Removed sealed class

app/src/main/AndroidManifest.xml

@@ -105,7 +105,7 @@
                 <data android:mimeType="vnd.android.cursor.dir/audio" />
             </intent-filter>
         </activity>
-        <activity android:name=".activities.AlbumDetailsActivity" />
+        <activity android:name=".activities.albums.AlbumDetailsActivity" />
         <activity android:name=".activities.ArtistDetailActivity" />
         <activity android:name=".activities.PlaylistDetailActivity" />
         <activity android:name=".activities.PlayingQueueActivity" />

app/src/main/java/code/name/monkey/retromusic/activities/albums/AlbumDetailsActivity.kt

@@ -1,4 +1,4 @@
-package code.name.monkey.retromusic.activities
+package code.name.monkey.retromusic.activities.albums
 
 import android.app.ActivityOptions
 import android.content.Intent
@@ -10,13 +10,13 @@ import android.view.SubMenu
 import android.view.View
 import android.widget.ImageView
 import androidx.core.app.ActivityCompat
+import androidx.lifecycle.ViewModelProvider
 import androidx.recyclerview.widget.DefaultItemAnimator
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.LinearLayoutManager
 import code.name.monkey.appthemehelper.util.ATHUtil
 import code.name.monkey.appthemehelper.util.MaterialUtil
 import code.name.monkey.appthemehelper.util.ToolbarContentTintHelper
-import code.name.monkey.retromusic.App
 import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.activities.base.AbsSlidingMusicPanelActivity
 import code.name.monkey.retromusic.activities.tageditor.AbsTagEditorActivity
@@ -37,7 +37,6 @@ import code.name.monkey.retromusic.helper.SortOrder.AlbumSongSortOrder
 import code.name.monkey.retromusic.interfaces.CabHolder
 import code.name.monkey.retromusic.model.Album
 import code.name.monkey.retromusic.model.Artist
-import code.name.monkey.retromusic.mvp.presenter.AlbumDetailsPresenter
 import code.name.monkey.retromusic.mvp.presenter.AlbumDetailsView
 import code.name.monkey.retromusic.rest.model.LastFmAlbum
 import code.name.monkey.retromusic.util.*
@@ -47,7 +46,6 @@ import com.bumptech.glide.Glide
 import kotlinx.android.synthetic.main.activity_album.*
 import kotlinx.android.synthetic.main.activity_album_content.*
 import java.util.*
-import javax.inject.Inject
 import android.util.Pair as UtilPair
 
 class AlbumDetailsActivity : AbsSlidingMusicPanelActivity(), AlbumDetailsView, CabHolder {
@@ -70,6 +68,7 @@ class AlbumDetailsActivity : AbsSlidingMusicPanelActivity(), AlbumDetailsView, C
         return cab as MaterialCab
     }
 
+    private lateinit var viewModel: AlbumDetailsViewModel
     private lateinit var simpleSongAdapter: SimpleSongAdapter
     private lateinit var album: Album
     private lateinit var artistImage: ImageView
@@ -81,9 +80,6 @@ class AlbumDetailsActivity : AbsSlidingMusicPanelActivity(), AlbumDetailsView, C
         return wrapSlidingMusicPanel(R.layout.activity_album)
     }
 
-    @Inject
-    lateinit var albumDetailsPresenter: AlbumDetailsPresenter
-
     private fun windowEnterTransition() {
         val slide = Slide()
         slide.excludeTarget(R.id.appBarLayout, true)
@@ -104,14 +100,21 @@ class AlbumDetailsActivity : AbsSlidingMusicPanelActivity(), AlbumDetailsView, C
         window.sharedElementsUseOverlay = true
         windowEnterTransition()
 
-        App.musicComponent.inject(this)
-        albumDetailsPresenter.attachView(this)
         val albumId = extraNotNull<Int>(EXTRA_ALBUM_ID).value
-        albumDetailsPresenter.loadAlbum(albumId)
-
         ActivityCompat.postponeEnterTransition(this)
+        val viewModelFactory = AlbumDetailsViewModelFactory(application, albumId)
+        viewModel = ViewModelProvider(this, viewModelFactory).get(AlbumDetailsViewModel::class.java)
+        viewModel.getAlbum().observe(this, androidx.lifecycle.Observer {
+            ActivityCompat.startPostponedEnterTransition(this@AlbumDetailsActivity)
+            album(it)
+        })
+        viewModel.getArtist().observe(this, androidx.lifecycle.Observer {
+            loadArtistImage(it)
+        })
+        viewModel.getAlbumInfo().observe(this, androidx.lifecycle.Observer {
+            aboutAlbum(it)
+        })
         setupRecyclerView()
-
         artistImage = findViewById(R.id.artistImage)
         artistImage.setOnClickListener {
             val artistPairs = ActivityOptions.makeSceneTransitionAnimation(
@@ -149,11 +152,6 @@ class AlbumDetailsActivity : AbsSlidingMusicPanelActivity(), AlbumDetailsView, C
         }
     }
 
