Make Notification show currently played model

Make the playback notification show the currently played music model [e.g the genre/artist/album thats being played].

app/build.gradle

@@ -10,7 +10,7 @@ android {
 
     defaultConfig {
         applicationId "org.oxycblt.auxio"
-        minSdkVersion 24
+        minSdkVersion 21
         targetSdkVersion 30
         versionCode 1
         versionName "1.0"
@@ -56,7 +56,7 @@ dependencies {
     implementation 'androidx.fragment:fragment-ktx:1.3.0-beta01'
 
     // Layout
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.2'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
 
     // Lifecycle
     implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"

app/src/main/java/org/oxycblt/auxio/MainActivity.kt

@@ -5,14 +5,22 @@ import android.content.Intent
 import android.util.AttributeSet
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatDelegate
 import org.oxycblt.auxio.playback.PlaybackService
 import org.oxycblt.auxio.theme.accent
 
 // FIXME: Fix bug where fast navigation will break the animations and
 //  lead to nothing being displayed [Possibly Un-fixable]
+// TODO: Test for compatibility
+//  API 30    - No Issues
+//  API 29    - No Issues [Primary Testing Version]
+//  API 28-23 - Not tested yet
+//  API 22    - ProgressBar/SeekBar look wonky, RecyclerView dividers don't show
+//  API 21    - Not tested yet
 class MainActivity : AppCompatActivity(R.layout.activity_main) {
 
     override fun onCreateView(name: String, context: Context, attrs: AttributeSet): View? {
+        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)
         // Apply the theme
         setTheme(accent.second)
 

app/src/main/java/org/oxycblt/auxio/playback/NotificationUtils.kt

@@ -15,6 +15,7 @@ import org.oxycblt.auxio.R
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.music.coil.getBitmap
 import org.oxycblt.auxio.playback.state.LoopMode
+import org.oxycblt.auxio.playback.state.PlaybackMode
 import org.oxycblt.auxio.playback.state.PlaybackStateManager
 
 object NotificationUtils {
@@ -52,8 +53,7 @@ fun NotificationManager.createMediaNotification(
     )
 
     // TODO: Things that probably aren't possible but would be nice
-    //  - Swipe to close instead of a button to press
-    //  - Playing intent takes you to now playing screen instead of elsewhere
+    //  - Playing intent takes you to PlaybackFragment instead of MainFragment
     return NotificationCompat.Builder(context, NotificationUtils.CHANNEL_ID)
         .setSmallIcon(R.drawable.ic_song)
         .setStyle(
@@ -64,12 +64,12 @@ fun NotificationManager.createMediaNotification(
         .setCategory(NotificationCompat.CATEGORY_SERVICE)
         .setChannelId(NotificationUtils.CHANNEL_ID)
         .setShowWhen(false)
-        .setTicker(context.getString(R.string.title_playback))
         .addAction(newAction(NotificationUtils.ACTION_LOOP, context))
         .addAction(newAction(NotificationUtils.ACTION_SKIP_PREV, context))
         .addAction(newAction(NotificationUtils.ACTION_PLAY_PAUSE, context))
         .addAction(newAction(NotificationUtils.ACTION_SKIP_NEXT, context))
         .addAction(newAction(NotificationUtils.ACTION_EXIT, context))
+        .setNotificationSilent()
         .setSubText(context.getString(R.string.title_playback))
         .setContentIntent(mainIntent)
         .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
@@ -91,8 +91,6 @@ fun NotificationCompat.Builder.setMetadata(song: Song, context: Context, onDone:
 @SuppressLint("RestrictedApi")
 fun NotificationCompat.Builder.updatePlaying(context: Context) {
     mActions[2] = newAction(NotificationUtils.ACTION_PLAY_PAUSE, context)
-
-    setOngoing(PlaybackStateManager.getInstance().isPlaying)
 }
 
 @SuppressLint("RestrictedApi")
@@ -100,6 +98,18 @@ fun NotificationCompat.Builder.updateLoop(context: Context) {
     mActions[0] = newAction(NotificationUtils.ACTION_LOOP, context)
 }
 
