🐛 Fix: downloaded files not playing on IOS

lib/cubits/download/download_cubit.dart

@@ -4,6 +4,8 @@ import 'dart:io';
 import 'package:background_downloader/background_downloader.dart';
 import 'package:equatable/equatable.dart';
 import 'package:hive_flutter/hive_flutter.dart';
+import 'package:path/path.dart' as path;
+import 'package:path_provider/path_provider.dart';
 import 'package:rxdart/rxdart.dart';
 import 'package:varanasi_mobile_app/features/user-library/data/user_library.dart';
 import 'package:varanasi_mobile_app/models/app_config.dart';
@@ -21,7 +23,7 @@ import 'package:varanasi_mobile_app/utils/logger.dart';
 part 'download_state.dart';
 
 class DownloadCubit extends AppCubit<DownloadState> {
-  DownloadCubit() : super(const DownloadState());
+  DownloadCubit() : super(DownloadInitial());
 
   late final Box<DownloadedMedia> _downloadBox;
   late final FileDownloader _downloader;
@@ -32,11 +34,19 @@ class DownloadCubit extends AppCubit<DownloadState> {
 
   Box<DownloadedMedia> get downloadBox => _downloadBox;
 
+  FileDownloader get downloader => _downloader;
+
+  DownloadLoadedState get loadedState => state as DownloadLoadedState;
+
   @override
   FutureOr<void> init() async {
+    final baseDir = await getApplicationDocumentsDirectory();
+    emit(DownloadLoadedState(downloadDirectory: baseDir));
     _songMap = {};
     _downloadBox = Hive.box<DownloadedMedia>(AppStrings.downloadBoxName);
-    _downloader = FileDownloader();
+    _downloader = FileDownloader()
+      ..trackTasks()
+      ..resumeFromBackground();
     _downloader.updates.listen((update) {
       if (update is TaskStatusUpdate) {
         _handleTaskStatusUpdate(update);
@@ -144,12 +154,13 @@ class DownloadCubit extends AppCubit<DownloadState> {
     for (final song in filteredsong) {
       _songMap[song.itemId] = song;
     }
-    emit(state.updateProgress(MapEntry(playlist.id!, 0)));
+    emit(loadedState.updateProgress(MapEntry(playlist.id!, 0)));
     await _downloader.downloadBatch(
       tasks,
       batchProgressCallback: (succeeded, failed) {
         final percentComplete = (succeeded + failed) / tasks.length;
-        emit(state.updateProgress(MapEntry(playlist.id!, percentComplete)));
+        emit(loadedState
+            .updateProgress(MapEntry(playlist.id!, percentComplete)));
         _logger.i('Batch progress: $succeeded, $failed');
       },
       taskStatusCallback: _handleTaskStatusUpdate,
@@ -298,4 +309,16 @@ class DownloadCubit extends AppCubit<DownloadState> {
     );
     return library;
   }
+
+  String getDownloadPath(String id) {
+    final item = _downloadBox.get(id);
+    final filename = _fileNameFromSong(item!.media);
+    return path.join(loadedState.downloadDirectory.path, '', filename);
+  }
+
+  File? getCacheFile(String itemId, String itemUrl) {
+    final ext = itemUrl.split('.').last;
+    final fileName = '$itemId.$ext';
+    return File(path.join(loadedState.downloadDirectory.path, '', fileName));
+  }
 }

lib/cubits/download/download_state.dart

@@ -1,25 +1,38 @@
 // ignore_for_file: public_member_api_docs, sort_constructors_first
 part of 'download_cubit.dart';
 
-class DownloadState extends Equatable {
+sealed class DownloadState extends Equatable {
+  const DownloadState();
+
+  @override
+  List<Object> get props => [];
+}
+
+class DownloadInitial extends DownloadState {}
+
+class DownloadLoadedState extends DownloadState {
   final Map<String, double> playlistProgressMap;
+  final Directory downloadDirectory;
 
-  const DownloadState({
+  const DownloadLoadedState({
     this.playlistProgressMap = const {},
+    required this.downloadDirectory,
   });
 
   @override
-  List<Object> get props => [playlistProgressMap];
+  List<Object> get props => [playlistProgressMap, downloadDirectory];
 
-  DownloadState copyWith({
+  DownloadLoadedState copyWith({
     Map<String, double>? playlistProgressMap,
+    Directory? downloadDirectory,
   }) {
-    return DownloadState(
+    return DownloadLoadedState(
       playlistProgressMap: playlistProgressMap ?? this.playlistProgressMap,
+      downloadDirectory: downloadDirectory ?? this.downloadDirectory,
     );
   }
 
