feat(mobile) duplicated asset upload handling mechanism (#853)

mobile/assets/i18n/de-DE.json

@@ -24,6 +24,7 @@
   "backup_controller_page_backup_selected": "Ausgewählt: ",
   "backup_controller_page_backup_sub": "Gesicherte Fotos und Videos",
   "backup_controller_page_cancel": "Abbrechen",
+  "backup_background_service_default_notification": "Suche nach neuen assets…",
   "backup_controller_page_created": "Erstellt: {}",
   "backup_controller_page_desc_backup": "Aktiviere die Sicherung um Elemente automatisch auf den Server zu laden.",
   "backup_controller_page_excluded": "Ausgeschlossen: ",

mobile/lib/constants/hive_box.dart

@@ -25,3 +25,7 @@ const String backgroundBackupInfoBox = "immichBackgroundBackupInfoBox"; // Box
 const String backupFailedSince = "immichBackupFailedSince"; // Key 1
 const String backupRequireWifi = "immichBackupRequireWifi"; // Key 2
 const String backupRequireCharging = "immichBackupRequireCharging"; // Key 3
+
+// Duplicate asset
+const String duplicatedAssetsBox = "immichDuplicatedAssetsBox"; // Box
+const String duplicatedAssetsKey = "immichDuplicatedAssetsKey"; // Key 1

mobile/lib/main.dart

@@ -10,6 +10,7 @@ import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/constants/locales.dart';
 import 'package:immich_mobile/modules/backup/background_service/background.service.dart';
 import 'package:immich_mobile/modules/backup/models/hive_backup_albums.model.dart';
+import 'package:immich_mobile/modules/backup/models/hive_duplicated_assets.model.dart';
 import 'package:immich_mobile/modules/backup/providers/backup.provider.dart';
 import 'package:immich_mobile/modules/login/models/hive_saved_login_info.model.dart';
 import 'package:immich_mobile/modules/login/providers/authentication.provider.dart';
@@ -30,12 +31,14 @@ void main() async {
 
   Hive.registerAdapter(HiveSavedLoginInfoAdapter());
   Hive.registerAdapter(HiveBackupAlbumsAdapter());
+  Hive.registerAdapter(HiveDuplicatedAssetsAdapter());
 
   await Hive.openBox(userInfoBox);
   await Hive.openBox<HiveSavedLoginInfo>(hiveLoginInfoBox);
   await Hive.openBox<HiveBackupAlbums>(hiveBackupInfoBox);
   await Hive.openBox(hiveGithubReleaseInfoBox);
   await Hive.openBox(userSettingInfoBox);
+  await Hive.openBox<HiveDuplicatedAssets>(duplicatedAssetsBox);
 
   SystemChrome.setSystemUIOverlayStyle(
     const SystemUiOverlayStyle(

mobile/lib/modules/backup/background_service/background.service.dart

@@ -14,6 +14,7 @@ import 'package:immich_mobile/modules/backup/background_service/localization.dar
 import 'package:immich_mobile/modules/backup/models/current_upload_asset.model.dart';
 import 'package:immich_mobile/modules/backup/models/error_upload_asset.model.dart';
 import 'package:immich_mobile/modules/backup/models/hive_backup_albums.model.dart';
+import 'package:immich_mobile/modules/backup/models/hive_duplicated_assets.model.dart';
 import 'package:immich_mobile/modules/backup/services/backup.service.dart';
 import 'package:immich_mobile/modules/login/models/hive_saved_login_info.model.dart';
 import 'package:immich_mobile/modules/settings/services/app_settings.service.dart';
@@ -316,10 +317,13 @@ class BackgroundService {
 
     Hive.registerAdapter(HiveSavedLoginInfoAdapter());
     Hive.registerAdapter(HiveBackupAlbumsAdapter());
+    Hive.registerAdapter(HiveDuplicatedAssetsAdapter());
+
     await Hive.openBox(userInfoBox);
     await Hive.openBox<HiveSavedLoginInfo>(hiveLoginInfoBox);
     await Hive.openBox(userSettingInfoBox);
     await Hive.openBox(backgroundBackupInfoBox);
+    await Hive.openBox<HiveDuplicatedAssets>(duplicatedAssetsBox);
 