-    override fun onDestroy() {
-        super.onDestroy()
-        albumDetailsPresenter.detachView()
-    }
-
     override fun complete() {
         ActivityCompat.startPostponedEnterTransition(this)
     }
@@ -191,8 +189,6 @@ class AlbumDetailsActivity : AbsSlidingMusicPanelActivity(), AlbumDetailsView, C
         }
         loadAlbumCover()
         simpleSongAdapter.swapDataSet(album.songs)
-        albumDetailsPresenter.loadMore(album.artistId)
-        albumDetailsPresenter.aboutAlbum(album.artistName ?: "-", album.title ?: "-")
     }
 
     override fun moreAlbums(albums: List<Album>) {
@@ -321,7 +317,10 @@ class AlbumDetailsActivity : AbsSlidingMusicPanelActivity(), AlbumDetailsView, C
                     albumCoverContainer,
                     "${getString(R.string.transition_album_art)}_${album.id}"
                 )
-                startActivityForResult(intent, TAG_EDITOR_REQUEST, options.toBundle())
+                startActivityForResult(
+                    intent,
+                    TAG_EDITOR_REQUEST, options.toBundle()
+                )
                 return true
             }
             /*Sort*/
@@ -378,15 +377,6 @@ class AlbumDetailsActivity : AbsSlidingMusicPanelActivity(), AlbumDetailsView, C
         album.songs?.let { simpleSongAdapter.swapDataSet(it) }
     }
 
-    override fun onMediaStoreChanged() {
-        super.onMediaStoreChanged()
-        reload()
-    }
-
-    private fun reload() {
-        val albumId = extraNotNull<Int>(EXTRA_ALBUM_ID).value
-        albumDetailsPresenter.loadAlbum(albumId)
-    }
 
     override fun onBackPressed() {
         if (cab != null && cab!!.isActive) {

app/src/main/java/code/name/monkey/retromusic/activities/albums/AlbumDetailsViewModel.kt

@@ -0,0 +1,53 @@
+package code.name.monkey.retromusic.activities.albums
+
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.viewModelScope
+import code.name.monkey.retromusic.model.Album
+import code.name.monkey.retromusic.model.Artist
+import code.name.monkey.retromusic.providers.RepositoryImpl
+import code.name.monkey.retromusic.rest.model.LastFmAlbum
+import kotlinx.coroutines.Deferred
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.launch
+
+class AlbumDetailsViewModel(
+    application: Application,
+    private val albumId: Int
+) : AndroidViewModel(application) {
+    private val _repository = RepositoryImpl(application.applicationContext)
+    private val _album = MutableLiveData<Album>()
+    private val _artist = MutableLiveData<Artist>()
+    private val _lastFmAlbum = MutableLiveData<LastFmAlbum>()
+
+    fun getAlbum(): LiveData<Album> = _album
+    fun getArtist(): LiveData<Artist> = _artist
+    fun getAlbumInfo(): LiveData<LastFmAlbum> = _lastFmAlbum
+
+    init {
+        loadDetails()
+    }
+
+    private fun loadDetails() = viewModelScope.launch {
+        _album.value = loadAlbumAsync.await() ?: throw NullPointerException("Album couldn't found")
+    }
+
+    private fun loadAlbumInfoAsync(album: Album) = viewModelScope.async(Dispatchers.IO) {
+        _repository.albumInfo(album.artistName ?: "-", album.title ?: "-")
+    }
+
+    private fun loadArtistAsync(artistId: Int) = viewModelScope.async(Dispatchers.IO) {
+        _repository.artistById(artistId)
+    }
+
+    private val loadAlbumAsync: Deferred<Album?>
+        get() = viewModelScope.async(Dispatchers.IO) {
+            _repository.albumById(albumId).apply {
+                _artist.value = loadArtistAsync(artistId).await()
+                _lastFmAlbum.value = loadAlbumInfoAsync(this).await()
+            }
+        }
+}

app/src/main/java/code/name/monkey/retromusic/activities/albums/AlbumDetailsViewModelFactory.kt

