fix: disable play when loading track and buffering event

lib/components/player/player_controls.dart

@@ -45,6 +45,7 @@ class PlayerControls extends HookConsumerWidget {
     final playlistNotifier = ref.watch(PlaylistQueueNotifier.notifier);
     final playing = useStream(PlaylistQueueNotifier.playing).data ??
         PlaylistQueueNotifier.isPlaying;
+    final buffering = useStream(playlistNotifier.buffering).data ?? true;
     final theme = Theme.of(context);
 
     final isDominantColorDark = ThemeData.estimateBrightnessForColor(
@@ -140,7 +141,7 @@ class PlayerControls extends HookConsumerWidget {
                             // there's an edge case for value being bigger
                             // than total duration. Keeping it resolved
                             value: progress.value.toDouble(),
-                            onChanged: playlist?.isLoading == true
+                            onChanged: playlist?.isLoading == true || buffering
                                 ? null
                                 : (v) {
                                     progress.value = v;
@@ -188,7 +189,7 @@ class PlayerControls extends HookConsumerWidget {
                     style: playlist?.isShuffled == true
                         ? activeButtonStyle
                         : buttonStyle,
-                    onPressed: playlist == null
+                    onPressed: playlist == null || playlist.isLoading
                         ? null
                         : () {
                             if (playlist.isShuffled == true) {
@@ -221,7 +222,9 @@ class PlayerControls extends HookConsumerWidget {
                             playing ? SpotubeIcons.pause : SpotubeIcons.play,
                           ),
                     style: resumePauseStyle,
-                    onPressed: Actions.handler<PlayPauseIntent>(
+                    onPressed: playlist?.isLoading == true
+                        ? null
+                        : Actions.handler<PlayPauseIntent>(
                             context,
                             PlayPauseIntent(ref),
                           ),

lib/provider/playlist_queue_provider.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:audioplayers/audioplayers.dart';
 import 'package:flutter_cache_manager/flutter_cache_manager.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
@@ -138,6 +140,8 @@ class PlaylistQueueNotifier extends PersistedStateNotifier<PlaylistQueue?> {
 
   late AudioServices audioServices;
 
+  final StreamController<bool> _bufferingController;
+
   static final provider =
       StateNotifierProvider<PlaylistQueueNotifier, PlaylistQueue?>(
     (ref) => PlaylistQueueNotifier._(ref),
@@ -145,7 +149,9 @@ class PlaylistQueueNotifier extends PersistedStateNotifier<PlaylistQueue?> {
 
   static final notifier = provider.notifier;
 
-  PlaylistQueueNotifier._(this.ref) : super(null, "playlist") {
+  PlaylistQueueNotifier._(this.ref)
+      : _bufferingController = StreamController.broadcast(),
+        super(null, "playlist") {
     configure();
   }
 
@@ -166,6 +172,7 @@ class PlaylistQueueNotifier extends PersistedStateNotifier<PlaylistQueue?> {
 
     audioPlayer.onPositionChanged.listen((pos) async {
       if (!isLoaded) return;
+      _bufferingController.add(false);
       final currentDuration = await audioPlayer.getDuration() ?? Duration.zero;
 
       // skip all the activeTrack.skipSegments
@@ -178,7 +185,8 @@ class PlaylistQueueNotifier extends PersistedStateNotifier<PlaylistQueue?> {
             in (state!.activeTrack as SpotubeTrack).skipSegments) {
           if ((pos.inSeconds >= segment["start"]! &&
               pos.inSeconds < segment["end"]!)) {
-            await audioPlayer.seek(Duration(seconds: segment["end"]!));
+            await audioPlayer.pause();
+            await seek(Duration(seconds: segment["end"]!));
           }
         }
       }
@@ -199,6 +207,10 @@ class PlaylistQueueNotifier extends PersistedStateNotifier<PlaylistQueue?> {
         isPreSearching = false;
       }
     });
+
+    audioPlayer.onSeekComplete.listen((event) {
+      _bufferingController.add(false);
+    });
   }
 
   // properties
@@ -210,6 +222,18 @@ class PlaylistQueueNotifier extends PersistedStateNotifier<PlaylistQueue?> {
 
   bool get isLoaded => state != null;
 
+  Stream<bool> get buffering =>
+      _bufferingController.stream.asyncMap((bufferEvent) async {
+        final duration = await audioPlayer.getDuration();
+        final position = await audioPlayer.getCurrentPosition();
+        final isBuffering = state?.activeTrack is! SpotubeTrack &&
+            audioPlayer.state == PlayerState.playing &&
+            (bufferEvent || (duration == null && position == null));
+        return isBuffering;
+      });
+
+  Future<bool> get isBuffering => buffering.first;
+
   // redirectors
   static bool get isPlaying => audioPlayer.state == PlayerState.playing;
   static bool get isPaused => audioPlayer.state == PlayerState.paused;
@@ -336,6 +360,7 @@ class PlaylistQueueNotifier extends PersistedStateNotifier<PlaylistQueue?> {
 
   Future<void> play() async {
     if (!isLoaded) return;
+    _bufferingController.add(true);
     await pause();
     await audioServices.addTrack(state!.activeTrack);
     if (state!.activeTrack is LocalTrack) {
@@ -362,7 +387,7 @@ class PlaylistQueueNotifier extends PersistedStateNotifier<PlaylistQueue?> {
       );
     }
 
-    audioServices.addTrack(state!.activeTrack);
+    await audioServices.addTrack(state!.activeTrack);
 
     final cached =
         await DefaultCacheManager().getFileFromCache(state!.activeTrack.id!);
@@ -450,6 +475,7 @@ class PlaylistQueueNotifier extends PersistedStateNotifier<PlaylistQueue?> {
 
   Future<void> seek(Duration position) async {
     if (!isLoaded) return;
+    _bufferingController.add(true);
     await audioPlayer.seek(position);
     await resume();
   }