124 lines
3.8 KiB
Dart
124 lines
3.8 KiB
Dart
import '../models/plex_metadata.dart';
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import 'app_logger.dart';
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import 'base_notifier.dart';
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import 'hierarchical_event_mixin.dart';
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/// Types of watch state changes
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enum WatchStateChangeType { watched, unwatched, progressUpdate }
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/// Event representing a watch state change with parent chain for hierarchical invalidation
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class WatchStateEvent with HierarchicalEventMixin {
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/// The item that changed
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@override
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final String ratingKey;
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/// Composite key: serverId:ratingKey
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@override
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final String globalKey;
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/// Server this item belongs to
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@override
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final String serverId;
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/// Type of change
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final WatchStateChangeType changeType;
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/// Parent chain for hierarchical invalidation
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/// For an episode: [seasonRatingKey, showRatingKey]
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/// For a season: [showRatingKey]
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/// For a movie: []
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@override
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final List<String> parentChain;
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/// Media type that changed
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final String mediaType;
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/// New progress value (for progressUpdate)
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final int? viewOffset;
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/// Whether item is now considered watched (>90% progress or marked)
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final bool? isNowWatched;
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WatchStateEvent({
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required this.ratingKey,
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required this.serverId,
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required this.changeType,
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required this.parentChain,
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required this.mediaType,
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this.viewOffset,
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this.isNowWatched,
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}) : globalKey = '$serverId:$ratingKey';
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@override
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String toString() => 'WatchStateEvent($changeType, $globalKey, parents: $parentChain)';
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}
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/// Notifier for watch state changes across the app.
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///
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/// Singleton pattern following [LibraryRefreshNotifier]. Screens subscribe
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/// to receive events when items are marked watched/unwatched or progress updates.
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class WatchStateNotifier extends BaseNotifier<WatchStateEvent> {
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static final WatchStateNotifier _instance = WatchStateNotifier._internal();
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factory WatchStateNotifier() => _instance;
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WatchStateNotifier._internal();
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/// Filter for events affecting a specific server
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Stream<WatchStateEvent> forServer(String serverId) => stream.where((e) => e.serverId == serverId);
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/// Filter for events affecting a specific item or its children
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Stream<WatchStateEvent> forItem(String ratingKey) => stream.where((e) => e.affectsItem(ratingKey));
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/// Emit a watch state event with logging
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@override
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void notify(WatchStateEvent event) {
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appLogger.d('WatchStateNotifier: $event');
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super.notify(event);
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}
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/// Helper to emit a watched/unwatched event from metadata
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void notifyWatched({required PlexMetadata metadata, bool isNowWatched = true}) {
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notify(
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WatchStateEvent(
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ratingKey: metadata.ratingKey,
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serverId: metadata.serverId ?? '',
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changeType: isNowWatched ? WatchStateChangeType.watched : WatchStateChangeType.unwatched,
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parentChain: _buildParentChain(metadata),
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mediaType: metadata.type,
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isNowWatched: isNowWatched,
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),
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);
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}
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/// Helper to emit a progress update event
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void notifyProgress({required PlexMetadata metadata, required int viewOffset, required int duration}) {
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const threshold = 0.90;
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final isNowWatched = duration > 0 && (viewOffset / duration) >= threshold;
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notify(
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WatchStateEvent(
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ratingKey: metadata.ratingKey,
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serverId: metadata.serverId ?? '',
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changeType: WatchStateChangeType.progressUpdate,
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parentChain: _buildParentChain(metadata),
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mediaType: metadata.type,
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viewOffset: viewOffset,
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isNowWatched: isNowWatched,
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),
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);
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}
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/// Build parent chain from metadata's parent keys
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List<String> _buildParentChain(PlexMetadata metadata) {
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final chain = <String>[];
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if (metadata.parentRatingKey != null) {
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chain.add(metadata.parentRatingKey!);
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}
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if (metadata.grandparentRatingKey != null) {
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chain.add(metadata.grandparentRatingKey!);
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}
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return chain;
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}
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}
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