feat: add download multi tracks support for mobile platform

.fvm/fvm_config.json

@@ -0,0 +1,4 @@
+{
+  "flutterSdkVersion": "3.0.5",
+  "flavors": {}
+}

.gitignore

@@ -75,3 +75,4 @@ dist
 appimage-build
 
 android/key.properties
+.fvm/flutter_sdk

android/app/build.gradle

@@ -50,7 +50,7 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "oss.krtirtho.spotube"
-        minSdkVersion flutter.minSdkVersion
+        minSdkVersion 19
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

android/app/src/main/AndroidManifest.xml

@@ -15,7 +15,7 @@
   </queries>
 
   <application android:label="Spotube" android:name="${applicationName}" android:icon="@mipmap/ic_launcher" android:usesCleartextTraffic="true" android:requestLegacyExternalStorage="true">
-    <activity android:name="com.ryanheise.audioservice.AudioServiceActivity" android:exported="true" android:launchMode="singleTop" android:theme="@style/LaunchTheme" android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode" android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize" >
+    <activity android:name="com.ryanheise.audioservice.AudioServiceActivity" android:exported="true" android:launchMode="singleTop" android:theme="@style/LaunchTheme" android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode" android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize">
       <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues
@@ -28,6 +28,10 @@
 
     </activity>
 
+    <provider android:name="vn.hunghd.flutterdownloader.DownloadedFileProvider" android:authorities="${applicationId}.flutter_downloader.provider" android:exported="false" android:grantUriPermissions="true">
+      <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/provider_paths" />
+    </provider>
+
     <service android:name="com.ryanheise.audioservice.AudioService" android:exported="false">
       <intent-filter>
         <action android:name="android.media.browse.MediaBrowserService" />

lib/main.dart

@@ -2,7 +2,9 @@ import 'dart:convert';
 
 import 'package:audio_service/audio_service.dart';
 import 'package:bitsdojo_window/bitsdojo_window.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_downloader/flutter_downloader.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
 import 'package:go_router/go_router.dart';
 import 'package:hive_flutter/hive_flutter.dart';
@@ -26,8 +28,8 @@ void main() async {
   Hive.registerAdapter(CacheTrackAdapter());
   Hive.registerAdapter(CacheTrackEngagementAdapter());
   Hive.registerAdapter(CacheTrackSkipSegmentAdapter());
+  WidgetsFlutterBinding.ensureInitialized();
   if (kIsDesktop) {
-    WidgetsFlutterBinding.ensureInitialized();
     doWhenWindowReady(() async {
       final localStorage = await SharedPreferences.getInstance();
       final rawSize = localStorage.getString(LocalStorageKeys.windowSizeInfo);
@@ -44,6 +46,11 @@ void main() async {
       }
       appWindow.show();
     });
+  } else {
+    await FlutterDownloader.initialize(
+      debug: kDebugMode,
+      ignoreSsl: true,
+    );
   }
   MobileAudioService? audioServiceHandler;
   runApp(ProviderScope(
@@ -102,8 +109,13 @@ class _SpotubeState extends ConsumerState<Spotube> with WidgetsBindingObserver {
     super.initState();
     SharedPreferences.getInstance().then(((value) => localStorage = value));
     WidgetsBinding.instance.addObserver(this);
+    FlutterDownloader.registerCallback(downloadCallback);
   }
 
+  @pragma('vm:entry-point')
+  static void downloadCallback(
+      String id, DownloadTaskStatus status, int progress) {}
+
   @override
   void dispose() {
     WidgetsBinding.instance.removeObserver(this);

lib/provider/Downloader.dart

@@ -2,12 +2,14 @@ import 'dart:async';
 import 'dart:io';
 
 import 'package:flutter/widgets.dart';
+import 'package:flutter_downloader/flutter_downloader.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:queue/queue.dart';
 import 'package:path/path.dart' as path;
 import 'package:spotube/models/SpotubeTrack.dart';
 import 'package:spotube/provider/UserPreferences.dart';
 import 'package:spotube/provider/YouTube.dart';
+import 'package:spotube/utils/platform.dart';
 import 'package:youtube_explode_dart/youtube_explode_dart.dart';
 
 Queue _queueInstance = Queue(delay: const Duration(seconds: 5));
@@ -27,44 +29,64 @@ class Downloader with ChangeNotifier {
   int currentlyRunning = 0;
   Set<String> inQueue = {};
 
-  void addToQueue(SpotubeTrack track) {
-    if (inQueue.contains(track.id!)) return;
+  void addToQueue(SpotubeTrack track) async {
     currentlyRunning++;
     inQueue.add(track.id!);
     notifyListeners();
-    _queue.add(() async {
-      try {
-        final file =
-            File(path.join(downloadPath, '${track.ytTrack.title}.mp3'));
-        if (file.existsSync() && await onFileExists?.call(track) != true) {
-          return;
-        }
-        file.createSync(recursive: true);
-        StreamManifest manifest =
-            await yt.videos.streamsClient.getManifest(track.ytTrack.url);
-        final audioStream = yt.videos.streamsClient
-            .get(
-              manifest.audioOnly
-                  .where((audio) => audio.codec.mimeType == "audio/mp4")
-                  .withHighestBitrate(),
-            )
-            .asBroadcastStream();
+    final filename = '${track.ytTrack.title}.mp3';
+    if (kIsMobile) {
+      final url =
+          ((await yt.videos.streamsClient.getManifest(track.ytTrack.url)))
+              .audioOnly
+              .where((audio) => audio.codec.mimeType == "audio/mp4")
+              .withHighestBitrate()
+              .url;
+      await FlutterDownloader.enqueue(
+        savedDir: downloadPath,
+        url: url.toString(),
+        fileName: filename,
+        openFileFromNotification: true,
+        showNotification: true,
+      );
+    } else {
+      if (inQueue.contains(track.id!)) return;
+      _queue.add(() async {
+        try {
+          final file = File(path.join(downloadPath, filename));
+          if (file.existsSync() && await onFileExists?.call(track) != true) {
+            return;
+          }
+          file.createSync(recursive: true);
+          StreamManifest manifest =
+              await yt.videos.streamsClient.getManifest(track.ytTrack.url);
+          final audioStream = yt.videos.streamsClient
+              .get(
+                manifest.audioOnly
+                    .where((audio) => audio.codec.mimeType == "audio/mp4")
+                    .withHighestBitrate(),
+              )
+              .asBroadcastStream();
 
-        IOSink outputFileStream = file.openWrite();
-        await audioStream.pipe(outputFileStream);
-        await outputFileStream.flush();
-      } finally {
-        currentlyRunning--;
-        inQueue.remove(track.id);
-        notifyListeners();
-      }
-    });
+          IOSink outputFileStream = file.openWrite();
+          await audioStream.pipe(outputFileStream);
+          await outputFileStream.flush();
+        } finally {
+          currentlyRunning--;
+          inQueue.remove(track.id);
+          notifyListeners();
+        }
+      });
+    }
   }
 
-  cancel() {
-    _queue.cancel();
-    _queueInstance = Queue();
-    _queue = _queueInstance;
+  cancelAll() {
+    if (kIsMobile) {
+      FlutterDownloader.cancelAll();
+    } else {
+      _queue.cancel();
+      _queueInstance = Queue();
+      _queue = _queueInstance;
+    }
   }
 }