feat: youtube on a separate dart isolate

lib/modules/player/sibling_tracks_sheet.dart

@@ -18,6 +18,7 @@ import 'package:spotube/provider/audio_player/audio_player.dart';
 import 'package:spotube/provider/audio_player/querying_track_info.dart';
 import 'package:spotube/provider/server/active_sourced_track.dart';
 import 'package:spotube/provider/user_preferences/user_preferences_provider.dart';
+import 'package:spotube/services/isolates/yt_explode.dart';
 import 'package:spotube/services/sourced_track/models/source_info.dart';
 import 'package:spotube/services/sourced_track/models/video_info.dart';
 import 'package:spotube/services/sourced_track/sourced_track.dart';
@@ -114,7 +115,8 @@ class SiblingTracksSheet extends HookConsumerWidget {
             activeSourceInfo,
           );
       } else {
-        final resultsYt = await youtubeClient.search.search(searchTerm.trim());
+        final resultsYt =
+            await IsolatedYoutubeExplode.instance.search(searchTerm.trim());
 
         final searchResults = await Future.wait(
           resultsYt

lib/provider/user_preferences/user_preferences_provider.dart

@@ -11,6 +11,7 @@ import 'package:spotube/provider/audio_player/audio_player_streams.dart';
 import 'package:spotube/provider/database/database.dart';
 import 'package:spotube/provider/palette_provider.dart';
 import 'package:spotube/services/audio_player/audio_player.dart';
+import 'package:spotube/services/isolates/yt_explode.dart';
 import 'package:spotube/services/logger/logger.dart';
 import 'package:spotube/services/sourced_track/enums.dart';
 import 'package:spotube/utils/platform.dart';
@@ -40,6 +41,10 @@ class UserPreferencesNotifier extends Notifier<PreferencesTableData> {
             ..where((tbl) => tbl.id.equals(0)))
           .getSingle();
 
+      if (state.audioSource == AudioSource.youtube) {
+        await IsolatedYoutubeExplode.initialize();
+      }
+
       final subscription = (db.select(db.preferencesTable)
             ..where((tbl) => tbl.id.equals(0)))
           .watchSingle()
@@ -207,6 +212,10 @@ class UserPreferencesNotifier extends Notifier<PreferencesTableData> {
 
   void setAudioSource(AudioSource type) {
     setData(PreferencesTableCompanion(audioSource: Value(type)));
+
+    if (type != AudioSource.youtube && IsolatedYoutubeExplode.isInitialized) {
+      IsolatedYoutubeExplode.instance.dispose();
+    }
   }
 
   void setSystemTitleBar(bool isSystemTitleBar) {

lib/services/isolates/yt_explode.dart

@@ -0,0 +1,121 @@
+import 'dart:async';
+import 'dart:isolate';
+
+import 'package:youtube_explode_dart/youtube_explode_dart.dart';
+
+/// A Isolate wrapper for the YoutubeExplode class
+/// It contains methods that are computationally expensive
+class IsolatedYoutubeExplode {
+  final Isolate _isolate;
+  final SendPort _sendPort;
+  final ReceivePort _receivePort;
+
+  IsolatedYoutubeExplode._(
+    Isolate isolate,
+    ReceivePort receivePort,
+    SendPort sendPort,
+  )   : _isolate = isolate,
+        _receivePort = receivePort,
+        _sendPort = sendPort;
+
+  static IsolatedYoutubeExplode? _instance;
+
+  static IsolatedYoutubeExplode get instance => _instance!;
+
+  static bool get isInitialized => _instance != null;
+
+  static Future<void> initialize() async {
+    if (_instance != null) {
+      return;
+    }
+
+    final completer = Completer<SendPort>();
+
+    final receivePort = ReceivePort();
+
+    /// Listen for the main isolate to set the main port
+    final subscription = receivePort.listen((message) {
+      if (message is SendPort) {
+        completer.complete(message);
+      }
+    });
+
+    final isolate = await Isolate.spawn(_isolateEntry, receivePort.sendPort);
+
+    _instance = IsolatedYoutubeExplode._(
+      isolate,
+      receivePort,
+      await completer.future,
+    );
+
+    if (completer.isCompleted) {
+      subscription.cancel();
+    }
+  }
+
+  static void _isolateEntry(SendPort mainSendPort) {
+    final receivePort = ReceivePort();
+    final youtubeExplode = YoutubeExplode();
+
+    /// Send the main port to the main isolate
+    mainSendPort.send(receivePort.sendPort);
+
+    receivePort.listen((message) async {
+      final SendPort replyPort = message[0];
+      final String methodName = message[1];
+      final List<dynamic> arguments = message[2];
+
+      // Run the requested method on YoutubeExplode
+      var result = switch (methodName) {
+        "search" => youtubeExplode.search
+            .search(arguments[0] as String, filter: TypeFilters.video)
+            .then((s) => s.toList()),
+        "video" => youtubeExplode.videos.get(arguments[0] as String),
+        "manifest" => youtubeExplode.videos.streamsClient.getManifest(
+            arguments[0] as String,
+            requireWatchPage: false,
+            ytClients: [
+              YoutubeApiClient.mediaConnect,
+              YoutubeApiClient.ios,
+              YoutubeApiClient.android,
+              YoutubeApiClient.mweb,
+              YoutubeApiClient.tv,
+            ],
+          ),
+        _ => throw ArgumentError('Invalid method name: $methodName'),
+      };
+
+      replyPort.send(await result);
+    });
+  }
+
+  Future<T> _runMethod<T>(String methodName, List<dynamic> args) {
+    final completer = Completer<T>();
+    final responsePort = ReceivePort();
+
+    responsePort.listen((message) {
+      completer.complete(message as T);
+      responsePort.close();
+    });
+
+    _sendPort.send([responsePort.sendPort, methodName, args]);
+    return completer.future;
+  }
+
+  Future<List<Video>> search(String query) async {
+    return _runMethod<List<Video>>("search", [query]);
+  }
+
+  Future<Video> video(String videoId) async {
+    return _runMethod<Video>("video", [videoId]);
+  }
+
+  Future<StreamManifest> manifest(String videoId) async {
+    return _runMethod<StreamManifest>("manifest", [videoId]);
+  }
+
+  void dispose() {
+    _receivePort.close();
+    _isolate.kill(priority: Isolate.immediate);
+  }
+}

