fix(mobile): delete assets on trash empty, Android (#26070)

* fix(mobile): improve trash sync flow
- trash local assets on remote delete events
- unify remote trash handling and support assetDelete cleanup by remote asset id
- update sync stream tests

* fix(mobile): revert pubspec.lock

* refactor(mobile): remove helper
remove unused columns from results

* refactor(mobile): use remoteIds in getAssetsFromBackupAlbums and remove getAssetsFromBackupAlbumsByRemoteIds
refactor tests

---------

Co-authored-by: Peter Ombodi <peter.ombodi@gmail.com>

mobile/lib/domain/services/sync_stream.service.dart

@@ -3,6 +3,7 @@
 import 'dart:async';
 import 'dart:convert';
 
+import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/domain/models/store.model.dart';
 import 'package:immich_mobile/domain/models/sync_event.model.dart';
 import 'package:immich_mobile/entities/store.entity.dart';
@@ -191,17 +192,22 @@ class SyncStreamService {
       case SyncEntityType.assetV1:
         final remoteSyncAssets = data.cast<SyncAssetV1>();
         await _syncStreamRepository.updateAssetsV1(remoteSyncAssets);
-        if (CurrentPlatform.isAndroid && Store.get(StoreKey.manageLocalMediaAndroid, false)) {
-          final hasPermission = await _localFilesManager.hasManageMediaPermission();
-          if (hasPermission) {
-            await _handleRemoteTrashed(remoteSyncAssets.where((e) => e.deletedAt != null).map((e) => e.checksum));
+        await _runWithManageMediaPermission(
+          logContext: "Trashed Assets",
+          action: () async {
+            await _handleRemoteDeleted(remoteSyncAssets.where((e) => e.deletedAt != null).map((e) => e.id));
             await _applyRemoteRestoreToLocal();
-          } else {
-            _logger.warning("sync Trashed Assets cannot proceed because MANAGE_MEDIA permission is missing");
-          }
-        }
+          },
+        );
         return;
       case SyncEntityType.assetDeleteV1:
+        await _runWithManageMediaPermission(
+          logContext: "Deleted Assets",
+          action: () async {
+            final remoteSyncAssets = data.cast<SyncAssetDeleteV1>();
+            await _handleRemoteDeleted(remoteSyncAssets.map((e) => e.assetId));
+          },
+        );
         return _syncStreamRepository.deleteAssetsV1(data.cast());
       case SyncEntityType.assetExifV1:
         return _syncStreamRepository.updateAssetsExifV1(data.cast());
@@ -382,12 +388,20 @@ class SyncStreamService {
     }
   }
 
-  Future<void> _handleRemoteTrashed(Iterable<String> checksums) async {
-    if (checksums.isEmpty) {
+  Future<void> _handleRemoteDeleted(Iterable<String> remoteIds) async {
+    if (remoteIds.isEmpty) {
       return Future.value();
     } else {
-      final localAssetsToTrash = await _localAssetRepository.getAssetsFromBackupAlbums(checksums);
+      final localAssetsToTrash = await _localAssetRepository.getAssetsFromBackupAlbums(remoteIds);
       if (localAssetsToTrash.isNotEmpty) {
+        await _trashLocalAssets(localAssetsToTrash);
+      } else {
+        _logger.info("No assets found in backup-enabled albums for remote assets: $remoteIds");
+      }
+    }
+  }
+
+  Future<void> _trashLocalAssets(Map<String, List<LocalAsset>> localAssetsToTrash) async {
     final mediaUrls = await Future.wait(
       localAssetsToTrash.values
           .expand((e) => e)
@@ -398,10 +412,6 @@ class SyncStreamService {
     if (result) {
       await _trashedLocalAssetRepository.trashLocalAsset(localAssetsToTrash);
     }
-      } else {
-        _logger.info("No assets found in backup-enabled albums for assets: $checksums");
-      }
-    }
   }
 
   Future<void> _applyRemoteRestoreToLocal() async {
@@ -413,4 +423,21 @@ class SyncStreamService {
       _logger.info("No remote assets found for restoration");
     }
   }
+
+  Future<void> _runWithManageMediaPermission({
+    required String logContext,
+    required Future<void> Function() action,
+  }) async {
+    if (!CurrentPlatform.isAndroid || !Store.get(StoreKey.manageLocalMediaAndroid, false)) {
+      return;
+    }
+
+    final hasPermission = await _localFilesManager.hasManageMediaPermission();
+    if (!hasPermission) {
+      _logger.warning("sync $logContext cannot proceed because MANAGE_MEDIA permission is missing");
+      return;
+    }
+
+    await action();
+  }
 }

