fix: last track of queue never plays & repeat playlist never works

lib/provider/proxy_playlist/next_fetcher_mixin.dart

@@ -98,10 +98,10 @@ mixin NextFetcher on StateNotifier<ProxyPlaylist> {
     return sources
         .map((source) {
           final track = state.tracks.firstWhereOrNull(
-            (track) {
-              final newSource = makeAppropriateSource(track);
-              return newSource == source;
-            },
+            (track) =>
+                trackToUnplayableSource(track) == source ||
+                (track is SpotubeTrack && track.ytUri == source) ||
+                (track is LocalTrack && track.path == source),
           );
           return track;
         })

lib/provider/proxy_playlist/proxy_playlist_provider.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:convert';
+import 'dart:math';
 
 import 'package:catcher/catcher.dart';
 import 'package:collection/collection.dart';
@@ -129,6 +130,7 @@ class ProxyPlaylistNotifier extends PersistedStateNotifier<ProxyPlaylist>
 
           final oldTrack =
               mapSourcesToTracks([audioPlayer.nextSource!]).firstOrNull;
+
           final track = await ensureSourcePlayable(audioPlayer.nextSource!);
 
           if (track != null) {
@@ -439,13 +441,16 @@ class ProxyPlaylistNotifier extends PersistedStateNotifier<ProxyPlaylist>
   Future<void> next() async {
     if (audioPlayer.nextSource == null) return;
     final oldTrack = mapSourcesToTracks([audioPlayer.nextSource!]).firstOrNull;
+
     state = state.copyWith(
       active: state.tracks
           .toList()
           .indexWhere((element) => element.id == oldTrack?.id),
     );
+
     await audioPlayer.pause();
     final track = await ensureSourcePlayable(audioPlayer.nextSource!);
+
     if (track != null) {
       state = state.copyWith(
         tracks: mergeTracks([track], state.tracks),
@@ -613,7 +618,7 @@ class ProxyPlaylistNotifier extends PersistedStateNotifier<ProxyPlaylist>
     final oldCollections = state.collections;
     await load(
       state.tracks,
-      initialIndex: state.active ?? 0,
+      initialIndex: max(state.active ?? 0, 0),
       autoPlay: false,
     );
     state = state.copyWith(collections: oldCollections);

lib/services/audio_player/audio_player.dart

@@ -111,7 +111,7 @@ abstract class AudioPlayerInterface {
     // }
   }
 
-  Future<PlaybackLoopMode> get loopMode async {
+  PlaybackLoopMode get loopMode {
     return PlaybackLoopMode.fromPlaylistMode(_mkPlayer.loopMode);
     // if (mkSupportedPlatform) {
     //   return PlaybackLoopMode.fromPlaylistMode(_mkPlayer.loopMode);

lib/services/audio_player/audio_player_impl.dart

@@ -156,6 +156,12 @@ class SpotubeAudioPlayer extends AudioPlayerInterface
 
   String? get nextSource {
     // if (mkSupportedPlatform) {
+
+    if (loopMode == PlaybackLoopMode.all &&
+        _mkPlayer.playlist.index == _mkPlayer.playlist.medias.length - 1) {
+      return sources.first;
+    }
+
     return _mkPlayer.playlist.medias
         .elementAtOrNull(_mkPlayer.playlist.index + 1)
         ?.uri;
@@ -169,6 +175,10 @@ class SpotubeAudioPlayer extends AudioPlayerInterface
   }
 
   String? get previousSource {
+    if (loopMode == PlaybackLoopMode.all && _mkPlayer.playlist.index == 0) {
+      return sources.last;
+    }
+
     // if (mkSupportedPlatform) {
     return _mkPlayer.playlist.medias
         .elementAtOrNull(_mkPlayer.playlist.index - 1)

lib/services/audio_player/mk_state_player.dart

@@ -170,6 +170,7 @@ class MkPlayerWithState extends Player {
       return super.open(_playlist!.medias[_playlist!.index], play: true);
     } else if (!isLast) {
       playlist = _playlist!.copyWith(index: _playlist!.index + 1);
+
       return super.open(_playlist!.medias[_playlist!.index], play: true);
     }
   }
@@ -233,30 +234,30 @@ class MkPlayerWithState extends Player {
 
     final isOldUrlPlaying = _playlist!.medias[_playlist!.index].uri == oldUrl;
 
-    for (var i = 0; i < _playlist!.medias.length - 1; i++) {
-      final media = _playlist!.medias[i];
-      if (media.uri == oldUrl) {
-        if (isOldUrlPlaying) {
-          pause();
-        }
-        final newMedias = _playlist!.medias.toList();
-        newMedias[i] = Media(newUrl, extras: media.extras);
-        playlist = _playlist!.copyWith(medias: newMedias);
-        if (isOldUrlPlaying) {
-          super.open(
-            newMedias[i],
-            play: true,
-          );
-        }
-
-        // replace in the _tempMedias if it's not null
-        if (shuffled && _tempMedias != null) {
-          final tempIndex = _tempMedias!.indexOf(media);
-          _tempMedias![tempIndex] = Media(newUrl, extras: media.extras);
-        }
-        break;
+    // ends the loop where match is found
+    // tends to be a bit more efficient than forEach
+    _playlist!.medias.firstWhereIndexedOrNull((i, media) {
+      if (media.uri != oldUrl) return false;
+      if (isOldUrlPlaying) {
+        pause();
       }
-    }
+      final copyMedias = [..._playlist!.medias];
+      copyMedias[i] = Media(newUrl, extras: media.extras);
+      playlist = _playlist!.copyWith(medias: copyMedias);
+      if (isOldUrlPlaying) {
+        super.open(
+          copyMedias[i],
+          play: true,
+        );
+      }
+
+      // replace in the _tempMedias if it's not null
+      if (shuffled && _tempMedias != null) {
+        final tempIndex = _tempMedias!.indexOf(media);
+        _tempMedias![tempIndex] = Media(newUrl, extras: media.extras);
+      }
+      return true;
+    });
   }
 
   @override