lib/services/sourced_track/sources/youtube.dart

@@ -1,10 +1,10 @@
 import 'package:collection/collection.dart';
 import 'package:drift/drift.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:http/http.dart';
 import 'package:spotify/spotify.dart';
 import 'package:spotube/models/database/database.dart';
 import 'package:spotube/provider/database/database.dart';
+import 'package:spotube/services/isolates/yt_explode.dart';
 import 'package:spotube/services/logger/logger.dart';
 import 'package:spotube/services/song_link/song_link.dart';
 import 'package:spotube/services/sourced_track/enums.dart';
@@ -16,7 +16,6 @@ import 'package:spotube/services/sourced_track/sourced_track.dart';
 import 'package:spotube/utils/service_utils.dart';
 import 'package:youtube_explode_dart/youtube_explode_dart.dart';
 
-final youtubeClient = YoutubeExplode();
 final officialMusicRegex = RegExp(
   r"official\s(video|audio|music\svideo|lyric\svideo|visualizer)",
   caseSensitive: false,
@@ -48,6 +47,9 @@ class YoutubeSourcedTrack extends SourcedTrack {
     required Track track,
     required Ref ref,
   }) async {
+    if (!IsolatedYoutubeExplode.isInitialized) {
+      await IsolatedYoutubeExplode.initialize();
+    }
     final database = ref.read(databaseProvider);
     final cachedSource = await (database.select(database.sourceMatchTable)
           ..where((s) => s.trackId.equals(track.id!))
@@ -81,18 +83,10 @@ class YoutubeSourcedTrack extends SourcedTrack {
         track: track,
       );
     }
-    final item = await youtubeClient.videos.get(cachedSource.sourceId);
-    final manifest = await youtubeClient.videos.streamsClient.getManifest(
-      cachedSource.sourceId,
-      requireWatchPage: false,
-      ytClients: [
-        YoutubeApiClient.mediaConnect,
-        YoutubeApiClient.ios,
-        YoutubeApiClient.android,
-        YoutubeApiClient.mweb,
-        YoutubeApiClient.tv,
-      ],
-    );
+    final item =
+        await IsolatedYoutubeExplode.instance.video(cachedSource.sourceId);
+    final manifest =
+        await IsolatedYoutubeExplode.instance.manifest(cachedSource.sourceId);
     return YoutubeSourcedTrack(
       ref: ref,
       siblings: [],
@@ -144,17 +138,7 @@ class YoutubeSourcedTrack extends SourcedTrack {
   ) async {
     SourceMap? sourceMap;
     if (index == 0) {
-      final manifest = await youtubeClient.videos.streamsClient.getManifest(
-        item.id,
-        requireWatchPage: false,
-        ytClients: [
-          YoutubeApiClient.mediaConnect,
-          YoutubeApiClient.ios,
-          YoutubeApiClient.android,
-          YoutubeApiClient.mweb,
-          YoutubeApiClient.tv,
-        ],
-      );
+      final manifest = await IsolatedYoutubeExplode.instance.manifest(item.id);
       sourceMap = toSourceMap(manifest);
     }
 
@@ -248,7 +232,7 @@ class YoutubeSourcedTrack extends SourcedTrack {
           await toSiblingType(
             0,
             YoutubeVideoInfo.fromVideo(
-              await youtubeClient.videos.get(ytLink!.url!),
+              await IsolatedYoutubeExplode.instance.video(ytLink!.url!),
             ),
           )
         ];
@@ -260,10 +244,8 @@ class YoutubeSourcedTrack extends SourcedTrack {
 
     final query = SourcedTrack.getSearchTerm(track);
 
-    final searchResults = await youtubeClient.search.search(
-      "$query - Topic",
-      filter: TypeFilters.video,
-    );
+    final searchResults =
+        await IsolatedYoutubeExplode.instance.search("$query - Topic");
 
     if (ServiceUtils.onlyContainsEnglish(query)) {
       return await Future.wait(searchResults
@@ -294,12 +276,8 @@ class YoutubeSourcedTrack extends SourcedTrack {
     final newSiblings = siblings.where((s) => s.id != sibling.id).toList()
       ..insert(0, sourceInfo);
 
-    final manifest = await youtubeClient.videos.streamsClient
-        .getManifest(newSourceInfo.id)
-        .timeout(
-          const Duration(seconds: 5),
-          onTimeout: () => throw ClientException("Timeout"),
-        );
+    final manifest =
+        await IsolatedYoutubeExplode.instance.manifest(newSourceInfo.id);
 
     final database = ref.read(databaseProvider);