@@ -0,0 +1,19 @@
+package code.name.monkey.retromusic.activities.albums
+
+import android.app.Application
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+
+class AlbumDetailsViewModelFactory(
+    private val application: Application,
+    private val albumId: Int
+) :
+    ViewModelProvider.AndroidViewModelFactory(application) {
+    override fun <T : ViewModel?> create(modelClass: Class<T>): T {
+        return if (modelClass.isAssignableFrom(AlbumDetailsViewModel::class.java)) {
+            AlbumDetailsViewModel(application, albumId) as T
+        } else {
+            throw IllegalArgumentException("ViewModel Not Found")
+        }
+    }
+}

app/src/main/java/code/name/monkey/retromusic/dagger/MusicComponent.kt

@@ -14,7 +14,10 @@
 
 package code.name.monkey.retromusic.dagger
 
-import code.name.monkey.retromusic.activities.*
+import code.name.monkey.retromusic.activities.ArtistDetailActivity
+import code.name.monkey.retromusic.activities.GenreDetailsActivity
+import code.name.monkey.retromusic.activities.PlaylistDetailActivity
+import code.name.monkey.retromusic.activities.SearchActivity
 import code.name.monkey.retromusic.dagger.module.AppModule
 import code.name.monkey.retromusic.dagger.module.PresenterModule
 import code.name.monkey.retromusic.fragments.albums.AlbumsFragment
@@ -50,8 +53,6 @@ interface MusicComponent {
 
     fun inject(artistDetailActivity: ArtistDetailActivity)
 
-    fun inject(albumDetailsActivity: AlbumDetailsActivity)
-
     fun inject(playlistDetailActivity: PlaylistDetailActivity)
 
     fun inject(genreDetailsActivity: GenreDetailsActivity)

app/src/main/java/code/name/monkey/retromusic/fragments/LibraryViewModel.kt

@@ -5,8 +5,6 @@ import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.viewModelScope
-import code.name.monkey.retromusic.Result.Error
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.fragments.ReloadType.*
 import code.name.monkey.retromusic.interfaces.MusicServiceEventListener
 import code.name.monkey.retromusic.model.*
@@ -60,8 +58,8 @@ class LibraryViewModel(application: Application) :
             _repository.favoritePlaylist()
         )
         for (r in result) {
-            if (r is Success) {
+            if (r != null) {
-                list.add(r.data)
+                list.add(r)
             }
         }
         _homeSections.value = list
@@ -69,41 +67,27 @@ class LibraryViewModel(application: Application) :
 
     private val loadSongs: Deferred<List<Song>>
         get() = viewModelScope.async(IO) {
-            when (val result = _repository.allSongs()) {
+            _repository.allSongs()
-                is Success -> result.data
-                is Error -> arrayListOf()
-            }
         }
 
     private val loadAlbums: Deferred<List<Album>>
         get() = viewModelScope.async(IO) {
-            when (val result = _repository.allAlbums()) {
+            _repository.allAlbums()
-                is Success -> result.data
-                is Error -> arrayListOf()
-            }
         }
+
     private val loadArtists: Deferred<List<Artist>>
         get() = viewModelScope.async(IO) {
-            when (val result = _repository.allArtists()) {
+            _repository.allArtists()
-                is Success -> result.data
-                is Error -> arrayListOf()
-            }
         }
 
     private val loadPlaylists: Deferred<List<Playlist>>
         get() = viewModelScope.async(IO) {
-            when (val result = _repository.allPlaylists()) {
+            _repository.allPlaylists()
-                is Success -> result.data
-                is Error -> arrayListOf()
-            }
         }
 
     private val loadGenres: Deferred<List<Genre>>
         get() = viewModelScope.async(IO) {
-            when (val result = _repository.allGenres()) {
+            _repository.allGenres()
-                is Success -> result.data
-                is Error -> arrayListOf()
-            }
         }
 
     fun forceReload(reloadType: ReloadType) = viewModelScope.launch {

app/src/main/java/code/name/monkey/retromusic/fragments/mainactivity/FoldersFragment.java

@@ -307,10 +307,10 @@ public class FoldersFragment extends AbsMainActivityFragment implements
                             String.format(getString(R.string.not_listed_in_media_store), file1.getName())),
                             Snackbar.LENGTH_LONG)
                             .setAction(R.string.action_scan,
-                                    v -> new ListPathsAsyncTask(getActivity(), this::scanPaths)
+                                    v -> new ListPathsAsyncTask(requireActivity(), this::scanPaths)
                                             .execute(
                                                     new ListPathsAsyncTask.LoadingInfo(finalFile, AUDIO_FILE_FILTER)))
-                            .setActionTextColor(ThemeStore.Companion.accentColor(getActivity()))
+                            .setActionTextColor(ThemeStore.Companion.accentColor(requireActivity()))
                             .show();
                 }
             }).execute(new ListSongsAsyncTask.LoadingInfo(toList(file.getParentFile()), fileFilter,

