VKMessage) {
+        AppGlobal.database.messages.insert(value)
+    }
+
+    @WorkerThread
+    fun putMessages(messages: List<VKMessage>) {
+        AppGlobal.database.messages.insert(messages)
+    }
+
+    @WorkerThread
+    fun put(value: VKGroup) {
+        append(value)
+
+        AppGlobal.database.groups.insert(value)
+    }
+
+    @WorkerThread
+    fun putGroups(groups: List<VKGroup>) {
+        appendGroups(groups)
+
+        AppGlobal.database.groups.insert(groups)
+    }
+
+    @WorkerThread
+    fun put(value: VKConversation) {
+        AppGlobal.database.conversations.insert(value)
+    }
+
+    @WorkerThread
+    fun putConversations(conversations: List<VKConversation>) {
+        AppGlobal.database.conversations.insert(conversations)
+    }
+
+    @WorkerThread
+    fun deleteMessage(messageId: Int, safe: Boolean = true) {
+        if (safe) {
+            AppGlobal.database.messages.getById(messageId) ?: return
+        }
+
+        AppGlobal.database.messages.deleteById(messageId)
+    }
+
+    @WorkerThread
+    fun deleteConversation(conversationId: Int, safe: Boolean = true) {
+        if (safe) {
+            AppGlobal.database.conversations.getById(conversationId) ?: return
+        }
+
+        AppGlobal.database.conversations.deleteById(conversationId)
+    }
+
+    @WorkerThread
+    fun edit(message: VKMessage?, safe: Boolean = true) {
+        message ?: return
+
+        if (safe) {
+            AppGlobal.database.messages.getById(message.messageId) ?: return
+        }
+
+        AppGlobal.database.messages.update(message)
+    }
+
+    fun clear() {
+        users.clear()
+        groups.clear()
+    }
+}

app/src/main/java/com/meloda/fast/database/dao/ConversationsDao.kt

@@ -0,0 +1,38 @@
+package com.meloda.fast.database.dao
+
+import androidx.room.*
+import com.meloda.fast.api.model.VKConversation
+
+@Dao
+interface ConversationsDao {
+
+    @Query("SELECT * FROM conversations")
+    fun getAll(): List<VKConversation>
+
+    @Query("SELECT * FROM conversations WHERE conversationId = :id")
+    fun getById(id: Int): VKConversation?
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(item: VKConversation)
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(items: List<VKConversation>)
+
+    @Update
+    fun update(item: VKConversation)
+
+    @Update
+    fun update(items: List<VKConversation>)
+
+    @Delete
+    fun delete(item: VKConversation)
+
+    @Delete
+    fun delete(items: List<VKConversation>)
+
+    @Query("DELETE FROM conversations WHERE conversationId = :id")
+    fun deleteById(id: Int)
+
+    @Query("DELETE FROM conversations")
+    fun clear()
+}

app/src/main/java/com/meloda/fast/database/dao/FriendsDao.kt

@@ -0,0 +1,41 @@
+package com.meloda.fast.database.dao
+
+import androidx.room.*
+import com.meloda.fast.api.model.VKFriend
+
+@Dao
+interface FriendsDao {
+
+    @Query("SELECT * FROM friends")
+    fun getAll(): List<VKFriend>
+
+    @Query("SELECT * FROM friends WHERE userId = :id")
+    fun getById(id: Int): VKFriend?
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(item: VKFriend)
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(items: List<VKFriend>)
+
+    @Update
+    fun update(item: VKFriend)
+
+    @Update
+    fun update(items: List<VKFriend>)
+
+    @Delete
+    fun delete(item: VKFriend)
+
+    @Delete
+    fun delete(items: List<VKFriend>)
+
+    @Query("DELETE FROM friends WHERE userId = :id")
+    fun deleteById(id: Int)
+
+    @Query("DELETE FROM friends")
+    fun clear()
+
+    @Query("SELECT * FROM friends WHERE userId = :id")
+    fun getByUserId(id: Int): List<VKFriend>
+}

app/src/main/java/com/meloda/fast/database/dao/GroupsDao.kt

@@ -0,0 +1,37 @@
+package com.meloda.fast.database.dao
+
+import androidx.room.*
+import com.meloda.fast.api.model.VKGroup
+
+@Dao
+interface GroupsDao {
+    @Query("SELECT * FROM groups")
+    fun getAll(): List<VKGroup>
+
+    @Query("SELECT * FROM groups WHERE groupId = :id")
+    fun getById(id: Int): VKGroup?
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(item: VKGroup)
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(items: List<VKGroup>)
+
+    @Update
+    fun update(item: VKGroup)
+
+    @Update
+    fun update(items: List<VKGroup>)
+
+    @Delete
+    fun delete(item: VKGroup)
+
+    @Delete
+    fun delete(items: List<VKGroup>)
+
+    @Query("DELETE FROM groups WHERE groupId = :id")
+    fun deleteById(id: Int)
+
+    @Query("DELETE FROM groups")
+    fun clear()
+}

app/src/main/java/com/meloda/fast/database/dao/MessagesDao.kt

@@ -0,0 +1,41 @@
+package com.meloda.fast.database.dao
+
+import androidx.room.*
+import com.meloda.fast.api.model.VKMessage
+
+@Dao
+interface MessagesDao {
+
+    @Query("SELECT * FROM messages")
+    fun getAll(): List<VKMessage>
+
+    @Query("SELECT * FROM messages WHERE messageId = :id")
+    fun getById(id: Int): VKMessage?
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(item: VKMessage)
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(items: List<VKMessage>)
+
+    @Update
+    fun update(item: VKMessage)
+
+    @Update
+    fun update(items: List<VKMessage>)
+
+    @Delete
+    fun delete(item: VKMessage)
+
+    @Delete
+    fun delete(items: List<VKMessage>)
+
+    @Query("DELETE FROM messages WHERE messageId = :id")
+    fun deleteById(id: Int)
+
+    @Query("DELETE FROM messages")
+    fun clear()
+
+    @Query("SELECT * FROM messages WHERE peerId = :peerId")
+    fun getByPeerId(peerId: Int): List<VKMessage>
+}

app/src/main/java/com/meloda/fast/database/dao/UsersDao.kt

@@ -0,0 +1,38 @@
+package com.meloda.fast.database.dao
+
+import androidx.room.*
+import com.meloda.fast.api.model.VKUser
+
+@Dao
+interface UsersDao {
+
+    @Query("SELECT * FROM users")
+    fun getAll(): List<VKUser>
+
+    @Query("SELECT * FROM users WHERE userId = :id")
+    fun getById(id: Int): VKUser?
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(item: VKUser)
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(items: List<VKUser>)
+
+    @Update
+    fun update(item: VKUser)
+
+    @Update
+    fun update(items: List<VKUser>)
+
+    @Delete
+    fun delete(item: VKUser)
+
+    @Delete
+    fun delete(items: List<VKUser>)
+
+    @Query("DELETE FROM users WHERE userId = :id")
+    fun deleteById(id: Int)
+
+    @Query("DELETE FROM users")
+    fun clear()
+}

app/src/main/java/com/meloda/fast/database/dao/converters/ArrayListToByteArrayConverter.kt

@@ -0,0 +1,24 @@
+package com.meloda.fast.database.dao.converters
+
+import androidx.room.TypeConverter
+import com.meloda.fast.api.model.VKModel
+import com.meloda.fast.extensions.ArrayExtensions.isNullOrEmpty
+import com.meloda.fast.util.Utils
+
+@Suppress("UNCHECKED_CAST")
+class ArrayListToByteArrayConverter {
+
+    @TypeConverter
+    fun toForwarded(data: ByteArray?): ArrayList<VKModel> {
+        return if (data.isNullOrEmpty()) arrayListOf() else {
+            val deserializedData = Utils.deserialize(data)
+            if (deserializedData == null) arrayListOf() else deserializedData as ArrayList<VKModel>
+        }
+    }
+
+    @TypeConverter
+    fun fromForwarded(forwarded: List<VKModel>): ByteArray {
+        return Utils.serialize(forwarded) ?: return byteArrayOf()
+    }
+
+}

app/src/main/java/com/meloda/fast/database/dao/converters/ForwardedConverter.kt

@@ -0,0 +1,25 @@
+package com.meloda.fast.database.dao.converters
+
+import androidx.room.TypeConverter
+import com.meloda.fast.api.model.VKMessage
+import com.meloda.fast.extensions.ArrayExtensions.isNullOrEmpty
+import com.meloda.fast.util.Utils
+import java.util.*
+
+@Suppress("UNCHECKED_CAST")
+class ForwardedConverter {
+
+    @TypeConverter
+    fun toForwarded(data: ByteArray?): ArrayList<VKMessage> {
+        return if (data.isNullOrEmpty()) arrayListOf() else {
+            val deserializedData = Utils.deserialize(data)
+            if (deserializedData == null) arrayListOf() else deserializedData as ArrayList<VKMessage>
+        }
+    }
+
+    @TypeConverter
+    fun fromForwarded(forwarded: List<VKMessage>): ByteArray {
+        return Utils.serialize(forwarded) ?: return byteArrayOf()
+    }
+
+}

