Refactor: Enhance conversations and friends features

-   In `ConversationsScreen`, removed `isNeedToScrollToTop` and `onScrolledToTop`, and refactored toolbar container color logic. Added `NoItemsView` for empty conversation lists.
-   In `MainGraph`, added `onMessageClicked` for navigation to message history.
-   In `ApiEvent`, introduced `parseOrNull` for handling unknown event types.
-   In `ConversationsViewModel`, removed `scrollToTop` logic and refactored error handling.
-   In `FriendsViewModel`, refactored error handling and introduced `onErrorConsumed` and `handleError`.
-   In `FriendItem`, added an icon button to initiate sending a message to a friend.
-   In `strings.xml`, added or updated strings for session expiration, log out, refreshing, and empty friend lists.
-   In `RootScreen`, added `onMessageClicked` for navigating to messages.
-   In `FriendsList`, added `onMessageClicked` for handling message clicks.
-   In `MainScreen`, removed unused `MutableSharedFlow`.
-   In `FriendsScreen`, added support for showing errors, added `onMessageClicked`, and replaced `hazeChild` with `hazeEffect` and `hazeSource`.
-   In `FriendsNavigation`, added `onMessageClicked` for handling message clicks.
-   In `ConversationsNavigation`, removed the unused `scrollToTopFlow` parameter.
-   In `ErrorView`, added text alignment.
-   In `NoItemsView`, added support for a button and custom text.
-   In `LongPollUpdatesParser`, replaced try-catch with `parseOrNull`.

app/src/main/kotlin/dev/meloda/fast/navigation/MainGraph.kt

@@ -24,6 +24,7 @@ fun NavGraphBuilder.mainScreen(
     onSettingsButtonClicked: () -> Unit,
     onConversationClicked: (conversationId: Int) -> Unit,
     onPhotoClicked: (url: String) -> Unit,
+    onMessageClicked: (userId: Int) -> Unit,
     viewModel: MainViewModel
 ) {
     val navigationItems = ImmutableList.of(
@@ -54,6 +55,7 @@ fun NavGraphBuilder.mainScreen(
             onSettingsButtonClicked = onSettingsButtonClicked,
             onConversationItemClicked = onConversationClicked,
             onPhotoClicked = onPhotoClicked,
+            onMessageClicked = onMessageClicked,
             viewModel = viewModel
         )
     }

app/src/main/kotlin/dev/meloda/fast/presentation/MainScreen.kt

@@ -47,8 +47,6 @@ import dev.meloda.fast.ui.theme.LocalBottomPadding
 import dev.meloda.fast.ui.theme.LocalHazeState
 import dev.meloda.fast.ui.theme.LocalThemeConfig
 import dev.meloda.fast.ui.util.ImmutableList
-import kotlinx.coroutines.channels.BufferOverflow
-import kotlinx.coroutines.flow.MutableSharedFlow
 
 @OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
@@ -58,6 +56,7 @@ fun MainScreen(
     onSettingsButtonClicked: () -> Unit = {},
     onConversationItemClicked: (conversationId: Int) -> Unit = {},
     onPhotoClicked: (url: String) -> Unit = {},
+    onMessageClicked: (userId: Int) -> Unit = {},
     viewModel: MainViewModel
 ) {
     val currentTheme = LocalThemeConfig.current
@@ -70,14 +69,6 @@ fun MainScreen(
         mutableIntStateOf(1)
     }
 
-    val sharedFlow = remember {
-        MutableSharedFlow<Int>(
-            replay = 0,
-            extraBufferCapacity = 1,
-            onBufferOverflow = BufferOverflow.DROP_OLDEST
-        )
-    }
-
     Scaffold(
         bottomBar = {
             NavigationBar(
@@ -108,8 +99,6 @@ fun MainScreen(
                                         inclusive = true
                                     }
                                 }
-                            } else {
-                                sharedFlow.tryEmit(index)
                             }
                         },
                         icon = {
@@ -176,13 +165,13 @@ fun MainScreen(
                         friendsScreen(
                             onError = onError,
                             navController = navController,
-                            onPhotoClicked = onPhotoClicked
+                            onPhotoClicked = onPhotoClicked,
+                            onMessageClicked = onMessageClicked
                         )
                         conversationsScreen(
                             onError = onError,
                             onConversationItemClicked = onConversationItemClicked,
                             onPhotoClicked = onPhotoClicked,
-                            scrollToTopFlow = sharedFlow,
                             navController = navController,
                         )
                         profileScreen(

