Initial commit

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
+

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+    id 'kotlinx-serialization'
+    id 'kotlin-kapt'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "dev.androidbroadcast.sample.paging3"
+        minSdkVersion 21
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+
+        buildConfigField 'String', 'NEWS_API_KEY', '"a3aebd96c7c94de09b552a2aee1675d4"'
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    buildFeatures {
+        viewBinding true
+    }
+}
+
+dependencies {
+    //noinspection GradleDependency
+    implementation 'androidx.core:core-ktx:1.5.0-rc02'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'androidx.activity:activity-ktx:1.2.3'
+    implementation 'androidx.fragment:fragment-ktx:1.3.3'
+    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+
+    def lifecycleVersion = '2.4.0-alpha01'
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycleVersion"
+    implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycleVersion"
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycleVersion"
+
+    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
+    implementation "com.squareup.okhttp3:okhttp:4.9.0"
+
+    implementation 'org.jetbrains.kotlinx:kotlinx-serialization-json:1.2.0'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0-RC'
+
+    implementation "com.jakewharton.retrofit:retrofit2-kotlinx-serialization-converter:0.8.0"
+    implementation 'com.github.kirich1409:viewbindingpropertydelegate-noreflection:1.4.6'
+    implementation "io.coil-kt:coil:1.2.1"
+
+    def roomVersion = "2.3.0"
+    implementation "androidx.room:room-runtime:$roomVersion"
+    implementation "androidx.room:room-ktx:$roomVersion"
+    kapt "androidx.room:room-compiler:$roomVersion"
+
+    def daggerVersion = "2.35.1"
+    implementation "com.google.dagger:dagger:$daggerVersion"
+    kapt "com.google.dagger:dagger-compiler:$daggerVersion"
+
+    testImplementation 'junit:junit:4.13.2'
+
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}

app/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

app/src/androidTest/java/dev/androidbroadcast/sample/paging3/ExampleInstrumentedTest.kt

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+package dev.androidbroadcast.sample.paging3
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("dev.androidbroadcast.sample.paging3", appContext.packageName)
+    }
+}

app/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="dev.androidbroadcast.sample.paging3"
+    >
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+        android:name=".NewsApplication"
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.News"
+        >
+
+        <activity android:name=".ui.home.HomeActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/dev/androidbroadcast/sample/paging3/Dispatchers.kt

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+package dev.androidbroadcast.sample.paging3
+
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+
+class Dispatchers(
+    val default: CoroutineDispatcher,
+    val io: CoroutineDispatcher,
+    val main: CoroutineDispatcher,
+) {
+
+    companion object {
+
+        val Default = Dispatchers(
+            default = Dispatchers.Default,
+            io = Dispatchers.IO,
+            main = Dispatchers.Main.immediate,
+        )
+    }
+}

app/src/main/java/dev/androidbroadcast/sample/paging3/NewsApplication.kt

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+package dev.androidbroadcast.sample.paging3
+
+import android.app.Application
+import android.content.Context
+import dev.androidbroadcast.sample.paging3.di.AppComponent
+import dev.androidbroadcast.sample.paging3.di.DaggerAppComponent
+
+
+class NewsApplication : Application() {
+
+    private var _appComponent: AppComponent? = null
+
+    val appComponent: AppComponent
+        get() = checkNotNull(_appComponent)
+
+    override fun onCreate() {
+        super.onCreate()
+        _appComponent = DaggerAppComponent.builder()
+            .application(this)
+            .create()
+    }
+}
+
+val Context.appComponent: AppComponent
+    get() = when (this) {
+        is NewsApplication -> appComponent
+        else -> (applicationContext as NewsApplication).appComponent
+    }

app/src/main/java/dev/androidbroadcast/sample/paging3/data/Mappers.kt

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+package dev.androidbroadcast.sample.paging3.data
+
+import dev.androidbroadcast.sample.paging3.data.model.Article
+import dev.androidbroadcast.sample.paging3.data.model.Source
+import dev.androidbroadcast.sample.paging3.data.network.model.ArticleDto
+import dev.androidbroadcast.sample.paging3.data.network.model.SourceDto
+import dev.androidbroadcast.sample.paging3.data.storage.model.ArticleWithSourceDbo
+import dev.androidbroadcast.sample.paging3.data.storage.model.SourceDbo
+
+internal fun ArticleWithSourceDbo.toArticle(): Article {
+    return Article(
+        source = this.source.toSource(),
+        title = article.title,
+        url = article.url,
+        description = article.description,
+        author = article.author,
+        urlToImage = article.urlToImage,
+        publishedAt = article.publishedAt,
+        content = article.content
+    )
+}
+
+internal fun ArticleDto.toArticle(): Article {
+    return Article(
+        source = this.source?.toSource(),
+        title = title,
+        url = url,
+        description = description,
+        author = author,
+        urlToImage = urlToImage,
+        publishedAt = publishedAt,
+        content = content
+    )
+}
+
+private fun SourceDto.toSource(): Source {
+    return Source(id = id, name = name)
+}
+
+internal fun SourceDbo.toSource(): Source {
+    return Source(id = sourceId, name = name)
+}

app/src/main/java/dev/androidbroadcast/sample/paging3/data/NewsRepository.kt

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+package dev.androidbroadcast.sample.paging3.data
+
+import dev.androidbroadcast.sample.paging3.data.model.Article
+import dev.androidbroadcast.sample.paging3.data.network.NewsService
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.flow.map
+import javax.inject.Inject
+
+class NewsRepository @Inject constructor(
+    private val newsService: NewsService,
+) {
+
+    fun queryAll(query: String): Flow<List<Article>> {
+        if (query.isBlank()) return flowOf(emptyList())
+
+        return flow {
+            val response = newsService.everything(query)
+            emit(response.body()!!.articles)
+        }
+            .map { articles ->
+                articles.map { article ->
+                    article.toArticle()
+                }
+            }
+    }
+}

app/src/main/java/dev/androidbroadcast/sample/paging3/data/model/Article.kt

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+package dev.androidbroadcast.sample.paging3.data.model
+
+data class Article(
+    val source: Source?,
+    val title: String,
+    val url: String?,
+    val description: String?,
+    val author: String?,
+    val urlToImage: String?,
+    val publishedAt: String?,
+    val content: String?,
+)

app/src/main/java/dev/androidbroadcast/sample/paging3/data/model/Source.kt

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+package dev.androidbroadcast.sample.paging3.data.model
+
+data class Source(
+    val id: String?,
+    val name: String,
+)

app/src/main/java/dev/androidbroadcast/sample/paging3/data/network/AuthInterceptor.kt

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+package dev.androidbroadcast.sample.paging3.data.network
+
+import okhttp3.Interceptor
+import okhttp3.Response
+
+class AuthInterceptor(private val apiKey: String) : Interceptor {
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val request = chain.request().newBuilder()
+            .addHeader(API_KEY_HEADER, apiKey)
+            .build()
+
+        return chain.proceed(request)
+    }
+
+    private companion object {
+
+        private const val API_KEY_HEADER = "X-Api-Key"
+    }
+}