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fix: get notified about cover store changes (#1011)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| import 'local_cover_service.dart'; | ||
| import 'dart:async'; | ||
| import 'dart:typed_data'; | ||
| import 'package:safe_change_notifier/safe_change_notifier.dart'; | ||
|
|
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| class LocalCoverModel extends SafeChangeNotifier { | ||
| LocalCoverModel({ | ||
| required LocalCoverService localCoverService, | ||
| }) : _localCoverService = localCoverService; | ||
|
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| final LocalCoverService _localCoverService; | ||
| StreamSubscription<bool>? _propertiesChangedSub; | ||
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| int get storeLength => _localCoverService.storeLength; | ||
| Uint8List? get(String? albumId) => _localCoverService.get(albumId); | ||
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| Future<Uint8List?> getCover({ | ||
| required String albumId, | ||
| required String path, | ||
| }) async => | ||
| _localCoverService.getCover(albumId: albumId, path: path); | ||
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| void init() => _propertiesChangedSub ??= | ||
| _localCoverService.propertiesChanged.listen((_) => notifyListeners()); | ||
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| @override | ||
| Future<void> dispose() async { | ||
| await _propertiesChangedSub?.cancel(); | ||
| super.dispose(); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| import 'dart:async'; | ||
| import 'dart:io'; | ||
| import 'dart:typed_data'; | ||
|
|
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| import 'package:audio_metadata_reader/audio_metadata_reader.dart'; | ||
| import 'package:collection/collection.dart'; | ||
|
|
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| import '../compute_isolate.dart'; | ||
| import '../constants.dart'; | ||
| import '../persistence_utils.dart'; | ||
|
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| class LocalCoverService { | ||
| final _propertiesChangedController = StreamController<bool>.broadcast(); | ||
| Stream<bool> get propertiesChanged => _propertiesChangedController.stream; | ||
|
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| var _store = <String, Uint8List?>{}; | ||
| int get storeLength => _store.length; | ||
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| Future<Uint8List?> getCover({ | ||
| required String albumId, | ||
| required String path, | ||
| }) async { | ||
| if (albumId.isNotEmpty == true) { | ||
| final metadata = await readMetadata(File(path), getImage: true); | ||
| final cover = _put( | ||
| albumId: albumId, | ||
| data: metadata.pictures | ||
| .firstWhereOrNull((e) => e.bytes.isNotEmpty) | ||
| ?.bytes, | ||
| ); | ||
| if (cover != null) { | ||
| _propertiesChangedController.add(true); | ||
| } | ||
| return cover; | ||
| } | ||
| return null; | ||
| } | ||
|
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| Uint8List? _put({required String albumId, Uint8List? data}) { | ||
| return _store.containsKey(albumId) | ||
| ? _store.update(albumId, (value) => data) | ||
| : _store.putIfAbsent(albumId, () => data); | ||
| } | ||
|
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| Uint8List? get(String? albumId) => albumId == null ? null : _store[albumId]; | ||
|
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| Future<void> write() async => writeUint8ListMap(_store, kCoverStore); | ||
|
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| // This does not make much sense except for small libs, where the store is filled | ||
| // fast anyways. Let's keep it for eventual use... | ||
| Future<void> read() async => | ||
| _store = await computeIsolate(() => readUint8ListMap(kCoverStore)) ?? []; | ||
|
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| Future<void> dispose() async => _propertiesChangedController.close(); | ||
| } |
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