app/src/main/kotlin/dev/meloda/fast/presentation/RootScreen.kt

@@ -124,6 +124,7 @@ fun RootScreen(
                 onSettingsButtonClicked = navController::navigateToSettings,
                 onConversationClicked = navController::navigateToMessagesHistory,
                 onPhotoClicked = { url -> navController.navigateToPhotoView(listOf(url)) },
+                onMessageClicked = navController::navigateToMessagesHistory,
                 viewModel = viewModel
             )
 

core/domain/src/main/kotlin/dev/meloda/fast/domain/LongPollUpdatesParser.kt

@@ -41,15 +41,9 @@ class LongPollUpdatesParser(
     fun parseNextUpdate(event: List<Any>) {
         val eventId = event.first().asInt()
 
-        val eventType: ApiEvent = try {
+        when (val eventType =  ApiEvent.parseOrNull(eventId)) {
-            ApiEvent.parse(eventId)
+            null -> Log.d("LongPollUpdatesParser", "parseNextUpdate: unknownEvent: $event")
-        } catch (e: Exception) {
-            e.printStackTrace()
-            Log.d("LongPollUpdatesParser", "parseNextUpdate: unknownEvent: $event")
-            return
-        }
 
-        when (eventType) {
             ApiEvent.MESSAGE_SET_FLAGS -> parseMessageSetFlags(eventType, event)
             ApiEvent.MESSAGE_CLEAR_FLAGS -> parseMessageClearFlags(eventType, event)
             ApiEvent.MESSAGE_NEW -> parseMessageNew(eventType, event)

core/model/src/main/kotlin/dev/meloda/fast/model/ApiEvent.kt

@@ -18,5 +18,6 @@ enum class ApiEvent(val value: Int) {
 
     companion object {
         fun parse(value: Int) = entries.first { it.value == value }
+        fun parseOrNull(value: Int) = entries.firstOrNull { it.value == value }
     }
 }

core/ui/src/main/kotlin/dev/meloda/fast/ui/components/ErrorView.kt

@@ -12,6 +12,7 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 
@@ -31,7 +32,8 @@ fun ErrorView(
     ) {
         Text(
             text = text,
-            style = MaterialTheme.typography.titleLarge
+            style = MaterialTheme.typography.titleLarge,
+            textAlign = TextAlign.Center
         )
 
         buttonText?.let {

core/ui/src/main/kotlin/dev/meloda/fast/ui/components/NoItemsView.kt

@@ -1,29 +1,51 @@
 package dev.meloda.fast.ui.components
 
-import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Button
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
 import dev.meloda.fast.ui.R
 
 @Composable
 fun NoItemsView(
     modifier: Modifier = Modifier,
-    customText: String? = null
+    customText: String? = null,
+    buttonText: String? = null,
+    onButtonClick: (() -> Unit)? = null,
 ) {
-    Box(
+    Column(
-        modifier = modifier.fillMaxSize(),
+        modifier = modifier
-        contentAlignment = Alignment.Center
+            .fillMaxSize()
+            .padding(horizontal = 16.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
     ) {
         Text(
-            text = customText ?: stringResource(id = R.string.no_items),
+            text = customText ?: stringResource(R.string.no_items),
-            style = MaterialTheme.typography.titleLarge
+            style = MaterialTheme.typography.titleLarge,
+            textAlign = TextAlign.Center
         )
+
+        buttonText?.let {
+            Spacer(modifier = Modifier.height(12.dp))
+            Button(
+                onClick = { onButtonClick?.invoke() }
+            ) {
+                Text(text = buttonText)
+            }
+        }
     }
 }
 
