Migrate Memory to use collection browser

app/lib/entity/album/cover_provider.dart

@@ -26,9 +26,6 @@ abstract class AlbumCoverProvider with EquatableMixin {
       case AlbumManualCoverProvider._type:
         return AlbumManualCoverProvider.fromJson(
             content.cast<String, dynamic>());
-      case AlbumMemoryCoverProvider._type:
-        return AlbumMemoryCoverProvider.fromJson(
-            content.cast<String, dynamic>());
       default:
         _log.shout("[fromJson] Unknown type: $type");
         throw ArgumentError.value(type, "type");
@@ -154,38 +151,3 @@ class AlbumManualCoverProvider extends AlbumCoverProvider {
 
   static const _type = "manual";
 }
-
-/// Cover selected when building a Memory album
-@toString
-class AlbumMemoryCoverProvider extends AlbumCoverProvider {
-  AlbumMemoryCoverProvider({
-    required this.coverFile,
-  });
-
-  factory AlbumMemoryCoverProvider.fromJson(JsonObj json) {
-    return AlbumMemoryCoverProvider(
-      coverFile:
-          FileDescriptor.fromJson(json["coverFile"].cast<String, dynamic>()),
-    );
-  }
-
-  @override
-  String toString() => _$toString();
-
-  @override
-  getCover(Album album) => coverFile;
-
-  @override
-  get props => [
-        coverFile,
-      ];
-
-  @override
-  _toContentJson() => {
-        "coverFile": coverFile.toFdJson(),
-      };
-
-  final FileDescriptor coverFile;
-
-  static const _type = "memory";
-}

app/lib/entity/album/cover_provider.g.dart

@@ -30,10 +30,3 @@ extension _$AlbumManualCoverProviderToString on AlbumManualCoverProvider {
     return "AlbumManualCoverProvider {coverFile: ${coverFile.fdPath}}";
   }
 }
-
-extension _$AlbumMemoryCoverProviderToString on AlbumMemoryCoverProvider {
-  String _$toString() {
-    // ignore: unnecessary_string_interpolations
-    return "AlbumMemoryCoverProvider {coverFile: ${coverFile.fdPath}}";
-  }
-}

app/lib/entity/album/provider.dart

@@ -284,28 +284,3 @@ abstract class AlbumSmartProvider extends AlbumProviderBase {
     throw UnimplementedError();
   }
 }
-
-/// Memory album is created based on dates
-@ToString(extraParams: r"{bool isDeep = false}")
-class AlbumMemoryProvider extends AlbumSmartProvider {
-  AlbumMemoryProvider({
-    required this.year,
-    required this.month,
-    required this.day,
-  }) : super(latestItemTime: DateTime(year, month, day));
-
-  @override
-  String toString({bool isDeep = false}) => _$toString(isDeep: isDeep);
-
-  @override
-  get props => [
-        ...super.props,
-        year,
-        month,
-        day,
-      ];
-
-  final int year;
-  final int month;
-  final int day;
-}

app/lib/entity/album/provider.g.dart

@@ -37,10 +37,3 @@ extension _$AlbumTagProviderToString on AlbumTagProvider {
     return "AlbumTagProvider {latestItemTime: $latestItemTime, tags: ${tags.map((t) => t.displayName).toReadableString()}}";
   }
 }
-
-extension _$AlbumMemoryProviderToString on AlbumMemoryProvider {
-  String _$toString({bool isDeep = false}) {
-    // ignore: unnecessary_string_interpolations
-    return "AlbumMemoryProvider {latestItemTime: $latestItemTime, year: $year, month: $month, day: $day}";
-  }
-}

app/lib/entity/collection.dart

@@ -1,4 +1,5 @@
 import 'package:copy_with/copy_with.dart';
+import 'package:equatable/equatable.dart';
 import 'package:nc_photos/entity/collection_item/sorter.dart';
 import 'package:nc_photos/entity/collection_item/util.dart';
 import 'package:to_string/to_string.dart';
@@ -8,7 +9,7 @@ part 'collection.g.dart';
 /// Describe a group of items
 @genCopyWith
 @toString
-class Collection {
+class Collection with EquatableMixin {
   const Collection({
     required this.name,
     required this.contentProvider,
@@ -40,11 +41,25 @@ class Collection {
   CollectionItemSort get itemSort => contentProvider.itemSort;
 
   /// See [CollectionContentProvider.getCoverUrl]
-  String? getCoverUrl(int width, int height) =>
-      contentProvider.getCoverUrl(width, height);
+  String? getCoverUrl(
+    int width,
+    int height, {
+    bool? isKeepAspectRatio,
+  }) =>
+      contentProvider.getCoverUrl(
+        width,
+        height,
+        isKeepAspectRatio: isKeepAspectRatio,
+      );
 
   CollectionSorter getSorter() => CollectionSorter.fromSortType(itemSort);
 
+  @override
+  List<Object?> get props => [
+        name,
+        contentProvider,
+      ];
+
   final String name;
   final CollectionContentProvider contentProvider;
 }
@@ -65,7 +80,7 @@ enum CollectionCapability {
 }
 
 /// Provide the actual content of a collection
-abstract class CollectionContentProvider {
+abstract class CollectionContentProvider with EquatableMixin {
   const CollectionContentProvider();
 
   /// Unique FourCC of this provider type
@@ -95,5 +110,11 @@ abstract class CollectionContentProvider {
   ///
   /// The [width] and [height] are provided as a hint only, implementations are
   /// free to ignore them if it's not supported
-  String? getCoverUrl(int width, int height);
+  ///
+  /// [isKeepAspectRatio] is only a hint and implementations may ignore it
+  String? getCoverUrl(
+    int width,
+    int height, {
+    bool? isKeepAspectRatio,
+  });
 }

app/lib/entity/collection/adapter.dart

@@ -4,11 +4,13 @@ import 'package:nc_photos/di_container.dart';
 import 'package:nc_photos/entity/collection.dart';
 import 'package:nc_photos/entity/collection/adapter/album.dart';
 import 'package:nc_photos/entity/collection/adapter/location_group.dart';
+import 'package:nc_photos/entity/collection/adapter/memory.dart';
 import 'package:nc_photos/entity/collection/adapter/nc_album.dart';
 import 'package:nc_photos/entity/collection/adapter/person.dart';
 import 'package:nc_photos/entity/collection/adapter/tag.dart';
 import 'package:nc_photos/entity/collection/content_provider/album.dart';
 import 'package:nc_photos/entity/collection/content_provider/location_group.dart';
+import 'package:nc_photos/entity/collection/content_provider/memory.dart';
 import 'package:nc_photos/entity/collection/content_provider/nc_album.dart';
 import 'package:nc_photos/entity/collection/content_provider/person.dart';
 import 'package:nc_photos/entity/collection/content_provider/tag.dart';
@@ -29,6 +31,8 @@ abstract class CollectionAdapter {
         return CollectionAlbumAdapter(c, account, collection);
       case CollectionLocationGroupProvider:
         return CollectionLocationGroupAdapter(c, account, collection);
+      case CollectionMemoryProvider:
+        return CollectionMemoryAdapter(c, account, collection);
       case CollectionNcAlbumProvider:
         return CollectionNcAlbumAdapter(c, account, collection);
       case CollectionPersonProvider:

