feat: show remainder assets info (#21114)

* feat: show remainder assets info

* pr feedback

mobile/lib/infrastructure/repositories/backup.repository.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:drift/drift.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/domain/models/album/local_album.model.dart';
@@ -135,4 +137,22 @@ class DriftBackupRepository extends DriftDatabaseRepository {
 
     return query.map((localAsset) => localAsset.toDto()).get();
   }
+
+  FutureOr<List<LocalAlbum>> getSourceAlbums(String localAssetId) {
+    final query = _db.localAlbumEntity.select()
+      ..where(
+        (lae) =>
+            existsQuery(
+              _db.localAlbumAssetEntity.selectOnly()
+                ..addColumns([_db.localAlbumAssetEntity.albumId])
+                ..where(
+                  _db.localAlbumAssetEntity.albumId.equalsExp(lae.id) &
+                      _db.localAlbumAssetEntity.assetId.equals(localAssetId),
+                ),
+            ) &
+            lae.backupSelection.equalsValue(BackupSelection.selected),
+      )
+      ..orderBy([(lae) => OrderingTerm.asc(lae.name)]);
+    return query.map((localAlbum) => localAlbum.toDto()).get();
+  }
 }