     ApiService apiService = ApiService();
     apiService.setEndpoint(Hive.box(userInfoBox).get(serverEndpointKey));
@@ -410,7 +414,7 @@ class BackgroundService {
     final bool ok = await backupService.backupAsset(
       toUpload,
       _cancellationToken!,
-      notifyTotalProgress ? _onAssetUploaded : (assetId, deviceId) {},
+      notifyTotalProgress ? _onAssetUploaded : (assetId, deviceId, isDup) {},
       notifySingleProgress ? _onProgress : (sent, total) {},
       notifySingleProgress ? _onSetCurrentBackupAsset : (asset) {},
       _onBackupError,
@@ -429,7 +433,7 @@ class BackgroundService {
     return "$percent% ($_uploadedAssetsCount/$_assetsToUploadCount)";
   }
 
-  void _onAssetUploaded(String deviceAssetId, String deviceId) {
+  void _onAssetUploaded(String deviceAssetId, String deviceId, bool isDup) {
     debugPrint("Uploaded $deviceAssetId from $deviceId");
     _uploadedAssetsCount++;
     _updateNotification(

mobile/lib/modules/backup/models/error_upload_asset.model.dart

@@ -45,8 +45,10 @@ class ErrorUploadAsset extends Equatable {
   List<Object> get props {
     return [
       id,
+      createdAt,
       fileName,
       fileType,
+      asset,
       errorMessage,
     ];
   }

mobile/lib/modules/backup/models/hive_duplicated_assets.model.dart

@@ -0,0 +1,57 @@
+import 'dart:convert';
+
+import 'package:collection/collection.dart';
+import 'package:hive/hive.dart';
+
+part 'hive_duplicated_assets.model.g.dart';
+
+@HiveType(typeId: 2)
+class HiveDuplicatedAssets {
+  @HiveField(0, defaultValue: [])
+  List<String> duplicatedAssetIds;
+
+  HiveDuplicatedAssets({
+    required this.duplicatedAssetIds,
+  });
+
+  HiveDuplicatedAssets copyWith({
+    List<String>? duplicatedAssetIds,
+  }) {
+    return HiveDuplicatedAssets(
+      duplicatedAssetIds: duplicatedAssetIds ?? this.duplicatedAssetIds,
+    );
+  }
+
+  Map<String, dynamic> toMap() {
+    return {
+      'duplicatedAssetIds': duplicatedAssetIds,
+    };
+  }
+
+  factory HiveDuplicatedAssets.fromMap(Map<String, dynamic> map) {
+    return HiveDuplicatedAssets(
+      duplicatedAssetIds: List<String>.from(map['duplicatedAssetIds']),
+    );
+  }
+
+  String toJson() => json.encode(toMap());
+
+  factory HiveDuplicatedAssets.fromJson(String source) =>
+      HiveDuplicatedAssets.fromMap(json.decode(source));
+
+  @override
+  String toString() =>
+      'HiveDuplicatedAssets(duplicatedAssetIds: $duplicatedAssetIds)';
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    final listEquals = const DeepCollectionEquality().equals;
+
+    return other is HiveDuplicatedAssets &&
+        listEquals(other.duplicatedAssetIds, duplicatedAssetIds);
+  }
+
+  @override
+  int get hashCode => duplicatedAssetIds.hashCode;
+}

mobile/lib/modules/backup/providers/backup.provider.dart

@@ -10,6 +10,7 @@ import 'package:immich_mobile/modules/backup/models/backup_state.model.dart';
 import 'package:immich_mobile/modules/backup/models/current_upload_asset.model.dart';
 import 'package:immich_mobile/modules/backup/models/error_upload_asset.model.dart';
 import 'package:immich_mobile/modules/backup/models/hive_backup_albums.model.dart';
+import 'package:immich_mobile/modules/backup/models/hive_duplicated_assets.model.dart';
 import 'package:immich_mobile/modules/backup/providers/error_backup_list.provider.dart';
 import 'package:immich_mobile/modules/backup/background_service/background.service.dart';
 import 'package:immich_mobile/modules/backup/services/backup.service.dart';
@@ -296,6 +297,7 @@ class BackupNotifier extends StateNotifier<BackUpState> {
   /// Those assets are unique and are used as the total assets
   ///
   Future<void> _updateBackupAssetCount() async {
+    Set<String> duplicatedAssetIds = _backupService.getDuplicatedAssetIds();
     Set<AssetEntity> assetsFromSelectedAlbums = {};
     Set<AssetEntity> assetsFromExcludedAlbums = {};
 
