feat: manual stack assets (#4198)

mobile/lib/modules/asset_viewer/providers/asset_stack.provider.dart

@@ -0,0 +1,50 @@
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/shared/models/asset.dart';
+import 'package:immich_mobile/shared/providers/db.provider.dart';
+import 'package:isar/isar.dart';
+
+class AssetStackNotifier extends StateNotifier<List<Asset>> {
+  final Asset _asset;
+  final Ref _ref;
+
+  AssetStackNotifier(
+    this._asset,
+    this._ref,
+  ) : super([]) {
+    fetchStackChildren();
+  }
+
+  void fetchStackChildren() async {
+    if (mounted) {
+      state = await _ref.read(assetStackProvider(_asset).future);
+    }
+  }
+
+  removeChild(int index) {
+    if (index < state.length) {
+      state.removeAt(index);
+    }
+  }
+}
+
+final assetStackStateProvider = StateNotifierProvider.autoDispose
+    .family<AssetStackNotifier, List<Asset>, Asset>(
+  (ref, asset) => AssetStackNotifier(asset, ref),
+);
+
+final assetStackProvider =
+    FutureProvider.autoDispose.family<List<Asset>, Asset>((ref, asset) async {
+  // Guard [local asset]
+  if (asset.remoteId == null) {
+    return [];
+  }
+
+  return await ref
+      .watch(dbProvider)
+      .assets
+      .filter()
+      .isArchivedEqualTo(false)
+      .isTrashedEqualTo(false)
+      .stackParentIdEqualTo(asset.remoteId)
+      .findAll();
+});

mobile/lib/modules/asset_viewer/providers/render_list.provider.dart

@@ -3,6 +3,7 @@ import 'package:immich_mobile/modules/home/ui/asset_grid/asset_grid_data_structu
 import 'package:immich_mobile/modules/settings/providers/app_settings.provider.dart';
 import 'package:immich_mobile/modules/settings/services/app_settings.service.dart';
 import 'package:immich_mobile/shared/models/asset.dart';
+import 'package:isar/isar.dart';
 
 final renderListProvider =
     FutureProvider.family<RenderList, List<Asset>>((ref, assets) {
@@ -13,3 +14,19 @@ final renderListProvider =
     GroupAssetsBy.values[settings.getSetting(AppSettingsEnum.groupAssetsBy)],
   );
 });
+
+final renderListQueryProvider = StreamProvider.family<RenderList,
+    QueryBuilder<Asset, Asset, QAfterSortBy>?>(
+  (ref, query) async* {
+    if (query == null) {
+      return;
+    }
+    final settings = ref.watch(appSettingsServiceProvider);
+    final groupBy = GroupAssetsBy
+        .values[settings.getSetting(AppSettingsEnum.groupAssetsBy)];
+    yield await RenderList.fromQuery(query, groupBy);
+    await for (final _ in query.watchLazy()) {
+      yield await RenderList.fromQuery(query, groupBy);
+    }
+  },
+);