579 lines
23 KiB
Dart
579 lines
23 KiB
Dart
import 'dart:async';
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import '../media/ids.dart';
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import '../media/media_hub.dart';
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import '../media/media_item.dart';
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import '../media/media_kind.dart';
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import '../media/media_library.dart';
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import '../media/media_server_client.dart';
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import '../exceptions/media_server_exceptions.dart';
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import '../utils/app_logger.dart';
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import '../utils/external_ids.dart';
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import '../utils/global_key_utils.dart';
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import '../utils/search_relevance.dart';
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import 'local_playback_history.dart';
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import 'multi_server_manager.dart';
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typedef OnDeckAggregationResult = ({
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List<MediaItem> items,
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Set<String> succeededServerIds,
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Set<String> cancelledServerIds,
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});
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typedef HubAggregationResult = ({List<MediaHub> hubs, Set<String> succeededServerIds, Set<String> cancelledServerIds});
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typedef LibraryAggregationResult = ({
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List<MediaLibrary> libraries,
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Set<String> succeededServerIds,
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Set<String> cancelledServerIds,
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});
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/// Whether [error] is a client-side abort (client teardown mid-request)
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/// rather than a genuine server failure. Aggregation reports these servers
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/// in `cancelledServerIds` so callers can tell a *disrupted* pass — whose
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/// results say nothing about actual content — from a settled failure.
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bool _isCancellation(Object error) => error is MediaServerHttpException && error.isCancellation;
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/// Cross-server aggregation: fans calls out to every online client and
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/// merges the results. Single-server operations now go through the
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/// [MediaServerClient] interface directly (resolved via
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/// [ProviderExtensions.tryGetMediaClientForServer] etc.), so this service
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/// only owns the genuinely multi-server flows: home/discover hubs, on-deck,
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/// search, and the global library list.
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class DataAggregationService {
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final MultiServerManager _serverManager;
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DataAggregationService(this._serverManager);
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/// Online clients, optionally restricted to [serverIds] — delta refreshes
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/// fan out to newly-online servers only.
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Map<String, MediaServerClient> _clientsFor(Set<String>? serverIds) {
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final clients = _serverManager.onlineClients;
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if (serverIds == null) return clients;
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return {
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for (final entry in clients.entries)
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if (serverIds.contains(entry.key)) entry.key: entry.value,
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};
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}
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/// Fetch libraries from all online clients regardless of backend, returning
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/// the merged neutral [MediaLibrary]s alongside the ids of the servers whose
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/// fetch actually succeeded. [serverIds] restricts the fan-out to those
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/// servers.
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///
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/// A per-server `fetchLibraries()` failure is swallowed (that server simply
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/// contributes no libraries) so one unreachable server doesn't sink the whole
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/// list. [succeededServerIds] lets callers tell a *failed* fetch apart from a
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/// server that genuinely has no libraries — both contribute nothing, so
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/// conflating them would let a transient failure be cached as "loaded" and
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/// never retried. Servers whose fetch was aborted client-side land in
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/// `cancelledServerIds` — a disrupted pass, unlike a settled failure, must
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/// never be committed as authoritative.
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Future<LibraryAggregationResult> getMediaLibrariesFromAllServers({Set<String>? serverIds}) async {
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final clients = _clientsFor(serverIds);
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if (clients.isEmpty) {
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appLogger.w('No online servers available for fetching libraries (neutral)');
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return (
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libraries: const <MediaLibrary>[],
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succeededServerIds: const <String>{},
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cancelledServerIds: const <String>{},
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);
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}
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final succeededServerIds = <String>{};
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final cancelledServerIds = <String>{};
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final futures = clients.entries.map((entry) async {
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try {
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final libraries = await entry.value.fetchLibraries();
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succeededServerIds.add(entry.key);
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return libraries;
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} catch (e, stackTrace) {
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if (_isCancellation(e)) cancelledServerIds.add(entry.key);
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appLogger.e('Failed neutral library fetch from ${entry.key}', error: e, stackTrace: stackTrace);
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return <MediaLibrary>[];
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}
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});
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final results = await Future.wait(futures);
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return (
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libraries: [for (final list in results) ...list],
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succeededServerIds: succeededServerIds,
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cancelledServerIds: cancelledServerIds,
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);
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}
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/// Fetch "On Deck" (Continue Watching) from all servers and merge by recency.