@@ -326,9 +328,15 @@ class BackupNotifier extends StateNotifier<BackUpState> {
     // Find asset that were backup from selected albums
     Set<String> selectedAlbumsBackupAssets =
         Set.from(allUniqueAssets.map((e) => e.id));
+
     selectedAlbumsBackupAssets
         .removeWhere((assetId) => !allAssetsInDatabase.contains(assetId));
 
+    // Remove duplicated asset from all unique assets
+    allUniqueAssets.removeWhere(
+      (asset) => duplicatedAssetIds.contains(asset.id),
+    );
+
     if (allUniqueAssets.isEmpty) {
       debugPrint("No Asset On Device");
       state = state.copyWith(
@@ -455,7 +463,18 @@ class BackupNotifier extends StateNotifier<BackUpState> {
     );
   }
 
-  void _onAssetUploaded(String deviceAssetId, String deviceId) {
+  void _onAssetUploaded(
+    String deviceAssetId,
+    String deviceId,
+    bool isDuplicated,
+  ) {
+    if (isDuplicated) {
+      state = state.copyWith(
+        allUniqueAssets: state.allUniqueAssets
+            .where((asset) => asset.id != deviceAssetId)
+            .toSet(),
+      );
+    } else {
       state = state.copyWith(
         selectedAlbumsBackupAssetsIds: {
           ...state.selectedAlbumsBackupAssetsIds,
@@ -463,6 +482,7 @@ class BackupNotifier extends StateNotifier<BackUpState> {
         },
         allAssetsInDatabase: [...state.allAssetsInDatabase, deviceAssetId],
       );
+    }
 
     if (state.allUniqueAssets.length -
             state.selectedAlbumsBackupAssetsIds.length ==
@@ -564,6 +584,7 @@ class BackupNotifier extends StateNotifier<BackUpState> {
           albums.lastExcludedBackupTime,
         );
       }
+      await Hive.openBox<HiveDuplicatedAssets>(duplicatedAssetsBox);
       final Box backgroundBox = await Hive.openBox(backgroundBackupInfoBox);
       state = state.copyWith(
         backupProgress: previous,
@@ -608,6 +629,13 @@ class BackupNotifier extends StateNotifier<BackUpState> {
       } catch (error) {
         debugPrint("[_notifyBackgroundServiceCanRun] failed to close box");
       }
+      try {
+        if (Hive.isBoxOpen(duplicatedAssetsBox)) {
+          await Hive.box<HiveDuplicatedAssets>(duplicatedAssetsBox).close();
+        }
+      } catch (error) {
+        debugPrint("[_notifyBackgroundServiceCanRun] failed to close box");
+      }
       try {
         if (Hive.isBoxOpen(backgroundBackupInfoBox)) {
           await Hive.box(backgroundBackupInfoBox).close();

mobile/lib/modules/backup/services/backup.service.dart

@@ -19,6 +19,8 @@ import 'package:http_parser/http_parser.dart';
 import 'package:path/path.dart' as p;
 import 'package:cancellation_token_http/http.dart' as http;
 
+import '../models/hive_duplicated_assets.model.dart';
+
 final backupServiceProvider = Provider(
   (ref) => BackupService(
     ref.watch(apiServiceProvider),
@@ -41,6 +43,29 @@ class BackupService {
     }
   }
 
