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feat(jellyfin): lazily page recently added hubs

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close #1611
This commit is contained in:
edde746
2026-07-24 20:29:21 +02:00
parent d6b24c3e07
commit 102ef46d00
6 changed files with 225 additions and 48 deletions
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lib/mixins/paginated_item_loader.dart
+13
View File
@@ -28,6 +28,7 @@ mixin PaginatedItemLoader<T, W extends StatefulWidget> on State<W> {
final Set<int> _loadingRanges = {};
AbortController? _cancelToken;
Object? _paginationError;
/// Monotonic generation — bumped on reset/dispose so stale fetches are
/// discarded instead of mutating state from a prior load.
@@ -37,6 +38,8 @@ mixin PaginatedItemLoader<T, W extends StatefulWidget> on State<W> {
Timer? _retryTimer;
bool _visibleRangeLoading = false;
DateTime? _lastEagerPrefetch;
Object? get paginationError => _paginationError;
bool get isPaginationLoading => _loadingRanges.isNotEmpty;
/// Re-invoked by the retry timer. Most recent range-load args.
VoidCallback? _scheduledRetry;
@@ -49,6 +52,10 @@ mixin PaginatedItemLoader<T, W extends StatefulWidget> on State<W> {
/// Override for image prefetch, syncing a base-class `items` list, etc.
void onPageLoaded(int _, List<T> _) {}
/// Hook fired when a lazy page starts or finishes loading, or fails.
/// Override when the surrounding UI exposes loading or retry state.
void onPaginationStateChanged() {}
/// Synchronously clear pagination state and bump the generation counter.
/// Call from inside the subclass's `setState` before awaiting
/// [loadInitialPage]. Aborts any in-flight fetches from the previous load.
@@ -61,6 +68,7 @@ mixin PaginatedItemLoader<T, W extends StatefulWidget> on State<W> {
_visibleRangeLoading = false;
_lastEagerPrefetch = null;
_scheduledRetry = null;
_paginationError = null;
loadedItems.clear();
_loadingRanges.clear();
totalSize = 0;
@@ -265,6 +273,7 @@ mixin PaginatedItemLoader<T, W extends StatefulWidget> on State<W> {
_retryTimer?.cancel();
_retryTimer = null;
_loadingRanges.clear();
_paginationError = null;
_scheduledRetry = null;
}
@@ -276,6 +285,8 @@ mixin PaginatedItemLoader<T, W extends StatefulWidget> on State<W> {
final indices = List.generate(clampedSize, (i) => start + i);
if (indices.every((i) => _loadingRanges.contains(i) || loadedItems.containsKey(i))) return true;
_loadingRanges.addAll(indices);
_paginationError = null;
onPaginationStateChanged();
final generation = _requestId;
@@ -295,6 +306,7 @@ mixin PaginatedItemLoader<T, W extends StatefulWidget> on State<W> {
return true;
} catch (e) {
if (e is MediaServerHttpException && e.type == MediaServerHttpErrorType.cancelled) return false;
_paginationError = e;
_retryCount++;
final delay = Duration(milliseconds: 500 * (1 << _retryCount.clamp(0, 4)));
_retryTimer?.cancel();
@@ -304,6 +316,7 @@ mixin PaginatedItemLoader<T, W extends StatefulWidget> on State<W> {
return false;
} finally {
_loadingRanges.removeAll(indices);
onPaginationStateChanged();
}
}
}
lib/screens/hub_detail_screen.dart
+106 -18
View File
@@ -16,6 +16,7 @@ import '../utils/app_logger.dart';
import '../utils/continuation_pagination_coordinator.dart';
import '../utils/error_message_utils.dart';
import '../utils/platform_detector.dart';
import '../utils/media_server_http_client.dart';
import '../utils/plex_library_section_utils.dart';
import '../utils/provider_extensions.dart';
import '../widgets/focusable_media_card.dart';
@@ -28,6 +29,7 @@ import '../focus/focusable_action_bar.dart';
import '../focus/focusable_button.dart';
import '../focus/key_event_utils.dart';
