app/build.gradle

@@ -4,6 +4,8 @@ apply plugin: 'kotlin-android'
 
 apply plugin: 'kotlin-android-extensions'
 
+apply plugin: 'kotlin-kapt'
+
 android {
     compileSdkVersion 29
     buildToolsVersion "29.0.2"
@@ -21,19 +23,44 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+    packagingOptions {
+        exclude 'META-INF/atomicfu.kotlin_module'
+    }
 }
 
 dependencies {
-    // retrofit
-    implementation "com.squareup.retrofit2:retrofit:2.6.2"
-    implementation "com.squareup.retrofit2:converter-gson:2.6.2"
-
-    implementation project(':wrapper')
+    // standard
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.core:core-ktx:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'com.google.android.material:material:1.0.0'
+    // wrapper
+    implementation project(':wrapper')
+    // retrofit
+    implementation "com.squareup.retrofit2:retrofit:2.6.2"
+    implementation "com.squareup.retrofit2:converter-gson:2.6.2"
+    // room database
+    implementation "androidx.room:room-runtime:$rootProject.roomVersion"
+    implementation "androidx.room:room-ktx:$rootProject.roomVersion"
+    kapt "androidx.room:room-compiler:$rootProject.roomVersion"
+    // lifecycle components
+    implementation "androidx.lifecycle:lifecycle-extensions:$rootProject.archLifecycleVersion"
+    //noinspection LifecycleAnnotationProcessorWithJava8
+    kapt "androidx.lifecycle:lifecycle-compiler:$rootProject.archLifecycleVersion"
+    // ViewModel Kotlin support
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$rootProject.archLifecycleVersion"
+    // Coroutines
+    api "org.jetbrains.kotlinx:kotlinx-coroutines-android:$rootProject.coroutines"
+    // UI
+    implementation "com.google.android.material:material:$rootProject.materialVersion"
+
+
+    // TESTING
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    androidTestImplementation "androidx.room:room-testing:$rootProject.roomVersion"
+    androidTestImplementation "androidx.arch.core:core-testing:$rootProject.androidxArchVersion"
+    androidTestImplementation "androidx.arch.core:core-testing:$rootProject.coreTestingVersion"
 }

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="it.unisannio.ding.ids.wedroid.app">
 
+    <uses-permission android:name="android.permission.INTERNET"/>
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -9,6 +11,11 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <activity
+            android:name=".view.BoardsListsActivity"
+            android:label="@string/title_activity_boards_lists"
+            android:theme="@style/AppTheme.NoActionBar">
+        </activity>
         <activity android:name=".MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/it/unisannio/ding/ids/wedroid/app/MainActivity.kt

@@ -1,14 +1,21 @@
 package it.unisannio.ding.ids.wedroid.app
 
+import android.content.Intent
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
-import it.unisannio.ding.ids.wedroid.wrapper.api.BoardService
+import android.view.View
+import it.unisannio.ding.ids.wedroid.app.view.BoardsListsActivity
 
 class MainActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
-        val service : BoardService? = null
+    }
+
+    fun open(v: View) {
+        startActivity(
+            Intent(this, BoardsListsActivity::class.java)
+        )
     }
 }

app/src/main/java/it/unisannio/ding/ids/wedroid/app/data/dao/BoardDao.kt

@@ -0,0 +1,17 @@
+package it.unisannio.ding.ids.wedroid.app.data.dao
+
+import androidx.lifecycle.LiveData
+import androidx.room.*
+import it.unisannio.ding.ids.wedroid.app.data.entity.Board
+
+@Dao
+interface BoardDao {
+    @Query("SELECT * from board_table ORDER BY title ASC")
+    fun getAllBoard(): LiveData<List<Board>>
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insert(board: Board)
+
+    @Delete
+    suspend fun delete(board: Board)
+}

app/src/main/java/it/unisannio/ding/ids/wedroid/app/data/database/BoardDatabase.kt