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/AlbumDetailsPresenter.kt

@@ -14,14 +14,16 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.model.Album
 import code.name.monkey.retromusic.model.Artist
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
 import code.name.monkey.retromusic.rest.model.LastFmAlbum
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 
@@ -57,19 +59,15 @@ interface AlbumDetailsPresenter : Presenter<AlbumDetailsView> {
 
         override fun loadMore(artistId: Int) {
             launch {
-                when (val result = repository.artistById(artistId)) {
+                val result = repository.artistById(artistId)
-                    is Success -> withContext(Dispatchers.Main) { showArtistImage(result.data) }
+                showArtistImage(result)
-                    is Error -> withContext(Dispatchers.Main) {}
-                }
             }
         }
 
         override fun aboutAlbum(artist: String, album: String) {
             launch {
-                when (val result = repository.albumInfo(artist, album)) {
+                val result = repository.albumInfo(artist, album)
-                    is Success -> withContext(Dispatchers.Main) { view.aboutAlbum(result.data) }
+                view.aboutAlbum(result)
-                    is Error -> withContext(Dispatchers.Main) {}
-                }
             }
         }
 
@@ -83,13 +81,10 @@ interface AlbumDetailsPresenter : Presenter<AlbumDetailsView> {
 
         override fun loadAlbum(albumId: Int) {
             launch {
-                when (val result = repository.albumById(albumId)) {
+                val result = repository.albumById(albumId)
-                    is Success -> withContext(Dispatchers.Main) {
+                album = result
-                        album = result.data
+                view?.album(result)
-                        view?.album(result.data)
+
-                    }
-                    is Error -> withContext(Dispatchers.Main) { view?.complete() }
-                }
             }
         }
 

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/AlbumPresenter.kt

@@ -14,14 +14,15 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result.Error
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.model.Album
 import code.name.monkey.retromusic.mvp.BaseView
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 
@@ -53,10 +54,8 @@ interface AlbumsPresenter : Presenter<AlbumsView> {
 
         override fun loadAlbums() {
             launch {
-                when (val result = repository.allAlbums()) {
+                val result = repository.allAlbums()
-                    is Success -> withContext(Dispatchers.Main) { view?.albums(result.data) }
+                view?.albums(result)
-                    is Error -> withContext(Dispatchers.Main) { view?.showEmptyView() }
-                }
             }
         }
     }

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/ArtistDetailsPresenter.kt

@@ -14,15 +14,16 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result.Error
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.model.Artist
 import code.name.monkey.retromusic.mvp.BaseView
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
 import code.name.monkey.retromusic.rest.model.LastFmArtist
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import java.util.*
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
@@ -60,19 +61,15 @@ interface ArtistDetailsPresenter : Presenter<ArtistDetailsView> {
 
         override fun loadBiography(name: String, lang: String?, cache: String?) {
             launch {
-                when (val result = repository.artistInfo(name, lang, cache)) {
+                val result = repository.artistInfo(name, lang, cache)
-                    is Success -> withContext(Dispatchers.Main) { view?.artistInfo(result.data) }
+                view?.artistInfo(result)
-                    is Error -> withContext(Dispatchers.Main) {}
-                }
             }
         }
 
         override fun loadArtist(artistId: Int) {
             launch {
-                when (val result = repository.artistById(artistId)) {
+                val result = repository.artistById(artistId)
-                    is Success -> withContext(Dispatchers.Main) { view?.artist(result.data) }
+                view?.artist(result)
-                    is Error -> withContext(Dispatchers.Main) { view?.showEmptyView() }
-                }
             }
         }
 

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/ArtistPresenter.kt

@@ -14,14 +14,15 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result.Error
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.model.Artist
 import code.name.monkey.retromusic.mvp.BaseView
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 
@@ -49,10 +50,8 @@ interface ArtistsPresenter : Presenter<ArtistsView> {
 
         override fun loadArtists() {
             launch {
-                when (val result = repository.allArtists()) {
+                val result = repository.allArtists()
-                    is Success -> withContext(Dispatchers.Main) { view?.artists(result.data) }
+                view?.artists(result)
-                    is Error -> withContext(Dispatchers.Main) { view?.showEmptyView() }
-                }
             }
         }
     }

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/GenreDetailsPresenter.kt

@@ -14,14 +14,15 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result.Error
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.model.Song
 import code.name.monkey.retromusic.mvp.BaseView
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 
@@ -53,10 +54,8 @@ interface GenreDetailsPresenter : Presenter<GenreDetailsView> {
 
         override fun loadGenreSongs(genreId: Int) {
             launch {
-                when (val result = repository.getGenre(genreId)) {
+                val result = repository.getGenre(genreId)
-                    is Success -> withContext(Dispatchers.Main) { view?.songs(result.data) }
+                view?.songs(result)
-                    is Error -> withContext(Dispatchers.Main) { view?.showEmptyView() }
-                }
             }
         }
     }

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/GenrePresenter.kt

@@ -14,14 +14,15 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result.Error
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.model.Genre
 import code.name.monkey.retromusic.mvp.BaseView
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 
@@ -52,10 +53,8 @@ interface GenresPresenter : Presenter<GenresView> {
 
         override fun loadGenres() {
             launch {
-                when (val result = repository.allGenres()) {
+                val result = repository.allGenres()
-                    is Success -> withContext(Dispatchers.Main) { view?.genres(result.data) }
+                view?.genres(result)
-                    is Error -> withContext(Dispatchers.Main) { view?.showEmptyView() }
-                }
             }
         }
     }