app/lib/entity/collection/adapter/memory.dart

@@ -0,0 +1,59 @@
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/di_container.dart';
+import 'package:nc_photos/entity/collection.dart';
+import 'package:nc_photos/entity/collection/adapter.dart';
+import 'package:nc_photos/entity/collection/adapter/read_only_adapter.dart';
+import 'package:nc_photos/entity/collection/content_provider/memory.dart';
+import 'package:nc_photos/entity/collection_item.dart';
+import 'package:nc_photos/entity/collection_item/basic_item.dart';
+import 'package:nc_photos/entity/file/data_source.dart';
+import 'package:nc_photos/entity/file_util.dart' as file_util;
+import 'package:nc_photos/use_case/list_location_file.dart';
+
+class CollectionMemoryAdapter
+    with CollectionReadOnlyAdapter
+    implements CollectionAdapter {
+  CollectionMemoryAdapter(this._c, this.account, this.collection)
+      : assert(require(_c)),
+        _provider = collection.contentProvider as CollectionMemoryProvider;
+
+  static bool require(DiContainer c) => ListLocationFile.require(c);
+
+  @override
+  Stream<List<CollectionItem>> listItem() async* {
+    final date = DateTime(_provider.year, _provider.month, _provider.day);
+    final dayRange = _c.pref.getMemoriesRangeOr();
+    final from = date.subtract(Duration(days: dayRange));
+    final to = date.add(Duration(days: dayRange + 1));
+    final files = await FileSqliteDbDataSource(_c).listByDate(
+        account, from.millisecondsSinceEpoch, to.millisecondsSinceEpoch);
+    yield files
+        .where((f) => file_util.isSupportedFormat(f))
+        .map((f) => BasicCollectionFileItem(f))
+        .toList();
+  }
+
+  @override
+  Future<CollectionItem> adaptToNewItem(CollectionItem original) async {
+    if (original is CollectionFileItem) {
+      return BasicCollectionFileItem(original.file);
+    } else {
+      throw UnsupportedError("Unsupported type: ${original.runtimeType}");
+    }
+  }
+
+  @override
+  Future<void> remove() {
+    throw UnsupportedError("Operation not supported");
+  }
+
+  @override
+  bool isPermitted(CollectionCapability capability) =>
+      _provider.capabilities.contains(capability);
+
+  final DiContainer _c;
+  final Account account;
+  final Collection collection;
+
+  final CollectionMemoryProvider _provider;
+}

app/lib/entity/collection/content_provider/album.dart

@@ -1,4 +1,5 @@
 import 'package:copy_with/copy_with.dart';
+import 'package:equatable/equatable.dart';
 import 'package:nc_photos/account.dart';
 import 'package:nc_photos/api/api_util.dart' as api_util;
 import 'package:nc_photos/entity/album.dart';
@@ -12,7 +13,9 @@ part 'album.g.dart';
 /// Album provided by our app
 @genCopyWith
 @toString
-class CollectionAlbumProvider implements CollectionContentProvider {
+class CollectionAlbumProvider
+    with EquatableMixin
+    implements CollectionContentProvider {
   const CollectionAlbumProvider({
     required this.account,
     required this.album,
@@ -64,7 +67,11 @@ class CollectionAlbumProvider implements CollectionContentProvider {
   CollectionItemSort get itemSort => album.sortProvider.toCollectionItemSort();
 
   @override
-  String? getCoverUrl(int width, int height) {
+  String? getCoverUrl(
+    int width,
+    int height, {
+    bool? isKeepAspectRatio,
+  }) {
     final fd = album.coverProvider.getCover(album);
     if (fd == null) {
       return null;
@@ -74,11 +81,14 @@ class CollectionAlbumProvider implements CollectionContentProvider {
         fd.fdId,
         width: width,
         height: height,
-        isKeepAspectRatio: false,
+        isKeepAspectRatio: isKeepAspectRatio ?? false,
       );
     }
   }
 
+  @override
+  List<Object?> get props => [account, album];
+
   final Account account;
   final Album album;
 }

app/lib/entity/collection/content_provider/location_group.dart

@@ -1,10 +1,13 @@
+import 'package:equatable/equatable.dart';
 import 'package:nc_photos/account.dart';
 import 'package:nc_photos/api/api_util.dart' as api_util;
 import 'package:nc_photos/entity/collection.dart';
 import 'package:nc_photos/entity/collection_item/util.dart';
 import 'package:nc_photos/use_case/list_location_group.dart';
 
-class CollectionLocationGroupProvider implements CollectionContentProvider {
+class CollectionLocationGroupProvider
+    with EquatableMixin
+    implements CollectionContentProvider {
   const CollectionLocationGroupProvider({
     required this.account,
     required this.location,
@@ -29,16 +32,23 @@ class CollectionLocationGroupProvider implements CollectionContentProvider {
   CollectionItemSort get itemSort => CollectionItemSort.dateDescending;
 
   @override
-  String? getCoverUrl(int width, int height) {
+  String? getCoverUrl(
+    int width,
+    int height, {
+    bool? isKeepAspectRatio,
+  }) {
     return api_util.getFilePreviewUrlByFileId(
       account,
       location.latestFileId,
       width: width,
       height: height,
-      isKeepAspectRatio: false,
+      isKeepAspectRatio: isKeepAspectRatio ?? false,
     );
   }
 
+  @override
+  List<Object?> get props => [account, location];
+
   final Account account;
   final LocationGroup location;
 }

app/lib/entity/collection/content_provider/memory.dart

@@ -0,0 +1,68 @@
+import 'package:equatable/equatable.dart';
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/api/api_util.dart' as api_util;
+import 'package:nc_photos/entity/collection.dart';
+import 'package:nc_photos/entity/collection_item/util.dart';
+import 'package:nc_photos/entity/file_descriptor.dart';
+import 'package:nc_photos/object_extension.dart';
+import 'package:to_string/to_string.dart';
+
+part 'memory.g.dart';
+
+@toString
+class CollectionMemoryProvider
+    with EquatableMixin
+    implements CollectionContentProvider {
+  const CollectionMemoryProvider({
+    required this.account,
+    required this.year,
+    required this.month,
+    required this.day,
+    this.cover,
+  });
+
+  @override
+  String get fourCc => "MEMY";
+
+  @override
+  String get id => "$year-$month-$day";
+
+  @override
+  int? get count => null;
+
+  @override
+  DateTime get lastModified => DateTime(year, month, day);
+
+  @override
+  List<CollectionCapability> get capabilities => [];
+
+  @override
+  CollectionItemSort get itemSort => CollectionItemSort.dateDescending;
+
+  @override
+  String? getCoverUrl(
+    int width,
+    int height, {
+    bool? isKeepAspectRatio,
+  }) {
+    return cover?.run((cover) => api_util.getFilePreviewUrl(
+          account,
+          cover,
+          width: width,
+          height: height,
+          isKeepAspectRatio: isKeepAspectRatio ?? false,
+        ));
+  }
+
+  @override
+  String toString() => _$toString();
+
+  @override
+  List<Object?> get props => [account, year, month, day, cover];
+
+  final Account account;
+  final int year;
+  final int month;
+  final int day;
+  final FileDescriptor? cover;
+}

app/lib/entity/collection/content_provider/memory.g.dart

@@ -0,0 +1,14 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'memory.dart';
+
+// **************************************************************************
+// ToStringGenerator
+// **************************************************************************
+
+extension _$CollectionMemoryProviderToString on CollectionMemoryProvider {
+  String _$toString() {
+    // ignore: unnecessary_string_interpolations
+    return "CollectionMemoryProvider {account: $account, year: $year, month: $month, day: $day, cover: ${cover == null ? null : "${cover!.fdPath}"}}";
+  }
+}

app/lib/entity/collection/content_provider/nc_album.dart

@@ -1,5 +1,6 @@
 import 'package:clock/clock.dart';
 import 'package:copy_with/copy_with.dart';
+import 'package:equatable/equatable.dart';
 import 'package:nc_photos/account.dart';
 import 'package:nc_photos/api/api_util.dart' as api_util;
 import 'package:nc_photos/entity/collection.dart';
@@ -12,7 +13,9 @@ part 'nc_album.g.dart';
 /// Album provided by our app
 @genCopyWith
 @toString
-class CollectionNcAlbumProvider implements CollectionContentProvider {
+class CollectionNcAlbumProvider
+    with EquatableMixin
+    implements CollectionContentProvider {
   const CollectionNcAlbumProvider({
     required this.account,
     required this.album,
@@ -43,7 +46,11 @@ class CollectionNcAlbumProvider implements CollectionContentProvider {
   CollectionItemSort get itemSort => CollectionItemSort.dateDescending;
 
   @override
-  String? getCoverUrl(int width, int height) {
+  String? getCoverUrl(
+    int width,
+    int height, {
+    bool? isKeepAspectRatio,
+  }) {
     if (album.lastPhoto == null) {
       return null;
     } else {
@@ -52,11 +59,14 @@ class CollectionNcAlbumProvider implements CollectionContentProvider {
         album.lastPhoto!,
         width: width,
         height: height,
-        isKeepAspectRatio: false,
+        isKeepAspectRatio: isKeepAspectRatio ?? false,
       );
     }
   }
 