app/src/main/java/com/meloda/fast/dialog/AccountDialog.kt

@@ -0,0 +1,117 @@
+package com.meloda.fast.dialog
+
+import android.content.Intent
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.RelativeLayout
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import com.meloda.fast.R
+import com.meloda.fast.activity.SettingsActivity
+import com.meloda.fast.adapter.SimpleItemAdapter
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.base.BaseFullscreenDialog
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.extensions.ContextExtensions.color
+import com.meloda.fast.extensions.ContextExtensions.drawable
+import com.meloda.fast.extensions.DrawableExtensions.tint
+import com.meloda.fast.extensions.FragmentExtensions.findViewById
+import com.meloda.fast.item.SimpleMenuItem
+import com.meloda.fast.listener.ItemClickListener
+import com.meloda.fast.util.AndroidUtils
+import com.meloda.fast.util.ColorUtils
+import com.meloda.fast.util.ViewUtils
+import com.meloda.fast.widget.Toolbar
+
+class AccountDialog : BaseFullscreenDialog(), ItemClickListener {
+
+    companion object {
+        const val TAG = "account_fullscreen_dialog"
+    }
+
+    private lateinit var adapter: SimpleItemAdapter
+
+    private lateinit var toolbar: Toolbar
+    private lateinit var recyclerView: RecyclerView
+    private lateinit var refreshLayout: SwipeRefreshLayout
+    private lateinit var headerRoot: RelativeLayout
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.dialog_account, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        initViews()
+        prepareToolbar()
+        prepareRecyclerView()
+    }
+
+    private fun initViews() {
+        toolbar = findViewById(R.id.toolbar)
+        recyclerView = findViewById(R.id.recyclerView)
+        refreshLayout = findViewById(R.id.refreshLayout)
+        headerRoot = findViewById(R.id.headerRoot)
+    }
+
+    private fun prepareToolbar() {
+        toolbar.navigationIcon = requireContext().drawable(R.drawable.ic_close)
+            .tint(ColorUtils.getColorAccent(requireContext()))
+
+
+        toolbar.setTitle(R.string.account_dialog_title)
+        toolbar.setTitleMode(Toolbar.TitleMode.SIMPLE)
+        toolbar.setNavigationClickListener { dismiss() }
+
+        MemoryCache.getUserById(UserConfig.userId)?.let {
+            AppGlobal.handler.post { ViewUtils.prepareNavigationHeader(headerRoot, it) }
+        }
+    }
+
+    private fun prepareRecyclerView() {
+        refreshLayout.isEnabled = false
+
+        recyclerView.layoutManager =
+            LinearLayoutManager(requireContext(), RecyclerView.VERTICAL, false)
+        recyclerView.setHasFixedSize(true)
+
+        createItemsAndAdapter()
+    }
+
+    private fun createItemsAndAdapter() {
+        val items = arrayListOf<SimpleMenuItem>()
+
+        SimpleMenuItem(
+            requireContext().drawable(R.drawable.ic_settings_outline)
+                .tint(ColorUtils.getColorAccent(requireContext())),
+            requireContext().getString(R.string.navigation_settings)
+        ) { openSettingsScreen() }.let { items.add(it) }
+
+        adapter = SimpleItemAdapter(requireContext(), items).also {
+            it.itemClickListener = this
+        }
+
+        recyclerView.adapter = adapter
+    }
+
+    private fun openSettingsScreen() {
+        startActivity(Intent(requireContext(), SettingsActivity::class.java))
+    }
+
+    override fun onItemClick(position: Int) {
+        val item = adapter.getItem(position)
+
+        item.clickListener?.let {
+            it.onClick(requireView().findViewById(android.R.id.content))
+            dismiss()
+        }
+    }
+
+}

app/src/main/java/com/meloda/fast/dialog/ProfileDialog.kt

@@ -0,0 +1,115 @@
+package com.meloda.fast.dialog
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.core.content.ContextCompat
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.google.android.material.bottomsheet.BottomSheetDialogFragment
+import com.meloda.fast.R
+import com.meloda.fast.adapter.SimpleItemAdapter
+import com.meloda.fast.api.model.VKConversation
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.item.SimpleMenuItem
+
+open class ProfileDialog(
+    private val conversation: VKConversation,
+    private val chatTitle: String
+) : BottomSheetDialogFragment() {
+
+    companion object {
+        const val TAG = "profile_bottom_sheet_dialog"
+    }
+
+    private lateinit var title: TextView
+    private lateinit var subtitle: TextView
+    private lateinit var recyclerView: RecyclerView
+    private lateinit var root: LinearLayout
+
+    private var adapter: SimpleItemAdapter? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setStyle(STYLE_NO_TITLE, R.style.AppTheme_ProfileDialog)
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.dialog_profile_bottom, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        title = view.findViewById(R.id.profileTitle)
+        subtitle = view.findViewById(R.id.profileSubtitle)
+        recyclerView = view.findViewById(R.id.profileItemMenu)
+        root = view.findViewById(R.id.profileRoot)
+
+        val layoutManager = LinearLayoutManager(requireContext(), RecyclerView.VERTICAL, false)
+
+        recyclerView.layoutManager = layoutManager
+
+        title.text = chatTitle
+
+        subtitle.text = getSubtitle()
+
+        val items = ArrayList<SimpleMenuItem>()
+
+        items.add(
+            SimpleMenuItem(
+                ContextCompat.getDrawable(
+                    requireContext(),
+                    R.drawable.ic_search
+                )!!, "Search"
+            )
+        )
+
+        createAdapter(items)
+    }
+
+    private fun createAdapter(items: ArrayList<SimpleMenuItem>) {
+        adapter = SimpleItemAdapter(requireContext(), items)
+        recyclerView.adapter = adapter
+    }
+
+    private fun getSubtitle(): String {
+        return when (conversation.type) {
+            VKConversation.TYPE_CHAT -> getString(
+                R.string.chat_members,
+                conversation.membersCount
+            )
+            VKConversation.TYPE_GROUP -> {
+                val group = MemoryCache.getGroupById(conversation.conversationId) ?: return ""
+
+                "@${group.screenName}"
+            }
+            VKConversation.TYPE_USER -> {
+//                    val user = MemoryCache.getUserById(conversation.id) ?: return ""
+
+                //TODO: придумать чо делать
+                val user: VKUser = null ?: return ""
+
+                var str =
+                    if (user.screenName.contains("id${user.userId}")) "" else "@${user.screenName}"
+
+                val online =
+                    getString(if (user.isOnlineMobile) R.string.user_online_mobile else if (user.isOnline) R.string.user_online else R.string.user_offline)
+
+                str += if (str.isEmpty()) online else " · $online"
+
+                str
+            }
+            else -> ""
+        }
+    }
+}

app/src/main/java/com/meloda/fast/event/EventInfo.kt

@@ -0,0 +1,5 @@
+package com.meloda.fast.event
+
+import com.meloda.fast.api.VKApiKeys
+
+class EventInfo<T> constructor(var key: VKApiKeys, var data: T? = null)

app/src/main/java/com/meloda/fast/extensions/ArrayExtensions.kt

@@ -0,0 +1,11 @@
+package com.meloda.fast.extensions
+
+object ArrayExtensions {
+
+    fun ByteArray?.isNullOrEmpty() = this == null || this.isEmpty()
+
+    fun <E> List<E>.asArrayList(): ArrayList<E> {
+        return ArrayList(this)
+    }
+
+}

app/src/main/java/com/meloda/fast/extensions/ContextExtensions.kt

@@ -0,0 +1,37 @@
+package com.meloda.fast.extensions
+
+import android.content.Context
+import android.graphics.Typeface
+import android.graphics.drawable.Drawable
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.annotation.*
+import androidx.core.content.ContextCompat
+import androidx.core.content.res.ResourcesCompat
+
+object ContextExtensions {
+
+    fun Context.drawable(@DrawableRes resId: Int): Drawable? {
+        return ContextCompat.getDrawable(this, resId)
+    }
+
+    @ColorInt
+    fun Context.color(@ColorRes resId: Int): Int {
+        return ContextCompat.getColor(this, resId)
+    }
+
+    fun Context.font(@FontRes resId: Int): Typeface? {
+        return ResourcesCompat.getFont(this, resId)
+    }
+
+    fun Context.string(@StringRes resId: Int): String {
+        return getString(resId)
+    }
+
+    fun Context.view(resId: Int, root: ViewGroup? = null, attachToRoot: Boolean = false): View {
+        return LayoutInflater.from(this).inflate(resId, root, attachToRoot)
+    }
+
+
+}

app/src/main/java/com/meloda/fast/extensions/DrawableExtensions.kt

@@ -0,0 +1,13 @@
+package com.meloda.fast.extensions
+
+import android.graphics.drawable.Drawable
+import androidx.annotation.ColorInt
+
+object DrawableExtensions {
+
+    fun Drawable?.tint(@ColorInt color: Int): Drawable? {
+        this?.setTint(color)
+        return this
+    }
+
+}

app/src/main/java/com/meloda/fast/extensions/FloatExtensions.kt

@@ -0,0 +1,11 @@
+package com.meloda.fast.extensions
+
+import kotlin.math.roundToInt
+
+object FloatExtensions {
+
+    fun Float.int(): Int {
+        return roundToInt()
+    }
+
+}

app/src/main/java/com/meloda/fast/extensions/FragmentExtensions.kt

@@ -0,0 +1,16 @@
+package com.meloda.fast.extensions
+
+import android.view.View
+import androidx.fragment.app.Fragment
+
+object FragmentExtensions {
+
+    fun <T : View> Fragment.findViewById(resId: Int): T {
+        return requireView().findViewById(resId)
+    }
+
+    fun Fragment.runOnUiThread(runnable: Runnable) {
+        activity?.runOnUiThread(runnable)
+    }
+
+}

app/src/main/java/com/meloda/fast/extensions/ImageViewExtensions.kt

@@ -0,0 +1,55 @@
+package com.meloda.fast.extensions
+
+import android.graphics.drawable.Drawable
+import android.util.Log
+import android.widget.ImageView
+import com.meloda.fast.BuildConfig
+import com.squareup.picasso.Callback
+import com.squareup.picasso.Picasso
+
+object ImageViewExtensions {
+
+    fun ImageView.loadImage(
+        sourceUrl: String,
+        placeholder: Drawable? = null,
+        callback: Callback? = null
+    ) {
+        if (sourceUrl.trim().isEmpty()) {
+            if (BuildConfig.DEBUG) {
+                Log.d("ImageView", "sourceUrl is empty")
+            }
+            return
+        }
+
+        val builder = Picasso.get().load(sourceUrl)
+
+        placeholder?.let { builder.placeholder(it) }
+
+        try {
+            builder.into(this, object : Callback {
+                override fun onSuccess() {
+                    if (BuildConfig.DEBUG) {
+                        Log.d("ImageView", "loaded photo from $sourceUrl")
+                    }
+
+                    callback?.onSuccess()
+                }
+
+                override fun onError(e: Exception?) {
+                    if (BuildConfig.DEBUG) {
+                        Log.d("ImageView", "error loading photo from $sourceUrl")
+                    }
+
+                    callback?.onError(e)
+                }
+            })
+        } catch (e: Exception) {
+            e.printStackTrace()
+
+            if (BuildConfig.DEBUG) {
+                Log.d("ImageView", "Error loading photo from $sourceUrl")
+            }
+        }
+    }
+
+}

