Refactor DeleteEmptyButtonWidget

lib/services/collections_service.dart

@@ -214,11 +214,6 @@ class CollectionsService {
         0;
   }
 
-  Future<List<File>> _getLatestCollectionFiles() {
-    _cachedLatestFiles ??= _filesDB.getLatestCollectionFiles();
-    return _cachedLatestFiles!;
-  }
-
   Future<Map<int, int>> getCollectionIDToNewestFileTime() {
     _collectionIDToNewestFileTime ??=
         _filesDB.getCollectionIDToMaxCreationTime();

lib/ui/tabs/user_collections_tab.dart

@@ -13,7 +13,6 @@ import 'package:photos/extensions/list.dart';
 import "package:photos/generated/l10n.dart";
 import 'package:photos/models/collection.dart';
 import 'package:photos/services/collections_service.dart';
-import "package:photos/services/remote_sync_service.dart";
 import "package:photos/ui/collections/button/archived_button.dart";
 import "package:photos/ui/collections/button/hidden_button.dart";
 import "package:photos/ui/collections/button/trash_button.dart";
@@ -136,8 +135,6 @@ class _UserCollectionsTabState extends State<UserCollectionsTab>
   Widget _getCollectionsGalleryWidget(
     List<Collection>? collections,
   ) {
-    final bool showDeleteAlbumsButton =
-        RemoteSyncService.instance.isFirstRemoteSyncDone();
     final TextStyle trashAndHiddenTextStyle =
         Theme.of(context).textTheme.titleMedium!.copyWith(
               color: Theme.of(context)
@@ -163,12 +160,7 @@ class _UserCollectionsTabState extends State<UserCollectionsTab>
                 _sortMenu(),
               ],
             ),
-            showDeleteAlbumsButton
-                ? const Padding(
-                    padding: EdgeInsets.only(top: 2, left: 8.5, right: 48),
-                    child: DeleteEmptyAlbums(),
-                  )
-                : const SizedBox.shrink(),
+            DeleteEmptyAlbums(collections ?? []),
             Configuration.instance.hasConfiguredAccount()
                 ? RemoteCollectionsGridViewWidget(collections)
                 : const EmptyState(),

lib/ui/viewer/actions/delete_empty_albums.dart

@@ -6,12 +6,14 @@ import "package:photos/generated/l10n.dart";
 import 'package:photos/models/collection.dart';
 import 'package:photos/models/file.dart';
 import 'package:photos/services/collections_service.dart';
+import "package:photos/services/remote_sync_service.dart";
 import 'package:photos/ui/components/action_sheet_widget.dart';
 import 'package:photos/ui/components/buttons/button_widget.dart';
 import 'package:photos/ui/components/models/button_type.dart';
 
 class DeleteEmptyAlbums extends StatefulWidget {
-  const DeleteEmptyAlbums({Key? key}) : super(key: key);
+  final List<Collection> collections;
+  const DeleteEmptyAlbums(this.collections, {Key? key}) : super(key: key);
 
   @override
   State<DeleteEmptyAlbums> createState() => _DeleteEmptyAlbumsState();
@@ -27,10 +29,39 @@ class _DeleteEmptyAlbumsState extends State<DeleteEmptyAlbums> {
     super.dispose();
   }
 
+  Future<bool> _showDeleteButton() async {
+    if (!RemoteSyncService.instance.isFirstRemoteSyncDone()) {
+      return Future.value(false);
+    }
+    final Map<int, int> collectionIDToLatestTimeCount =
+        await CollectionsService.instance.getCollectionIDToNewestFileTime();
+    final emptyAlbumCount = widget.collections
+        .where((collection) {
+          final latestTimeCount = collectionIDToLatestTimeCount[collection.id];
+          return latestTimeCount == null;
+        })
+        .toList()
+        .length;
+    debugPrint("Empty albums count $emptyAlbumCount");
+    return emptyAlbumCount > 2;
+  }
+
   @override
   Widget build(BuildContext context) {
+    return FutureBuilder<bool>(
+      future: _showDeleteButton(),
+      builder: (context, snapshot) {
+        if (snapshot.hasData && snapshot.data!) {
+          return _buildDeleteButton();
+        }
+        return const SizedBox.shrink();
+      },
+    );
+  }
+
+  Widget _buildDeleteButton() {
     return Padding(
-      padding: const EdgeInsets.fromLTRB(0, 2, 8, 12),
+      padding: const EdgeInsets.fromLTRB(8.5, 4, 8, 12),
       child: Align(
         alignment: Alignment.centerLeft,
         child: ButtonWidget(