+  @override
+  List<Object?> get props => [account, album];
+
   final Account account;
   final NcAlbum album;
 }

app/lib/entity/collection/content_provider/person.dart

@@ -1,13 +1,16 @@
 import 'dart:math' as math;
 
 import 'package:clock/clock.dart';
+import 'package:equatable/equatable.dart';
 import 'package:nc_photos/account.dart';
 import 'package:nc_photos/api/api_util.dart' as api_util;
 import 'package:nc_photos/entity/collection.dart';
 import 'package:nc_photos/entity/collection_item/util.dart';
 import 'package:nc_photos/entity/person.dart';
 
-class CollectionPersonProvider implements CollectionContentProvider {
+class CollectionPersonProvider
+    with EquatableMixin
+    implements CollectionContentProvider {
   const CollectionPersonProvider({
     required this.account,
     required this.person,
@@ -32,11 +35,18 @@ class CollectionPersonProvider implements CollectionContentProvider {
   CollectionItemSort get itemSort => CollectionItemSort.dateDescending;
 
   @override
-  String? getCoverUrl(int width, int height) {
+  String? getCoverUrl(
+    int width,
+    int height, {
+    bool? isKeepAspectRatio,
+  }) {
     return api_util.getFacePreviewUrl(account, person.thumbFaceId,
         size: math.max(width, height));
   }
 
+  @override
+  List<Object?> get props => [account, person];
+
   final Account account;
   final Person person;
 }

app/lib/entity/collection/content_provider/tag.dart

@@ -1,10 +1,13 @@
 import 'package:clock/clock.dart';
+import 'package:equatable/equatable.dart';
 import 'package:nc_photos/account.dart';
 import 'package:nc_photos/entity/collection.dart';
 import 'package:nc_photos/entity/collection_item/util.dart';
 import 'package:nc_photos/entity/tag.dart';
 
-class CollectionTagProvider implements CollectionContentProvider {
+class CollectionTagProvider
+    with EquatableMixin
+    implements CollectionContentProvider {
   CollectionTagProvider({
     required this.account,
     required this.tags,
@@ -29,7 +32,15 @@ class CollectionTagProvider implements CollectionContentProvider {
   CollectionItemSort get itemSort => CollectionItemSort.dateDescending;
 
   @override
-  String? getCoverUrl(int width, int height) => null;
+  String? getCoverUrl(
+    int width,
+    int height, {
+    bool? isKeepAspectRatio,
+  }) =>
+      null;
+
+  @override
+  List<Object?> get props => [account, tags];
 
   final Account account;
   final List<Tag> tags;

app/lib/entity/nc_album.dart

@@ -1,4 +1,5 @@
 import 'package:copy_with/copy_with.dart';
+import 'package:equatable/equatable.dart';
 import 'package:nc_photos/account.dart';
 import 'package:np_common/string_extension.dart';
 import 'package:to_string/to_string.dart';
@@ -8,7 +9,7 @@ part 'nc_album.g.dart';
 /// Server-side album since Nextcloud 25
 @toString
 @genCopyWith
-class NcAlbum {
+class NcAlbum with EquatableMixin {
   NcAlbum({
     required String path,
     required this.lastPhoto,
@@ -37,6 +38,17 @@ class NcAlbum {
   @override
   String toString() => _$toString();
 
+  @override
+  List<Object?> get props => [
+        path,
+        lastPhoto,
+        nbItems,
+        location,
+        dateStart,
+        dateEnd,
+        collaborators,
+      ];
+
   final String path;
 
   /// File ID of the last photo

app/lib/use_case/populate_album.dart

@@ -8,8 +8,6 @@ import 'package:nc_photos/entity/album.dart';
 import 'package:nc_photos/entity/album/item.dart';
 import 'package:nc_photos/entity/album/provider.dart';
 import 'package:nc_photos/entity/file.dart';
-import 'package:nc_photos/entity/file/data_source.dart';
-import 'package:nc_photos/entity/file_util.dart' as file_util;
 import 'package:nc_photos/exception_event.dart';
 import 'package:nc_photos/use_case/list_tagged_file.dart';
 import 'package:nc_photos/use_case/scan_dir.dart';
@@ -32,8 +30,6 @@ class PopulateAlbum {
       return _populateDirAlbum(account, album);
     } else if (album.provider is AlbumTagProvider) {
       return _populateTagAlbum(account, album);
-    } else if (album.provider is AlbumMemoryProvider) {
-      return _populateMemoryAlbum(account, album);
     } else {
       throw ArgumentError(
           "Unknown album provider: ${album.provider.runtimeType}");
@@ -80,25 +76,5 @@ class PopulateAlbum {
     return products;
   }
 
-  Future<List<AlbumItem>> _populateMemoryAlbum(
-      Account account, Album album) async {
-    assert(album.provider is AlbumMemoryProvider);
-    final provider = album.provider as AlbumMemoryProvider;
-    final date = DateTime(provider.year, provider.month, provider.day);
-    final dayRange = _c.pref.getMemoriesRangeOr();
-    final from = date.subtract(Duration(days: dayRange));
-    final to = date.add(Duration(days: dayRange + 1));
-    final files = await FileSqliteDbDataSource(_c).listByDate(
-        account, from.millisecondsSinceEpoch, to.millisecondsSinceEpoch);
-    return files
-        .where((f) => file_util.isSupportedFormat(f))
-        .map((f) => AlbumFileItem(
-              addedBy: account.userId,
-              addedAt: clock.now(),
-              file: f,
-            ))
-        .toList();
-  }
-
   final DiContainer _c;
 }

app/lib/widget/album_browser_util.dart

@@ -3,16 +3,12 @@ import 'package:nc_photos/account.dart';
 import 'package:nc_photos/entity/album.dart';
 import 'package:nc_photos/entity/album/provider.dart';
 import 'package:nc_photos/widget/album_browser.dart';
-import 'package:nc_photos/widget/smart_album_browser.dart';
 
 /// Push the corresponding browser route for this album
 void push(BuildContext context, Account account, Album album) {
   if (album.provider is AlbumStaticProvider) {
     Navigator.of(context).pushNamed(AlbumBrowser.routeName,
         arguments: AlbumBrowserArguments(account, album));
-  } else if (album.provider is AlbumSmartProvider) {
-    Navigator.of(context).pushNamed(SmartAlbumBrowser.routeName,
-        arguments: SmartAlbumBrowserArguments(account, album));
   }
 }
 

app/lib/widget/builder/photo_list_item_builder.dart

@@ -5,7 +5,7 @@ import 'package:logging/logging.dart';
 import 'package:nc_photos/account.dart';
 import 'package:nc_photos/app_init.dart' as app_init;
 import 'package:nc_photos/app_localizations.dart';
-import 'package:nc_photos/entity/album.dart';
+import 'package:nc_photos/entity/collection.dart';
 import 'package:nc_photos/entity/file_descriptor.dart';
 import 'package:nc_photos/entity/file_util.dart' as file_util;
 import 'package:nc_photos/object_extension.dart';
@@ -49,12 +49,12 @@ class PhotoListItemBuilderResult {
   const PhotoListItemBuilderResult(
     this.backingFiles,
     this.listItems, {
-    this.smartAlbums = const [],
+    this.smartCollections = const [],
   });
 
   final List<FileDescriptor> backingFiles;
   final List<SelectableItem> listItems;
-  final List<Album> smartAlbums;
+  final List<Collection> smartCollections;
 }
 
 typedef PhotoListItemSorter = int Function(FileDescriptor, FileDescriptor);
@@ -137,7 +137,7 @@ class _PhotoListItemBuilder {
       Account account, List<FileDescriptor> files) {
     final today = clock.now();
     final memoryAlbumHelper = smartAlbumConfig != null
-        ? MemoryAlbumHelper(
+        ? MemoryCollectionHelper(account,
             today: today, dayRange: smartAlbumConfig!.memoriesDayRange)
         : null;
     final listItems = <SelectableItem>[];
@@ -155,7 +155,7 @@ class _PhotoListItemBuilder {
     return PhotoListItemBuilderResult(
       files,
       listItems,
-      smartAlbums: smartAlbums ?? [],
+      smartCollections: smartAlbums ?? [],
     );
   }
 

app/lib/widget/collection_browser/bloc.dart

@@ -8,6 +8,8 @@ class _Bloc extends Bloc<_Event, _State> implements BlocTag {
     required this.collectionsController,
     required Collection collection,
   })  : _c = container,
+        _isAdHocCollection = !collectionsController.stream.value.data
+            .any((e) => e.collection.compareIdentity(collection)),
         super(_State.init(
           collection: collection,
           coverUrl: _getCoverUrl(collection),
@@ -45,14 +47,16 @@ class _Bloc extends Bloc<_Event, _State> implements BlocTag {
     on<_SetError>(_onSetError);
     on<_SetMessage>(_onSetMessage);
 