@@ -31,6 +53,7 @@ fun NoItemsView(
 @Composable
 private fun NoItemsViewPreview() {
     NoItemsView(
-        customText = "Nothing here..."
+        customText = "Nothing here...",
+        buttonText = "Refresh"
     )
 }

core/ui/src/main/res/values-ru/strings.xml

@@ -128,7 +128,7 @@
     <string name="post_type_community">Запись сообщества</string>
     <string name="post_type_user">Запись пользователя</string>
     <string name="post_type_unknown">Запись на стене</string>
-    <string name="log_out">Выйти</string>
+    <string name="action_log_out">Выйти</string>
     <string name="confirm">Подтверждение</string>
     <string name="message_attachment_story_your_story">Ваша история</string>
     <string name="settings_dynamic_colors">Динамические цвета</string>
@@ -212,4 +212,7 @@
     <string name="captcha_exit_warning">Вы уверены? Процесс ввода капчи будет отменён</string>
     <string name="validation_exit_warning">Вы уверены? Процесс ввода кода-подтверждения будет отменён</string>
     <string name="action_authorize">Авторизоваться</string>
+    <string name="no_online_friends">Никого в сети</string>
+    <string name="try_again">Попробовать ещё раз</string>
+    <string name="session_expired">Срок действия сессии истёк</string>
 </resources>

core/ui/src/main/res/values/strings.xml

@@ -119,7 +119,7 @@
     <string name="post_type_community">Community post</string>
     <string name="post_type_user">User post</string>
     <string name="post_type_unknown">Post</string>
-    <string name="log_out">Log out</string>
+    <string name="action_log_out">Log out</string>
     <string name="confirm">Confirmation</string>
     <string name="sign_out_confirm">Signing out will delete all data related to this account from this device. Continue?</string>
     <string name="yes">Yes</string>
@@ -276,6 +276,8 @@
     <string name="warning_confirmation">Confirmation</string>
     <string name="captcha_exit_warning">Are you sure? Captcha process will be cancelled</string>
     <string name="validation_exit_warning">Are you sure? Validation process will be cancelled</string>
-    <string name="settings_general_enable_pull_to_refresh_title">Enable pull to refresh</string>
     <string name="action_authorize">Authorize</string>
+    <string name="no_online_friends">No one is online</string>
+    <string name="try_again">Try again</string>
+    <string name="session_expired">Session expired</string>
 </resources>

feature/conversations/src/main/kotlin/dev/meloda/fast/conversations/ConversationsViewModel.kt

@@ -30,9 +30,7 @@ import dev.meloda.fast.model.LongPollEvent
 import dev.meloda.fast.model.api.domain.VkConversation
 import dev.meloda.fast.network.VkErrorCode
 import dev.meloda.fast.ui.util.ImmutableList
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
-import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
@@ -40,7 +38,6 @@ import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.flow.update
-import kotlinx.coroutines.launch
 import kotlin.coroutines.cancellation.CancellationException
 
 interface ConversationsViewModel {
@@ -49,7 +46,6 @@ interface ConversationsViewModel {
     val baseError: StateFlow<BaseError?>
     val currentOffset: StateFlow<Int>
     val canPaginate: StateFlow<Boolean>
-    val scrollToTop: StateFlow<Boolean>
 
     fun onPaginationConditionsMet()
 
@@ -70,10 +66,6 @@ interface ConversationsViewModel {
 
     fun setScrollIndex(index: Int)
     fun setScrollOffset(offset: Int)
-
-
-    fun setScrollToTopFlow(scrollToTopFlow: Flow<Int>)
-    fun onScrolledToTop()
 }
 
 class ConversationsViewModelImpl(
@@ -91,7 +83,6 @@ class ConversationsViewModelImpl(
     override val baseError = MutableStateFlow<BaseError?>(null)
     override val currentOffset = MutableStateFlow(0)
     override val canPaginate = MutableStateFlow(false)
-    override val scrollToTop = MutableStateFlow(false)
 
     // TODO: 22-Dec-24, Danil Nikolaev: rewrite
     private val useContactNames = {
@@ -134,7 +125,7 @@ class ConversationsViewModelImpl(
     }
 
     override fun onRefresh() {
-        baseError.setValue { null }
+        onErrorConsumed()
         loadConversations(offset = 0)
     }
 
@@ -237,20 +228,6 @@ class ConversationsViewModelImpl(
         screenState.setValue { old -> old.copy(scrollOffset = offset) }
     }
 
-    override fun setScrollToTopFlow(scrollToTopFlow: Flow<Int>) {
-        scrollToTopFlow.listenValue(viewModelScope) { index ->
-            if (index == 1) {
-                scrollToTop.emit(true)
-            }
-        }
-    }
-
-    override fun onScrolledToTop() {
-        viewModelScope.launch(Dispatchers.Main) {
-            scrollToTop.emit(false)
-        }
-    }
-
     private fun hideOptions(conversationId: Int) {
         screenState.setValue { old ->
             old.copy(

feature/conversations/src/main/kotlin/dev/meloda/fast/conversations/navigation/ConversationsNavigation.kt

