feat: enhance audio playback controls with repeat mode functionality

Author: gokadzev

lib/screens/now_playing_page.dart

@@ -362,14 +362,21 @@ class NowPlayingPage extends StatelessWidget {
                 },
               ),
               const SizedBox(width: 10),
-              IconButton(
-                icon: Icon(
-                  FluentIcons.next_24_filled,
-                  color: audioHandler.hasNext ? _primaryColor : _secondaryColor,
-                ),
-                iconSize: screen * 0.115,
-                onPressed: () => audioHandler.skipToNext(),
-                splashColor: Colors.transparent,
+              ValueListenableBuilder<AudioServiceRepeatMode>(
+                valueListenable: repeatNotifier,
+                builder: (_, repeatMode, __) {
+                  return IconButton(
+                    icon: Icon(
+                      FluentIcons.next_24_filled,
+                      color: audioHandler.hasNext
+                          ? _primaryColor
+                          : _secondaryColor,
+                    ),
+                    iconSize: screen * 0.115,
+                    onPressed: () => audioHandler.skipToNext(),
+                    splashColor: Colors.transparent,
+                  );
+                },
               ),
             ],
           ),
@@ -390,6 +397,8 @@ class NowPlayingPage extends StatelessWidget {
                             repeatMode == AudioServiceRepeatMode.all
                                 ? AudioServiceRepeatMode.one
                                 : AudioServiceRepeatMode.none;
+
+                        audioHandler.setRepeatMode(repeatMode);
                       },
                     )
                   : IconButton.filledTonal(

lib/services/audio_service.dart

@@ -332,7 +332,9 @@ class MusifyAudioHandler extends BaseAudioHandler {
   Future<void> skipToNext() async {
     if (repeatNotifier.value == AudioServiceRepeatMode.one) {
       // If repeat mode is set to repeat the current song, play the current song again
-      await skipToSong(activeSongId);
+      if (audioPlayer.playing) {
+        await audioPlayer.seek(Duration.zero);
+      }
     } else if (!hasNext && repeatNotifier.value == AudioServiceRepeatMode.all) {
       // If repeat mode is set to repeat the playlist, start from the beginning
       await skipToSong(0);
@@ -344,15 +346,24 @@ class MusifyAudioHandler extends BaseAudioHandler {
     } else if (hasNext) {
       // If there is a next song, skip to the next song
       await skipToSong(activeSongId + 1);
-    } else {
-      // Handle end of playlist without repeat
-      await audioPlayer.stop();
     }
   }
 
   @override
   Future<void> skipToPrevious() async {
-    await skipToSong(activeSongId - 1);
+    if (repeatNotifier.value == AudioServiceRepeatMode.one) {
+      // If repeat mode is set to repeat the current song, play the current song again
+      if (audioPlayer.playing) {
+        await audioPlayer.seek(Duration.zero);
+      }
+    } else if (!hasPrevious &&
+        repeatNotifier.value == AudioServiceRepeatMode.all) {
+      // If repeat mode is set to repeat the playlist, start from the end
+      await skipToSong(activePlaylist['list'].length - 1);
+    } else if (hasPrevious) {
+      // If there is a previous song, skip to the previous song
+      await skipToSong(activeSongId - 1);
+    }
   }
 
   @override
@@ -362,6 +373,13 @@ class MusifyAudioHandler extends BaseAudioHandler {
     await audioPlayer.setShuffleModeEnabled(shuffleEnabled);
   }
 
+  @override
+  Future<void> setRepeatMode(AudioServiceRepeatMode repeatMode) async {
+    await audioPlayer.setLoopMode(
+      repeatMode == AudioServiceRepeatMode.all ? LoopMode.one : LoopMode.off,
+    );
+  }
+
   void changeSponsorBlockStatus() {
     sponsorBlockSupport.value = !sponsorBlockSupport.value;
     addOrUpdateData(