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/// Items are tagged with server info by the underlying client. Returns
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/// neutral [MediaItem]s plus the ids of servers whose fetch succeeded.
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/// [serverIds] restricts the fan-out to those servers.
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Future<OnDeckAggregationResult> getOnDeckFromAllServers({
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int? limit,
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Set<String>? hiddenLibraryKeys,
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Set<String>? serverIds,
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}) async {
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final clients = _clientsFor(serverIds);
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if (clients.isEmpty) {
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appLogger.w('No online servers available for fetching on deck');
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return (items: const <MediaItem>[], succeededServerIds: const <String>{}, cancelledServerIds: const <String>{});
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}
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final cancelledServerIds = <String>{};
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final futures = clients.entries.map((entry) async {
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final client = entry.value;
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try {
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final items = await client.fetchContinueWatching(count: limit);
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return (serverId: entry.key, items: items);
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} catch (e, st) {
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if (_isCancellation(e)) cancelledServerIds.add(entry.key);
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appLogger.e('Failed on-deck fetch from ${entry.key}', error: e, stackTrace: st);
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return (serverId: null, items: <MediaItem>[]);
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}
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});
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final results = await Future.wait(futures);
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final succeededServerIds = {
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for (final result in results)
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if (result.serverId != null) result.serverId!,
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};
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final allOnDeck = results.expand((result) => result.items).toList();
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// Filter out items from hidden libraries
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List<MediaItem> filteredOnDeck = allOnDeck;
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if (hiddenLibraryKeys != null && hiddenLibraryKeys.isNotEmpty) {
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filteredOnDeck = allOnDeck.where((item) {
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if (item.libraryId == null || item.serverId == null) return true;
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final globalKey = buildGlobalKey(ServerId(item.serverId!), item.libraryId!);
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return !hiddenLibraryKeys.contains(globalKey);
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}).toList();
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}
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// Sort by most recently viewed, falling back to addedAt for unwatched items.
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// Same key as JellyfinClient's continue-watching merge (MediaItem.recencySortKey)
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// so per-server and cross-server ordering can't drift apart.
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filteredOnDeck.sort((a, b) => b.recencySortKey.compareTo(a.recencySortKey));
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filteredOnDeck = await _deduplicateContinueWatching(filteredOnDeck);
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// Apply limit if specified
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final items = limit != null && limit < filteredOnDeck.length ? filteredOnDeck.sublist(0, limit) : filteredOnDeck;
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appLogger.i('Fetched ${items.length} on deck items from all servers');
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return (items: items, succeededServerIds: succeededServerIds, cancelledServerIds: cancelledServerIds);
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}
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/// Merge an [existing] Continue Watching list with [fresh] rows from
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/// newly-online servers: same recency ordering and cross-server identity
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/// dedup as [getOnDeckFromAllServers], applied to the union.