import '../mixins/grid_focus_node_mixin.dart';
import '../mixins/paginated_item_loader.dart';
import 'libraries/sort_bottom_sheet.dart';
import 'libraries/content_state_builder.dart';
import '../mixins/refreshable.dart';
@@ -56,7 +58,7 @@ class HubDetailScreen extends StatefulWidget {
}
class _HubDetailScreenState extends State<HubDetailScreen>
with Refreshable, GridFocusNodeMixin, FocusableDetailScreenMixin {
with Refreshable, GridFocusNodeMixin, FocusableDetailScreenMixin, PaginatedItemLoader<MediaItem, HubDetailScreen> {
static const int _pageSize = 200;
List<MediaItem> _items = [];
@@ -67,6 +69,7 @@ class _HubDetailScreenState extends State<HubDetailScreen>
bool _isLoading = false;
String? _errorMessage;
bool _replaceContinuationItems = false;
bool _usesPaginatedLoader = false;
late final ContinuationPaginationCoordinator<MediaItem> _continuation = ContinuationPaginationCoordinator<MediaItem>(
loadPage: _fetchContinuationPage,
@@ -111,6 +114,7 @@ class _HubDetailScreenState extends State<HubDetailScreen>
@override
void initState() {
super.initState();
scrollController.addListener(_maybeLoadNextHubPage);
_items = widget.hub.items;
_filteredItems = widget.hub.items;
if (widget.hub.more) {
@@ -122,6 +126,8 @@ class _HubDetailScreenState extends State<HubDetailScreen>
@override
void dispose() {
scrollController.removeListener(_maybeLoadNextHubPage);
disposePagination();
_continuation.dispose();
_continuationRetryFocusNode.dispose();
disposeFocusResources();
@@ -269,34 +275,70 @@ class _HubDetailScreenState extends State<HubDetailScreen>
});
}
bool _shouldUsePaginatedLoader(MediaServerClient client) =>
client.backend == MediaBackend.jellyfin && widget.hub.id.endsWith('.recent');
@override
Future<LibraryPage<MediaItem>> fetchPage(int start, int size, AbortController? abort) async {
final serverId = widget.hub.serverId;
final client = serverId == null ? null : context.tryGetMediaClientForServer(ServerId(serverId));
if (client == null) throw StateError('No media client available for paginated hub');
return client.fetchMoreHubItemsPage(widget.hub.id, start: start, size: size, abort: abort);
}
@override
void onPageLoaded(int start, List<MediaItem> items) {
if (!_usesPaginatedLoader || start == 0 || !mounted) return;
setState(() {
_items = List.of(_items)..addAll(items);
_filteredItems = List.of(_items);
});
_applySort();
_scheduleNextHubPageCheck();
}
@override
void onPaginationStateChanged() {
if (mounted) setState(() {});
}
Future<void> _loadMoreItems() async {
if (_isLoading) return;
final serverId = widget.hub.serverId;
if (widget.loadItems == null && serverId == null) {
final loader = widget.loadItems;
if (loader == null && serverId == null) {
appLogger.w('Hub has no serverId; cannot load more items for ${widget.hub.id}');
return;
}
final client = serverId == null ? null : context.tryGetMediaClientForServer(ServerId(serverId));
final usesCustomLoader = loader != null;
_usesPaginatedLoader = !usesCustomLoader && client != null && _shouldUsePaginatedLoader(client);
setState(() {
_isLoading = true;
_errorMessage = null;
if (_usesPaginatedLoader) resetPaginationState();
});
try {
List<MediaItem> items = const [];
var totalCount = 0;
var loadedCount = 0;
var usesCustomLoader = false;
MediaServerClient? client;
var initialPageApplied = true;
final applied = await _continuation.runNewGeneration(() async {
final loader = widget.loadItems;
usesCustomLoader = loader != null;
client = serverId == null ? null : context.tryGetMediaClientForServer(ServerId(serverId));
if (loader == null) {
if (_usesPaginatedLoader) {
final result = await loadInitialPageWithStatus(_pageSize);
initialPageApplied = result.applied;