@@ -0,0 +1,35 @@
+package it.unisannio.ding.ids.wedroid.app.data.database
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import it.unisannio.ding.ids.wedroid.app.data.dao.BoardDao
+import it.unisannio.ding.ids.wedroid.app.data.entity.Board
+
+@Database(entities = [Board::class], version = 1, exportSchema = false)
+abstract class BoardDatabase : RoomDatabase() {
+
+    abstract fun boardDao(): BoardDao
+
+    companion object {
+        @Volatile
+        private var INSTANCE: BoardDatabase? = null
+
+        fun getDatabase(context: Context): BoardDatabase {
+            val tempInstance = INSTANCE
+            if (tempInstance != null) {
+                return tempInstance
+            }
+            synchronized(this) {
+                val instance = Room.databaseBuilder(
+                    context.applicationContext,
+                    BoardDatabase::class.java,
+                    "board_database"
+                ).build()
+                INSTANCE = instance
+                return instance
+            }
+        }
+    }
+}

app/src/main/java/it/unisannio/ding/ids/wedroid/app/data/entity/Board.kt

@@ -0,0 +1,16 @@
+package it.unisannio.ding.ids.wedroid.app.data.entity
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "board_table")
+data class Board(
+    @PrimaryKey @ColumnInfo(name = "id") val id: String,
+    @ColumnInfo(name = "title") val title: String = ""
+)
+
+fun it.unisannio.ding.ids.wedroid.wrapper.entity.Board.convert(): Board {
+    return Board(this.id, this.title)
+}
+

app/src/main/java/it/unisannio/ding/ids/wedroid/app/data/repository/BoardRepository.kt

@@ -0,0 +1,138 @@
+package it.unisannio.ding.ids.wedroid.app.data.repository
+
+import android.util.Log
+import it.unisannio.ding.ids.wedroid.app.data.dao.BoardDao
+import it.unisannio.ding.ids.wedroid.app.data.entity.Board
+import it.unisannio.ding.ids.wedroid.app.data.entity.convert
+import it.unisannio.ding.ids.wedroid.app.util.PreferenceReader
+import it.unisannio.ding.ids.wedroid.wrapper.api.BoardService
+import it.unisannio.ding.ids.wedroid.wrapper.entity.BoardBackgroundColor
+import it.unisannio.ding.ids.wedroid.wrapper.entity.BoardPrototype
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+
+class BoardRepository(
+    private val dao: BoardDao,
+    private val service: BoardService,
+    private val reader: PreferenceReader
+) {
+    val allBoards by lazy {
+        dao.getAllBoard()
+    }
+
+    init {
+        synchronize()
+    }
+
+    fun insertBoard(title: String) {
+        service.newBoard(
+            BoardPrototype.Builder()
+                .setOwner(reader.userId)
+                .setTitle(title)
+                .setBackgroundColor(BoardBackgroundColor.LIMEGREEN)
+                .build()
+        ).enqueue(object : Callback<it.unisannio.ding.ids.wedroid.wrapper.entity.Board> {
+            override fun onFailure(
+                call: Call<it.unisannio.ding.ids.wedroid.wrapper.entity.Board>,
+                t: Throwable
+            ) = logNetworkError(t.message)
+
+            override fun onResponse(
+                call: Call<it.unisannio.ding.ids.wedroid.wrapper.entity.Board>,
+                response: Response<it.unisannio.ding.ids.wedroid.wrapper.entity.Board>
+            ) {
+                if (!response.isSuccessful) {
+                    logNetworkError("${response.code()} ${response.message()}")
+                    return
+                }
+
+                val board = response.body()
+
+                if (board == null) {
+                    logNetworkError("empty body")
+                    return
+                }
+
+                CoroutineScope(Dispatchers.IO).launch {
+                    dao.insert(Board(board.id, title))
+                }
+            }
+        })
+    }
+
+    fun synchronize() {
+        service.getBoardsFromUser(reader.userId)
+            .enqueue(object :
+                Callback<MutableList<it.unisannio.ding.ids.wedroid.wrapper.entity.Board>> {
+
+                override fun onFailure(
+                    call: Call<MutableList<it.unisannio.ding.ids.wedroid.wrapper.entity.Board>>,
+                    t: Throwable
+                ) = logNetworkError(t.message)
+
+                override fun onResponse(
+                    call: Call<MutableList<it.unisannio.ding.ids.wedroid.wrapper.entity.Board>>,
+                    response: Response<MutableList<it.unisannio.ding.ids.wedroid.wrapper.entity.Board>>
+                ) {
+                    if (!response.isSuccessful) {
+                        logNetworkError("${response.code()} ${response.message()}")
+                        return
+                    }
+
+                    // read boards from the body
+                    val boards = (response.body() ?: return)
+                        .map { it.convert() }
+
+                    addNewBoardToDb(boards)
+
+                    removeOldBoardsFromDb(boards)
+                }
+            })
+    }
+
+    fun deleteBoard(id: String) {
+        service.deleteBoard(id).enqueue(
+            object : Callback<Void> {
+                override fun onFailure(call: Call<Void>, t: Throwable) {
+                    logNetworkError(t.message)
+                }
+
+                override fun onResponse(call: Call<Void>, response: Response<Void>) {
+                    if (!response.isSuccessful) {
+                        logNetworkError("${response.code()}, ${response.message()}")
+                        return
+                    }
+
+                    CoroutineScope(Dispatchers.IO).launch {
+                        dao.delete(Board(id))
+                    }
+                }
+            })
+    }
+
+    private fun addNewBoardToDb(boards: Collection<Board>) {
+        boards.forEach {
+            CoroutineScope(Dispatchers.IO).launch {
+                dao.insert(it)
+            }
+        }
+    }
+
+    private fun removeOldBoardsFromDb(boards: Collection<Board>) {
+        allBoards.value?.minus(boards)
+            ?.forEach {
+                CoroutineScope(Dispatchers.IO).launch {
+                    dao.delete(it)
+                }
+            }
+    }
+
+    private fun logNetworkError(message: String?) {
+        Log.e("RETROFIT", message)
+    }
+}
+