-    _collectionControllerSubscription =
-        collectionsController.stream.listen((event) {
-      final c = event.data
-          .firstWhere((d) => state.collection.compareIdentity(d.collection));
-      if (!identical(c, state.collection)) {
-        add(_UpdateCollection(c.collection));
-      }
-    });
+    if (!_isAdHocCollection) {
+      _collectionControllerSubscription =
+          collectionsController.stream.listen((event) {
+        final c = event.data
+            .firstWhere((d) => state.collection.compareIdentity(d.collection));
+        if (!identical(c, state.collection)) {
+          add(_UpdateCollection(c.collection));
+        }
+      });
+    }
     _itemsControllerSubscription = itemsController.stream.listen(
       (_) {},
       onError: (e, stackTrace) {
@@ -448,6 +452,10 @@ class _Bloc extends Bloc<_Event, _State> implements BlocTag {
   final CollectionsController collectionsController;
   late final CollectionItemsController itemsController;
 
+  /// Specify if the supplied [collection] is an "inline" one, which means it's
+  /// not returned from the collection controller but rather created temporarily
+  final bool _isAdHocCollection;
+
   StreamSubscription? _collectionControllerSubscription;
   StreamSubscription? _itemsControllerSubscription;
 }

app/lib/widget/home_photos.dart

@@ -18,7 +18,7 @@ import 'package:nc_photos/bloc/scan_account_dir.dart';
 import 'package:nc_photos/compute_queue.dart';
 import 'package:nc_photos/di_container.dart';
 import 'package:nc_photos/download_handler.dart';
-import 'package:nc_photos/entity/album.dart';
+import 'package:nc_photos/entity/collection.dart';
 import 'package:nc_photos/entity/file_descriptor.dart';
 import 'package:nc_photos/entity/sqlite/database.dart' as sql;
 import 'package:nc_photos/event/event.dart';
@@ -38,19 +38,18 @@ import 'package:nc_photos/theme.dart';
 import 'package:nc_photos/throttler.dart';
 import 'package:nc_photos/use_case/startup_sync.dart';
 import 'package:nc_photos/widget/builder/photo_list_item_builder.dart';
+import 'package:nc_photos/widget/collection_browser.dart';
 import 'package:nc_photos/widget/handler/add_selection_to_collection_handler.dart';
 import 'package:nc_photos/widget/handler/archive_selection_handler.dart';
 import 'package:nc_photos/widget/handler/double_tap_exit_handler.dart';
 import 'package:nc_photos/widget/handler/remove_selection_handler.dart';
 import 'package:nc_photos/widget/home_app_bar.dart';
-import 'package:nc_photos/widget/network_thumbnail.dart';
 import 'package:nc_photos/widget/page_visibility_mixin.dart';
 import 'package:nc_photos/widget/photo_list_item.dart';
 import 'package:nc_photos/widget/photo_list_util.dart' as photo_list_util;
 import 'package:nc_photos/widget/selectable_item_stream_list_mixin.dart';
 import 'package:nc_photos/widget/selection_app_bar.dart';
 import 'package:nc_photos/widget/settings.dart';
-import 'package:nc_photos/widget/smart_album_browser.dart';
 import 'package:nc_photos/widget/viewer.dart';
 import 'package:nc_photos/widget/zoom_menu_button.dart';
 import 'package:np_codegen/np_codegen.dart';
@@ -192,7 +191,7 @@ class _HomePhotosState extends State<HomePhotos>
                       _web?.buildContent(context),
                       if (AccountPref.of(widget.account)
                               .isEnableMemoryAlbumOr(true) &&
-                          _smartAlbums.isNotEmpty)
+                          _smartCollections.isNotEmpty)
                         _buildSmartAlbumList(context),
                       BlocBuilder<ScanAccountDirBloc, ScanAccountDirBlocState>(
                         bloc: _bloc,
@@ -352,9 +351,9 @@ class _HomePhotosState extends State<HomePhotos>
 
   Widget _buildSmartAlbumList(BuildContext context) {
     return SliverToBoxAdapter(
-      child: _SmartAlbumList(
+      child: _SmartCollectionList(
         account: widget.account,
-        albums: _smartAlbums,
+        collections: _smartCollections,
       ),
     );
   }
@@ -613,7 +612,7 @@ class _HomePhotosState extends State<HomePhotos>
           setState(() {
             _backingFiles = result.backingFiles;
             itemStreamListItems = result.listItems;
-            _smartAlbums = result.smartAlbums;
+            _smartCollections = result.smartCollections;
 
             if (isPostSuccess) {
               _isScrollbarVisible = true;
@@ -680,7 +679,7 @@ class _HomePhotosState extends State<HomePhotos>
       final metadataTaskHeaderExtent = _web?.getHeaderHeight() ?? 0;
       final smartAlbumListHeight =
           AccountPref.of(widget.account).isEnableMemoryAlbumOr(true) &&
-                  _smartAlbums.isNotEmpty
+                  _smartCollections.isNotEmpty
               ? _SmartAlbumItem.height
               : 0;
       // scroll extent = list height - widget viewport height
@@ -745,7 +744,7 @@ class _HomePhotosState extends State<HomePhotos>
   late final _queryProgressBloc = ProgressBloc();
 
   var _backingFiles = <FileDescriptor>[];
-  var _smartAlbums = <Album>[];
+  var _smartCollections = <Collection>[];
 
   final _buildItemQueue =
       ComputeQueue<PhotoListItemBuilderArguments, PhotoListItemBuilderResult>();
@@ -1006,10 +1005,10 @@ class _MetadataTaskLoadingIcon extends AnimatedWidget {
   Animation<double> get _progress => listenable as Animation<double>;
 }
 
-class _SmartAlbumList extends StatelessWidget {
-  const _SmartAlbumList({
+class _SmartCollectionList extends StatelessWidget {
+  const _SmartCollectionList({
     required this.account,
-    required this.albums,
+    required this.collections,
   });
 
   @override
@@ -1019,19 +1018,20 @@ class _SmartAlbumList extends StatelessWidget {
       child: ListView.separated(
         scrollDirection: Axis.horizontal,
         padding: const EdgeInsets.symmetric(horizontal: 8),
-        itemCount: albums.length,
+        itemCount: collections.length,
         itemBuilder: (context, index) {
-          final a = albums[index];
-          final coverFile = a.coverProvider.getCover(a);
+          final c = collections[index];
           return _SmartAlbumItem(
             account: account,
-            previewUrl: coverFile == null
-                ? null
-                : NetworkRectThumbnail.imageUrlForFile(account, coverFile),
-            label: a.name,
+            previewUrl: c.getCoverUrl(
+              k.photoThumbSize,
+              k.photoThumbSize,
+              isKeepAspectRatio: true,
+            ),
+            label: c.name,
             onTap: () {
-              Navigator.of(context).pushNamed(SmartAlbumBrowser.routeName,
-                  arguments: SmartAlbumBrowserArguments(account, a));
+              Navigator.of(context).pushNamed(CollectionBrowser.routeName,
+                  arguments: CollectionBrowserArguments(c));
             },
           );
         },
@@ -1041,7 +1041,7 @@ class _SmartAlbumList extends StatelessWidget {
   }
 
   final Account account;
-  final List<Album> albums;
+  final List<Collection> collections;
 }
 