if (!result.applied) return;
items = result.page.items;
totalCount = result.page.totalCount;
loadedCount = result.page.items.length;
} else if (loader == null) {
final page = client == null
? const LibraryPage<MediaItem>(items: [], totalCount: 0)
: await client!.fetchMoreHubItemsPage(widget.hub.id, start: 0, size: _pageSize);
: await client.fetchMoreHubItemsPage(widget.hub.id, start: 0, size: _pageSize);
items = _applySectionFilter(page.items);
totalCount = page.totalCount;
loadedCount = page.items.length;
@@ -307,7 +349,7 @@ class _HubDetailScreenState extends State<HubDetailScreen>
}
});
if (!mounted || !applied) return;
if (!mounted || !applied || !initialPageApplied) return;
setState(() {
_items = List.of(items);
_filteredItems = List.of(items);
@@ -315,14 +357,16 @@ class _HubDetailScreenState extends State<HubDetailScreen>
});
_applySort();
if (!usesCustomLoader && client != null && loadedCount < totalCount) {
_replaceContinuationItems = client!.backend == MediaBackend.plex;
if (!usesCustomLoader && !_usesPaginatedLoader && client != null && loadedCount < totalCount) {
_replaceContinuationItems = client.backend == MediaBackend.plex;
if (_replaceContinuationItems) {
_continuation.setContinuation(startIndex: 0, totalCount: 1);
} else {
_continuation.setContinuation(startIndex: loadedCount, totalCount: totalCount);
}
unawaited(_continuation.loadRemaining());
} else if (_usesPaginatedLoader && loadedCount < totalCount) {
_scheduleNextHubPageCheck();
}
appLogger.d('Loaded ${items.length} items for hub: ${widget.hub.title}');
@@ -370,13 +414,51 @@ class _HubDetailScreenState extends State<HubDetailScreen>
_applySort();
}
void _scheduleNextHubPageCheck() {
WidgetsBinding.instance.addPostFrameCallback((_) {
if (mounted) _maybeLoadNextHubPage();
});
}
void _maybeLoadNextHubPage() {
if (!_usesPaginatedLoader ||
loadedItems.length >= totalSize ||
isPaginationLoading ||
paginationError != null ||
!scrollController.hasClients) {
return;
}
final position = scrollController.position;
if (position.extentAfter <= position.viewportDimension) {
_requestNextHubPage();
}
}
void _requestNextHubPage() {
if (!_usesPaginatedLoader || loadedItems.length >= totalSize || isPaginationLoading || paginationError != null) {
return;
}
ensureIndexLoaded(loadedItems.length, pageSize: _pageSize);
}
void _handleGridItemFocusChange(int index, bool hasFocus, {required bool isLastRow}) {
trackGridItemFocus(index, hasFocus);
if (hasFocus && isLastRow) _requestNextHubPage();
}
void _handleContinuationStateChanged() {
if (mounted) {
setState(() {});
}
}
void _retryHubContinuation() => unawaited(_continuation.retry());
void _retryHubContinuation() {
if (_usesPaginatedLoader) {
ensureIndexLoaded(loadedItems.length, pageSize: _pageSize);
} else {
unawaited(_continuation.retry());
}
}
List<MediaItem> _applySectionFilter(List<MediaItem> items) {
final sectionFilter = int.tryParse(widget.hub.libraryId ?? '');
@@ -408,8 +490,11 @@ class _HubDetailScreenState extends State<HubDetailScreen>
unawaited(_loadMoreItems());
}
Object? get _pageLoadError => _usesPaginatedLoader ? paginationError : _continuation.error;
bool get _isLoadingPage => _usesPaginatedLoader ? isPaginationLoading : _continuation.isLoading;
Widget _buildContinuationStatusSliver() {
final exception = _continuation.error;
final exception = _pageLoadError;
final error = exception == null ? null : t.messages.errorLoading(error: exception.toString());
return SliverToBoxAdapter(
child: Padding(
@@ -530,13 +615,16 @@ class _HubDetailScreenState extends State<HubDetailScreen>
usesContinueWatchingAction: widget.usesContinueWatchingAction,
onNavigateUp: position.isFirstRow ? navigateToAppBar : null,