@@ -8,7 +8,6 @@ import dev.meloda.fast.conversations.ConversationsViewModelImpl
 import dev.meloda.fast.conversations.presentation.ConversationsRoute
 import dev.meloda.fast.model.BaseError
 import dev.meloda.fast.ui.extensions.sharedViewModel
-import kotlinx.coroutines.flow.Flow
 import kotlinx.serialization.Serializable
 
 @Serializable
@@ -18,13 +17,11 @@ fun NavGraphBuilder.conversationsScreen(
     onError: (BaseError) -> Unit,
     onConversationItemClicked: (id: Int) -> Unit,
     onPhotoClicked: (url: String) -> Unit,
-    scrollToTopFlow: Flow<Int>,
     navController: NavController,
 ) {
     composable<Conversations> {
         val viewModel: ConversationsViewModel =
             it.sharedViewModel<ConversationsViewModelImpl>(navController = navController)
-        viewModel.setScrollToTopFlow(scrollToTopFlow)
 
         ConversationsRoute(
             onError = onError,

feature/conversations/src/main/kotlin/dev/meloda/fast/conversations/presentation/ConversationsScreen.kt

@@ -77,6 +77,7 @@ import dev.meloda.fast.model.BaseError
 import dev.meloda.fast.ui.components.ErrorView
 import dev.meloda.fast.ui.components.FullScreenLoader
 import dev.meloda.fast.ui.components.MaterialDialog
+import dev.meloda.fast.ui.components.NoItemsView
 import dev.meloda.fast.ui.theme.LocalBottomPadding
 import dev.meloda.fast.ui.theme.LocalHazeState
 import dev.meloda.fast.ui.theme.LocalThemeConfig
@@ -96,7 +97,6 @@ fun ConversationsRoute(
     val screenState by viewModel.screenState.collectAsStateWithLifecycle()
     val baseError by viewModel.baseError.collectAsStateWithLifecycle()
     val canPaginate by viewModel.canPaginate.collectAsStateWithLifecycle()
-    val isNeedToScrollToTop by viewModel.scrollToTop.collectAsStateWithLifecycle()
 
     ConversationsScreen(
         screenState = screenState,
@@ -114,9 +114,7 @@ fun ConversationsRoute(
         onRefresh = viewModel::onRefresh,
         onConversationPhotoClicked = onConversationPhotoClicked,
         setScrollIndex = viewModel::setScrollIndex,
-        setScrollOffset = viewModel::setScrollOffset,
+        setScrollOffset = viewModel::setScrollOffset
-        isNeedToScrollToTop = isNeedToScrollToTop,
-        onScrolledToTop = viewModel::onScrolledToTop
     )
 
     HandleDialogs(
@@ -143,9 +141,7 @@ fun ConversationsScreen(
     onRefresh: () -> Unit = {},
     onConversationPhotoClicked: (url: String) -> Unit = {},
     setScrollIndex: (Int) -> Unit = {},
-    setScrollOffset: (Int) -> Unit = {},
+    setScrollOffset: (Int) -> Unit = {}
-    isNeedToScrollToTop: Boolean = false,
-    onScrolledToTop: () -> Unit = {}
 ) {
     val view = LocalView.current
     val currentTheme = LocalThemeConfig.current
@@ -159,14 +155,6 @@ fun ConversationsScreen(
         initialFirstVisibleItemScrollOffset = screenState.scrollOffset
     )
 
-    LaunchedEffect(isNeedToScrollToTop) {
-        if (isNeedToScrollToTop) {
-            listState.scrollToItem(0)
-            onScrolledToTop()
-
-        }
-    }
-
     LaunchedEffect(listState) {
         snapshotFlow { listState.firstVisibleItemIndex }
             .debounce(500L)
@@ -207,10 +195,10 @@ fun ConversationsScreen(
 
     val toolbarContainerColor by animateColorAsState(
         targetValue =
-        if (currentTheme.enableBlur || !listState.canScrollBackward)
+            if (currentTheme.enableBlur || !listState.canScrollBackward)
-            MaterialTheme.colorScheme.surface
+                MaterialTheme.colorScheme.surface
-        else
+            else
-            MaterialTheme.colorScheme.surfaceColorAtElevation(3.dp),
+                MaterialTheme.colorScheme.surfaceColorAtElevation(3.dp),
         label = "toolbarColorAlpha",
         animationSpec = tween(durationMillis = 50)
     )
@@ -343,8 +331,8 @@ fun ConversationsScreen(
                 when (baseError) {
                     is BaseError.SessionExpired -> {
                         ErrorView(
-                            text = "Session expired",
+                            text = stringResource(UiR.string.session_expired),
-                            buttonText = "Log out",
+                            buttonText = stringResource(UiR.string.action_log_out),
                             onButtonClick = onSessionExpiredLogOutButtonClicked
                         )
                     }
@@ -352,7 +340,7 @@ fun ConversationsScreen(
                     is BaseError.SimpleError -> {
                         ErrorView(
                             text = baseError.message,
-                            buttonText = "Try again",
+                            buttonText = stringResource(UiR.string.try_again),
                             onButtonClick = onRefresh
                         )
                     }
@@ -398,6 +386,13 @@ fun ConversationsScreen(
                         padding = padding,
                         onPhotoClicked = onConversationPhotoClicked
                     )
+
+                    if (screenState.conversations.isEmpty()) {
+                        NoItemsView(
+                            buttonText = stringResource(UiR.string.action_refresh),
+                            onButtonClick = onRefresh
+                        )
+                    }
                 }
             }
         }

feature/friends/src/main/kotlin/dev/meloda/fast/friends/FriendsViewModel.kt

@@ -68,6 +68,7 @@ class FriendsViewModelImpl(
     }
 
     override fun onRefresh() {
+        onErrorConsumed()
         loadFriends(offset = 0)
     }
 
@@ -99,32 +100,12 @@ class FriendsViewModelImpl(
         friendsUseCase.getOnlineFriends(null, null)
             .listenValue(viewModelScope) { state ->
                 state.processState(
-                    error = { error ->
+                    error = ::handleError,
-                        if (error is State.Error.ApiError) {
-                            when (error.errorCode) {
-                                VkErrorCode.USER_AUTHORIZATION_FAILED -> {
-                                    baseError.setValue { BaseError.SessionExpired }
-                                }
-
-                                else -> Unit
-                            }
-                        }
-                    },
                     success = { userIds ->
                         loadUsersByIdsUseCase(userIds = userIds)
                             .listenValue(viewModelScope) { state ->
                                 state.processState(
-                                    error = { error ->
+                                    error = ::handleError,
-                                        if (error is State.Error.ApiError) {
-                                            when (error.errorCode) {
-                                                VkErrorCode.USER_AUTHORIZATION_FAILED -> {
-                                                    baseError.setValue { BaseError.SessionExpired }
-                                                }
-
-                                                else -> Unit
-                                            }
-                                        }
-                                    },
                                     success = { onlineFriends ->
                                         screenState.setValue { old ->
                                             old.copy(
@@ -142,17 +123,7 @@ class FriendsViewModelImpl(
         friendsUseCase.getFriends(count = LOAD_COUNT, offset = offset)
             .listenValue(viewModelScope) { state ->
                 state.processState(
-                    error = { error ->
+                    error = ::handleError,
-                        if (error is State.Error.ApiError) {
-                            when (error.errorCode) {
-                                VkErrorCode.USER_AUTHORIZATION_FAILED -> {
-                                    baseError.setValue { BaseError.SessionExpired }
-                                }
-
-                                else -> Unit
-                            }
-                        }
-                    },
                     success = { response ->
                         val itemsCountSufficient = response.size == LOAD_COUNT
                         canPaginate.setValue { itemsCountSufficient }
@@ -197,6 +168,40 @@ class FriendsViewModelImpl(
             }
     }
 
+    private fun handleError(error: State.Error) {
+        when (error) {
+            is State.Error.ApiError -> {
+                when (error.errorCode) {
+                    VkErrorCode.USER_AUTHORIZATION_FAILED -> {
+                        baseError.setValue { BaseError.SessionExpired }
+                    }
+
+                    else -> {
+                        baseError.setValue {
+                            BaseError.SimpleError(message = error.errorMessage)
+                        }
+                    }
+                }
+            }
+            State.Error.ConnectionError -> {
+                baseError.setValue {
+                    BaseError.SimpleError(message = "Connection error")
+                }
+            }
+            State.Error.InternalError -> {
+                baseError.setValue {
+                    BaseError.SimpleError(message = "Internal error")
+                }
+            }
+            State.Error.UnknownError -> {
+                baseError.setValue {
+                    BaseError.SimpleError(message = "Unknown error")
+                }
+            }
+            else -> Unit
+        }
+    }
+
     private fun updateFriendsNames(useContactNames: Boolean) {
         val friends = friends.value
         if (friends.isEmpty()) return

feature/friends/src/main/kotlin/dev/meloda/fast/friends/navigation/FriendsNavigation.kt