+@SuppressLint("RestrictedApi")
+fun NotificationCompat.Builder.updateMode(context: Context) {
+    val playbackManager = PlaybackStateManager.getInstance()
+
+    // If the mode is ALL_SONGS, then just put a string, otherwise put the parent model's name.
+    if (playbackManager.mode == PlaybackMode.ALL_SONGS) {
+        setSubText(context.getString(R.string.title_all_songs))
+    } else {
+        setSubText(playbackManager.parent!!.name)
+    }
+}
+
 private fun newAction(action: String, context: Context): NotificationCompat.Action {
     val playbackManager = PlaybackStateManager.getInstance()
 

app/src/main/java/org/oxycblt/auxio/playback/PlaybackService.kt

@@ -38,6 +38,7 @@ import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.music.coil.getBitmap
 import org.oxycblt.auxio.music.toURI
 import org.oxycblt.auxio.playback.state.LoopMode
+import org.oxycblt.auxio.playback.state.PlaybackMode
 import org.oxycblt.auxio.playback.state.PlaybackStateCallback
 import org.oxycblt.auxio.playback.state.PlaybackStateManager
 
@@ -57,7 +58,6 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
 
     private var changeIsFromAudioFocus = true
     private var isForeground = false
-    private var isDetachedFromUI = false
 
     private val serviceJob = Job()
     private val serviceScope = CoroutineScope(
@@ -220,6 +220,12 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
         stopForegroundAndNotification()
     }
 
+    override fun onModeUpdate(mode: PlaybackMode) {
+        notification.updateMode(this)
+
+        startForegroundOrNotify()
+    }
+
     override fun onPlayingUpdate(isPlaying: Boolean) {
         changeIsFromAudioFocus = false
 

app/src/main/java/org/oxycblt/auxio/playback/state/PlaybackStateCallback.kt

@@ -6,6 +6,7 @@ interface PlaybackStateCallback {
     fun onSongUpdate(song: Song?) {}
     fun onPositionUpdate(position: Long) {}
     fun onQueueUpdate(queue: MutableList<Song>) {}
+    fun onModeUpdate(mode: PlaybackMode) {}
     fun onIndexUpdate(index: Int) {}
     fun onPlayingUpdate(isPlaying: Boolean) {}
     fun onShuffleUpdate(isShuffling: Boolean) {}

app/src/main/java/org/oxycblt/auxio/playback/state/PlaybackStateManager.kt

@@ -11,7 +11,7 @@ import org.oxycblt.auxio.music.Song
 import kotlin.random.Random
 
 // The manager of the current playback state [Current Song, Queue, Shuffling]
-// This class is for sole use by the classes in /playback/.
+// This class is for sole use by the code in /playback/.
 // If you want to add system-side things, add to PlaybackService.
 // If you want to add ui-side things, add to PlaybackViewModel.
 // [Yes, I know MediaSessionCompat exists, but I like having full control over the
@@ -42,6 +42,10 @@ class PlaybackStateManager private constructor() {
             callbacks.forEach { it.onIndexUpdate(value) }
         }
     private var mMode = PlaybackMode.ALL_SONGS
+        set(value) {
+            field = value
+            callbacks.forEach { it.onModeUpdate(value) }
+        }
 
     private var mIsPlaying = false
         set(value) {
@@ -62,9 +66,11 @@ class PlaybackStateManager private constructor() {
         }
 
     val song: Song? get() = mSong
+    val parent: BaseModel? get() = mParent
     val position: Long get() = mPosition
     val queue: MutableList<Song> get() = mQueue
     val index: Int get() = mIndex
+    val mode: PlaybackMode get() = mMode
     val isPlaying: Boolean get() = mIsPlaying
     val isShuffling: Boolean get() = mIsShuffling
     val loopMode: LoopMode get() = mLoopMode
@@ -136,6 +142,10 @@ class PlaybackStateManager private constructor() {
 
         Log.d(this::class.simpleName, "Playing ${baseModel.name}")
 
+        mParent = baseModel
+        mIndex = 0
+        mIsShuffling = shuffled
+
         when (baseModel) {
             is Album -> {
                 mQueue = orderSongsInAlbum(baseModel)
@@ -157,10 +167,6 @@ class PlaybackStateManager private constructor() {
 
         updatePlayback(mQueue[0])
 
-        mIndex = 0
-        mParent = baseModel
-        mIsShuffling = shuffled
-
         if (mIsShuffling) {
             genShuffle(false)
         } else {
@@ -178,8 +184,7 @@ class PlaybackStateManager private constructor() {
     }
 
     fun setPosition(position: Long) {
-        // Due to the hacky way I poll ExoPlayer positions, don't accept any bugged positions
-        // that are over the duration of the song.
+        // Don't accept any bugged positions that are over the duration of the song.
         mSong?.let {
             if (position <= it.duration) {
                 mPosition = position