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/HomePresenter.kt

@@ -14,7 +14,6 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result
 import code.name.monkey.retromusic.model.Home
 import code.name.monkey.retromusic.mvp.BaseView
 import code.name.monkey.retromusic.mvp.Presenter
@@ -56,9 +55,7 @@ interface HomePresenter : Presenter<HomeView> {
                     repository.favoritePlaylist()
                 )
                 for (r in recentArtistResult) {
-                    when (r) {
+                    r?.let { list.add(it) }
-                        is Result.Success -> list.add(r.data)
-                    }
                 }
                 withContext(Dispatchers.Main) {
                     if (list.isNotEmpty()) view?.sections(list) else view?.showEmptyView()

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/PlaylistPresenter.kt

@@ -14,13 +14,15 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result
 import code.name.monkey.retromusic.model.Playlist
 import code.name.monkey.retromusic.mvp.BaseView
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 
@@ -53,10 +55,8 @@ interface PlaylistsPresenter : Presenter<PlaylistView> {
 
         override fun playlists() {
             launch {
-                when (val result = repository.allPlaylists()) {
+                val result = repository.allPlaylists()
-                    is Result.Success -> withContext(Dispatchers.Main) { view?.playlists(result.data) }
+                view?.playlists(result)
-                    is Result.Error -> withContext(Dispatchers.Main) { view?.showEmptyView() }
-                }
             }
         }
     }

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/PlaylistSongsPresenter.kt

@@ -14,15 +14,16 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result.Error
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.model.Playlist
 import code.name.monkey.retromusic.model.Song
 import code.name.monkey.retromusic.mvp.BaseView
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 
@@ -48,10 +49,8 @@ interface PlaylistSongsPresenter : Presenter<PlaylistSongsView> {
 
         override fun loadPlaylistSongs(playlist: Playlist) {
             launch {
-                when (val songs = repository.getPlaylistSongs(playlist)) {
+                val songs = repository.getPlaylistSongs(playlist)
-                    is Success -> withContext(Dispatchers.Main) { view?.songs(songs.data) }
+                view?.songs(songs)
-                    is Error -> withContext(Dispatchers.Main) { view?.showEmptyView() }
-                }
             }
         }
 

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/SearchPresenter.kt

@@ -14,13 +14,14 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result.Error
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.mvp.BaseView
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 
@@ -53,10 +54,8 @@ interface SearchPresenter : Presenter<SearchView> {
 
         override fun search(query: String?) {
             launch {
-                when (val result = repository.search(query)) {
+                val result = repository.search(query)
-                    is Success -> withContext(Dispatchers.Main) { view?.showData(result.data) }
+                view?.showData(result)
-                    is Error -> withContext(Dispatchers.Main) { view?.showEmptyView() }
-                }
             }
         }
     }

app/src/main/java/code/name/monkey/retromusic/mvp/presenter/SongPresenter.kt

@@ -14,12 +14,14 @@
 
 package code.name.monkey.retromusic.mvp.presenter
 
-import code.name.monkey.retromusic.Result
 import code.name.monkey.retromusic.model.Song
 import code.name.monkey.retromusic.mvp.Presenter
 import code.name.monkey.retromusic.mvp.PresenterImpl
 import code.name.monkey.retromusic.providers.interfaces.Repository
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 
@@ -48,10 +50,8 @@ interface SongPresenter : Presenter<SongView> {
 
         override fun loadSongs() {
             launch {
-                when (val songs = repository.allSongs()) {
+                val songs = repository.allSongs()
-                    is Result.Success -> withContext(Dispatchers.Main) { view?.songs(songs.data) }
+                view?.songs(songs)
-                    is Result.Error -> withContext(Dispatchers.Main) { view?.showEmptyView() }
-                }
             }
         }
 

app/src/main/java/code/name/monkey/retromusic/providers/RepositoryImpl.kt

@@ -16,9 +16,6 @@ package code.name.monkey.retromusic.providers
 
 import android.content.Context
 import code.name.monkey.retromusic.R
-import code.name.monkey.retromusic.Result
-import code.name.monkey.retromusic.Result.Error
-import code.name.monkey.retromusic.Result.Success
 import code.name.monkey.retromusic.adapter.HomeAdapter
 import code.name.monkey.retromusic.loaders.*
 import code.name.monkey.retromusic.model.*
@@ -26,268 +23,114 @@ import code.name.monkey.retromusic.providers.interfaces.Repository
 import code.name.monkey.retromusic.rest.LastFmClient
 import code.name.monkey.retromusic.rest.model.LastFmAlbum
 import code.name.monkey.retromusic.rest.model.LastFmArtist
-import java.io.IOException
 import javax.inject.Inject
 
 class RepositoryImpl @Inject constructor(private val context: Context) : Repository {
 