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Future<List<MediaItem>> mergeContinueWatching(List<MediaItem> existing, List<MediaItem> fresh, {int? limit}) async {
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final combined = [...existing, ...fresh]..sort((a, b) => b.recencySortKey.compareTo(a.recencySortKey));
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final deduped = await _deduplicateContinueWatching(combined);
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return limit != null && limit < deduped.length ? deduped.sublist(0, limit) : deduped;
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}
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Future<List<MediaItem>> _deduplicateContinueWatching(List<MediaItem> items) async {
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if (items.length < 2) return items;
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final bucketCounts = <String, int>{};
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for (final item in items) {
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final bucket = _continueWatchingTitleBucket(item);
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if (bucket == null) continue;
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bucketCounts[bucket] = (bucketCounts[bucket] ?? 0) + 1;
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}
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final duplicateBuckets = {
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for (final entry in bucketCounts.entries)
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if (entry.value > 1) entry.key,
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};
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if (duplicateBuckets.isEmpty) return items;
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final externalIdLoads = <String, Future<ExternalIds>>{};
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final identityKeysByIndex = <int, Set<String>>{};
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final identityKeyLoads = <Future<void>>[];
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for (var i = 0; i < items.length; i++) {
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if (!duplicateBuckets.contains(_continueWatchingTitleBucket(items[i]))) continue;
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final index = i;
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identityKeyLoads.add(
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_continueWatchingIdentityKeys(items[index], externalIdLoads).then((keys) => identityKeysByIndex[index] = keys),
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);
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}
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await Future.wait(identityKeyLoads);
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// Group duplicates instead of greedily dropping them: the first item to
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// claim an identity key anchors the group and holds its shelf slot;
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// later items sharing a claimed key join as members without claiming
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// their own keys (same transitive semantics as the old drop). Each slot
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// then shows the member the user most recently played on this device —
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// servers sync watch state across guid-linked siblings, so their
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// lastViewedAt ties and can't tell the 4K copy from the 1080p one
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// (#1492). Without local history the anchor (recency order) stands.
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final keyToGroup = <String, int>{};
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final groups = <List<MediaItem>>[];
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final groupSlots = <int, int>{};
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final result = <MediaItem>[];
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for (var i = 0; i < items.length; i++) {
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final item = items[i];
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if (!duplicateBuckets.contains(_continueWatchingTitleBucket(item))) {
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result.add(item);
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continue;
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}
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final identityKeys = identityKeysByIndex[i] ?? const <String>{};
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if (identityKeys.isEmpty) {
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result.add(item);
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continue;
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}
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var joined = false;
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for (final key in identityKeys) {
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final groupIndex = keyToGroup[key];
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if (groupIndex != null) {
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groups[groupIndex].add(item);
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joined = true;
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break;
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}
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}
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if (joined) continue;
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final groupIndex = groups.length;
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groups.add([item]);
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for (final key in identityKeys) {
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keyToGroup[key] = groupIndex;
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}
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groupSlots[result.length] = groupIndex;
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result.add(item);
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}
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if (groupSlots.isEmpty) return result;
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final lastPlayed = await LocalPlaybackHistory.snapshot();
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for (final slot in groupSlots.entries) {
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final members = groups[slot.value];
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if (members.length > 1) {
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result[slot.key] = _preferLocallyLastPlayed(members, lastPlayed);
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}
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}
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return result;
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}
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/// The duplicate-group member most recently played on this device (by item
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/// or series key), or the anchor — `members.first`, the group's most recent
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/// item by [MediaItem.recencySortKey] — when the local history has nothing
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/// newer to say.
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MediaItem _preferLocallyLastPlayed(List<MediaItem> members, Map<String, int> lastPlayed) {
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var winner = members.first;
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var winnerLastPlayedAt = 0;
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for (final member in members) {
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final itemTs = lastPlayed[member.globalKey] ?? 0;
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final seriesKey = member.seriesGlobalKey;
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final seriesTs = seriesKey != null ? (lastPlayed[seriesKey] ?? 0) : 0;
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final lastPlayedAt = itemTs > seriesTs ? itemTs : seriesTs;
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if (lastPlayedAt > winnerLastPlayedAt) {
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winner = member;
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winnerLastPlayedAt = lastPlayedAt;
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}
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}
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return winner;
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}