 class _SmartAlbumItem extends StatelessWidget {

app/lib/widget/my_app.dart

@@ -39,7 +39,6 @@ import 'package:nc_photos/widget/shared_file_viewer.dart';
 import 'package:nc_photos/widget/sharing_browser.dart';
 import 'package:nc_photos/widget/sign_in.dart';
 import 'package:nc_photos/widget/slideshow_viewer.dart';
-import 'package:nc_photos/widget/smart_album_browser.dart';
 import 'package:nc_photos/widget/splash.dart';
 import 'package:nc_photos/widget/trashbin_browser.dart';
 import 'package:nc_photos/widget/trashbin_viewer.dart';
@@ -195,7 +194,6 @@ class _WrappedAppState extends State<_WrappedApp>
     route ??= _handleAlbumShareOutlierBrowserRoute(settings);
     route ??= _handleAccountSettingsRoute(settings);
     route ??= _handleShareFolderPickerRoute(settings);
-    route ??= _handleSmartAlbumBrowserRoute(settings);
     route ??= _handleEnhancedPhotoBrowserRoute(settings);
     route ??= _handleLocalFileViewerRoute(settings);
     route ??= _handleEnhancementSettingsRoute(settings);
@@ -455,20 +453,6 @@ class _WrappedAppState extends State<_WrappedApp>
     return null;
   }
 
-  Route<dynamic>? _handleSmartAlbumBrowserRoute(RouteSettings settings) {
-    try {
-      if (settings.name == SmartAlbumBrowser.routeName &&
-          settings.arguments != null) {
-        final args = settings.arguments as SmartAlbumBrowserArguments;
-        return SmartAlbumBrowser.buildRoute(args);
-      }
-    } catch (e) {
-      _log.severe(
-          "[_handleSmartAlbumBrowserRoute] Failed while handling route", e);
-    }
-    return null;
-  }
-
   Route<dynamic>? _handleEnhancedPhotoBrowserRoute(RouteSettings settings) {
     try {
       if (settings.name == EnhancedPhotoBrowser.routeName &&

app/lib/widget/photo_list_util.dart

@@ -3,11 +3,10 @@ import 'dart:math' as math;
 import 'package:clock/clock.dart';
 import 'package:collection/collection.dart';
 import 'package:logging/logging.dart';
+import 'package:nc_photos/account.dart';
 import 'package:nc_photos/date_time_extension.dart';
-import 'package:nc_photos/entity/album.dart';
-import 'package:nc_photos/entity/album/cover_provider.dart';
-import 'package:nc_photos/entity/album/provider.dart';
-import 'package:nc_photos/entity/album/sort_provider.dart';
+import 'package:nc_photos/entity/collection.dart';
+import 'package:nc_photos/entity/collection/content_provider/memory.dart';
 import 'package:nc_photos/entity/file_descriptor.dart';
 import 'package:np_codegen/np_codegen.dart';
 
@@ -34,12 +33,13 @@ class DateGroupHelper {
   DateTime? _currentDate;
 }
 
-/// Build memory album from files
+/// Build memory collection from files
 ///
 /// Feb 29 is treated as Mar 1 on non leap years
 @npLog
-class MemoryAlbumHelper {
-  MemoryAlbumHelper({
+class MemoryCollectionHelper {
+  MemoryCollectionHelper(
+    this.account, {
     DateTime? today,
     required int dayRange,
   })  : today = (today?.toLocal() ?? clock.now()).toMidnight(),
@@ -65,16 +65,18 @@ class MemoryAlbumHelper {
   ///
   /// [nameBuilder] is a function that return the name of the album for a
   /// particular year
-  List<Album> build(String Function(int year) nameBuilder) {
+  List<Collection> build(String Function(int year) nameBuilder) {
     return _data.entries
         .sorted((a, b) => b.key.compareTo(a.key))
-        .map((e) => Album(
+        .map((e) => Collection(
               name: nameBuilder(e.key),
-              provider: AlbumMemoryProvider(
-                  year: e.key, month: today.month, day: today.day),
-              coverProvider:
-                  AlbumMemoryCoverProvider(coverFile: e.value.coverFile),
-              sortProvider: const AlbumTimeSortProvider(isAscending: false),
+              contentProvider: CollectionMemoryProvider(
+                account: account,
+                year: e.key,
+                month: today.month,
+                day: today.day,
+                cover: e.value.coverFile,
+              ),
             ))
         .toList();
   }
@@ -83,9 +85,9 @@ class MemoryAlbumHelper {
     final item = _data[year];
     final date = today.copyWith(year: year);
     if (item == null) {
-      _data[year] = _MemoryAlbumHelperItem(date, f);
+      _data[year] = _MemoryCollectionHelperItem(date, f);
     } else {
-      final coverDiff = _MemoryAlbumHelperItem.getCoverDiff(date, f);
+      final coverDiff = _MemoryCollectionHelperItem.getCoverDiff(date, f);
       if (coverDiff < item.coverDiff) {
         item.coverFile = f;
         item.coverDiff = coverDiff;
@@ -93,9 +95,10 @@ class MemoryAlbumHelper {
     }
   }
 
+  final Account account;
   final DateTime today;
   final int dayRange;
-  final _data = <int, _MemoryAlbumHelperItem>{};
+  final _data = <int, _MemoryCollectionHelperItem>{};
 }
 
 int getThumbSize(int zoomLevel) {
@@ -115,8 +118,8 @@ int getThumbSize(int zoomLevel) {
   }
 }
 
-class _MemoryAlbumHelperItem {
-  _MemoryAlbumHelperItem(this.date, this.coverFile)
+class _MemoryCollectionHelperItem {
+  _MemoryCollectionHelperItem(this.date, this.coverFile)
       : coverDiff = getCoverDiff(date, coverFile);
 
   static Duration getCoverDiff(DateTime date, FileDescriptor f) =>

app/lib/widget/photo_list_util.g.dart

@@ -6,9 +6,9 @@ part of 'photo_list_util.dart';
 // NpLogGenerator
 // **************************************************************************
 
-extension _$MemoryAlbumHelperNpLog on MemoryAlbumHelper {
+extension _$MemoryCollectionHelperNpLog on MemoryCollectionHelper {
   // ignore: unused_element
   Logger get _log => log;
 
-  static final log = Logger("widget.photo_list_util.MemoryAlbumHelper");
+  static final log = Logger("widget.photo_list_util.MemoryCollectionHelper");
 }