-    override suspend fun allAlbums(): Result<ArrayList<Album>> {
+    override suspend fun allAlbums(): List<Album> = AlbumLoader.getAllAlbums(context)
-        return try {
+
-            val albums = AlbumLoader.getAllAlbums(context)
+    override suspend fun allArtists(): List<Artist> = ArtistLoader.getAllArtists(context)
-            if (albums.isNotEmpty()) {
+
-                Success(albums)
+    override suspend fun allPlaylists(): List<Playlist> = PlaylistLoader.getAllPlaylists(context)
-            } else {
+
-                Error(Throwable("No items found"))
+    override suspend fun allGenres(): List<Genre> = GenreLoader.getAllGenres(context)
-            }
+
-        } catch (e: Exception) {
+    override suspend fun allSongs(): List<Song> = SongLoader.getAllSongs(context)
-            Error(e)
+
+    override suspend fun albumById(albumId: Int): Album = AlbumLoader.getAlbum(context, albumId)
+
+    override suspend fun artistById(artistId: Int): Artist =
+        ArtistLoader.getArtist(context, artistId)
+
+    override suspend fun search(query: String?): MutableList<Any> =
+        SearchLoader.searchAll(context, query)
+
+    override suspend fun getPlaylistSongs(playlist: Playlist): ArrayList<Song> {
+        return if (playlist is AbsCustomPlaylist) {
+            playlist.getSongs(context)
+        } else {
+            PlaylistSongsLoader.getPlaylistSongList(context, playlist.id)
         }
     }
 
-    override suspend fun albumById(albumId: Int): Result<Album> {
+    override suspend fun getGenre(genreId: Int): ArrayList<Song> =
-        return try {
+        GenreLoader.getSongs(context, genreId)
-            val album = AlbumLoader.getAlbum(context, albumId)
+
-            if (album != null) {
+    override suspend fun recentArtists(): Home? {
-                Success(album)
+        val artists = LastAddedSongsLoader.getLastAddedArtists(context)
-            } else {
+        return if (artists.isNotEmpty()) Home(
-                Error(Throwable("No album"))
+            0,
-            }
+            R.string.recent_artists,
-        } catch (e: Exception) {
+            artists,
-            Error(e)
+            HomeAdapter.RECENT_ARTISTS,
-        }
+            R.drawable.ic_artist_white_24dp
+        ) else null
     }
 
-    override suspend fun allArtists(): Result<ArrayList<Artist>> {
+    override suspend fun recentAlbums(): Home? {
-        return try {
+        val albums = LastAddedSongsLoader.getLastAddedAlbums(context)
-            val artists = ArtistLoader.getAllArtists(context)
+        return if (albums.isNotEmpty()) {
-            if (artists.isNotEmpty()) {
+            Home(
-                Success(artists)
+                1,
-            } else {
+                R.string.recent_albums,
-                Error(Throwable("No items found"))
+                albums,
-            }
+                HomeAdapter.RECENT_ALBUMS,
-        } catch (e: Exception) {
+                R.drawable.ic_album_white_24dp
-            Error(e)
+            )
-        }
+        } else null
     }
 
-    override suspend fun allPlaylists(): Result<ArrayList<Playlist>> {
+    override suspend fun topAlbums(): Home? {
-        return try {
+        val albums = TopAndRecentlyPlayedTracksLoader.getTopAlbums(context)
-            val playlists = PlaylistLoader.getAllPlaylists(context)
+        return if (albums.isNotEmpty()) {
-            if (playlists.isNotEmpty()) {
+            Home(
-                Success(playlists)
+                3,
-            } else {
+                R.string.top_albums,
-                Error(Throwable("No items found"))
+                albums,
-            }
+                HomeAdapter.TOP_ALBUMS,
-        } catch (e: Exception) {
+                R.drawable.ic_album_white_24dp
-            Error(e)
+            )
-        }
+        } else null
     }
 
-    override suspend fun allGenres(): Result<ArrayList<Genre>> {
+    override suspend fun topArtists(): Home? {
-        return try {
+
-            val genres = GenreLoader.getAllGenres(context)
+        val artists = TopAndRecentlyPlayedTracksLoader.getTopArtists(context)
-            if (genres.isNotEmpty()) {
+        return if (artists.isNotEmpty()) {
-                Success(genres)
+            Home(
-            } else {
+                2,
-                Error(Throwable("No items found"))
+                R.string.top_artists,
-            }
+                artists,
-        } catch (e: Exception) {
+                HomeAdapter.TOP_ARTISTS,
-            Error(e)
+                R.drawable.ic_artist_white_24dp
-        }
+            )
+        } else null
+
     }
 