-  DownloadState updateProgress(MapEntry<String, double> entry) {
+  DownloadLoadedState updateProgress(MapEntry<String, double> entry) {
     final Map<String, double> oldProgress = Map.from(playlistProgressMap)
       ..addEntries([entry]);
     return copyWith(

lib/features/library/ui/library_widgets/page.dart

@@ -1,3 +1,4 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart' hide Typography;
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
@@ -134,7 +135,7 @@ class _LibraryContentState extends State<LibraryContent> {
                                 sourceLibrary: state.sourceLibrary,
                               ),
                               DisableChild(
-                                disabled:
+                                disabled: !kDebugMode &&
                                     state.sourceLibrary?.isDownload == true,
                                 child: DownloadPlaylist(
                                   playlist: state.playlist,

lib/features/user-library/ui/user_library_page.dart

@@ -52,6 +52,7 @@ class UserLibraryPage extends HookWidget {
           }
           final library = [...state.library, downloadSnapshot.data]
               .whereType<UserLibrary>()
+              .where((element) => element.isNotEmpty)
               .toList()
             ..sort();
           if (library.isEmpty) return const EmptyUserLibrary();

lib/utils/player/audio_handler_impl.dart

@@ -2,13 +2,16 @@ import 'dart:async';
 
 import 'package:audio_service/audio_service.dart';
 import 'package:audio_session/audio_session.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:hive/hive.dart';
 import 'package:just_audio/just_audio.dart';
 import 'package:rxdart/rxdart.dart';
 import 'package:varanasi_mobile_app/cubits/config/config_cubit.dart';
+import 'package:varanasi_mobile_app/cubits/download/download_cubit.dart';
 import 'package:varanasi_mobile_app/models/app_config.dart';
 import 'package:varanasi_mobile_app/models/download.dart';
 import 'package:varanasi_mobile_app/utils/constants/strings.dart';
+import 'package:varanasi_mobile_app/utils/helpers/get_app_context.dart';
 
 import 'typings.dart';
 
@@ -183,13 +186,14 @@ final class AudioHandlerImpl extends BaseAudioHandler
     final downloaded = _isSongDownloaded(itemId);
     if (!downloaded) {
       final uri = Uri.parse(mediaItem.id);
+      // final cacheFile =
+      //     appContext.read<DownloadCubit>().getCacheFile(itemId, mediaItem.id);
       final audioSource = LockCachingAudioSource(uri);
       _mediaItemExpando[audioSource] = mediaItem;
       return audioSource;
     }
-    final box = Hive.box<DownloadedMedia>(AppStrings.downloadBoxName);
-    final downloadedMedia = box.get(itemId);
-    final audioSource = AudioSource.file(downloadedMedia!.path);
+    final path = appContext.read<DownloadCubit>().getDownloadPath(itemId);
+    final audioSource = AudioSource.file(path);
     _mediaItemExpando[audioSource] = mediaItem;
     return audioSource;
   }
@@ -199,7 +203,8 @@ final class AudioHandlerImpl extends BaseAudioHandler
 
   @override
   Future<void> addQueueItem(MediaItem mediaItem) async {
-    await _playlist.add(_itemToSource(mediaItem));
+    final source = _itemToSource(mediaItem);
+    await _playlist.add(source);
   }
 
   @override
@@ -209,7 +214,8 @@ final class AudioHandlerImpl extends BaseAudioHandler
 
   @override
   Future<void> insertQueueItem(int index, MediaItem mediaItem) async {
-    await _playlist.insert(index, _itemToSource(mediaItem));
+    final source = _itemToSource(mediaItem);
+    await _playlist.insert(index, source);
   }
 
   @override

lib/widgets/download_button.dart

@@ -61,7 +61,7 @@ class DownloadPlaylist extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final progress = context.select((DownloadCubit value) =>
-        value.state.playlistProgressMap[playlist.id] ?? 0);
+        value.loadedState.playlistProgressMap[playlist.id] ?? 0);
     final downloadBox = context.read<DownloadCubit>().downloadBox;
     final keys = playlist.mediaItems?.map((e) => e.itemId).toList();
     return ValueListenableBuilder(

pubspec.lock

@@ -897,7 +897,7 @@ packages:
     source: hosted
     version: "0.3.3+3"
   path:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path
       sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
@@ -913,13 +913,13 @@ packages:
     source: hosted
     version: "1.0.1"
   path_provider:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path_provider
-      sha256: "3087813781ab814e4157b172f1a11c46be20179fcc9bea043e0fba36bc0acaa2"
+      sha256: a1aa8aaa2542a6bc57e381f132af822420216c80d4781f7aa085ca3229208aaa
       url: "https://pub.dev"
     source: hosted
-    version: "2.0.15"
+    version: "2.1.1"
   path_provider_android:
     dependency: transitive
     description:

pubspec.yaml

@@ -75,6 +75,8 @@ dependencies:
   background_downloader: ^7.10.1
   lottie: ^2.7.0
   percent_indicator: ^4.2.3
+  path_provider: ^2.1.1
+  path: ^1.8.3
 
 dev_dependencies:
   flutter_test: