New cache system

Refactoring
Separation into libraries

mvp/.gitignore

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+/build

mvp/build.gradle

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+plugins {
+    id 'com.android.library'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        minSdkVersion 21
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        consumerProguardFiles "consumer-rules.pro"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+}

mvp/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

mvp/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.meloda.mvp">
+
+</manifest>

mvp/src/main/java/com/meloda/mvp/MvpBase.kt

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+package com.meloda.mvp
+
+import android.app.Application
+import android.os.Handler
+
+object MvpBase {
+
+    lateinit var handler: Handler
+
+    fun init(application: Application) {
+        handler = Handler(application.mainLooper)
+    }
+
+    fun init(appHandler: Handler) {
+        handler = appHandler
+    }
+
+    fun post(runnable: Runnable) {
+        handler.post(runnable)
+    }
+}

mvp/src/main/java/com/meloda/mvp/MvpConstants.kt

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+package com.meloda.mvp
+
+object MvpConstants {
+
+    const val PEER_ID = "_peer_id"
+    const val ID = "_id"
+    const val COUNT = "_count"
+    const val OFFSET = "_offset"
+    const val FROM_CACHE = "_from_cache"
+
+}

mvp/src/main/java/com/meloda/mvp/MvpException.kt

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+package com.meloda.mvp
+
+class MvpException(var errorId: String) : Exception(errorId)

mvp/src/main/java/com/meloda/mvp/MvpFields.kt

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+package com.meloda.mvp
+
+import android.util.ArrayMap
+import java.util.*
+
+@Suppress("UNCHECKED_CAST")
+class MvpFields {
+    private val fields = ArrayMap<String, Any>()
+
+    fun put(key: String, value: Any): MvpFields {
+        fields[key] = value
+        return this
+    }
+
+    operator fun <T> get(key: String): T {
+        return fields[key] as T
+    }
+
+    fun getNonNull(key: String): Any {
+        return fields[key]!!
+    }
+
+    fun getNonNull(`object`: Any): Any {
+        return Objects.requireNonNull(`object`)
+    }
+
+    fun getFields(): Map<String, Any> {
+        return fields
+    }
+}

mvp/src/main/java/com/meloda/mvp/MvpOnLoadListener.kt

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+package com.meloda.mvp
+
+interface MvpOnLoadListener {
+
+    fun onSuccess()
+
+    fun onError(t: Throwable)
+
+}

mvp/src/main/java/com/meloda/mvp/MvpOnResponseListener.kt

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+package com.meloda.mvp
+
+interface MvpOnResponseListener<T> {
+
+    fun onResponse(response: T)
+
+    fun onError(t: Throwable)
+
+}

mvp/src/main/java/com/meloda/mvp/MvpPresenter.kt

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+package com.meloda.mvp
+
+import android.content.Context
+import android.os.Bundle
+
+@Suppress("UNCHECKED_CAST")
+abstract class MvpPresenter<MainItem, Repository : MvpRepository<MainItem>, V : MvpView>(
+    protected var viewState: V,
+    private val repositoryStringClassName: String
+) {
+
+    protected var context: Context? = null
+
+    protected fun requireContext(): Context {
+        if (context == null) throw IllegalStateException("context is null")
+
+        return context!!
+    }
+
+    enum class ListState {
+        EMPTY, EMPTY_LOADING, EMPTY_NO_INTERNET, EMPTY_ERROR, FILLED, FILLED_LOADING
+    }
+
+    protected var tag: String = ""
+
+    lateinit var repository: Repository
+
+    init {
+        initRepository()
+    }
+
+    private fun initRepository() {
+        val clazz = Class.forName(repositoryStringClassName)
+
+        this.repository = clazz.newInstance() as Repository
+    }
+
+    open fun onCreate(context: Context, bundle: Bundle? = null) {
+        this.context = context
+    }
+
+    open fun onCreateView(bundle: Bundle? = null) {}
+    open fun onViewCreated(bundle: Bundle? = null) {}
+
+    protected fun post(runnable: Runnable) {
+        MvpBase.post(runnable)
+    }
+
+    open fun destroy() {}
+
+    fun prepareViews() {
+        viewState.prepareNoItemsView()
+        viewState.prepareNoInternetView()
+        viewState.prepareErrorView()
+    }
+
+    fun setState(state: ListState) {
+        when (state) {
+            ListState.EMPTY -> {
+                viewState.hideRefreshLayout()
+                viewState.hideProgressBar()
+                viewState.showNoItemsView()
+                viewState.hideNoInternetView()
+                viewState.hideErrorView()
+            }
+            ListState.EMPTY_LOADING -> {
+                viewState.hideRefreshLayout()
+                viewState.showProgressBar()
+                viewState.hideNoItemsView()
+                viewState.hideNoInternetView()
+                viewState.hideErrorView()
+            }
+            ListState.EMPTY_NO_INTERNET -> {
+                viewState.hideRefreshLayout()
+                viewState.hideProgressBar()
+                viewState.hideNoItemsView()
+                viewState.showNoInternetView()
+                viewState.hideErrorView()
+            }
+            ListState.EMPTY_ERROR -> {
+                viewState.hideRefreshLayout()
+                viewState.hideProgressBar()
+                viewState.hideNoItemsView()
+                viewState.hideNoInternetView()
+                viewState.showErrorView()
+            }
+            ListState.FILLED -> {
+                viewState.hideRefreshLayout()
+                viewState.hideProgressBar()
+                viewState.hideNoItemsView()
+                viewState.hideNoInternetView()
+                viewState.hideErrorView()
+            }
+            ListState.FILLED_LOADING -> {
+                viewState.showRefreshLayout()
+                viewState.hideProgressBar()
+                viewState.hideNoItemsView()
+                viewState.hideNoInternetView()
+                viewState.hideErrorView()
+            }
+        }
+    }
+
+}

mvp/src/main/java/com/meloda/mvp/MvpRepository.kt

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+package com.meloda.mvp
+
+@Suppress("UNCHECKED_CAST")
+abstract class MvpRepository<T> {
+
+    protected fun <Item> sendError(
+        listener: MvpOnResponseListener<Item>,
+        t: Throwable
+    ) {
+        MvpBase.post { listener.onError(t) }
+    }
+
+    protected fun <Item> sendResponseArray(
+        listener: MvpOnResponseListener<ArrayList<Item>>,
+        response: ArrayList<Item>
+    ) {
+        listener.let { MvpBase.handler.post { listener.onResponse(response) } }
+    }
+
+    protected fun <Item> sendResponse(
+        listener: MvpOnResponseListener<Item>,
+        response: Item
+    ) {
+        listener.let {
+            MvpBase.handler.post { listener.onResponse(response) }
+        }
+    }
+}

mvp/src/main/java/com/meloda/mvp/MvpView.kt

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+package com.meloda.mvp
+
+interface MvpView {
+
+    fun showErrorSnackbar(t: Throwable)
+
+    fun prepareNoItemsView()
+
+    fun showNoItemsView()
+
+    fun hideNoItemsView()
+
+    fun prepareNoInternetView()
+
+    fun showNoInternetView()
+
+    fun hideNoInternetView()
+
+    fun prepareErrorView()
+
+    fun showErrorView()
+
+    fun hideErrorView()
+
+    fun showProgressBar()
+
+    fun hideProgressBar()
+
+    fun showRefreshLayout()
+
+    fun hideRefreshLayout()
+
+}