onNavigateDown:
_continuation.error != null &&
position.index >= position.itemCount - position.columnCount
_pageLoadError != null && position.index >= position.itemCount - position.columnCount
? _continuationRetryFocusNode.requestFocus
: null,
onNavigateLeft: position.isGrid && position.isFirstColumn ? () {} : null,
onBack: handleBackFromContent,
onFocusChange: (hasFocus) => trackGridItemFocus(index, hasFocus),
onFocusChange: (hasFocus) => _handleGridItemFocusChange(
index,
hasFocus,
isLastRow: position.index >= position.itemCount - position.columnCount,
),
mixedHubContext: isMixedHub,
fullBleedImage: fullCardLayout && position.isGrid,
);
@@ -544,7 +632,7 @@ class _HubDetailScreenState extends State<HubDetailScreen>
);
},
),
if (_filteredItems.isNotEmpty && (_continuation.isLoading || _continuation.error != null))
if (_filteredItems.isNotEmpty && (_isLoadingPage || _pageLoadError != null))
_buildContinuationStatusSliver(),
],
),
lib/services/jellyfin_client/parts/browse.dart
+29 -14
View File
@@ -1511,13 +1511,12 @@ mixin _JellyfinBrowseMethods on MediaServerCacheMixin {
].where((h) => h.items.isNotEmpty).toList();
}
/// Re-run the synthetic hub query without the preview limit so the
/// hub-detail screen can render the full list. Branches on the
/// identifier emitted by [fetchGlobalHubs] / [fetchLibraryHubs]:
/// `home.recent` / `library.{id}.recent` → Latest, `*.latestalbums` →
/// Latest with the slim music album fields, `*.continue` → Resume,
/// `*.nextup` → NextUp, `*.recentlyplayed` / `*.mostplayed` → the music
/// played-track queries. Unknown ids return an empty list.
/// Expand a synthetic hub so the detail screen can render beyond its
/// preview. Recently Added uses the pageable Items endpoint with the same
/// date-created ordering and media types as Jellyfin's Latest query.
/// Latest Albums retains the grouped, single-page Latest endpoint.
/// Continue Watching, Next Up, Recently Played, and Most Played use their
/// native pageable endpoints. Unknown ids return an empty list.
@override
Future<List<MediaItem>> fetchMoreHubItems(String hubId, {int? limit}) async {
try {
@@ -1551,19 +1550,35 @@ mixin _JellyfinBrowseMethods on MediaServerCacheMixin {
final tail = hubId.split('.').last;
switch (tail) {
case 'recent':
return _safeFetchMediaPage(
'/Items',
{
'userId': connection.userId,
'ParentId': ?parentId,
'Recursive': 'true',
'StartIndex': offset.toString(),
'Limit': effectiveLimit,
'EnableTotalRecordCount': 'true',
'IncludeItemTypes': 'Movie,Series,Episode,Video,MusicVideo,Photo',
'SortBy': 'DateCreated,SortName,ProductionYear',
'SortOrder': 'Descending,Descending,Descending',
'Fields': _browseFields,
...jellyfinImageQueryParameters,
},
offset: offset,
requestedSize: pageSize,
abort: abort,
);
case 'latestalbums':
// Jellyfin's Latest endpoint has a Limit but no StartIndex. Expose it
// as one bounded page so callers don't infer endless fake pages.
// Music album rows keep the slim fields their preview row used
// (see [_musicAlbumRowFields]).
// Latest groups music into albums but does not expose StartIndex.
if (offset > 0) return LibraryPage<MediaItem>(items: const [], totalCount: offset, offset: offset);
return _safeFetchMediaPage(
'/Users/${_segment(connection.userId)}/Items/Latest',
{
'Limit': effectiveLimit,
'Fields': tail == 'latestalbums' ? _musicAlbumRowFields : _browseFields,
if (tail == 'latestalbums') 'EnableUserData': 'false',
if (parentId != null) 'ParentId': parentId else 'IncludeItemTypes': 'Movie,Series,Episode',
'Fields': _musicAlbumRowFields,
'EnableUserData': 'false',
'ParentId': ?parentId,
...jellyfinImageQueryParameters,
},
offset: offset,