-    override suspend fun search(query: String?): Result<MutableList<Any>> {
+    override suspend fun favoritePlaylist(): Home? {
-        return try {
+        val playlists = PlaylistLoader.getFavoritePlaylist(context)
-            val result = SearchLoader.searchAll(context, query)
+        return if (playlists.isNotEmpty()) {
-            if (result.isNotEmpty()) {
+            Home(
-                Success(result)
+                4,
-            } else {
+                R.string.favorites,
-                Error(Throwable("No items found"))
+                playlists,
-            }
+                HomeAdapter.PLAYLISTS,
-        } catch (e: Exception) {
+                R.drawable.ic_favorite_white_24dp
-            Error(e)
+            )
-        }
+        } else null
-    }
-
-    override suspend fun allSongs(): Result<ArrayList<Song>> {
-        return try {
-            val songs = SongLoader.getAllSongs(context)
-            if (songs.isEmpty()) {
-                Error(Throwable("No items found"))
-            } else {
-                Success(songs)
-            }
-        } catch (e: Exception) {
-            Error(e)
-        }
-    }
-
-    override suspend fun getPlaylistSongs(playlist: Playlist): Result<ArrayList<Song>> {
-        return try {
-            val songs: ArrayList<Song> = if (playlist is AbsCustomPlaylist) {
-                playlist.getSongs(context)
-            } else {
-                PlaylistSongsLoader.getPlaylistSongList(context, playlist.id)
-            }
-            Success(songs)
-        } catch (e: Exception) {
-            Error(e)
-        }
-    }
-
-    override suspend fun getGenre(genreId: Int): Result<ArrayList<Song>> {
-        return try {
-            val songs = GenreLoader.getSongs(context, genreId)
-            if (songs.isEmpty()) {
-                Error(Throwable("No items found"))
-            } else {
-                Success(songs)
-            }
-        } catch (e: Exception) {
-            Error(e)
-        }
-    }
-
-    override suspend fun recentArtists(): Result<Home> {
-        return try {
-            val artists = LastAddedSongsLoader.getLastAddedArtists(context)
-            if (artists.isEmpty()) {
-                Error(Throwable("No items found"))
-            } else {
-                Success(
-                    Home(
-                        0,
-                        R.string.recent_artists,
-                        artists,
-                        HomeAdapter.RECENT_ARTISTS,
-                        R.drawable.ic_artist_white_24dp
-                    )
-                )
-            }
-        } catch (e: Exception) {
-            Error(e)
-        }
-    }
-
-    override suspend fun recentAlbums(): Result<Home> {
-        return try {
-            val albums = LastAddedSongsLoader.getLastAddedAlbums(context)
-            if (albums.isEmpty()) {
-                Error(Throwable("No items found"))
-            } else {
-                Success(
-                    Home(
-                        1,
-                        R.string.recent_albums,
-                        albums,
-                        HomeAdapter.RECENT_ALBUMS,
-                        R.drawable.ic_album_white_24dp
-                    )
-                )
-            }
-        } catch (e: Exception) {
-            Error(e)
-        }
-    }
-
-    override suspend fun topAlbums(): Result<Home> {
-        return try {
-            val albums = TopAndRecentlyPlayedTracksLoader.getTopAlbums(context)
-            if (albums.isEmpty()) {
-                Error(Throwable("No items found"))
-            } else {
-                Success(
-                    Home(
-                        3,
-                        R.string.top_albums,
-                        albums,
-                        HomeAdapter.TOP_ALBUMS,
-                        R.drawable.ic_album_white_24dp
-                    )
-                )
-            }
-        } catch (e: Exception) {
-            Error(e)
-        }
-    }
-
-    override suspend fun topArtists(): Result<Home> {
-        return try {
-            val artists = TopAndRecentlyPlayedTracksLoader.getTopArtists(context)
-            if (artists.isEmpty()) {
-                Error(Throwable("No items found"))
-            } else {
-                Success(
-                    Home(
-                        2,
-                        R.string.top_artists,
-                        artists,
-                        HomeAdapter.TOP_ARTISTS,
-                        R.drawable.ic_artist_white_24dp
-                    )
-                )
-            }
-        } catch (e: Exception) {
-            Error(e)
-        }
-    }
-
-    override suspend fun favoritePlaylist(): Result<Home> {
-        return try {
-            val playlists = PlaylistLoader.getFavoritePlaylist(context)
-            if (playlists.isEmpty()) {
-                Error(Throwable("No items found"))
-            } else {
-                Success(
-                    Home(
-                        4,
-                        R.string.favorites,
-                        playlists,
-                        HomeAdapter.PLAYLISTS,
-                        R.drawable.ic_favorite_white_24dp
-                    )
-                )
-            }
-        } catch (e: Exception) {
-            Error(e)
-        }
     }
 
     override suspend fun artistInfo(
         name: String,
         lang: String?,
         cache: String?
-    ): Result<LastFmArtist> = safeApiCall(
+    ): LastFmArtist = LastFmClient.getApiService().artistInfo(name, lang, cache)
-        call = {
-            Success(LastFmClient.getApiService().artistInfo(name, lang, cache))
-        },
-        errorMessage = "Error"
 
