bvandeusen
035b000bb0
Query-builder methods come through the generated AppDb, not the drift package directly — the import was dead. (#427 S4a) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
68 lines
2.2 KiB
Dart
68 lines
2.2 KiB
Dart
// "Shuffle all" source (#427 S4). Always-present; the pool degrades
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// gracefully with reachability:
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// online → GET /api/library/shuffle (random over the whole library)
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// offline → a client shuffle over the entire local cache index
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//
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// Offline is a UNION over every cached track regardless of storage
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// bucket — liked AND recently-played both included. The two-bucket
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// split (S2) is storage/eviction-only and never filters playback,
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// which is exactly the property this relies on.
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import 'dart:math';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import '../library/library_providers.dart' show libraryApiProvider;
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import '../models/track.dart';
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import 'adapters.dart';
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import 'audio_cache_manager.dart' show appDbProvider;
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import 'offline_provider.dart';
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class ShuffleSource {
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ShuffleSource(this._ref);
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final Ref _ref;
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/// Returns up to [limit] tracks to play as a shuffle-all. Online:
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/// server-random. Offline: every cached track (liked + recent),
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/// shuffled client-side. Empty offline → nothing is cached yet.
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Future<List<TrackRef>> tracks({int limit = 100}) async {
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if (_ref.read(offlineProvider)) {
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return _offline(limit);
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}
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final api = await _ref.read(libraryApiProvider.future);
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return api.shuffle(limit: limit);
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}
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Future<List<TrackRef>> _offline(int limit) async {
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final db = _ref.read(appDbProvider);
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final cachedIds =
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(await db.select(db.audioCacheIndex).get()).map((r) => r.trackId).toSet();
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if (cachedIds.isEmpty) return const [];
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final meta = await (db.select(db.cachedTracks)
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..where((t) => t.id.isIn(cachedIds.toList())))
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.get();
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if (meta.isEmpty) return const [];
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final artistName = {
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for (final a in await db.select(db.cachedArtists).get()) a.id: a.name
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};
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final albumTitle = {
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for (final a in await db.select(db.cachedAlbums).get()) a.id: a.title
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};
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final refs = [
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for (final t in meta)
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t.toRef(
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artistName: artistName[t.artistId] ?? '',
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albumTitle: albumTitle[t.albumId] ?? '',
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)
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];
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refs.shuffle(Random());
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return refs.length > limit ? refs.sublist(0, limit) : refs;
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}
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}
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final shuffleSourceProvider =
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Provider<ShuffleSource>((ref) => ShuffleSource(ref));
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