+  void _saveDuplicatedAssetIdToLocalStorage(List<String> deviceAssetIds) {
+    HiveDuplicatedAssets duplicatedAssets =
+        Hive.box<HiveDuplicatedAssets>(duplicatedAssetsBox)
+                .get(duplicatedAssetsKey) ??
+            HiveDuplicatedAssets(duplicatedAssetIds: []);
+
+    duplicatedAssets.duplicatedAssetIds =
+        {...duplicatedAssets.duplicatedAssetIds, ...deviceAssetIds}.toList();
+
+    Hive.box<HiveDuplicatedAssets>(duplicatedAssetsBox)
+        .put(duplicatedAssetsKey, duplicatedAssets);
+  }
+
+  /// Get duplicated asset id from Hive storage
+  Set<String> getDuplicatedAssetIds() {
+    HiveDuplicatedAssets duplicatedAssets =
+        Hive.box<HiveDuplicatedAssets>(duplicatedAssetsBox)
+                .get(duplicatedAssetsKey) ??
+            HiveDuplicatedAssets(duplicatedAssetIds: []);
+
+    return duplicatedAssets.duplicatedAssetIds.toSet();
+  }
+
   /// Returns all assets newer than the last successful backup per album
   Future<List<AssetEntity>> buildUploadCandidates(
     HiveBackupAlbums backupAlbums,
@@ -140,34 +165,47 @@ class BackupService {
   Future<List<AssetEntity>> removeAlreadyUploadedAssets(
     List<AssetEntity> candidates,
   ) async {
-    final String deviceId = Hive.box(userInfoBox).get(deviceIdKey);
+    if (candidates.isEmpty) {
-    if (candidates.length < 10) {
-      final List<CheckDuplicateAssetResponseDto?> duplicateResponse =
-          await Future.wait(
-        candidates.map(
-          (e) => _apiService.assetApi.checkDuplicateAsset(
-            CheckDuplicateAssetDto(deviceAssetId: e.id, deviceId: deviceId),
-          ),
-        ),
-      );
-      return candidates
-          .whereIndexed((i, e) => duplicateResponse[i]?.isExist == false)
-          .toList();
-    } else {
-      final List<String>? allAssetsInDatabase = await getDeviceBackupAsset();
-
-      if (allAssetsInDatabase == null) {
       return candidates;
     }
-      final Set<String> inDb = allAssetsInDatabase.toSet();
+    final Set<String> duplicatedAssetIds = getDuplicatedAssetIds();
-      return candidates.whereNot((e) => inDb.contains(e.id)).toList();
+    candidates = duplicatedAssetIds.isEmpty
+        ? candidates
+        : candidates
+            .whereNot((asset) => duplicatedAssetIds.contains(asset.id))
+            .toList();
+    if (candidates.isEmpty) {
+      return candidates;
     }
+    final Set<String> existing = {};
+    try {
+      final String deviceId = Hive.box(userInfoBox).get(deviceIdKey);
+      final CheckExistingAssetsResponseDto? duplicates =
+          await _apiService.assetApi.checkExistingAssets(
+        CheckExistingAssetsDto(
+          deviceAssetIds: candidates.map((e) => e.id).toList(),
+          deviceId: deviceId,
+        ),
+      );
+      if (duplicates != null) {
+        existing.addAll(duplicates.existingIds);
+      }
+    } on ApiException {
+      // workaround for older server versions or when checking for too many assets at once
+      final List<String>? allAssetsInDatabase = await getDeviceBackupAsset();
+      if (allAssetsInDatabase != null) {
+        existing.addAll(allAssetsInDatabase);
+      }
+    }
+    return existing.isEmpty
+        ? candidates
+        : candidates.whereNot((e) => existing.contains(e.id)).toList();
   }
 
   Future<bool> backupAsset(
     Iterable<AssetEntity> assetList,
     http.CancellationToken cancelToken,
-    Function(String, String) singleAssetDoneCb,
+    Function(String, String, bool) uploadSuccessCb,
     Function(int, int) uploadProgressCb,
     Function(CurrentUploadAsset) setCurrentUploadAssetCb,
     Function(ErrorUploadAsset) errorCb,
@@ -176,6 +214,7 @@ class BackupService {
     String savedEndpoint = Hive.box(userInfoBox).get(serverEndpointKey);
     File? file;
     bool anyErrors = false;
+    final List<String> duplicatedAssetIds = [];
 
     for (var entity in assetList) {
       try {
@@ -235,8 +274,13 @@ class BackupService {
 
           var response = await req.send(cancellationToken: cancelToken);
 
-          if (response.statusCode == 201) {
+          if (response.statusCode == 200) {
-            singleAssetDoneCb(entity.id, deviceId);
+            // asset is a duplicate (already exists on the server)
+            duplicatedAssetIds.add(entity.id);
+            uploadSuccessCb(entity.id, deviceId, true);
+          } else if (response.statusCode == 201) {
+            // stored a new asset on the server
+            uploadSuccessCb(entity.id, deviceId, false);
           } else {
             var data = await response.stream.bytesToString();
             var error = jsonDecode(data);
@@ -260,7 +304,8 @@ class BackupService {
         }
       } on http.CancelledException {
         debugPrint("Backup was cancelled by the user");
-        return false;
+        anyErrors = true;
+        break;
       } catch (e) {
         debugPrint("ERROR backupAsset: ${e.toString()}");
         anyErrors = true;
@@ -271,6 +316,9 @@ class BackupService {
         }
       }
     }
+    if (duplicatedAssetIds.isNotEmpty) {
+      _saveDuplicatedAssetIdToLocalStorage(duplicatedAssetIds);
+    }
     return !anyErrors;
   }
 