-    )
 
     override suspend fun albumInfo(
         artist: String,
         album: String
-    ): Result<LastFmAlbum> = safeApiCall(
+    ): LastFmAlbum = LastFmClient.getApiService().albumInfo(artist, album)
-        call = {
-            Success(LastFmClient.getApiService().albumInfo(artist, album))
-        },
-        errorMessage = "Error"
-    )
 
-    override suspend fun artistById(artistId: Int): Result<Artist> {
-        return try {
-            val artist = ArtistLoader.getArtist(context, artistId)
-            return Success(artist)
-        } catch (e: Exception) {
-            Error(Throwable("Error loading artist"))
-        }
-    }
 }
-
-suspend fun <T : Any> safeApiCall(call: suspend () -> Result<T>, errorMessage: String): Result<T> =
-    try {
-        call.invoke()
-    } catch (e: Exception) {
-        Error(IOException(errorMessage, e))
-    }

app/src/main/java/code/name/monkey/retromusic/providers/interfaces/Repository.kt

@@ -14,7 +14,6 @@
 
 package code.name.monkey.retromusic.providers.interfaces
 
-import code.name.monkey.retromusic.Result
 import code.name.monkey.retromusic.model.*
 import code.name.monkey.retromusic.rest.model.LastFmAlbum
 import code.name.monkey.retromusic.rest.model.LastFmArtist
@@ -25,37 +24,37 @@ import code.name.monkey.retromusic.rest.model.LastFmArtist
 
 interface Repository {
 
-    suspend fun allAlbums(): Result<ArrayList<Album>>
+    suspend fun allAlbums(): List<Album>
 
-    suspend fun albumById(albumId: Int): Result<Album>
+    suspend fun albumById(albumId: Int): Album
 
-    suspend fun allSongs(): Result<ArrayList<Song>>
+    suspend fun allSongs(): List<Song>
 
-    suspend fun allArtists(): Result<ArrayList<Artist>>
+    suspend fun allArtists(): List<Artist>
 
-    suspend fun allPlaylists(): Result<ArrayList<Playlist>>
+    suspend fun allPlaylists(): List<Playlist>
 
-    suspend fun allGenres(): Result<ArrayList<Genre>>
+    suspend fun allGenres(): List<Genre>
 
-    suspend fun search(query: String?): Result<MutableList<Any>>
+    suspend fun search(query: String?): MutableList<Any>
 
-    suspend fun getPlaylistSongs(playlist: Playlist): Result<ArrayList<Song>>
+    suspend fun getPlaylistSongs(playlist: Playlist): ArrayList<Song>
 
-    suspend fun getGenre(genreId: Int): Result<ArrayList<Song>>
+    suspend fun getGenre(genreId: Int): ArrayList<Song>
 
-    suspend fun recentArtists(): Result<Home>
+    suspend fun recentArtists(): Home?
 
-    suspend fun topArtists(): Result<Home>
+    suspend fun topArtists(): Home?
 
-    suspend fun topAlbums(): Result<Home>
+    suspend fun topAlbums(): Home?
 
-    suspend fun recentAlbums(): Result<Home>
+    suspend fun recentAlbums(): Home?
 
-    suspend fun favoritePlaylist(): Result<Home>
+    suspend fun favoritePlaylist(): Home?
 
-    suspend fun artistInfo(name: String, lang: String?, cache: String?): Result<LastFmArtist>
+    suspend fun artistInfo(name: String, lang: String?, cache: String?): LastFmArtist
 
-    suspend fun albumInfo(artist: String, album: String): Result<LastFmAlbum>
+    suspend fun albumInfo(artist: String, album: String): LastFmAlbum
 
-    suspend fun artistById(artistId: Int): Result<Artist>
+    suspend fun artistById(artistId: Int): Artist
 }

app/src/main/java/code/name/monkey/retromusic/util/NavigationUtil.java

@@ -29,7 +29,7 @@ import org.jetbrains.annotations.NotNull;
 
 import code.name.monkey.retromusic.R;
 import code.name.monkey.retromusic.activities.AboutActivity;
-import code.name.monkey.retromusic.activities.AlbumDetailsActivity;
+import code.name.monkey.retromusic.activities.albums.AlbumDetailsActivity;
 import code.name.monkey.retromusic.activities.ArtistDetailActivity;
 import code.name.monkey.retromusic.activities.DriveModeActivity;
 import code.name.monkey.retromusic.activities.GenreDetailsActivity;