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String? _continueWatchingTitleBucket(MediaItem item) {
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final scope = _continueWatchingIdentityScope(item);
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if (scope == null) return null;
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final title = switch (item.kind) {
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MediaKind.episode || MediaKind.season => item.grandparentTitle ?? item.parentTitle ?? item.title,
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_ => item.title,
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};
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final normalized = title?.trim().toLowerCase().replaceAll(RegExp(r'\s+'), ' ');
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if (normalized == null || normalized.isEmpty) return null;
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return '$scope:$normalized';
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}
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Future<Set<String>> _continueWatchingIdentityKeys(
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MediaItem item,
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Map<String, Future<ExternalIds>> externalIdLoads,
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) async {
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final scope = _continueWatchingIdentityScope(item);
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if (scope == null) return const {};
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final keys = <String>{};
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final serverId = item.serverId;
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final targetId = _continueWatchingIdentityTargetId(item);
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final client = serverId == null ? null : _serverManager.getClient(ServerId(serverId));
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if (client != null && targetId != null && targetId.isNotEmpty) {
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try {
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final cacheKey = buildGlobalKey(ServerId(serverId!), targetId);
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final externalIds = await externalIdLoads.putIfAbsent(cacheKey, () => client.fetchExternalIds(targetId));
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_addExternalIdentityKeys(keys, scope, externalIds);
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} catch (e, stackTrace) {
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appLogger.d(
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'Failed to resolve Continue Watching identity for ${item.globalKey}',
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error: e,
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stackTrace: stackTrace,
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);
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}
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}
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final stableGuid = _stableMediaGuid(item.guid);
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if (stableGuid != null) {
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final guidScope = item.kind == MediaKind.episode ? 'episode' : scope;
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keys.add('$guidScope:guid:$stableGuid');
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}
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return keys;
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}
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String? _continueWatchingIdentityScope(MediaItem item) {
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return switch (item.kind) {
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MediaKind.episode || MediaKind.season || MediaKind.show => 'show',
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MediaKind.movie => 'movie',
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_ => null,
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};
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}
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String? _continueWatchingIdentityTargetId(MediaItem item) {
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return switch (item.kind) {
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MediaKind.episode => item.grandparentId,
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MediaKind.season => item.grandparentId ?? item.parentId,
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MediaKind.show || MediaKind.movie => item.id,
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_ => null,
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};
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}
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void _addExternalIdentityKeys(Set<String> keys, String scope, ExternalIds externalIds) {
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final imdb = externalIds.imdb?.trim().toLowerCase();
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if (imdb != null && imdb.isNotEmpty) keys.add('$scope:imdb:$imdb');
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final tmdb = externalIds.tmdb;
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if (tmdb != null) keys.add('$scope:tmdb:$tmdb');
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final tvdb = externalIds.tvdb;
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if (tvdb != null) keys.add('$scope:tvdb:$tvdb');
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}
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String? _stableMediaGuid(String? guid) {
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final value = guid?.trim();
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if (value == null || value.isEmpty) return null;
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if (!value.contains('://')) return null;
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if (value.contains('agents.none://')) return null;
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return value.toLowerCase();
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}
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/// Fetch recommendation hubs from all servers as neutral [MediaHub]s.
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/// When useGlobalHubs is true (default), rich-hub backends use their true
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/// home page hubs (Plex's promoted/global hub endpoint).
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/// Backends without rich home hubs fall back to per-library hubs so one
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/// capped "Latest" response cannot hide whole library types.
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/// [serverIds] restricts the fan-out (including the library prefetch) to
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/// those servers. Returns the ids of servers whose hub fetch succeeded so
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/// callers do not cache transient per-server failures as loaded.
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Future<HubAggregationResult> getHubsFromAllServers({
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int? limit,
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Set<String>? hiddenLibraryKeys,
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bool useGlobalHubs = true,
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bool includePlaybackHubs = true,
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Set<String>? serverIds,
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}) async {
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final clients = _clientsFor(serverIds);
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if (clients.isEmpty) {
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appLogger.w('No online servers available for fetching hubs');
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return (hubs: const <MediaHub>[], succeededServerIds: const <String>{}, cancelledServerIds: const <String>{});
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}
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// Home layout needs the library list for every client: fallback backends
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// build all their rows from per-library hubs, and rich-hub backends
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// (Plex) need it to detect visible music libraries, whose hubs the
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// global-hub endpoint excludes. One `fetchLibraries` per server, served
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// from the per-backend API cache when warm.