mobile/lib/modules/backup/views/backup_controller_page.dart

@@ -419,7 +419,6 @@ class BackupControllerPage extends HookConsumerWidget {
               ActionChip(
                 avatar: Icon(
                   Icons.info,
-                  size: 24,
                   color: Colors.red[400],
                 ),
                 elevation: 1,

mobile/openapi/.openapi-generator/FILES

@@ -19,6 +19,8 @@ doc/AssetTypeEnum.md
 doc/AuthenticationApi.md
 doc/CheckDuplicateAssetDto.md
 doc/CheckDuplicateAssetResponseDto.md
+doc/CheckExistingAssetsDto.md
+doc/CheckExistingAssetsResponseDto.md
 doc/CreateAlbumDto.md
 doc/CreateDeviceInfoDto.md
 doc/CreateProfileImageResponseDto.md
@@ -93,6 +95,8 @@ lib/model/asset_response_dto.dart
 lib/model/asset_type_enum.dart
 lib/model/check_duplicate_asset_dto.dart
 lib/model/check_duplicate_asset_response_dto.dart
+lib/model/check_existing_assets_dto.dart
+lib/model/check_existing_assets_response_dto.dart
 lib/model/create_album_dto.dart
 lib/model/create_device_info_dto.dart
 lib/model/create_profile_image_response_dto.dart
@@ -133,3 +137,5 @@ lib/model/user_count_response_dto.dart
 lib/model/user_response_dto.dart
 lib/model/validate_access_token_response_dto.dart
 pubspec.yaml
+test/check_existing_assets_dto_test.dart
+test/check_existing_assets_response_dto_test.dart

server/apps/immich/src/api-v1/album/album.service.spec.ts

@@ -137,6 +137,7 @@ describe('Album service', () => {
       getAssetWithNoEXIF: jest.fn(),
       getAssetWithNoThumbnail: jest.fn(),
       getAssetWithNoSmartInfo: jest.fn(),
+      getExistingAssets: jest.fn(),
     };
 
     sut = new AlbumService(albumRepositoryMock, assetRepositoryMock);

server/apps/immich/src/api-v1/asset/asset-repository.ts

@@ -10,6 +10,9 @@ import { AssetCountByTimeBucket } from './response-dto/asset-count-by-time-group
 import { TimeGroupEnum } from './dto/get-asset-count-by-time-bucket.dto';
 import { GetAssetByTimeBucketDto } from './dto/get-asset-by-time-bucket.dto';
 import { AssetCountByUserIdResponseDto } from './response-dto/asset-count-by-user-id-response.dto';
+import { CheckExistingAssetsDto } from './dto/check-existing-assets.dto';
+import { CheckExistingAssetsResponseDto } from './response-dto/check-existing-assets-response.dto';
+import { In } from 'typeorm/find-options/operator/In';
 
 export interface IAssetRepository {
   create(
@@ -32,6 +35,7 @@ export interface IAssetRepository {
   getAssetWithNoThumbnail(): Promise<AssetEntity[]>;
   getAssetWithNoEXIF(): Promise<AssetEntity[]>;
   getAssetWithNoSmartInfo(): Promise<AssetEntity[]>;
+  getExistingAssets(userId: string, checkDuplicateAssetDto: CheckExistingAssetsDto): Promise<CheckExistingAssetsResponseDto>;
 }
 
 export const ASSET_REPOSITORY = 'ASSET_REPOSITORY';
@@ -279,4 +283,17 @@ export class AssetRepository implements IAssetRepository {
       relations: ['exifInfo'],
     });
   }
+
+  async getExistingAssets(userId: string, checkDuplicateAssetDto: CheckExistingAssetsDto): Promise<CheckExistingAssetsResponseDto> {
+    const existingAssets = await this.assetRepository.find({
+      select: {deviceAssetId: true},
+      where: {
+        deviceAssetId: In(checkDuplicateAssetDto.deviceAssetIds),
+        deviceId: checkDuplicateAssetDto.deviceId,
+        userId,
+      },
+    });
+    return new CheckExistingAssetsResponseDto(existingAssets.map(a => a.deviceAssetId));
+  }
+
 }

server/apps/immich/src/api-v1/asset/asset.controller.ts

@@ -48,6 +48,8 @@ import { GetAssetCountByTimeBucketDto } from './dto/get-asset-count-by-time-buck
 import { GetAssetByTimeBucketDto } from './dto/get-asset-by-time-bucket.dto';
 import { QueryFailedError } from 'typeorm';
 import { AssetCountByUserIdResponseDto } from './response-dto/asset-count-by-user-id-response.dto';
+import { CheckExistingAssetsDto } from './dto/check-existing-assets.dto';
+import { CheckExistingAssetsResponseDto } from './response-dto/check-existing-assets-response.dto';
 