app/src/main/java/it/unisannio/ding/ids/wedroid/app/view/BoardsListsActivity.kt

@@ -0,0 +1,38 @@
+package it.unisannio.ding.ids.wedroid.app.view
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProvider
+import androidx.recyclerview.widget.LinearLayoutManager
+import it.unisannio.ding.ids.wedroid.app.R
+import it.unisannio.ding.ids.wedroid.app.view.adapter.BoardsListAdapter
+import it.unisannio.ding.ids.wedroid.app.viewmodel.BoardListViewModel
+
+import kotlinx.android.synthetic.main.activity_boards_lists.*
+import kotlinx.android.synthetic.main.content_boards_lists.*
+
+class BoardsListsActivity : AppCompatActivity() {
+    private lateinit var viewModel: BoardListViewModel
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_boards_lists)
+        setSupportActionBar(toolbar)
+        viewModel = ViewModelProvider(this).get(BoardListViewModel::class.java)
+
+        val adapter = BoardsListAdapter(this)
+        boardList.adapter = adapter
+        boardList.layoutManager = LinearLayoutManager(this)
+
+        viewModel.allBoards.observe(this, Observer {
+            it.let { adapter.setBoards(it) }
+        })
+
+        fab.setOnClickListener { view ->
+            viewModel.insertBoard("New board")
+        }
+    }
+
+}
+

app/src/main/java/it/unisannio/ding/ids/wedroid/app/view/adapter/BoardsListAdapter.kt