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final libraries = useGlobalHubs
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? _groupLibrariesByServer((await getMediaLibrariesFromAllServers(serverIds: serverIds)).libraries)
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: null;
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final cancelledServerIds = <String>{};
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final futures = clients.entries.map((entry) async {
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final serverId = entry.key;
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final client = entry.value;
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try {
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final serverLibraries = libraries?[serverId];
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final shouldUseGlobalHubs = useGlobalHubs && client.capabilities.richHubs;
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final hubItemLimit = limit ?? defaultHubPreviewLimit;
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final hubs = shouldUseGlobalHubs
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? [
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...await client.fetchGlobalHubs(limit: hubItemLimit, includePlaybackHubs: includePlaybackHubs),
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// Plex's promoted/global hub endpoint never includes music
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// libraries — append their per-library hubs so music rows
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// reach home. No-op (zero extra calls) without a visible
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// music library.
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...await _fetchLibraryHubsForClient(
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client,
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limit: hubItemLimit,
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hiddenLibraryKeys: hiddenLibraryKeys,
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includePlaybackHubs: includePlaybackHubs,
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libraries: serverLibraries ?? const [],
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kinds: const {MediaKind.artist},
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),
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]
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: await _fetchLibraryHubsForClient(
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client,
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limit: hubItemLimit,
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hiddenLibraryKeys: hiddenLibraryKeys,
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includePlaybackHubs: includePlaybackHubs,
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libraries: useGlobalHubs ? serverLibraries : null,
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);
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return (
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serverId: serverId,
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hubs: _postProcessHubs(hubs, serverId: ServerId(serverId), hiddenLibraryKeys: hiddenLibraryKeys),
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);
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} catch (e, stackTrace) {
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if (_isCancellation(e)) cancelledServerIds.add(serverId);
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appLogger.e('Failed to fetch hubs from server $serverId', error: e, stackTrace: stackTrace);
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return (serverId: null, hubs: <MediaHub>[]);
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}
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});
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final results = await Future.wait(futures);
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final succeededServerIds = {
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for (final result in results)
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if (result.serverId != null) result.serverId!,
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};
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final all = <MediaHub>[];
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for (final result in results) {
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all.addAll(result.hubs);
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}
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final hubs = limit != null && limit < all.length ? all.sublist(0, limit) : all;
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return (hubs: hubs, succeededServerIds: succeededServerIds, cancelledServerIds: cancelledServerIds);
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}
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/// Per-library hub fetch for a single client. Filters to visible libraries
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/// of [kinds] (movie/show/clip/artist by default — clip covers Jellyfin
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/// musicvideos/homevideos, #1476; artist brings music rows to home) and
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/// concatenates the results. The rich-hub music append passes
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/// `{MediaKind.artist}` to fetch only what the global endpoint misses.
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Future<List<MediaHub>> _fetchLibraryHubsForClient(
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MediaServerClient client, {
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required int limit,
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Set<String>? hiddenLibraryKeys,
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required bool includePlaybackHubs,
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List<MediaLibrary>? libraries,
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Set<MediaKind> kinds = const {MediaKind.movie, MediaKind.show, MediaKind.clip, MediaKind.artist},
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}) async {
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final libs = libraries ?? await client.fetchLibraries();
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final visible = libs.where((l) {
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if (!kinds.contains(l.kind)) return false;
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if (l.hidden) return false;
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|
if (hiddenLibraryKeys != null && hiddenLibraryKeys.contains(l.globalKey)) return false;
|
|
return true;
|
|
}).toList();
|
|
|
|
const concurrency = 3;
|
|
final all = <MediaHub>[];
|
|
for (var start = 0; start < visible.length; start += concurrency) {
|
|
final batch = visible.skip(start).take(concurrency);
|
|
final results = await Future.wait(
|
|
batch.map((l) async {
|
|
try {
|
|
return await client.fetchLibraryHubs(
|
|
l.id,
|
|
libraryName: l.title,
|
|
limit: limit,
|
|
includePlaybackHubs: includePlaybackHubs,
|
|
libraryKind: l.kind,
|
|
);
|
|
} catch (e, st) {
|
|
appLogger.e('Failed to fetch library hubs for ${l.globalKey}', error: e, stackTrace: st);
|
|
return <MediaHub>[];
|
|
}
|
|
}),
|
|
);
|
|
for (final list in results) {
|
|
all.addAll(list);
|
|
}
|
|
}
|
|
return all;
|
|
}
|
|
|
|
/// Filter hidden-library items and drop empty hubs.