app/src/main/java/com/meloda/fast/extensions/StringExtensions.kt

@@ -0,0 +1,11 @@
+package com.meloda.fast.extensions
+
+import java.util.*
+
+object StringExtensions {
+
+    fun String.lowerCase(): String {
+        return toLowerCase(Locale.getDefault())
+    }
+
+}

app/src/main/java/com/meloda/fast/extensions/TextViewExtensions.kt

@@ -0,0 +1,17 @@
+package com.meloda.fast.extensions
+
+import android.widget.TextView
+import com.google.android.material.textfield.TextInputLayout
+
+object TextViewExtensions {
+
+    fun TextView.clear() {
+        text = ""
+    }
+
+    fun TextInputLayout.clear() {
+        editText?.setText("")
+    }
+
+
+}

app/src/main/java/com/meloda/fast/fragment/FragmentConversations.kt

@@ -0,0 +1,181 @@
+package com.meloda.fast.fragment
+
+import android.content.Intent
+import android.graphics.drawable.ColorDrawable
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.LinearLayout
+import android.widget.ProgressBar
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import com.meloda.fast.R
+import com.meloda.fast.activity.MessagesActivity
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.api.VKApiKeys
+import com.meloda.fast.base.BaseFragment
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.event.EventInfo
+import com.meloda.fast.extensions.FragmentExtensions.findViewById
+import com.meloda.fast.extensions.FragmentExtensions.runOnUiThread
+import com.meloda.fast.fragment.ui.presenter.ConversationsPresenter
+import com.meloda.fast.fragment.ui.view.ConversationsView
+import com.meloda.fast.util.AndroidUtils
+import com.meloda.fast.util.ViewUtils
+import com.meloda.fast.widget.Toolbar
+
+
+@Suppress("UNCHECKED_CAST")
+class FragmentConversations : BaseFragment(), ConversationsView {
+
+    private lateinit var presenter: ConversationsPresenter
+
+    private lateinit var toolbar: Toolbar
+    private lateinit var refreshLayout: SwipeRefreshLayout
+    private lateinit var recyclerView: RecyclerView
+    private lateinit var progressBar: ProgressBar
+
+    private lateinit var noItemsView: LinearLayout
+    private lateinit var noInternetView: LinearLayout
+    private lateinit var errorView: LinearLayout
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? = inflater.inflate(R.layout.fragment_conversations, container, false)
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        initViews()
+
+        prepareToolbar()
+        prepareRecyclerView()
+        prepareRefreshLayout()
+
+        presenter = ConversationsPresenter(this)
+        presenter.setup(recyclerView, refreshLayout)
+    }
+
+    private fun initViews() {
+        toolbar = findViewById(R.id.toolbar)
+        recyclerView = findViewById(R.id.recyclerView)
+        refreshLayout = findViewById(R.id.refreshLayout)
+        progressBar = findViewById(R.id.progressBar)
+
+        noItemsView = findViewById(R.id.noItemsView)
+        noInternetView = findViewById(R.id.noInternetView)
+        errorView = findViewById(R.id.errorView)
+    }
+
+    private fun prepareToolbar() {
+        initToolbar(R.id.toolbar)
+        toolbar.title = getString(R.string.navigation_conversations)
+        setProfileAvatar()
+
+        TaskManager.addOnEventListener(object : TaskManager.OnEventListener {
+            override fun onNewEvent(info: EventInfo<*>) {
+                if (info.key == VKApiKeys.UPDATE_USER) {
+                    val userIds = info.data as ArrayList<Int>
+
+                    if (userIds.contains(UserConfig.userId)) {
+                        setProfileAvatar()
+                    }
+                }
+            }
+        })
+    }
+
+    private fun prepareRefreshLayout() {
+        refreshLayout.setColorSchemeResources(R.color.accent)
+    }
+
+    private fun prepareRecyclerView() {
+        val manager = LinearLayoutManager(requireContext(), RecyclerView.VERTICAL, false)
+
+        val decoration = DividerItemDecoration(requireContext(), DividerItemDecoration.VERTICAL)
+
+        decoration.setDrawable(
+            ColorDrawable(AndroidUtils.getThemeAttrColor(requireContext(), R.attr.dividerHorizontal))
+        )
+
+        recyclerView.itemAnimator = null
+        recyclerView.addItemDecoration(decoration)
+
+        recyclerView.layoutManager = manager
+    }
+
+    private fun setProfileAvatar() {
+        TaskManager.execute {
+            AppGlobal.database.users.getById(UserConfig.userId)?.let {
+                if (it.photo100.isNotEmpty()) {
+                    runOnUiThread {
+                        toolbar.getAvatar().setImageURI(it.photo100)
+                    }
+                }
+            }
+        }
+    }
+
+    override fun openChat(extras: Bundle) {
+        startActivity(Intent(requireContext(), MessagesActivity::class.java).putExtras(extras))
+    }
+
+    override fun showErrorSnackbar(t: Throwable) {
+        ViewUtils.showErrorSnackbar(requireView(), t)
+    }
+
+    override fun prepareNoItemsView() {
+    }
+
+    override fun showNoItemsView() {
+        noItemsView.isVisible = true
+    }
+
+    override fun hideNoItemsView() {
+        noItemsView.isVisible = false
+    }
+
+    override fun prepareNoInternetView() {
+    }
+
+    override fun showNoInternetView() {
+        noInternetView.isVisible = true
+    }
+
+    override fun hideNoInternetView() {
+        noInternetView.isVisible = false
+    }
+
+    override fun prepareErrorView() {
+
+    }
+
+    override fun showErrorView() {
+        errorView.isVisible = true
+    }
+
+    override fun hideErrorView() {
+        errorView.isVisible = false
+    }
+
+    override fun showProgressBar() {
+        progressBar.isVisible = true
+    }
+
+    override fun hideProgressBar() {
+        progressBar.isVisible = false
+    }
+
+    override fun showRefreshLayout() {
+        refreshLayout.isRefreshing = true
+    }
+
+    override fun hideRefreshLayout() {
+        refreshLayout.isRefreshing = false
+    }
+}

app/src/main/java/com/meloda/fast/fragment/FragmentFriends.kt

@@ -0,0 +1,191 @@
+package com.meloda.fast.fragment
+
+import android.content.Intent
+import android.graphics.drawable.ColorDrawable
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.LinearLayout
+import android.widget.ProgressBar
+import androidx.core.content.ContextCompat
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import com.meloda.fast.R
+import com.meloda.fast.activity.MessagesActivity
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.api.VKApiKeys
+import com.meloda.fast.base.BaseFragment
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.event.EventInfo
+import com.meloda.fast.extensions.FragmentExtensions.findViewById
+import com.meloda.fast.fragment.ui.presenter.FriendsPresenter
+import com.meloda.fast.fragment.ui.view.FriendsView
+import com.meloda.fast.util.ViewUtils
+import com.meloda.fast.widget.Toolbar
+
+class FragmentFriends(private val userId: Int = 0) : BaseFragment(), FriendsView {
+
+    private lateinit var presenter: FriendsPresenter
+
+    private lateinit var toolbar: Toolbar
+    private lateinit var recyclerView: RecyclerView
+    private lateinit var refreshLayout: SwipeRefreshLayout
+    private lateinit var progressBar: ProgressBar
+
+    private lateinit var noItemsView: LinearLayout
+    private lateinit var noInternetView: LinearLayout
+    private lateinit var errorView: LinearLayout
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_friends, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        initViews()
+
+        prepareToolbar()
+        prepareRecyclerView()
+        prepareRefreshLayout()
+
+        presenter = FriendsPresenter(this)
+        presenter.setup(userId, recyclerView, refreshLayout)
+    }
+
+    private fun initViews() {
+        toolbar = findViewById(R.id.toolbar)
+        recyclerView = findViewById(R.id.recyclerView)
+        refreshLayout = findViewById(R.id.refreshLayout)
+        progressBar = findViewById(R.id.progressBar)
+
+        noItemsView = findViewById(R.id.noItemsView)
+        noInternetView = findViewById(R.id.noInternetView)
+        errorView = findViewById(R.id.errorView)
+    }
+
+    private fun prepareToolbar() {
+        initToolbar(R.id.toolbar)
+        toolbar.title = getString(R.string.navigation_friends)
+        setProfileAvatar()
+
+        toolbar.inflateMenu(R.menu.fragment_friends)
+
+        TaskManager.addOnEventListener(object : TaskManager.OnEventListener {
+            override fun onNewEvent(info: EventInfo<*>) {
+                if (info.key == VKApiKeys.UPDATE_USER) {
+                    val userId = info.data as ArrayList<Int>
+
+                    if (userId[0] == UserConfig.userId) {
+                        setProfileAvatar()
+                    }
+                }
+            }
+        })
+    }
+
+    private fun setProfileAvatar() {
+        TaskManager.execute {
+            AppGlobal.database.users.getById(UserConfig.userId)?.let {
+                if (it.photo100.isNotEmpty()) {
+                    runOnUi {
+                        toolbar.getAvatar().setImageURI(it.photo100)
+                    }
+                }
+            }
+        }
+    }
+
+    override fun onDetach() {
+        presenter.destroy()
+        super.onDetach()
+    }
+
+    private fun prepareRefreshLayout() {
+        refreshLayout.setColorSchemeResources(R.color.accent)
+    }
+
+    private fun prepareRecyclerView() {
+        val manager = LinearLayoutManager(requireContext(), RecyclerView.VERTICAL, false)
+
+        val decoration = DividerItemDecoration(requireContext(), DividerItemDecoration.VERTICAL)
+
+        decoration.setDrawable(
+            ColorDrawable(
+                ContextCompat.getColor(
+                    requireContext(),
+                    R.color.divider
+                )
+            )
+        )
+
+        recyclerView.addItemDecoration(decoration)
+        recyclerView.layoutManager = manager
+    }
+
+    override fun openChat(extras: Bundle) {
+        startActivity(Intent(requireContext(), MessagesActivity::class.java).putExtras(extras))
+    }
+
+    override fun showErrorSnackbar(t: Throwable) {
+        ViewUtils.showErrorSnackbar(requireView(), t)
+    }
+
+    override fun prepareNoItemsView() {
+    }
+
+    override fun showNoItemsView() {
+        noItemsView.isVisible = true
+    }
+
+    override fun hideNoItemsView() {
+        noItemsView.isVisible = false
+    }
+
+    override fun prepareNoInternetView() {
+    }
+
+    override fun showNoInternetView() {
+        noInternetView.isVisible = true
+    }
+
+    override fun hideNoInternetView() {
+        noInternetView.isVisible = false
+    }
+
+    override fun prepareErrorView() {
+    }
+
+    override fun showErrorView() {
+        errorView.isVisible = true
+    }
+
+    override fun hideErrorView() {
+        errorView.isVisible = false
+    }
+
+
+    override fun showProgressBar() {
+        progressBar.isVisible = true
+    }
+
+    override fun hideProgressBar() {
+        progressBar.isVisible = false
+    }
+
+    override fun showRefreshLayout() {
+        refreshLayout.isRefreshing = true
+    }
+
+    override fun hideRefreshLayout() {
+        refreshLayout.isRefreshing = false
+    }
+
+}