 @UseGuards(JwtAuthGuard)
 @ApiBearerAuth()
@@ -74,6 +76,7 @@ export class AssetController {
     @GetAuthUser() authUser: AuthUserDto,
     @UploadedFile() file: Express.Multer.File,
     @Body(ValidationPipe) assetInfo: CreateAssetDto,
+    @Response({ passthrough: true }) res: Res,
   ): Promise<AssetFileUploadResponseDto> {
     const checksum = await this.assetService.calculateChecksum(file.path);
 
@@ -111,6 +114,7 @@ export class AssetController {
 
       if (err instanceof QueryFailedError && (err as any).constraint === 'UQ_userid_checksum') {
         const existedAsset = await this.assetService.getAssetByChecksum(authUser.id, checksum);
+        res.status(200); // normal POST is 201. we use 200 to indicate the asset already exists
         return new AssetFileUploadResponseDto(existedAsset.id);
       }
 
@@ -254,4 +258,16 @@ export class AssetController {
   ): Promise<CheckDuplicateAssetResponseDto> {
     return await this.assetService.checkDuplicatedAsset(authUser, checkDuplicateAssetDto);
   }
+
+  /**
+   * Checks if multiple assets exist on the server and returns all existing - used by background backup 
+   */
+  @Post('/exist')
+  @HttpCode(200)
+  async checkExistingAssets(
+    @GetAuthUser() authUser: AuthUserDto,
+    @Body(ValidationPipe) checkExistingAssetsDto: CheckExistingAssetsDto,
+  ): Promise<CheckExistingAssetsResponseDto> {
+    return await this.assetService.checkExistingAssets(authUser, checkExistingAssetsDto);
+  }
 }

server/apps/immich/src/api-v1/asset/asset.service.spec.ts

@@ -110,6 +110,7 @@ describe('AssetService', () => {
       getAssetWithNoEXIF: jest.fn(),
       getAssetWithNoThumbnail: jest.fn(),
       getAssetWithNoSmartInfo: jest.fn(),
+      getExistingAssets: jest.fn(),
     };
 
     sui = new AssetService(assetRepositoryMock, a);

server/apps/immich/src/api-v1/asset/asset.service.ts

@@ -37,6 +37,8 @@ import { GetAssetCountByTimeBucketDto } from './dto/get-asset-count-by-time-buck
 import { GetAssetByTimeBucketDto } from './dto/get-asset-by-time-bucket.dto';
 import { AssetCountByUserIdResponseDto } from './response-dto/asset-count-by-user-id-response.dto';
 import { timeUtils } from '@app/common/utils';
+import { CheckExistingAssetsDto } from './dto/check-existing-assets.dto';
+import { CheckExistingAssetsResponseDto } from './response-dto/check-existing-assets-response.dto';
 
 const fileInfo = promisify(stat);
 
@@ -466,6 +468,13 @@ export class AssetService {
     return new CheckDuplicateAssetResponseDto(isDuplicated, res?.id);
   }
 
+  async checkExistingAssets(
+    authUser: AuthUserDto,
+    checkExistingAssetsDto: CheckExistingAssetsDto,
+  ): Promise<CheckExistingAssetsResponseDto> {
+    return this._assetRepository.getExistingAssets(authUser.id, checkExistingAssetsDto);
+  }
+
   async getAssetCountByTimeBucket(
     authUser: AuthUserDto,
     getAssetCountByTimeBucketDto: GetAssetCountByTimeBucketDto,

server/apps/immich/src/api-v1/asset/dto/check-existing-assets.dto.ts

@@ -0,0 +1,9 @@
+import { IsNotEmpty } from 'class-validator';
+
+export class CheckExistingAssetsDto {
+  @IsNotEmpty()
+  deviceAssetIds!: string[];
+
+  @IsNotEmpty()
+  deviceId!: string;
+}

server/apps/immich/src/api-v1/asset/response-dto/check-existing-assets-response.dto.ts