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

@@ -109,31 +109,40 @@ class DriftLocalAssetRepository extends DriftDatabaseRepository {
     return query.map((localAlbum) => localAlbum.toDto()).get();
   }
 
-  Future<Map<String, List<LocalAsset>>> getAssetsFromBackupAlbums(Iterable<String> checksums) async {
-    if (checksums.isEmpty) {
+  Future<Map<String, List<LocalAsset>>> getAssetsFromBackupAlbums(Iterable<String> remoteIds) async {
+    if (remoteIds.isEmpty) {
       return {};
     }
 
     final result = <String, List<LocalAsset>>{};
 
-    for (final slice in checksums.toSet().slices(kDriftMaxChunk)) {
+    for (final slice in remoteIds.toSet().slices(kDriftMaxChunk)) {
       final rows =
           await (_db.select(_db.localAlbumAssetEntity).join([
-                innerJoin(_db.localAlbumEntity, _db.localAlbumAssetEntity.albumId.equalsExp(_db.localAlbumEntity.id)),
+                innerJoin(
+                  _db.localAlbumEntity,
+                  _db.localAlbumAssetEntity.albumId.equalsExp(_db.localAlbumEntity.id),
+                  useColumns: false,
+                ),
                 innerJoin(_db.localAssetEntity, _db.localAlbumAssetEntity.assetId.equalsExp(_db.localAssetEntity.id)),
+                innerJoin(
+                  _db.remoteAssetEntity,
+                  _db.localAssetEntity.checksum.equalsExp(_db.remoteAssetEntity.checksum),
+                  useColumns: false,
+                ),
               ])..where(
                 _db.localAlbumEntity.backupSelection.equalsValue(BackupSelection.selected) &
-                    _db.localAssetEntity.checksum.isIn(slice),
+                    _db.remoteAssetEntity.id.isIn(slice),
               ))
               .get();
 
       for (final row in rows) {
         final albumId = row.readTable(_db.localAlbumAssetEntity).albumId;
-        final assetData = row.readTable(_db.localAssetEntity);
-        final asset = assetData.toDto();
+        final asset = row.readTable(_db.localAssetEntity).toDto();
         (result[albumId] ??= <LocalAsset>[]).add(asset);
       }
     }
+
     return result;
   }
 

mobile/test/domain/services/sync_stream_service_test.dart

@@ -419,8 +419,8 @@ void main() {
         'album-b': [mergedAsset],
       };
       when(() => mockLocalAssetRepo.getAssetsFromBackupAlbums(any())).thenAnswer((invocation) async {
-        final Iterable<String> requestedChecksums = invocation.positionalArguments.first as Iterable<String>;
-        expect(requestedChecksums.toSet(), equals({'checksum-local', 'checksum-merged', 'checksum-remote-only'}));
+        final Iterable<String> requestedRemoteIds = invocation.positionalArguments.first as Iterable<String>;
+        expect(requestedRemoteIds.toSet(), equals({'remote-1', 'remote-2', 'remote-3'}));
         return assetsByAlbum;
       });
 
@@ -482,12 +482,18 @@ void main() {
       verifyNever(() => mockTrashedLocalAssetRepo.trashLocalAsset(any()));
     });
 
-    test("does not request local deletions for permanent remote delete events", () async {
+    test("requests local deletions lookup by remote ids for permanent remote delete events", () async {
+      when(() => mockLocalAssetRepo.getAssetsFromBackupAlbums(any())).thenAnswer((invocation) async {
+        final Iterable<String> requestedRemoteIds = invocation.positionalArguments.first as Iterable<String>;
+        expect(requestedRemoteIds.toSet(), equals({'remote-asset'}));
+        return {};
+      });
+
       final events = [SyncStreamStub.assetDeleteV1];
 
       await simulateEvents(events);
 
-      verifyNever(() => mockLocalAssetRepo.getAssetsFromBackupAlbums(any()));
+      verify(() => mockLocalAssetRepo.getAssetsFromBackupAlbums(any())).called(1);
       verifyNever(() => mockLocalFilesManagerRepo.moveToTrash(any()));
       verify(() => mockSyncStreamRepo.deleteAssetsV1(any())).called(1);
     });