app/src/main/java/com/meloda/fast/fragment/FragmentImportant.kt

@@ -0,0 +1,21 @@
+package com.meloda.fast.fragment
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import com.meloda.fast.R
+import com.meloda.fast.base.BaseFragment
+
+
+class FragmentImportant : BaseFragment() {
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_important, container, false)
+    }
+
+}

app/src/main/java/com/meloda/fast/fragment/FragmentSearch.kt

@@ -0,0 +1,8 @@
+package com.meloda.fast.fragment
+
+import com.meloda.fast.base.BaseFragment
+
+class FragmentSearch : BaseFragment() {
+    inner class SearchConversations : BaseFragment()
+    inner class SearchMessages : BaseFragment()
+}

app/src/main/java/com/meloda/fast/fragment/FragmentSettings.kt

@@ -0,0 +1,218 @@
+package com.meloda.fast.fragment
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.PreferenceScreen
+import com.meloda.fast.R
+import com.meloda.fast.activity.DropUserDataActivity
+import com.meloda.fast.activity.UpdateActivity
+import com.meloda.fast.base.BaseActivity
+import com.meloda.fast.common.AppGlobal
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.extensions.ContextExtensions.color
+import com.meloda.fast.extensions.ContextExtensions.drawable
+import com.meloda.fast.util.AndroidUtils
+
+class FragmentSettings : PreferenceFragmentCompat(),
+    Preference.OnPreferenceClickListener,
+    Preference.OnPreferenceChangeListener {
+
+    companion object {
+
+        const val CATEGORY_GENERAL = "general"
+        const val KEY_HIDE_KEYBOARD_ON_SCROLL_UP = "hide_keyboard_on_scroll_up"
+
+        const val CATEGORY_APPEARANCE = "appearance"
+        const val KEY_EXTENDED_CONVERSATIONS = "appearance_extended_conversations"
+        const val KEY_THEME = "appearance_theme"
+
+        const val CATEGORY_ABOUT = "about"
+        const val KEY_APP_VERSION = "app_version"
+
+        const val CATEGORY_ACCOUNT = "account"
+        const val KEY_ACCOUNT_LOGOUT = "account_logout"
+
+        const val CATEGORY_DEBUG = "debug"
+        const val KEY_CLEAR_USERS_GROUPS_CACHE = "clear_users_groups_cache"
+    }
+
+    private var currentPreferenceLayout = 0
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        setPreferencesFromResource(R.xml.fragment_settings, rootKey)
+        currentPreferenceLayout = R.xml.fragment_settings
+        init()
+    }
+
+    private fun init() {
+        setTitle()
+        setNavigationIcon()
+        setPreferencesFromResource(currentPreferenceLayout, null)
+
+        val general = findPreference<Preference>(CATEGORY_GENERAL)
+        general?.onPreferenceClickListener = rootLayoutClickListener
+
+        val account = findPreference<Preference>(CATEGORY_ACCOUNT)
+        account?.onPreferenceClickListener = rootLayoutClickListener
+
+        val logout = findPreference<Preference>(KEY_ACCOUNT_LOGOUT)
+        logout?.onPreferenceClickListener = this
+
+        val about = findPreference<Preference>(CATEGORY_ABOUT)
+        about?.onPreferenceClickListener = rootLayoutClickListener
+
+        val appVersion = findPreference<Preference>(KEY_APP_VERSION)
+        appVersion?.onPreferenceClickListener = this
+
+        val appearance = findPreference<Preference>(CATEGORY_APPEARANCE)
+        appearance?.onPreferenceClickListener = rootLayoutClickListener
+
+        val extendedConversations = findPreference<Preference>(KEY_EXTENDED_CONVERSATIONS)
+        extendedConversations?.onPreferenceChangeListener = this
+
+        val theme = findPreference<Preference>(KEY_THEME)
+        theme?.onPreferenceChangeListener = this
+
+        val debug = findPreference<Preference>(CATEGORY_DEBUG)
+        debug?.onPreferenceClickListener = rootLayoutClickListener
+        updateDebugCategoryVisibility()
+
+        val clearUsersGroupsCache = findPreference<Preference>(KEY_CLEAR_USERS_GROUPS_CACHE)
+        clearUsersGroupsCache?.onPreferenceClickListener = this
+
+        applyTintInPreferenceScreen(preferenceScreen)
+    }
+
+    override fun onResume() {
+        super.onResume()
+
+        updateDebugCategoryVisibility()
+    }
+
+    private fun updateDebugCategoryVisibility() {
+        findPreference<Preference>(CATEGORY_DEBUG)?.isVisible =
+            AndroidUtils.isDeveloperSettingsEnabled(requireContext())
+    }
+
+    private val rootLayoutClickListener =
+        Preference.OnPreferenceClickListener { changeRootLayout(it) }
+
+    private fun setNavigationIcon() {
+        val drawable =
+            if (currentPreferenceLayout == R.xml.fragment_settings) null
+            else requireContext().drawable(R.drawable.ic_arrow_back)
+
+        drawable?.setTint(requireContext().color(R.color.accent))
+    }
+
+    private fun setTitle() {
+        var title = R.string.navigation_settings
+        when (currentPreferenceLayout) {
+            R.xml.fragment_settings_general -> title = R.string.prefs_general
+            R.xml.fragment_settings_appearance -> title = R.string.prefs_appearance
+            R.xml.fragment_settings_about -> title = R.string.prefs_about
+            R.xml.fragment_settings_account -> title = R.string.prefs_account
+        }
+        requireActivity().setTitle(title)
+    }
+
+    private fun changeRootLayout(preference: Preference): Boolean {
+        currentPreferenceLayout = when (preference.key) {
+            CATEGORY_GENERAL -> R.xml.fragment_settings_general
+            CATEGORY_ABOUT -> R.xml.fragment_settings_about
+            CATEGORY_ACCOUNT -> R.xml.fragment_settings_account
+            CATEGORY_APPEARANCE -> R.xml.fragment_settings_appearance
+            CATEGORY_DEBUG -> R.xml.fragment_settings_debug
+            else -> R.xml.fragment_settings
+        }
+
+        init()
+        return true
+    }
+
+    private fun applyTintInPreferenceScreen(rootScreen: PreferenceScreen) {
+        if (rootScreen.preferenceCount > 0) {
+            for (i in 0 until rootScreen.preferenceCount) {
+                val preference = rootScreen.getPreference(i)
+                tintPreference(preference)
+            }
+        }
+    }
+
+    private fun tintPreference(preference: Preference) {
+        if (preference.icon != null && context != null) {
+            preference.icon.setTint(requireContext().color(R.color.accent))
+        }
+    }
+
+    override fun onPreferenceClick(preference: Preference): Boolean {
+        when (preference.key) {
+            KEY_ACCOUNT_LOGOUT -> {
+                logout()
+                return true
+            }
+            KEY_APP_VERSION -> {
+                openUpdateScreen()
+                return true
+            }
+            KEY_CLEAR_USERS_GROUPS_CACHE -> {
+                showClearCacheConfirmation()
+            }
+        }
+        return false
+    }
+
+    private fun showClearCacheConfirmation() {
+        val builder = AlertDialog.Builder(requireContext())
+
+        builder.setMessage("Clear cache?")
+        builder.setPositiveButton("Yes") { _, _ ->
+            TaskManager.execute {
+                AppGlobal.database.users.clear()
+                AppGlobal.database.groups.clear()
+            }
+        }
+        builder.setNegativeButton("No", null)
+        builder.show()
+    }
+
+    private fun openUpdateScreen() {
+        startActivity(Intent(requireContext(), UpdateActivity::class.java))
+    }
+
+    override fun onPreferenceChange(preference: Preference, newValue: Any?): Boolean {
+        when (preference.key) {
+            KEY_EXTENDED_CONVERSATIONS -> {
+                return true
+            }
+            KEY_THEME -> {
+                AppGlobal.instance.applyNightMode(newValue as String)
+                (requireActivity() as BaseActivity).apply {
+//                    applyNightMode()
+                    finish()
+                    startActivity(intent)
+//                    recreate()
+                }
+
+                return true
+            }
+        }
+
+        return false
+    }
+
+    fun onBackPressed() = if (currentPreferenceLayout == R.xml.fragment_settings) {
+        true
+    } else {
+        currentPreferenceLayout = R.xml.fragment_settings
+        init()
+        false
+    }
+
+    private fun logout() {
+        startActivity(Intent(requireContext(), DropUserDataActivity::class.java))
+    }
+}

