Refactoring: extract add items to album

lib/use_case/add_to_album.dart

@@ -0,0 +1,24 @@
+import 'package:nc_photos/account.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/use_case/update_album.dart';
+
+class AddToAlbum {
+  AddToAlbum(this.albumRepo);
+
+  /// Add a list of AlbumItems to [album]
+  Future<void> call(Account account, Album album, List<AlbumItem> items) =>
+      UpdateAlbum(albumRepo)(
+          account,
+          album.copyWith(
+            provider: AlbumStaticProvider(
+              items: makeDistinctAlbumItems([
+                ...items,
+                ...AlbumStaticProvider.of(album).items,
+              ]),
+            ),
+          ));
+
+  final AlbumRepo albumRepo;
+}

lib/widget/home_photos.dart

@@ -31,8 +31,8 @@ import 'package:nc_photos/primitive.dart';
 import 'package:nc_photos/share_handler.dart';
 import 'package:nc_photos/snack_bar_manager.dart';
 import 'package:nc_photos/theme.dart';
+import 'package:nc_photos/use_case/add_to_album.dart';
 import 'package:nc_photos/use_case/remove.dart';
-import 'package:nc_photos/use_case/update_album.dart';
 import 'package:nc_photos/use_case/update_property.dart';
 import 'package:nc_photos/widget/album_picker_dialog.dart';
 import 'package:nc_photos/widget/home_app_bar.dart';
@@ -409,16 +409,7 @@ class _HomePhotosState extends State<HomePhotos>
         .toList();
     try {
       final albumRepo = AlbumRepo(AlbumCachedDataSource());
-      await UpdateAlbum(albumRepo)(
+      await AddToAlbum(albumRepo)(widget.account, album, selected);
-          widget.account,
-          album.copyWith(
-            provider: AlbumStaticProvider(
-              items: makeDistinctAlbumItems([
-                ...selected,
-                ...AlbumStaticProvider.of(album).items,
-              ]),
-            ),
-          ));
     } catch (e, stacktrace) {
       _log.shout(
           "[_addSelectedToAlbum] Failed while updating album", e, stacktrace);

lib/widget/viewer_detail_pane.dart

@@ -27,6 +27,7 @@ import 'package:nc_photos/platform/features.dart' as features;
 import 'package:nc_photos/platform/k.dart' as platform_k;
 import 'package:nc_photos/snack_bar_manager.dart';
 import 'package:nc_photos/theme.dart';
+import 'package:nc_photos/use_case/add_to_album.dart';
 import 'package:nc_photos/use_case/update_album.dart';
 import 'package:nc_photos/use_case/update_property.dart';
 import 'package:nc_photos/widget/album_picker_dialog.dart';
@@ -503,16 +504,8 @@ class _ViewerDetailPaneState extends State<ViewerDetailPane> {
         ));
         return Future.error(ArgumentError("File already in album"));
       }
-      await UpdateAlbum(albumRepo)(
+      await AddToAlbum(albumRepo)(
-          widget.account,
+          widget.account, album, [AlbumFileItem(file: widget.file)]);
-          album.copyWith(
-            provider: AlbumStaticProvider(
-              items: [
-                AlbumFileItem(file: widget.file),
-                ...AlbumStaticProvider.of(album).items,
-              ],
-            ),
-          ));
     } catch (e, stacktrace) {
       _log.shout("[_addToAlbum] Failed while updating album", e, stacktrace);
       SnackBarManager().showSnackBar(SnackBar(