app/lib/widget/smart_album_browser.dart

@@ -1,403 +0,0 @@
-import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
-import 'package:kiwi/kiwi.dart';
-import 'package:logging/logging.dart';
-import 'package:nc_photos/account.dart';
-import 'package:nc_photos/app_localizations.dart';
-import 'package:nc_photos/di_container.dart';
-import 'package:nc_photos/download_handler.dart';
-import 'package:nc_photos/entity/album.dart';
-import 'package:nc_photos/entity/album/item.dart';
-import 'package:nc_photos/entity/album/provider.dart';
-import 'package:nc_photos/entity/file.dart';
-import 'package:nc_photos/entity/file_util.dart' as file_util;
-import 'package:nc_photos/flutter_util.dart' as flutter_util;
-import 'package:nc_photos/object_extension.dart';
-import 'package:nc_photos/share_handler.dart';
-import 'package:nc_photos/use_case/preprocess_album.dart';
-import 'package:nc_photos/widget/album_browser_mixin.dart';
-import 'package:nc_photos/widget/handler/add_selection_to_collection_handler.dart';
-import 'package:nc_photos/widget/network_thumbnail.dart';
-import 'package:nc_photos/widget/photo_list_item.dart';
-import 'package:nc_photos/widget/selectable_item_stream_list_mixin.dart';
-import 'package:nc_photos/widget/viewer.dart';
-import 'package:np_codegen/np_codegen.dart';
-import 'package:to_string/to_string.dart';
-
-part 'smart_album_browser.g.dart';
-
-class SmartAlbumBrowserArguments {
-  const SmartAlbumBrowserArguments(this.account, this.album);
-
-  final Account account;
-  final Album album;
-}
-
-class SmartAlbumBrowser extends StatefulWidget {
-  static const routeName = "/smart-album-browser";
-
-  static Route buildRoute(SmartAlbumBrowserArguments args) => MaterialPageRoute(
-        builder: (context) => SmartAlbumBrowser.fromArgs(args),
-      );
-
-  const SmartAlbumBrowser({
-    Key? key,
-    required this.account,
-    required this.album,
-  }) : super(key: key);
-
-  SmartAlbumBrowser.fromArgs(SmartAlbumBrowserArguments args, {Key? key})
-      : this(
-          key: key,
-          account: args.account,
-          album: args.album,
-        );
-
-  @override
-  createState() => _SmartAlbumBrowserState();
-
-  final Account account;
-  final Album album;
-}
-
-@npLog
-class _SmartAlbumBrowserState extends State<SmartAlbumBrowser>
-    with
-        SelectableItemStreamListMixin<SmartAlbumBrowser>,
-        AlbumBrowserMixin<SmartAlbumBrowser> {
-  _SmartAlbumBrowserState() {
-    final c = KiwiContainer().resolve<DiContainer>();
-    assert(PreProcessAlbum.require(c));
-    _c = c;
-  }
-
-  @override
-  initState() {
-    super.initState();
-    _initAlbum();
-  }
-
-  @override
-  build(BuildContext context) {
-    return Scaffold(
-      body: Builder(
-        builder: (context) => _buildContent(context),
-      ),
-    );
-  }
-
-  @override
-  onItemTap(SelectableItem item, int index) {
-    item.as<_ListItem>()?.onTap?.call();
-  }
-
-  @override
-  @protected
-  get canEdit => false;
-
-  Future<void> _initAlbum() async {
-    assert(widget.album.provider is AlbumSmartProvider);
-    _log.info("[_initAlbum] ${widget.album}");
-    final items = await PreProcessAlbum(_c)(widget.account, widget.album);
-    if (mounted) {
-      setState(() {
-        _album = widget.album;
-        _transformItems(items);
-        initCover(widget.account, widget.album);
-      });
-    }
-  }
-
-  Widget _buildContent(BuildContext context) {
-    if (_album == null) {
-      return CustomScrollView(
-        slivers: [
-          buildNormalAppBar(context, widget.account, widget.album),
-          const SliverToBoxAdapter(
-            child: LinearProgressIndicator(),
-          ),
-        ],
-      );
-    } else {
-      return buildItemStreamListOuter(
-        context,
-        child: CustomScrollView(
-          slivers: [
-            _buildAppBar(context),
-            buildItemStreamList(
-              maxCrossAxisExtent: thumbSize.toDouble(),
-            ),
-          ],
-        ),
-      );
-    }
-  }
-
-  Widget _buildAppBar(BuildContext context) {
-    if (isSelectionMode) {
-      return _buildSelectionAppBar(context);
-    } else {
-      return _buildNormalAppBar(context);
-    }
-  }
-
-  Widget _buildNormalAppBar(BuildContext context) {
-    final menuItems = <PopupMenuEntry<int>>[
-      PopupMenuItem(
-        value: _menuValueDownload,
-        child: Text(L10n.global().downloadTooltip),
-      ),
-    ];
-
-    return buildNormalAppBar(
-      context,
-      widget.account,
-      _album!,
-      menuItemBuilder: (_) => menuItems,
-      onSelectedMenuItem: (option) {
-        switch (option) {
-          case _menuValueDownload:
-            _onDownloadPressed();
-            break;
-          default:
-            _log.shout("[_buildNormalAppBar] Unknown value: $option");
-            break;
-        }
-      },
-    );
-  }
-
-  Widget _buildSelectionAppBar(BuildContext context) {
-    return buildSelectionAppBar(context, [
-      IconButton(
-        icon: const Icon(Icons.share),
-        tooltip: L10n.global().shareTooltip,
-        onPressed: () {
-          _onSelectionSharePressed(context);
-        },
-      ),
-      IconButton(
-        icon: const Icon(Icons.add),
-        tooltip: L10n.global().addToAlbumTooltip,
-        onPressed: () => _onSelectionAddPressed(context),
-      ),
-      PopupMenuButton<_SelectionMenuOption>(
-        tooltip: MaterialLocalizations.of(context).moreButtonTooltip,
-        itemBuilder: (context) => [
-          PopupMenuItem(
-            value: _SelectionMenuOption.download,
-            child: Text(L10n.global().downloadTooltip),
-          ),
-        ],
-        onSelected: (option) => _onSelectionMenuSelected(context, option),
-      ),
-    ]);
-  }
-
-  void _onItemTap(int index) {
-    // convert item index to file index
-    var fileIndex = index;
-    for (int i = 0; i < index; ++i) {
-      if (_sortedItems[i] is! AlbumFileItem ||
-          !file_util
-              .isSupportedFormat((_sortedItems[i] as AlbumFileItem).file)) {
-        --fileIndex;
-      }
-    }
-    Navigator.pushNamed(context, Viewer.routeName,
-        arguments: ViewerArguments(widget.account, _backingFiles, fileIndex));
-  }
-
-  void _onDownloadPressed() {
-    final c = KiwiContainer().resolve<DiContainer>();
-    DownloadHandler(c).downloadFiles(
-      widget.account,
-      _sortedItems.whereType<AlbumFileItem>().map((e) => e.file).toList(),
-      parentDir: _album!.name,
-    );
-  }
-
-  void _onSelectionMenuSelected(
-      BuildContext context, _SelectionMenuOption option) {
-    switch (option) {
-      case _SelectionMenuOption.download:
-        _onSelectionDownloadPressed();
-        break;
-      default:
-        _log.shout("[_onSelectionMenuSelected] Unknown option: $option");
-        break;
-    }
-  }
-
-  void _onSelectionSharePressed(BuildContext context) {
-    final c = KiwiContainer().resolve<DiContainer>();
-    final selected = selectedListItems
-        .whereType<_FileListItem>()
-        .map((e) => e.file)
-        .toList();
-    ShareHandler(
-      c,
-      context: context,
-      clearSelection: () {
-        setState(() {
-          clearSelectedItems();
-        });
-      },
-    ).shareFiles(widget.account, selected);
-  }
-
-  Future<void> _onSelectionAddPressed(BuildContext context) async {
-    return const AddSelectionToCollectionHandler()(
-      context: context,
-      selection: selectedListItems
-          .whereType<_FileListItem>()
-          .map((e) => e.file)
-          .toList(),
-      clearSelection: () {
-        if (mounted) {
-          setState(() {
-            clearSelectedItems();
-          });
-        }
-      },
-    );
-  }
-
-  void _onSelectionDownloadPressed() {
-    final c = KiwiContainer().resolve<DiContainer>();
-    final selected = selectedListItems
-        .whereType<_FileListItem>()
-        .map((e) => e.file)
-        .toList();
-    DownloadHandler(c).downloadFiles(widget.account, selected);
-    setState(() {
-      clearSelectedItems();
-    });
-  }
-
-  void _transformItems(List<AlbumItem> items) {
-    // items come sorted for smart album
-    _sortedItems = _album!.sortProvider.sort(items);
-    _backingFiles = _sortedItems
-        .whereType<AlbumFileItem>()
-        .map((i) => i.file)
-        .where((f) => file_util.isSupportedFormat(f))
-        .toList();
-
-    itemStreamListItems = () sync* {
-      for (int i = 0; i < _sortedItems.length; ++i) {
-        final item = _sortedItems[i];
-        if (item is AlbumFileItem) {
-          final previewUrl =
-              NetworkRectThumbnail.imageUrlForFile(widget.account, item.file);
-          if (file_util.isSupportedImageFormat(item.file)) {
-            yield _ImageListItem(
-              index: i,
-              file: item.file,
-              account: widget.account,
-              previewUrl: previewUrl,
-              onTap: () => _onItemTap(i),
-            );
-          } else if (file_util.isSupportedVideoFormat(item.file)) {
-            yield _VideoListItem(
-              index: i,
-              file: item.file,
-              account: widget.account,
-              previewUrl: previewUrl,
-              onTap: () => _onItemTap(i),
-            );
-          }
-        }
-      }
-    }()
-        .toList();
-  }
-
-  late final DiContainer _c;
-
-  Album? _album;
-  var _sortedItems = <AlbumItem>[];
-  var _backingFiles = <File>[];
-
-  static const _menuValueDownload = 1;
-}
-
-enum _SelectionMenuOption {
-  download,
-}
-
-@toString
-abstract class _ListItem implements SelectableItem {
-  const _ListItem({
-    required this.index,
-    this.onTap,
-  });
-
-  @override
-  get isTappable => onTap != null;
-
-  @override
-  get isSelectable => true;
-
-  @override
-  get staggeredTile => const StaggeredTile.count(1, 1);
-
-  @override
-  String toString() => _$toString();
-
-  final int index;
-
-  @ignore
-  final VoidCallback? onTap;
-}
-
-abstract class _FileListItem extends _ListItem {
-  _FileListItem({
-    required super.index,
-    required this.file,
-    super.onTap,
-  });
-
-  final File file;
-}
-
-class _ImageListItem extends _FileListItem {
-  _ImageListItem({
-    required super.index,
-    required super.file,
-    required this.account,
-    required this.previewUrl,
-    super.onTap,
-  });
-
-  @override
-  buildWidget(BuildContext context) => PhotoListImage(
-        account: account,
-        previewUrl: previewUrl,
-        isGif: file.contentType == "image/gif",
-        heroKey: flutter_util.getImageHeroTag(file),
-      );
-
-  final Account account;
-  final String previewUrl;
-}
-
-class _VideoListItem extends _FileListItem {
-  _VideoListItem({
-    required super.index,
-    required super.file,
-    required this.account,
-    required this.previewUrl,
-    super.onTap,
-  });
-
-  @override
-  buildWidget(BuildContext context) => PhotoListVideo(
-        account: account,
-        previewUrl: previewUrl,
-      );
-
-  final Account account;
-  final String previewUrl;
-}