app/src/main/java/com/meloda/fast/fragment/LoginFragment.kt

@@ -0,0 +1,157 @@
+package com.meloda.fast.fragment
+
+import android.os.Bundle
+import android.text.Editable
+import android.text.TextWatcher
+import android.view.KeyEvent
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.view.inputmethod.EditorInfo
+import android.widget.EditText
+import com.google.android.material.button.MaterialButton
+import com.meloda.fast.R
+import com.meloda.fast.base.BaseFragment
+import com.meloda.fast.fragment.ui.presenter.LoginPresenter
+import com.meloda.fast.fragment.ui.view.LoginView
+import com.meloda.fast.util.KeyboardUtils
+
+class LoginFragment : BaseFragment(), LoginView {
+
+    private lateinit var presenter: LoginPresenter
+
+    private lateinit var email: EditText
+    private lateinit var password: EditText
+    private lateinit var authorize: MaterialButton
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        presenter = LoginPresenter(this)
+        presenter.onCreate(requireContext(), this, savedInstanceState)
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        presenter.onCreateView(savedInstanceState)
+        return inflater.inflate(R.layout.fragment_login, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        presenter.onViewCreated(savedInstanceState)
+    }
+
+    override fun initViews() {
+        email = requireView().findViewById(R.id.loginEmailEditText)
+        password = requireView().findViewById(R.id.loginPasswordEditText)
+        authorize = requireView().findViewById(R.id.loginAuthorize)
+    }
+
+    override fun prepareViews() {
+        prepareEmailEditText()
+        preparePasswordEditText()
+        prepareAuthorizeButton()
+    }
+
+    private fun prepareEmailEditText() {
+        email.addTextChangedListener(onTextChangedListener)
+    }
+
+    private fun preparePasswordEditText() {
+        password.addTextChangedListener(onTextChangedListener)
+
+        password.setOnEditorActionListener { _, _, event ->
+            if (event == null) return@setOnEditorActionListener false
+            return@setOnEditorActionListener if (event.action == EditorInfo.IME_ACTION_DONE ||
+                (event.action == KeyEvent.ACTION_DOWN && (event.keyCode == KeyEvent.KEYCODE_ENTER || event.keyCode == KeyEvent.KEYCODE_NUMPAD_ENTER))
+            ) {
+                KeyboardUtils.hideKeyboardFrom(password)
+                authorize.performClick()
+                true
+            } else false
+        }
+    }
+
+    private fun prepareAuthorizeButton() {
+        authorize.isEnabled = false
+        authorize.setOnClickListener {
+            val emailString = email.text.toString().trim()
+            val passwordString = password.text.toString().trim()
+
+            presenter.login(emailString, passwordString)
+        }
+    }
+
+    override fun showErrorSnackbar(t: Throwable) {
+        TODO("Not yet implemented")
+    }
+
+    override fun prepareNoItemsView() {
+        TODO("Not yet implemented")
+    }
+
+    override fun showNoItemsView() {
+        TODO("Not yet implemented")
+    }
+
+    override fun hideNoItemsView() {
+        TODO("Not yet implemented")
+    }
+
+    override fun prepareNoInternetView() {
+        TODO("Not yet implemented")
+    }
+
+    override fun showNoInternetView() {
+        TODO("Not yet implemented")
+    }
+
+    override fun hideNoInternetView() {
+        TODO("Not yet implemented")
+    }
+
+    override fun prepareErrorView() {
+        TODO("Not yet implemented")
+    }
+
+    override fun showErrorView() {
+        TODO("Not yet implemented")
+    }
+
+    override fun hideErrorView() {
+        TODO("Not yet implemented")
+    }
+
+    override fun showProgressBar() {
+        TODO("Not yet implemented")
+    }
+
+    override fun hideProgressBar() {
+        TODO("Not yet implemented")
+    }
+
+    override fun showRefreshLayout() {
+        TODO("Not yet implemented")
+    }
+
+    override fun hideRefreshLayout() {
+        TODO("Not yet implemented")
+    }
+
+    private val onTextChangedListener = object : TextWatcher {
+        override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
+        }
+
+        override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
+            authorize.isEnabled =
+                email.text.toString().trim().isNotEmpty() &&
+                        password.text.toString().trim().isNotEmpty()
+        }
+
+        override fun afterTextChanged(s: Editable?) {
+        }
+    }
+}

app/src/main/java/com/meloda/fast/fragment/ValidationFragment.kt

@@ -0,0 +1,88 @@
+package com.meloda.fast.fragment
+
+import android.graphics.Bitmap
+import android.os.Bundle
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.webkit.CookieManager
+import android.webkit.WebView
+import android.webkit.WebViewClient
+import androidx.core.os.bundleOf
+import com.meloda.fast.api.VKAuth
+import com.meloda.fast.base.BaseFragment
+
+
+class ValidationFragment : BaseFragment() {
+
+    private var url: String = ""
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        if (arguments != null && requireArguments().isEmpty.not()) {
+            url = requireArguments().getString("url") ?: ""
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        val webView = WebView(requireContext())
+        webView.webViewClient = object : WebViewClient() {
+            override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
+                parseUrl(url ?: "")
+            }
+        }
+
+        webView.settings.domStorageEnabled = true
+        webView.clearCache(true)
+        webView.layoutParams = ViewGroup.LayoutParams(
+            ViewGroup.LayoutParams.MATCH_PARENT,
+            ViewGroup.LayoutParams.MATCH_PARENT
+        )
+
+        val manager = CookieManager.getInstance()
+        manager.removeAllCookies(null)
+        manager.flush()
+        manager.setAcceptCookie(true)
+
+        return webView
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        (requireView() as WebView).loadUrl(url)
+    }
+
+    private fun parseUrl(url: String) {
+        Log.d("WebView url", url)
+        try {
+            if (url.startsWith("https://oauth.vk.com/blank.html#success=1")) {
+                Log.d("Success WebView", "")
+                if (!url.contains("error=")) {
+                    val auth = VKAuth.parseRedirectUrl(url)
+
+                    val token = auth[0]
+                    val userId = auth[1].toInt()
+
+                    parentFragmentManager.setFragmentResult(
+                        "validation",
+                        bundleOf(
+                            Pair("token", token),
+                            Pair("userId", userId)
+                        )
+                    )
+
+                    parentFragmentManager.popBackStack()
+
+                }
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+    }
+
+}

app/src/main/java/com/meloda/fast/fragment/ui/presenter/ConversationsPresenter.kt

