aves/lib/widgets/common/providers/media_store_collection_provider.dart
2020-03-07 15:53:41 +09:00

87 lines
3.3 KiB
Dart

import 'package:aves/model/collection_lens.dart';
import 'package:aves/model/collection_source.dart';
import 'package:aves/model/image_entry.dart';
import 'package:aves/model/image_file_service.dart';
import 'package:aves/model/metadata_db.dart';
import 'package:aves/model/settings.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_native_timezone/flutter_native_timezone.dart';
import 'package:provider/provider.dart';
class MediaStoreCollectionProvider extends StatefulWidget {
final Widget child;
const MediaStoreCollectionProvider({@required this.child});
@override
_MediaStoreCollectionProviderState createState() => _MediaStoreCollectionProviderState();
}
class _MediaStoreCollectionProviderState extends State<MediaStoreCollectionProvider> {
Future<CollectionLens> collectionFuture;
static const EventChannel eventChannel = EventChannel('deckers.thibault/aves/mediastore');
@override
void initState() {
super.initState();
collectionFuture = _create();
}
Future<CollectionLens> _create() async {
final stopwatch = Stopwatch()..start();
final mediaStoreSource = CollectionSource();
final mediaStoreBaseLens = CollectionLens(
source: mediaStoreSource,
groupFactor: settings.collectionGroupFactor,
sortFactor: settings.collectionSortFactor,
);
await metadataDb.init(); // <20ms
final currentTimeZone = await FlutterNativeTimezone.getLocalTimezone(); // <20ms
final catalogTimeZone = settings.catalogTimeZone;
if (currentTimeZone != catalogTimeZone) {
// clear catalog metadata to get correct date/times when moving to a different time zone
debugPrint('$runtimeType clear catalog metadata to get correct date/times');
await metadataDb.clearMetadataEntries();
settings.catalogTimeZone = currentTimeZone;
}
final allEntries = List<ImageEntry>();
eventChannel.receiveBroadcastStream().cast<Map>().listen(
(entryMap) => allEntries.add(ImageEntry.fromMap(entryMap)),
onDone: () async {
debugPrint('$runtimeType stream complete in ${stopwatch.elapsed.inMilliseconds}ms');
mediaStoreSource.addAll(allEntries);
// TODO reduce setup time until here
mediaStoreSource.updateAlbums(); // <50ms
await mediaStoreSource.loadCatalogMetadata(); // 650ms
await mediaStoreSource.catalogEntries(); // <50ms
await mediaStoreSource.loadAddresses(); // 350ms
await mediaStoreSource.locateEntries(); // <50ms
debugPrint('$runtimeType setup end, elapsed=${stopwatch.elapsed}');
},
onError: (error) => debugPrint('$runtimeType mediastore stream error=$error'),
);
// TODO split image fetch AND/OR cache fetch across sessions
await ImageFileService.getImageEntries(); // 460ms
return mediaStoreBaseLens;
}
@override
Widget build(BuildContext context) {
return FutureBuilder(
future: collectionFuture,
builder: (futureContext, AsyncSnapshot<CollectionLens> snapshot) {
final collection = (snapshot.connectionState == ConnectionState.done && !snapshot.hasError) ? snapshot.data : CollectionLens.empty();
return ChangeNotifierProvider<CollectionLens>.value(
value: collection,
child: widget.child,
);
},
);
}
}