@@ -16,7 +16,8 @@ object Friends
 fun NavGraphBuilder.friendsScreen(
     onError: (BaseError) -> Unit,
     navController: NavController,
-    onPhotoClicked: (url: String) -> Unit
+    onPhotoClicked: (url: String) -> Unit,
+    onMessageClicked: (userId: Int) -> Unit
 ) {
     composable<Friends> {
         val viewModel: FriendsViewModel =
@@ -25,7 +26,8 @@ fun NavGraphBuilder.friendsScreen(
         FriendsRoute(
             onError = onError,
             viewModel = viewModel,
-            onPhotoClicked = onPhotoClicked
+            onPhotoClicked = onPhotoClicked,
+            onMessageClicked = onMessageClicked
         )
     }
 }

feature/friends/src/main/kotlin/dev/meloda/fast/friends/presentation/FriendItem.kt

@@ -12,6 +12,10 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.rounded.MailOutline
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -31,7 +35,8 @@ fun FriendItem(
     modifier: Modifier = Modifier,
     friend: UiFriend,
     maxLines: Int,
-    onPhotoClicked: (url: String) -> Unit
+    onPhotoClicked: (url: String) -> Unit,
+    onMessageClicked: (userId: Int) -> Unit
 ) {
     Row(
         modifier = modifier.fillMaxWidth(),
@@ -92,9 +97,24 @@ fun FriendItem(
             text = friend.title,
             minLines = 1,
             maxLines = maxLines,
-            style = MaterialTheme.typography.headlineSmall.copy(fontSize = 20.sp)
+            style = MaterialTheme.typography.headlineSmall.copy(fontSize = 20.sp),
+            modifier = Modifier.weight(1f)
         )
 
         Spacer(modifier = Modifier.width(16.dp))
+
+        IconButton(
+            onClick = {
+                onMessageClicked(friend.userId)
+            }
+        ) {
+            Icon(
+                imageVector = Icons.Rounded.MailOutline,
+                contentDescription = null,
+                tint = MaterialTheme.colorScheme.primary
+            )
+        }
+
+        Spacer(modifier = Modifier.width(16.dp))
     }
 }

feature/friends/src/main/kotlin/dev/meloda/fast/friends/presentation/FriendsList.kt

@@ -37,6 +37,7 @@ fun FriendsList(
     maxLines: Int,
     padding: PaddingValues,
     onPhotoClicked: (url: String) -> Unit,
+    onMessageClicked: (userId: Int) -> Unit,
     setCanScrollBackward: (Boolean) -> Unit
 ) {
     LaunchedEffect(listState) {
@@ -66,7 +67,8 @@ fun FriendsList(
             FriendItem(
                 friend = friend,
                 maxLines = maxLines,
-                onPhotoClicked = onPhotoClicked
+                onPhotoClicked = onPhotoClicked,
+                onMessageClicked = onMessageClicked
             )
 
             Spacer(modifier = Modifier.height(16.dp))

feature/friends/src/main/kotlin/dev/meloda/fast/friends/presentation/FriendsScreen.kt

@@ -48,8 +48,8 @@ import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import coil.imageLoader
 import coil.request.ImageRequest
-import dev.chrisbanes.haze.haze
+import dev.chrisbanes.haze.hazeEffect
-import dev.chrisbanes.haze.hazeChild
+import dev.chrisbanes.haze.hazeSource
 import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
 import dev.chrisbanes.haze.materials.HazeMaterials
 import dev.meloda.fast.friends.FriendsViewModel
@@ -72,6 +72,7 @@ import dev.meloda.fast.ui.R as UiR
 fun FriendsRoute(
     onError: (BaseError) -> Unit,
     onPhotoClicked: (url: String) -> Unit,
+    onMessageClicked: (userId: Int) -> Unit,
     viewModel: FriendsViewModel = koinViewModel<FriendsViewModelImpl>()
 ) {
     val context = LocalContext.current
@@ -99,11 +100,12 @@ fun FriendsRoute(
         onPaginationConditionsMet = viewModel::onPaginationConditionsMet,
         onRefresh = viewModel::onRefresh,
         onPhotoClicked = onPhotoClicked,
+        onMessageClicked = onMessageClicked,
         setSelectedTabIndex = viewModel::onTabSelected,
         setScrollIndex = viewModel::setScrollIndex,
         setScrollOffset = viewModel::setScrollOffset,
         setScrollIndexOnline = viewModel::setScrollIndexOnline,
-        setScrollOffsetOnline = viewModel::setScrollOffsetOnline,
+        setScrollOffsetOnline = viewModel::setScrollOffsetOnline
     )
 }
 