app/lib/widget/smart_album_browser.g.dart

@@ -1,26 +0,0 @@
-// GENERATED CODE - DO NOT MODIFY BY HAND
-
-part of 'smart_album_browser.dart';
-
-// **************************************************************************
-// NpLogGenerator
-// **************************************************************************
-
-extension _$_SmartAlbumBrowserStateNpLog on _SmartAlbumBrowserState {
-  // ignore: unused_element
-  Logger get _log => log;
-
-  static final log =
-      Logger("widget.smart_album_browser._SmartAlbumBrowserState");
-}
-
-// **************************************************************************
-// ToStringGenerator
-// **************************************************************************
-
-extension _$_ListItemToString on _ListItem {
-  String _$toString() {
-    // ignore: unnecessary_string_interpolations
-    return "${objectRuntimeType(this, "_ListItem")} {index: $index}";
-  }
-}

app/test/widget/photo_list_util_test.dart

@@ -1,15 +1,12 @@
-import 'package:nc_photos/entity/album.dart';
-import 'package:nc_photos/entity/album/cover_provider.dart';
-import 'package:nc_photos/entity/album/provider.dart';
-import 'package:nc_photos/entity/album/sort_provider.dart';
-import 'package:nc_photos/or_null.dart';
+import 'package:nc_photos/entity/collection.dart';
+import 'package:nc_photos/entity/collection/content_provider/memory.dart';
 import 'package:nc_photos/widget/photo_list_util.dart';
 import 'package:test/test.dart';
 
 import '../test_util.dart' as util;
 