@@ -0,0 +1,255 @@
+package com.meloda.fast.fragment.ui.presenter
+
+import android.os.Bundle
+import android.util.Log
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import com.meloda.fast.BuildConfig
+import com.meloda.fast.activity.MessagesActivity
+import com.meloda.fast.adapter.ConversationsAdapter
+import com.meloda.fast.adapter.diffutil.ConversationsCallback
+import com.meloda.fast.api.model.VKConversation
+import com.meloda.fast.api.util.VKUtil
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.common.TimeManager
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.fragment.ui.repository.ConversationsRepository
+import com.meloda.fast.fragment.ui.view.ConversationsView
+import com.meloda.fast.listener.ItemClickListener
+import com.meloda.fast.listener.ItemLongClickListener
+import com.meloda.fast.util.AndroidUtils
+import com.meloda.fast.util.ArrayUtils
+import com.meloda.mvp.MvpOnLoadListener
+import com.meloda.mvp.MvpPresenter
+import java.util.*
+
+class ConversationsPresenter(viewState: ConversationsView) :
+    MvpPresenter<VKConversation, ConversationsRepository, ConversationsView>(
+        viewState,
+        ConversationsRepository::class.java.name
+    ),
+    ItemClickListener,
+    ItemLongClickListener,
+    TimeManager.OnMinuteChangeListener {
+
+    companion object {
+        const val DEFAULT_CONVERSATIONS_COUNT = 30
+    }
+
+    private var conversationsCount: Int = 0
+
+    private lateinit var adapter: ConversationsAdapter
+
+    private lateinit var recyclerView: RecyclerView
+    private lateinit var layoutManager: LinearLayoutManager
+
+    fun setup(recyclerView: RecyclerView, refreshLayout: SwipeRefreshLayout) {
+        this.recyclerView = recyclerView
+        this.context = recyclerView.context
+        this.layoutManager = recyclerView.layoutManager as LinearLayoutManager
+
+        prepareViews()
+
+//        setRecyclerViewScrollListener(recyclerView)
+        setRefreshLayoutListener(refreshLayout)
+
+        createAdapter()
+
+        TimeManager.addOnMinuteChangeListener(this)
+
+        loadConversations(0, DEFAULT_CONVERSATIONS_COUNT)
+
+//        getCachedConversations(0, DEFAULT_CONVERSATIONS_COUNT, object : MvpOnLoadListener<Any?> {
+//            override fun onResponse(response: Any?) {
+//                setState(if (adapter.isEmpty()) ListState.EMPTY_LOADING else ListState.FILLED_LOADING)
+//                loadConversations(0, DEFAULT_CONVERSATIONS_COUNT)
+//            }
+//
+//            override fun onError(t: Throwable) {
+//                setState(if (adapter.isEmpty()) ListState.EMPTY_LOADING else ListState.FILLED_LOADING)
+//                loadConversations(0, DEFAULT_CONVERSATIONS_COUNT)
+//            }
+//        })
+    }
+
+    private fun setRecyclerViewScrollListener(recyclerView: RecyclerView) {
+        recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
+            }
+
+            override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
+                if (dy > 0) {
+                    if (adapter.isLastItem() && !adapter.isLoading && adapter.itemCount < conversationsCount) {
+                        adapter.isLoading = true
+
+                        val position = adapter.itemCount - 1
+//                            adapter.itemCount - 1 - (layoutManager.findLastCompletelyVisibleItemPosition() - layoutManager.findFirstCompletelyVisibleItemPosition())
+
+                        setState(ListState.FILLED_LOADING)
+                        if (AndroidUtils.hasConnection()) {
+                            loadConversations(adapter.itemCount, DEFAULT_CONVERSATIONS_COUNT,
+                                object : MvpOnLoadListener<Any?> {
+                                    override fun onResponse(response: Any?) {
+                                        recyclerView.scrollToPosition(position)
+
+                                        adapter.isLoading = false
+                                    }
+
+                                    override fun onError(t: Throwable) {
+                                        viewState.showErrorSnackbar(t)
+                                    }
+                                })
+                        } else {
+                            getCachedConversations(adapter.itemCount, DEFAULT_CONVERSATIONS_COUNT,
+                                object : MvpOnLoadListener<Any?> {
+                                    override fun onResponse(response: Any?) {
+                                        recyclerView.scrollToPosition(position)
+
+                                        adapter.isLoading = false
+                                    }
+
+                                    override fun onError(t: Throwable) {
+                                        viewState.showErrorSnackbar(t)
+                                    }
+                                })
+                        }
+
+                        if (BuildConfig.DEBUG)
+                            Log.d("RecyclerView", "Bottom reached")
+                    }
+                }
+            }
+        })
+    }
+
+    private fun setRefreshLayoutListener(refreshLayout: SwipeRefreshLayout) {
+        refreshLayout.setOnRefreshListener { loadConversations() }
+    }
+
+    private fun getCachedConversations(
+        offset: Int = 0,
+        count: Int = DEFAULT_CONVERSATIONS_COUNT,
+        listener: MvpOnLoadListener<Any?>? = null
+    ) {
+        setState(if (adapter.isEmpty()) ListState.EMPTY_LOADING else ListState.FILLED_LOADING)
+
+        repository.getCachedConversations(offset, count,
+            object : MvpOnLoadListener<ArrayList<VKConversation>> {
+                override fun onResponse(response: ArrayList<VKConversation>) {
+                    conversationsCount = response.size
+
+                    val conversations = ArrayUtils.cut(response, offset, count)
+
+                    fillAdapter(conversations, offset)
+
+                    setState(if (adapter.isEmpty()) ListState.EMPTY else ListState.FILLED)
+
+                    listener?.onResponse(null)
+                }
+
+                override fun onError(t: Throwable) {
+                    setState(if (adapter.isEmpty()) ListState.EMPTY_ERROR else ListState.FILLED)
+
+                    listener?.onError(t)
+                }
+            })
+    }
+
+    private fun loadConversations(
+        offset: Int = 0,
+        count: Int = DEFAULT_CONVERSATIONS_COUNT,
+        listener: MvpOnLoadListener<Any?>? = null
+    ) {
+        if (!AndroidUtils.hasConnection()) {
+            setState(if (adapter.isEmpty()) ListState.EMPTY_NO_INTERNET else ListState.FILLED)
+            return
+        } else {
+            setState(if (adapter.isEmpty()) ListState.EMPTY_LOADING else ListState.FILLED_LOADING)
+        }
+
+        repository.loadConversations(offset, count,
+            object : MvpOnLoadListener<ArrayList<VKConversation>> {
+                override fun onResponse(response: ArrayList<VKConversation>) {
+                    conversationsCount = VKConversation.conversationsCount
+
+                    fillAdapter(response, offset)
+
+                    setState(if (adapter.isEmpty()) ListState.EMPTY else ListState.FILLED)
+
+                    listener?.onResponse(null)
+                }
+
+                override fun onError(t: Throwable) {
+                    setState(if (adapter.isEmpty()) ListState.EMPTY_ERROR else ListState.FILLED)
+
+                    listener?.onError(t)
+                }
+            })
+    }
+
+    override fun destroy() {
+        adapter.destroy()
+        TimeManager.removeOnMinuteChangeListener(this)
+    }
+
+    private fun createAdapter() {
+        adapter = ConversationsAdapter(recyclerView, arrayListOf()).also {
+            it.itemClickListener = this
+            it.itemLongClickListener = this
+        }
+
+        recyclerView.adapter = adapter
+    }
+
+    private fun fillAdapter(conversations: ArrayList<VKConversation>, offset: Int) {
+        val oldItems = ArrayList(adapter.values)
+
+        if (offset > 0) {
+            adapter.addAll(conversations)
+        } else {
+            adapter.updateValues(conversations)
+        }
+
+        adapter.notifyChanges(oldItems)
+
+        if (offset == 0) recyclerView.scrollToPosition(0)
+    }
+
+    override fun onItemClick(position: Int) {
+        openChat(adapter[position])
+    }
+
+    override fun onItemLongClick(position: Int) {
+
+    }
+
+    override fun onMinuteChange(currentMinute: Int) {
+        post { adapter.notifyItemRangeChanged(0, adapter.itemCount, ConversationsCallback.DATE) }
+    }
+
+    private fun openChat(conversation: VKConversation) {
+        TaskManager.execute {
+            val peerUser = MemoryCache.getUserById(conversation.conversationId)
+            val peerGroup = MemoryCache.getGroupById(conversation.conversationId)
+
+            val extras = Bundle().also {
+                it.putInt(MessagesActivity.TAG_EXTRA_ID, conversation.conversationId)
+                it.putString(
+                    MessagesActivity.TAG_EXTRA_TITLE,
+                    VKUtil.getTitle(conversation, peerUser, peerGroup)
+                )
+                it.putString(
+                    MessagesActivity.TAG_EXTRA_AVATAR,
+                    VKUtil.getAvatar(conversation, peerUser, peerGroup)
+                )
+                it.putSerializable(MessagesActivity.TAG_EXTRA_USER, peerUser)
+                it.putSerializable(MessagesActivity.TAG_EXTRA_GROUP, peerGroup)
+            }
+
+            post { viewState.openChat(extras) }
+        }
+
+    }
+
+}