@@ -120,11 +122,12 @@ fun FriendsScreen(
     onPaginationConditionsMet: () -> Unit = {},
     onRefresh: () -> Unit = {},
     onPhotoClicked: (url: String) -> Unit = {},
+    onMessageClicked: (userId: Int) -> Unit = {},
     setSelectedTabIndex: (Int) -> Unit = {},
     setScrollIndex: (Int) -> Unit = {},
     setScrollOffset: (Int) -> Unit = {},
     setScrollIndexOnline: (Int) -> Unit = {},
-    setScrollOffsetOnline: (Int) -> Unit = {},
+    setScrollOffsetOnline: (Int) -> Unit = {}
 ) {
     val currentTheme = LocalThemeConfig.current
 
@@ -231,7 +234,7 @@ fun FriendsScreen(
                 modifier = Modifier
                     .then(
                         if (currentTheme.enableBlur) {
-                            Modifier.hazeChild(
+                            Modifier.hazeEffect(
                                 state = hazeState,
                                 style = HazeMaterials.thick()
                             )
@@ -281,12 +284,24 @@ fun FriendsScreen(
         }
     ) { padding ->
         when {
-            baseError is BaseError.SessionExpired -> {
+            baseError != null -> {
-                ErrorView(
+                when (baseError) {
-                    text = "Session expired",
+                    is BaseError.SessionExpired -> {
-                    buttonText = "Log out",
+                        ErrorView(
-                    onButtonClick = onSessionExpiredLogOutButtonClicked
+                            text = stringResource(UiR.string.session_expired),
-                )
+                            buttonText = stringResource(UiR.string.action_log_out),
+                            onButtonClick = onSessionExpiredLogOutButtonClicked
+                        )
+                    }
+
+                    is BaseError.SimpleError -> {
+                        ErrorView(
+                            text = baseError.message,
+                            buttonText = stringResource(UiR.string.try_again),
+                            onButtonClick = onRefresh
+                        )
+                    }
+                }
             }
 
             screenState.isLoading && screenState.friends.isEmpty() -> FullScreenLoader()
@@ -333,15 +348,17 @@ fun FriendsScreen(
                                 )
                             }
                         ) {
-                            val friendsToDisplay = if (index == 0) {
+                            val friendsToDisplay = remember(index) {
-                                screenState.friends
+                                if (index == 0) {
-                            } else {
+                                    screenState.friends
-                                screenState.onlineFriends
+                                } else {
+                                    screenState.onlineFriends
+                                }
                             }
 
                             FriendsList(
                                 modifier = if (currentTheme.enableBlur) {
-                                    Modifier.haze(state = hazeState)
+                                    Modifier.hazeSource(state = hazeState)
                                 } else {
                                     Modifier
                                 }.fillMaxSize(),
@@ -351,6 +368,7 @@ fun FriendsScreen(
                                 maxLines = maxLines,
                                 padding = padding,
                                 onPhotoClicked = onPhotoClicked,
+                                onMessageClicked = onMessageClicked,
                                 setCanScrollBackward = { can ->
                                     canScrollBackward = can
                                 }
@@ -358,10 +376,9 @@ fun FriendsScreen(
 
                             if (friendsToDisplay.isEmpty()) {
                                 NoItemsView(
-                                    modifier = Modifier
+                                    customText = if (index == 1) stringResource(UiR.string.no_online_friends) else null,
-                                        .padding(padding.calculateTopPadding())
+                                    buttonText = stringResource(UiR.string.action_refresh),
-                                        .padding(top = 16.dp),
+                                    onButtonClick = onRefresh
-                                    customText = "No${if (index == 1) " online" else ""} friends :("
                                 )
                             }
                         }