@@ -0,0 +1,44 @@
+package it.unisannio.ding.ids.wedroid.app.view.adapter
+
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import it.unisannio.ding.ids.wedroid.app.R
+import it.unisannio.ding.ids.wedroid.app.data.entity.Board
+
+
+class BoardsListAdapter internal constructor(
+    context: Context
+) : RecyclerView.Adapter<BoardsListAdapter.BoardViewHolder>() {
+
+    private val inflater = LayoutInflater.from(context)
+    private var boards = emptyList<Board>()
+
+    inner class BoardViewHolder(
+        view: View
+    ) : RecyclerView.ViewHolder(view) {
+        val boardTitle: TextView = view.findViewById(R.id.boardTitle)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BoardViewHolder {
+        val view = inflater.inflate(R.layout.board_recycle_item, parent, false)
+        return BoardViewHolder(view)
+    }
+
+    override fun getItemCount(): Int {
+        return boards.size
+    }
+
+    override fun onBindViewHolder(holder: BoardViewHolder, position: Int) {
+        val board = boards[position]
+        holder.boardTitle.text = board.title
+    }
+
+    internal fun setBoards(boards: List<Board>) {
+        this.boards = boards
+        notifyDataSetChanged()
+    }
+}

app/src/main/java/it/unisannio/ding/ids/wedroid/app/viewmodel/BoardListViewModel.kt

@@ -0,0 +1,25 @@
+package it.unisannio.ding.ids.wedroid.app.viewmodel
+
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.LiveData
+import it.unisannio.ding.ids.wedroid.app.util.ServicesFactory
+import it.unisannio.ding.ids.wedroid.app.data.database.BoardDatabase
+import it.unisannio.ding.ids.wedroid.app.data.entity.Board
+import it.unisannio.ding.ids.wedroid.app.data.repository.BoardRepository
+import it.unisannio.ding.ids.wedroid.app.util.DumReader
+
+class BoardListViewModel(application: Application) : AndroidViewModel(application) {
+
+    private val repository: BoardRepository = BoardRepository(
+        BoardDatabase.getDatabase(application).boardDao(),
+        ServicesFactory.boardService,
+        DumReader()
+    )
+
+    val allBoards: LiveData<List<Board>> = repository.allBoards
+
+    fun insertBoard(title: String) = repository.insertBoard(title)
+
+    fun deleteBoard(id: String) = repository.deleteBoard(id)
+}

app/src/main/res/layout/activity_boards_lists.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".view.BoardsListsActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary"
+            app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <include layout="@layout/content_boards_lists" />
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="@dimen/fab_margin"
+        app:srcCompat="@android:drawable/ic_dialog_email" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_main.xml

@@ -7,6 +7,7 @@
     tools:context=".MainActivity">
 
     <TextView
+        android:id="@+id/textView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Hello World!"
@@ -15,4 +16,15 @@
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:onClick="open"
+        android:text="Button"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/board_recycle_item.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <TextView
+        android:id="@+id/boardTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="TextView" />
+
+</LinearLayout>

app/src/main/res/layout/content_boards_lists.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior"
+    tools:context=".view.BoardsListsActivity"
+    tools:showIn="@layout/activity_boards_lists">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:id="@+id/boardList"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values/dimens.xml

@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="fab_margin">16dp</dimen>
+</resources>

app/src/main/res/values/strings.xml

@@ -1,3 +1,5 @@
 <resources>
     <string name="app_name">wedroid</string>
+    <string name="title_activity_boards_list">BoardsListActivity</string>
+    <string name="title_activity_boards_lists">Boards</string>
 </resources>

app/src/main/res/values/styles.xml

@@ -8,4 +8,13 @@
         <item name="colorAccent">@color/colorAccent</item>
     </style>
 
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+
 </resources>

build.gradle

@@ -23,6 +23,15 @@ allprojects {
     }
 }
 
+ext {
+    roomVersion = '2.2.2'
+    archLifecycleVersion = '2.2.0-rc02'
+    androidxArchVersion = '2.1.0'
+    coreTestingVersion = "2.1.0"
+    coroutines = '1.3.2'
+    materialVersion = "1.0.0"
+}
+
 task clean(type: Delete) {
     delete rootProject.buildDir
 }