app/src/main/java/com/meloda/fast/fragment/ui/presenter/FriendsPresenter.kt

@@ -0,0 +1,232 @@
+package com.meloda.fast.fragment.ui.presenter
+
+import android.os.Bundle
+import android.util.Log
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import com.meloda.fast.activity.MessagesActivity
+import com.meloda.fast.adapter.UsersAdapter
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.fragment.ui.repository.FriendsRepository
+import com.meloda.fast.fragment.ui.view.FriendsView
+import com.meloda.fast.listener.ItemClickListener
+import com.meloda.fast.util.AndroidUtils
+import com.meloda.fast.util.ArrayUtils
+import com.meloda.mvp.MvpOnLoadListener
+import com.meloda.mvp.MvpPresenter
+
+class FriendsPresenter(viewState: FriendsView) :
+    MvpPresenter<VKUser, FriendsRepository, FriendsView>(
+        viewState,
+        FriendsRepository::class.java.name
+    ),
+    ItemClickListener {
+
+    companion object {
+        const val ONLY_ONLINE = "_only_online"
+
+        const val DEFAULT_FRIENDS_COUNT = 30
+    }
+
+    private var userId: Int = 0
+    private var friendsCount: Int = 0
+
+    private lateinit var adapter: UsersAdapter
+
+    private lateinit var recyclerView: RecyclerView
+    private lateinit var layoutManager: LinearLayoutManager
+
+    fun setup(userId: Int, recyclerView: RecyclerView, refreshLayout: SwipeRefreshLayout) {
+        this.userId = userId
+        this.recyclerView = recyclerView
+        this.context = recyclerView.context
+        this.layoutManager = recyclerView.layoutManager as LinearLayoutManager
+
+        setRecyclerViewScrollListener(recyclerView)
+        setRefreshListener(refreshLayout)
+
+        createAdapter()
+
+        getCachedFriends(userId, 0, DEFAULT_FRIENDS_COUNT, false, object : MvpOnLoadListener<Any?> {
+            override fun onResponse(response: Any?) {
+                setState(if (adapter.isEmpty()) MvpPresenter.ListState.EMPTY_LOADING else ListState.FILLED_LOADING)
+                loadFriends(userId, 0, ConversationsPresenter.DEFAULT_CONVERSATIONS_COUNT)
+            }
+
+            override fun onError(t: Throwable) {
+                setState(if (adapter.isEmpty()) ListState.EMPTY_LOADING else ListState.FILLED_LOADING)
+                loadFriends(userId, 0, ConversationsPresenter.DEFAULT_CONVERSATIONS_COUNT)
+            }
+        })
+    }
+
+    private fun getCachedFriends(
+        userId: Int,
+        offset: Int = 0,
+        count: Int = DEFAULT_FRIENDS_COUNT,
+        onlyOnline: Boolean = false,
+        listener: MvpOnLoadListener<Any?>? = null
+    ) {
+        setState(if (adapter.isEmpty()) ListState.EMPTY_LOADING else ListState.FILLED_LOADING)
+
+        repository.getCachedFriends(
+            userId,
+            offset,
+            count,
+            onlyOnline,
+            object : MvpOnLoadListener<ArrayList<VKUser>> {
+                override fun onResponse(response: ArrayList<VKUser>) {
+                    val friends = ArrayUtils.cut(response, offset, count)
+
+                    fillAdapter(friends, offset)
+
+                    setState(if (adapter.isEmpty()) ListState.EMPTY else ListState.FILLED)
+
+                    listener?.onResponse(null)
+                }
+
+                override fun onError(t: Throwable) {
+                    setState(if (adapter.isEmpty()) ListState.EMPTY_ERROR else ListState.FILLED)
+
+                    listener?.onError(t)
+                }
+            })
+    }
+
+    private fun loadFriends(
+        userId: Int,
+        offset: Int = 0,
+        count: Int = DEFAULT_FRIENDS_COUNT,
+        onlyOnline: Boolean = false,
+        listener: MvpOnLoadListener<Any?>? = null
+    ) {
+        if (!AndroidUtils.hasConnection()) {
+            setState(if (adapter.isEmpty()) ListState.EMPTY_NO_INTERNET else ListState.FILLED)
+            return
+        } else {
+            setState(if (adapter.isEmpty()) ListState.EMPTY_LOADING else ListState.FILLED_LOADING)
+        }
+
+        repository.loadFriends(
+            userId,
+            offset,
+            count,
+            object : MvpOnLoadListener<ArrayList<VKUser>> {
+                override fun onResponse(response: ArrayList<VKUser>) {
+                    friendsCount = VKUser.friendsCount
+
+                    fillAdapter(response, offset)
+
+                    setState(if (adapter.isEmpty()) ListState.EMPTY else ListState.FILLED)
+
+                    listener?.onResponse(null)
+                }
+
+                override fun onError(t: Throwable) {
+                    setState(if (adapter.isEmpty()) ListState.EMPTY_ERROR else ListState.FILLED)
+
+                    listener?.onError(t)
+                }
+            })
+    }
+
+    private fun setRecyclerViewScrollListener(recyclerView: RecyclerView) {
+        recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
+            }
+
+            override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
+                if (dy > 0) {
+                    if (adapter.isLastItem() && !adapter.isLoading && adapter.itemCount < friendsCount) {
+                        adapter.isLoading = true
+
+                        val position = adapter.itemCount - 1
+//                            adapter.itemCount - 1 - (layoutManager.findLastCompletelyVisibleItemPosition() - layoutManager.findFirstCompletelyVisibleItemPosition())
+
+                        setState(ListState.FILLED_LOADING)
+                        if (AndroidUtils.hasConnection()) {
+                            loadFriends(
+                                userId,
+                                adapter.itemCount,
+                                DEFAULT_FRIENDS_COUNT,
+                                false,
+                                object : MvpOnLoadListener<Any?> {
+                                    override fun onResponse(response: Any?) {
+                                        recyclerView.scrollToPosition(position)
+
+                                        adapter.isLoading = false
+                                    }
+
+                                    override fun onError(t: Throwable) {
+                                        viewState.showErrorSnackbar(t)
+                                    }
+                                })
+                        } else {
+                            getCachedFriends(
+                                userId,
+                                adapter.itemCount,
+                                DEFAULT_FRIENDS_COUNT,
+                                false,
+                                object : MvpOnLoadListener<Any?> {
+                                    override fun onResponse(response: Any?) {
+                                        recyclerView.scrollToPosition(position)
+
+                                        adapter.isLoading = false
+                                    }
+
+                                    override fun onError(t: Throwable) {
+                                        viewState.showErrorSnackbar(t)
+                                    }
+                                })
+                        }
+
+                        Log.d("RecyclerView", "Bottom reached")
+                    }
+                }
+            }
+        })
+    }
+
+    private fun setRefreshListener(refreshLayout: SwipeRefreshLayout) {
+        refreshLayout.setOnRefreshListener { loadFriends(userId) }
+    }
+
+    private fun createAdapter() {
+        adapter = UsersAdapter(context!!, arrayListOf()).also {
+            it.itemClickListener = this
+        }
+
+        recyclerView.adapter = adapter
+    }
+
+    private fun fillAdapter(values: ArrayList<VKUser>, offset: Int) {
+        val oldItems = ArrayList(adapter.values)
+
+        if (offset > 0) {
+            adapter.addAll(values)
+        } else {
+            adapter.updateValues(values)
+        }
+
+//        adapter.notifyDataSetChanged()
+        adapter.notifyChanges(oldItems)
+
+        if (offset == 0) recyclerView.scrollToPosition(0)
+    }
+
+    private fun openChat(position: Int) {
+        val user = adapter[position]
+
+        val data = Bundle().apply {
+            putInt(MessagesActivity.TAG_EXTRA_ID, user.userId)
+            putString(MessagesActivity.TAG_EXTRA_TITLE, user.toString())
+            putString(MessagesActivity.TAG_EXTRA_AVATAR, user.photo200)
+        }
+    }
+
+    override fun onItemClick(position: Int) {
+
+    }
+
+}

app/src/main/java/com/meloda/fast/fragment/ui/presenter/LoginPresenter.kt

@@ -0,0 +1,186 @@
+package com.meloda.fast.fragment.ui.presenter
+
+import android.content.Context
+import android.os.Bundle
+import android.view.Gravity
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.LinearLayout
+import androidx.appcompat.app.AlertDialog
+import androidx.core.view.isVisible
+import androidx.fragment.app.setFragmentResultListener
+import com.google.android.material.textfield.TextInputEditText
+import com.meloda.fast.R
+import com.meloda.fast.activity.MainActivity
+import com.meloda.fast.api.UserConfig
+import com.meloda.fast.extensions.FragmentExtensions.runOnUiThread
+import com.meloda.fast.fragment.FragmentConversations
+import com.meloda.fast.fragment.LoginFragment
+import com.meloda.fast.fragment.ValidationFragment
+import com.meloda.fast.fragment.ui.repository.LoginRepository
+import com.meloda.fast.fragment.ui.view.LoginView
+import com.meloda.mvp.MvpOnLoadListener
+import com.meloda.mvp.MvpPresenter
+import com.squareup.picasso.Picasso
+import org.json.JSONObject
+
+
+class LoginPresenter(
+    viewState: LoginView
+) : MvpPresenter<Any, LoginRepository, LoginView>(
+    viewState,
+    LoginRepository::class.java.name
+) {
+
+    private var lastEmail: String = ""
+    private var lastPassword: String = ""
+
+    private lateinit var fragment: LoginFragment
+
+    fun onCreate(context: Context, fragment: LoginFragment, bundle: Bundle?) {
+        super.onCreate(context, bundle)
+        this.fragment = fragment
+    }
+
+    override fun onViewCreated(bundle: Bundle?) {
+        viewState.initViews()
+        viewState.prepareViews()
+    }
+
+    fun login(
+        email: String,
+        password: String,
+        captcha: String = "",
+        onLoadListener: MvpOnLoadListener<Any?>? = null
+    ) {
+        lastEmail = email
+        lastPassword = password
+
+        repository.login(requireContext(), email, password, captcha,
+            object : MvpOnLoadListener<JSONObject> {
+                override fun onResponse(response: JSONObject) {
+                    checkResponse(response, onLoadListener)
+                }
+
+                override fun onError(t: Throwable) {
+                    onLoadListener?.onError(t)
+                }
+            })
+    }
+
+    @Suppress("MoveVariableDeclarationIntoWhen")
+    private fun checkResponse(
+        response: JSONObject,
+        onLoadListener: MvpOnLoadListener<Any?>? = null
+    ) {
+        if (response.has("error")) {
+            val errorString = response.optString("error")
+            when (errorString) {
+                "need_validation" -> {
+                    val redirectUrl = response.optString("redirect_uri")
+
+                    val bundle = Bundle()
+                    bundle.putString("url", redirectUrl)
+
+                    fragment.runOnUiThread {
+                        fragment.setFragmentResultListener("validation") { _, bundle ->
+                            val userId = bundle.getInt("userId")
+                            val token = bundle.getString("token") ?: ""
+                            saveUserData(userId, token)
+
+                            openMainScreen()
+                        }
+                    }
+
+                    fragment.parentFragmentManager.beginTransaction()
+                        .replace(
+                            R.id.fragmentContainer,
+                            ValidationFragment().apply { arguments = bundle })
+                        .addToBackStack("")
+                        .commit()
+
+                }
+                "need_captcha" -> {
+                    val captchaImage = response.optString("captcha_img")
+                    val captchaSid = response.optString("captcha_sid")
+                    showCaptchaDialog(captchaImage, captchaSid)
+                }
+            }
+        } else {
+            val userId = response.optInt("user_id", -1)
+            val token = response.optString("access_token")
+            saveUserData(userId, token)
+
+            openMainScreen()
+
+            onLoadListener?.onResponse(null)
+        }
+    }
+
+    private fun openMainScreen() {
+        fragment.runOnUiThread {
+            (fragment.requireActivity() as MainActivity).bottomBar.isVisible = true
+
+            fragment.parentFragmentManager.beginTransaction()
+                .replace(
+                    R.id.fragmentContainer,
+                    FragmentConversations()
+                ).commit()
+        }
+    }
+
+    private fun saveUserData(userId: Int, token: String) {
+        UserConfig.userId = userId
+        UserConfig.token = token
+        UserConfig.save()
+    }
+
+    private fun showCaptchaDialog(captchaImage: String, captchaSid: String) {
+        val resources = fragment.resources
+        val metrics = resources.displayMetrics
+
+        fragment.runOnUiThread {
+            val image = ImageView(requireContext())
+            image.layoutParams = ViewGroup.LayoutParams(
+                (metrics.widthPixels / 3.5).toInt(), metrics.heightPixels / 7
+            )
+
+            Picasso.get().load(captchaImage).priority(Picasso.Priority.HIGH).into(image)
+
+            val captchaCodeEditText = TextInputEditText(requireContext())
+            captchaCodeEditText.setHint(R.string.captcha_hint)
+
+            captchaCodeEditText.layoutParams =
+                LinearLayout.LayoutParams(
+                    ViewGroup.LayoutParams.MATCH_PARENT,
+                    ViewGroup.LayoutParams.WRAP_CONTENT
+                )
+
+            val builder = AlertDialog.Builder(requireContext())
+
+            val layout = LinearLayout(requireContext())
+
+            layout.orientation = LinearLayout.VERTICAL
+            layout.gravity = Gravity.CENTER
+            layout.addView(image)
+            layout.addView(captchaCodeEditText)
+
+            builder.setView(layout)
+            builder.setNegativeButton(android.R.string.cancel, null)
+            builder.setPositiveButton(android.R.string.ok) { _, _ ->
+                val captchaCode = captchaCodeEditText.text.toString().trim()
+
+                login(
+                    lastEmail,
+                    lastPassword,
+                    "&captcha_sid=$captchaSid&captcha_key=$captchaCode"
+                )
+            }
+
+            builder.setTitle(R.string.input_captcha)
+            builder.show()
+        }
+    }
+
+
+}

app/src/main/java/com/meloda/fast/fragment/ui/repository/ConversationsRepository.kt