|
|
List<MediaHub> _postProcessHubs(List<MediaHub> hubs, {required ServerId serverId, Set<String>? hiddenLibraryKeys}) {
|
|
var filtered = hubs;
|
|
if (hiddenLibraryKeys != null && hiddenLibraryKeys.isNotEmpty) {
|
|
filtered = filtered
|
|
.map((hub) {
|
|
final filteredItems = hub.items.where((item) {
|
|
final libraryId = item.libraryId;
|
|
if (libraryId == null) return true;
|
|
final globalKey = buildGlobalKey(ServerId(serverId), libraryId);
|
|
return !hiddenLibraryKeys.contains(globalKey);
|
|
}).toList();
|
|
if (filteredItems.isEmpty) return null;
|
|
return hub.copyWith(items: filteredItems, size: filteredItems.length);
|
|
})
|
|
.whereType<MediaHub>()
|
|
.toList();
|
|
}
|
|
return filtered;
|
|
}
|
|
|
|
/// Search across all online servers (Plex + Jellyfin). Returns neutral
|
|
/// [MediaItem]s.
|
|
Future<List<MediaItem>> searchAcrossServers(String query, {int? limit}) async {
|
|
if (query.trim().isEmpty) {
|
|
return [];
|
|
}
|
|
|
|
final clients = _serverManager.onlineClients;
|
|
if (clients.isEmpty) return [];
|
|
|
|
final resultLimit = limit ?? defaultMediaSearchLimit;
|
|
final fetchLimit = resultLimit < defaultMediaSearchLimit ? defaultMediaSearchLimit : resultLimit;
|
|
|
|
final futures = clients.entries.map((entry) async {
|
|
final client = entry.value;
|
|
try {
|
|
return await client.searchItems(query, limit: fetchLimit);
|
|
} catch (e, st) {
|
|
appLogger.e('Search failed on ${entry.key}', error: e, stackTrace: st);
|
|
return <MediaItem>[];
|
|
}
|
|
});
|
|
|
|
final allResults = (await Future.wait(futures)).expand((l) => l).toList();
|
|
final result = rankMediaSearchResults(allResults, query, limit: resultLimit);
|
|
|
|
appLogger.i('Found ${result.length} search results across all servers');
|
|
|
|
return result;
|
|
}
|
|
|
|
/// Reverse external-id lookup fanned out to every online server (see
|
|
/// [MediaServerClient.findByExternalIds]). One request wave per tap on an
|
|
/// Explore catalog item; per-server failures are logged and skipped.
|
|
Future<List<MediaItem>> findByExternalIdsAcrossServers(
|
|
ExternalIds ids, {
|
|
required MediaKind kind,
|
|
String? title,
|
|
int? year,
|
|
}) async {
|
|
if (!ids.hasAny) return [];
|
|
final clients = _serverManager.onlineClients;
|
|
if (clients.isEmpty) return [];
|
|
|
|
final futures = clients.entries.map((entry) async {
|
|
try {
|
|
return await entry.value.findByExternalIds(ids, kind: kind, title: title, year: year);
|
|
} catch (e, st) {
|
|
appLogger.w('External-id lookup failed on ${entry.key}', error: e, stackTrace: st);
|
|
return null;
|
|
}
|
|
});
|
|
|
|
return (await Future.wait(futures)).nonNulls.toList();
|
|
}
|
|
|
|
/// Group libraries by server (internal aggregation helper).
|
|
Map<String, List<MediaLibrary>> _groupLibrariesByServer(List<MediaLibrary> libraries) {
|
|
final grouped = <String, List<MediaLibrary>>{};
|
|
|
|
for (final library in libraries) {
|
|
final serverId = library.serverId;
|
|
if (serverId != null) {
|
|
grouped.putIfAbsent(serverId, () => []).add(library);
|
|
}
|
|
}
|
|
|
|
return grouped;
|
|
}
|
|
}
|