edde746
4f736c555b
Plex API returns Directory entries without type field, causing TypeError crash in fromJson. Made fields nullable and migrated callers to use mediaType enum and displayTitle getter instead of raw string access.
102 lines
3.2 KiB
Dart
102 lines
3.2 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 'global_key_utils.dart';
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import 'hierarchical_event_mixin.dart';
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/// Event representing a media item deletion with parent chain for hierarchical invalidation
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class DeletionEvent with HierarchicalEventMixin {
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/// The ratingKey of the deleted item
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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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/// 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 of the deleted item
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final String mediaType;
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/// Number of leaf items (episodes) contained in the deleted item.
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/// For an episode: 1. For a season: its episode count. For a show: its total episode count.
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final int leafCount;
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/// True if only the local download was deleted (not the server-side media).
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/// Screens should only remove items for download deletions when in offline mode.
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final bool isDownloadOnly;
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DeletionEvent({
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required this.ratingKey,
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required this.serverId,
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required this.parentChain,
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required this.mediaType,
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this.leafCount = 1,
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this.isDownloadOnly = false,
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}) : globalKey = buildGlobalKey(serverId, ratingKey);
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@override
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String toString() => 'DeletionEvent(deleted: $globalKey, type: $mediaType, parents: $parentChain)';
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}
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/// Notifier for media deletion events across the app.
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///
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/// Singleton pattern following [WatchStateNotifier]. Screens subscribe
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/// to receive events when items are deleted from the server.
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class DeletionNotifier extends BaseNotifier<DeletionEvent> {
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static final DeletionNotifier _instance = DeletionNotifier._internal();
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factory DeletionNotifier() => _instance;
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DeletionNotifier._internal();
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/// Filter for events affecting a specific server
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Stream<DeletionEvent> 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<DeletionEvent> forItem(String ratingKey) => stream.where((e) => e.affectsItem(ratingKey));
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/// Emit a deletion event with logging
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@override
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void notify(DeletionEvent event) {
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appLogger.d('DeletionNotifier: $event');
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super.notify(event);
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}
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/// Helper to emit a deletion event from metadata
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void notifyDeleted({required PlexMetadata metadata, bool isDownloadOnly = false}) {
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notify(
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DeletionEvent(
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ratingKey: metadata.ratingKey,
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serverId: metadata.serverId ?? '',
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parentChain: _buildParentChain(metadata),
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mediaType: metadata.type ?? '',
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leafCount: metadata.leafCount ?? 1,
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isDownloadOnly: isDownloadOnly,
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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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