@@ -0,0 +1,106 @@
+package com.meloda.fast.fragment.ui.repository
+
+import com.meloda.fast.api.VKApi
+import com.meloda.fast.api.model.VKConversation
+import com.meloda.fast.api.model.VKMessage
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.api.util.VKUtil
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.extensions.ArrayExtensions.asArrayList
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.mvp.MvpOnLoadListener
+import com.meloda.mvp.MvpRepository
+
+class ConversationsRepository : MvpRepository<VKConversation>() {
+
+    fun loadConversations(
+        offset: Int, count: Int,
+        listener: MvpOnLoadListener<ArrayList<VKConversation>>
+    ) {
+        TaskManager.execute {
+            VKApi.messages()
+                .getConversations()
+                .filter("all")
+                .extended(true)
+                .fields(VKUser.DEFAULT_FIELDS)
+                .offset(offset)
+                .count(count)
+                .executeArray(VKConversation::class.java,
+                    object : OnResponseListener<ArrayList<VKConversation>> {
+                        override fun onResponse(response: ArrayList<VKConversation>) {
+                            TaskManager.execute {
+                                cacheLoadedConversations(response)
+
+                                MemoryCache.putUsers(VKConversation.profiles)
+                                MemoryCache.putGroups(VKConversation.groups)
+
+                                sendResponse(listener, response)
+                            }
+                        }
+
+                        override fun onError(t: Throwable) {
+                            sendError(listener, t)
+                        }
+                    })
+        }
+    }
+
+    fun getCachedConversations(
+        offset: Int, count: Int,
+        listener: MvpOnLoadListener<ArrayList<VKConversation>>
+    ) {
+        if (true) {
+            sendResponse(listener, arrayListOf())
+            return
+        }
+        TaskManager.execute {
+            val conversations = MemoryCache.getConversations().asArrayList()
+
+            VKUtil.sortConversationsByDate(conversations, true)
+
+            sendResponse(listener, conversations)
+        }
+    }
+
+    private fun fillConversationsWithProfilesAndGroups(conversations: ArrayList<VKConversation>) {
+        for (conversation in conversations) {
+            val lastMessage = conversation.lastMessage
+
+            when (conversation.type) {
+                VKConversation.TYPE_USER -> {
+                    VKUtil.searchUser(conversation.conversationId)?.let {
+                        conversation.peerUser = it
+                    }
+                }
+
+                VKConversation.TYPE_GROUP -> {
+                    VKUtil.searchGroup(conversation.conversationId)?.let {
+                        conversation.peerGroup = it
+                    }
+                }
+            }
+
+            if (lastMessage.isFromGroup()) {
+                VKUtil.searchGroup(lastMessage.fromId)?.let {
+                    lastMessage.fromGroup = it
+                }
+            } else {
+                VKUtil.searchUser(lastMessage.fromId)?.let {
+                    lastMessage.fromUser = it
+                }
+            }
+        }
+    }
+
+    private fun cacheLoadedConversations(conversations: List<VKConversation>) {
+        val messages = arrayListOf<VKMessage>()
+
+        for (conversation in conversations) {
+            messages.add(conversation.lastMessage)
+        }
+
+        MemoryCache.putMessages(messages)
+        MemoryCache.putConversations(conversations)
+    }
+}

app/src/main/java/com/meloda/fast/fragment/ui/repository/FriendsRepository.kt

@@ -0,0 +1,89 @@
+package com.meloda.fast.fragment.ui.repository
+
+import android.util.Log
+import com.meloda.fast.api.VKApi
+import com.meloda.fast.api.model.VKFriend
+import com.meloda.fast.api.model.VKUser
+import com.meloda.fast.common.TaskManager
+import com.meloda.fast.database.MemoryCache
+import com.meloda.fast.listener.OnResponseListener
+import com.meloda.mvp.MvpOnLoadListener
+import com.meloda.mvp.MvpRepository
+
+class FriendsRepository : MvpRepository<VKUser>() {
+
+    fun loadFriends(
+        userId: Int,
+        offset: Int,
+        count: Int,
+        listener: MvpOnLoadListener<ArrayList<VKUser>>
+    ) {
+        TaskManager.execute {
+            VKApi.friends()
+                .get()
+                .order("hints")
+                .userId(userId)
+                .fields(VKUser.DEFAULT_FIELDS)
+                .count(count)
+                .offset(offset)
+                .executeArray(VKUser::class.java,
+                    object : OnResponseListener<ArrayList<VKUser>> {
+                        override fun onResponse(response: ArrayList<VKUser>) {
+                            Log.d("FriendsRepository", "get ${response.size} friends from api")
+
+                            TaskManager.execute {
+                                cacheLoadedUsers(userId, response)
+                            }
+
+                            sendResponse(listener, response)
+                        }
+
+                        override fun onError(t: Throwable) {
+                            sendError(listener, t)
+                        }
+                    })
+        }
+    }
+
+    fun getCachedFriends(
+        userId: Int, offset: Int, count: Int, onlyOnline: Boolean,
+        listener: MvpOnLoadListener<ArrayList<VKUser>>
+    ) {
+        TaskManager.execute {
+            val friendsArray = MemoryCache.getFriends(userId)
+
+            Log.d("FriendsRepository", "get ${friendsArray.size} friends from cache")
+
+            if (friendsArray.isEmpty()) {
+                sendError(listener, NullPointerException("Friends list is empty"))
+                return@execute
+            }
+
+            val friends = arrayListOf<VKUser>()
+
+            for (friend in friendsArray) {
+                val user = MemoryCache.getUserById(friend.friendId)
+
+                user?.let {
+                    if (onlyOnline && user.isOnline || !onlyOnline) {
+                        friends.add(user)
+                    }
+                }
+            }
+
+            sendResponse(listener, friends)
+        }
+    }
+
+    private fun cacheLoadedUsers(userId: Int, users: ArrayList<VKUser>) {
+        MemoryCache.putUsers(users)
+
+        val friends = ArrayList<VKFriend>()
+
+        for (user in users) {
+            friends.add(VKFriend(user.userId, userId))
+        }
+
+        MemoryCache.putFriends(friends)
+    }
+}

app/src/main/java/com/meloda/fast/fragment/ui/repository/LoginRepository.kt

@@ -0,0 +1,74 @@
+package com.meloda.fast.fragment.ui.repository
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.webkit.CookieManager
+import android.webkit.JavascriptInterface
+import android.webkit.WebView
+import android.webkit.WebViewClient
+import com.meloda.fast.api.VKAuth
+import com.meloda.mvp.MvpOnLoadListener
+import com.meloda.mvp.MvpRepository
+import org.json.JSONObject
+import org.jsoup.Jsoup
+
+class LoginRepository : MvpRepository<Any>() {
+
+    fun login(
+        context: Context,
+        email: String,
+        password: String,
+        captcha: String,
+        onLoadListener: MvpOnLoadListener<JSONObject>
+    ) {
+        if (email.trim().isEmpty() || password.trim().isEmpty()) return
+        val loadingUrl = VKAuth.getDirectAuthUrl(email, password, captcha)
+
+        val webView = createWebView(context)
+
+        webView.addJavascriptInterface(WebViewHandlerInterface(onLoadListener), "HtmlHandler")
+        webView.webViewClient = object : WebViewClient() {
+            override fun onPageFinished(view: WebView?, url: String?) {
+                webView.loadUrl(
+                    "javascript:window.HtmlHandler.handleHtml" +
+                            "('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');"
+                )
+            }
+        }
+
+        webView.loadUrl(loadingUrl)
+    }
+
+    @SuppressLint("SetJavaScriptEnabled")
+    private fun createWebView(context: Context): WebView {
+        val loginWebView = WebView(context)
+
+        loginWebView.settings.javaScriptEnabled = true
+        loginWebView.settings.domStorageEnabled = true
+        loginWebView.settings.loadsImagesAutomatically = false
+        loginWebView.settings.userAgentString = "Chrome/41.0.2228.0 Safari/537.36"
+
+        loginWebView.clearCache(true)
+
+        val cookieManager = CookieManager.getInstance()
+        cookieManager.removeAllCookies(null)
+        cookieManager.flush()
+        cookieManager.setAcceptCookie(false)
+
+        return loginWebView
+    }
+
+    private class WebViewHandlerInterface(private var onLoadListener: MvpOnLoadListener<JSONObject>) {
+        @JavascriptInterface
+        fun handleHtml(html: String?) {
+            val doc = Jsoup.parse(html)
+
+            val responseString =
+                doc.select("pre[style=\"word-wrap: break-word; white-space: pre-wrap;\"]")
+                    .first()
+                    .text()
+
+            onLoadListener.onResponse(JSONObject(responseString))
+        }
+    }
+}

app/src/main/java/com/meloda/fast/fragment/ui/view/ConversationsView.kt

@@ -0,0 +1,10 @@
+package com.meloda.fast.fragment.ui.view
+
+import android.os.Bundle
+import com.meloda.mvp.MvpView
+
+interface ConversationsView : MvpView {
+
+    fun openChat(extras: Bundle)
+
+}