 void main() {
-  group("MemoryAlbumHelper", () {
+  group("MemoryCollectionHelper", () {
     test("same year", _sameYear);
     test("next year", _nextYear);
     group("prev year", () {
@@ -54,8 +51,9 @@ void main() {
 /// File: 2021-02-01
 /// Expect: empty
 void _sameYear() {
+  final account = util.buildAccount();
   final today = DateTime(2021, 2, 3);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2021, 2, 3));
   obj.addFile(file);
@@ -69,8 +67,9 @@ void _sameYear() {
 /// File: 2022-02-03
 /// Expect: empty
 void _nextYear() {
+  final account = util.buildAccount();
   final today = DateTime(2021, 2, 3);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2022, 2, 3));
   obj.addFile(file);
@@ -83,24 +82,19 @@ void _nextYear() {
 /// File: 2020-02-03
 /// Expect: [2020]
 void _prevYear() {
+  final account = util.buildAccount();
   final today = DateTime(2021, 2, 3);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2020, 2, 3));
   obj.addFile(file);
   expect(
-    obj
-        .build(_nameBuilder)
-        .map((a) => a.copyWith(lastUpdated: OrNull(DateTime(2021))))
-        .toList(),
+    obj.build(_nameBuilder).toList(),
     [
-      Album(
+      Collection(
         name: "2020",
-        provider:
-            AlbumMemoryProvider(year: 2020, month: today.month, day: today.day),
-        coverProvider: AlbumMemoryCoverProvider(coverFile: file),
-        sortProvider: const AlbumTimeSortProvider(isAscending: false),
-        lastUpdated: DateTime(2021),
+        contentProvider: CollectionMemoryProvider(
+            account: account, year: 2020, month: 2, day: 3, cover: file),
       ),
     ],
   );
@@ -112,8 +106,9 @@ void _prevYear() {
 /// File: 2020-01-31
 /// Expect: empty
 void _prevYear3DaysBefore() {
+  final account = util.buildAccount();
   final today = DateTime(2021, 2, 3);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2020, 1, 31));
   obj.addFile(file);
@@ -126,24 +121,19 @@ void _prevYear3DaysBefore() {
 /// File: 2020-02-01
 /// Expect: [2020]
 void _prevYear2DaysBefore() {
+  final account = util.buildAccount();
   final today = DateTime(2021, 2, 3);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2020, 2, 1));
   obj.addFile(file);
   expect(
-    obj
-        .build(_nameBuilder)
-        .map((a) => a.copyWith(lastUpdated: OrNull(DateTime(2021))))
-        .toList(),
+    obj.build(_nameBuilder).toList(),
     [
-      Album(
+      Collection(
         name: "2020",
-        provider:
-            AlbumMemoryProvider(year: 2020, month: today.month, day: today.day),
-        coverProvider: AlbumMemoryCoverProvider(coverFile: file),
-        sortProvider: const AlbumTimeSortProvider(isAscending: false),
-        lastUpdated: DateTime(2021),
+        contentProvider: CollectionMemoryProvider(
+            account: account, year: 2020, month: 2, day: 3, cover: file),
       ),
     ],
   );
@@ -155,8 +145,9 @@ void _prevYear2DaysBefore() {
 /// File: 2020-02-06
 /// Expect: empty
 void _prevYear3DaysAfter() {
+  final account = util.buildAccount();
   final today = DateTime(2021, 2, 3);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2020, 2, 6));
   obj.addFile(file);
@@ -169,24 +160,19 @@ void _prevYear3DaysAfter() {
 /// File: 2020-02-05
 /// Expect: [2020]
 void _prevYear2DaysAfter() {
+  final account = util.buildAccount();
   final today = DateTime(2021, 2, 3);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2020, 2, 5));
   obj.addFile(file);
   expect(
-    obj
-        .build(_nameBuilder)
-        .map((a) => a.copyWith(lastUpdated: OrNull(DateTime(2021))))
-        .toList(),
+    obj.build(_nameBuilder).toList(),
     [
-      Album(
+      Collection(
         name: "2020",
-        provider:
-            AlbumMemoryProvider(year: 2020, month: today.month, day: today.day),
-        coverProvider: AlbumMemoryCoverProvider(coverFile: file),
-        sortProvider: const AlbumTimeSortProvider(isAscending: false),
-        lastUpdated: DateTime(2021),
+        contentProvider: CollectionMemoryProvider(
+            account: account, year: 2020, month: 2, day: 3, cover: file),
       ),
     ],
   );
@@ -198,8 +184,9 @@ void _prevYear2DaysAfter() {
 /// File: 2019-02-26
 /// Expect: empty
 void _onFeb29AddFeb26() {
+  final account = util.buildAccount();
   final today = DateTime(2020, 2, 29);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2019, 2, 26));
   obj.addFile(file);
@@ -212,24 +199,19 @@ void _onFeb29AddFeb26() {
 /// File: 2019-02-27
 /// Expect: [2019]
 void _onFeb29AddFeb27() {
+  final account = util.buildAccount();
   final today = DateTime(2020, 2, 29);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2019, 2, 27));
   obj.addFile(file);
   expect(
-    obj
-        .build(_nameBuilder)
-        .map((a) => a.copyWith(lastUpdated: OrNull(DateTime(2021))))
-        .toList(),
+    obj.build(_nameBuilder).toList(),
     [
-      Album(
+      Collection(
         name: "2019",
-        provider:
-            AlbumMemoryProvider(year: 2019, month: today.month, day: today.day),
-        coverProvider: AlbumMemoryCoverProvider(coverFile: file),
-        sortProvider: const AlbumTimeSortProvider(isAscending: false),
-        lastUpdated: DateTime(2021),
+        contentProvider: CollectionMemoryProvider(
+            account: account, year: 2019, month: 2, day: 29, cover: file),
       ),
     ],
   );
@@ -241,8 +223,9 @@ void _onFeb29AddFeb27() {
 /// File: 2019-03-04
 /// Expect: empty
 void _onFeb29AddMar4() {
+  final account = util.buildAccount();
   final today = DateTime(2020, 2, 29);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2019, 3, 4));
   obj.addFile(file);
@@ -255,24 +238,19 @@ void _onFeb29AddMar4() {
 /// File: 2019-03-03
 /// Expect: [2019]
 void _onFeb29AddMar3() {
+  final account = util.buildAccount();
   final today = DateTime(2020, 2, 29);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2019, 3, 3));
   obj.addFile(file);
   expect(
-    obj
-        .build(_nameBuilder)
-        .map((a) => a.copyWith(lastUpdated: OrNull(DateTime(2021))))
-        .toList(),
+    obj.build(_nameBuilder).toList(),
     [
-      Album(
+      Collection(
         name: "2019",
-        provider:
-            AlbumMemoryProvider(year: 2019, month: today.month, day: today.day),
-        coverProvider: AlbumMemoryCoverProvider(coverFile: file),
-        sortProvider: const AlbumTimeSortProvider(isAscending: false),
-        lastUpdated: DateTime(2021),
+        contentProvider: CollectionMemoryProvider(
+            account: account, year: 2019, month: 2, day: 29, cover: file),
       ),
     ],
   );
@@ -284,8 +262,9 @@ void _onFeb29AddMar3() {
 /// File: 2016-03-03
 /// Expect: empty
 void _onFeb29AddMar3LeapYear() {
+  final account = util.buildAccount();
   final today = DateTime(2020, 2, 29);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2016, 3, 3));
   obj.addFile(file);
@@ -298,24 +277,19 @@ void _onFeb29AddMar3LeapYear() {
 /// File: 2016-03-02
 /// Expect: [2016]
 void _onFeb29AddMar2LeapYear() {
+  final account = util.buildAccount();
   final today = DateTime(2020, 2, 29);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2016, 3, 2));
   obj.addFile(file);
   expect(
-    obj
-        .build(_nameBuilder)
-        .map((a) => a.copyWith(lastUpdated: OrNull(DateTime(2021))))
-        .toList(),
+    obj.build(_nameBuilder).toList(),
     [
-      Album(
+      Collection(
         name: "2016",
-        provider:
-            AlbumMemoryProvider(year: 2016, month: today.month, day: today.day),
-        coverProvider: AlbumMemoryCoverProvider(coverFile: file),
-        sortProvider: const AlbumTimeSortProvider(isAscending: false),
-        lastUpdated: DateTime(2021),
+        contentProvider: CollectionMemoryProvider(
+            account: account, year: 2016, month: 2, day: 29, cover: file),
       ),
     ],
   );
@@ -327,8 +301,9 @@ void _onFeb29AddMar2LeapYear() {
 /// File: 2019-12-31
 /// Expect: empty
 void _onJan1AddDec31() {
+  final account = util.buildAccount();
   final today = DateTime(2020, 1, 1);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2019, 12, 31));
   obj.addFile(file);
@@ -341,24 +316,19 @@ void _onJan1AddDec31() {
 /// File: 2018-12-31
 /// Expect: [2019]
 void _onJan1AddDec31PrevYear() {
+  final account = util.buildAccount();
   final today = DateTime(2020, 1, 1);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2018, 12, 31));
   obj.addFile(file);
   expect(
-    obj
-        .build(_nameBuilder)
-        .map((a) => a.copyWith(lastUpdated: OrNull(DateTime(2021))))
-        .toList(),
+    obj.build(_nameBuilder).toList(),
     [
-      Album(
+      Collection(
         name: "2019",
-        provider:
-            AlbumMemoryProvider(year: 2019, month: today.month, day: today.day),
-        coverProvider: AlbumMemoryCoverProvider(coverFile: file),
-        sortProvider: const AlbumTimeSortProvider(isAscending: false),
-        lastUpdated: DateTime(2021),
+        contentProvider: CollectionMemoryProvider(
+            account: account, year: 2019, month: 1, day: 1, cover: file),
       ),
     ],
   );
@@ -370,24 +340,19 @@ void _onJan1AddDec31PrevYear() {
 /// File: 2020-01-01
 /// Expect: [2019]
 void _onDec31AddJan1() {
+  final account = util.buildAccount();
   final today = DateTime(2020, 12, 31);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 2);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 2);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2020, 1, 1));
   obj.addFile(file);
   expect(
-    obj
-        .build(_nameBuilder)
-        .map((a) => a.copyWith(lastUpdated: OrNull(DateTime(2021))))
-        .toList(),
+    obj.build(_nameBuilder).toList(),
     [
-      Album(
+      Collection(
         name: "2019",
-        provider:
-            AlbumMemoryProvider(year: 2019, month: today.month, day: today.day),
-        coverProvider: AlbumMemoryCoverProvider(coverFile: file),
-        sortProvider: const AlbumTimeSortProvider(isAscending: false),
-        lastUpdated: DateTime(2021),
+        contentProvider: CollectionMemoryProvider(
+            account: account, year: 2019, month: 12, day: 31, cover: file),
       ),
     ],
   );
@@ -399,24 +364,19 @@ void _onDec31AddJan1() {
 /// File: 2021-05-15
 /// Expect: [2022]
 void _onMay15AddMay15Range0() {
+  final account = util.buildAccount();
   final today = DateTime(2022, 5, 15);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 0);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 0);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2021, 5, 15));
   obj.addFile(file);
   expect(
-    obj
-        .build(_nameBuilder)
-        .map((a) => a.copyWith(lastUpdated: OrNull(DateTime(2021))))
-        .toList(),
+    obj.build(_nameBuilder).toList(),
     [
-      Album(
+      Collection(
         name: "2021",
-        provider:
-            AlbumMemoryProvider(year: 2021, month: today.month, day: today.day),
-        coverProvider: AlbumMemoryCoverProvider(coverFile: file),
-        sortProvider: const AlbumTimeSortProvider(isAscending: false),
-        lastUpdated: DateTime(2021),
+        contentProvider: CollectionMemoryProvider(
+            account: account, year: 2021, month: 5, day: 15, cover: file),
       ),
     ],
   );
@@ -428,8 +388,9 @@ void _onMay15AddMay15Range0() {
 /// File: 2021-05-16
 /// Expect: []
 void _onMay15AddMay16Range0() {
+  final account = util.buildAccount();
   final today = DateTime(2022, 5, 15);
-  final obj = MemoryAlbumHelper(today: today, dayRange: 0);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: 0);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2021, 5, 16));
   obj.addFile(file);
@@ -442,8 +403,9 @@ void _onMay15AddMay16Range0() {
 /// File: 2021-05-16
 /// Expect: []
 void _onMay15AddMay16RangeNegative() {
+  final account = util.buildAccount();
   final today = DateTime(2022, 5, 15);
-  final obj = MemoryAlbumHelper(today: today, dayRange: -1);
+  final obj = MemoryCollectionHelper(account, today: today, dayRange: -1);
   final file = util.buildJpegFile(
       path: "", fileId: 0, lastModified: DateTime.utc(2021, 5, 16));
   obj.addFile(file);