@@ -0,0 +1,7 @@
+export class CheckExistingAssetsResponseDto {
+    constructor(existingIds: string[]) {
+      this.existingIds = existingIds;
+    }
+    existingIds: string[];
+  }
+  

web/src/api/open-api/api.ts

@@ -452,6 +452,38 @@ export interface CheckDuplicateAssetResponseDto {
      */
     'id'?: string;
 }
+/**
+ * 
+ * @export
+ * @interface CheckExistingAssetsDto
+ */
+export interface CheckExistingAssetsDto {
+    /**
+     * 
+     * @type {Array<string>}
+     * @memberof CheckExistingAssetsDto
+     */
+    'deviceAssetIds': Array<string>;
+    /**
+     * 
+     * @type {string}
+     * @memberof CheckExistingAssetsDto
+     */
+    'deviceId': string;
+}
+/**
+ * 
+ * @export
+ * @interface CheckExistingAssetsResponseDto
+ */
+export interface CheckExistingAssetsResponseDto {
+    /**
+     * 
+     * @type {Array<string>}
+     * @memberof CheckExistingAssetsResponseDto
+     */
+    'existingIds': Array<string>;
+}
 /**
  * 
  * @export
@@ -2334,6 +2366,46 @@ export const AssetApiAxiosParamCreator = function (configuration?: Configuration
                 options: localVarRequestOptions,
             };
         },
+        /**
+         * Checks if multiple assets exist on the server and returns all existing - used by background backup
+         * @summary 
+         * @param {CheckExistingAssetsDto} checkExistingAssetsDto 
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        checkExistingAssets: async (checkExistingAssetsDto: CheckExistingAssetsDto, options: AxiosRequestConfig = {}): Promise<RequestArgs> => {
+            // verify required parameter 'checkExistingAssetsDto' is not null or undefined
+            assertParamExists('checkExistingAssets', 'checkExistingAssetsDto', checkExistingAssetsDto)
+            const localVarPath = `/asset/exist`;
+            // use dummy base URL string because the URL constructor only accepts absolute URLs.
+            const localVarUrlObj = new URL(localVarPath, DUMMY_BASE_URL);
+            let baseOptions;
+            if (configuration) {
+                baseOptions = configuration.baseOptions;
+            }
+
+            const localVarRequestOptions = { method: 'POST', ...baseOptions, ...options};
+            const localVarHeaderParameter = {} as any;
+            const localVarQueryParameter = {} as any;
+
+            // authentication bearer required
+            // http bearer authentication required
+            await setBearerAuthToObject(localVarHeaderParameter, configuration)
+
+
+    
+            localVarHeaderParameter['Content-Type'] = 'application/json';
+
+            setSearchParams(localVarUrlObj, localVarQueryParameter);
+            let headersFromBaseOptions = baseOptions && baseOptions.headers ? baseOptions.headers : {};
+            localVarRequestOptions.headers = {...localVarHeaderParameter, ...headersFromBaseOptions, ...options.headers};
+            localVarRequestOptions.data = serializeDataIfNeeded(checkExistingAssetsDto, localVarRequestOptions, configuration)
+
+            return {
+                url: toPathString(localVarUrlObj),
+                options: localVarRequestOptions,
+            };
+        },
         /**
          * 
          * @param {DeleteAssetDto} deleteAssetDto 
@@ -2953,6 +3025,17 @@ export const AssetApiFp = function(configuration?: Configuration) {
             const localVarAxiosArgs = await localVarAxiosParamCreator.checkDuplicateAsset(checkDuplicateAssetDto, options);
             return createRequestFunction(localVarAxiosArgs, globalAxios, BASE_PATH, configuration);
         },
+        /**
+         * Checks if multiple assets exist on the server and returns all existing - used by background backup
+         * @summary 
+         * @param {CheckExistingAssetsDto} checkExistingAssetsDto 
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        async checkExistingAssets(checkExistingAssetsDto: CheckExistingAssetsDto, options?: AxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<CheckExistingAssetsResponseDto>> {
+            const localVarAxiosArgs = await localVarAxiosParamCreator.checkExistingAssets(checkExistingAssetsDto, options);
+            return createRequestFunction(localVarAxiosArgs, globalAxios, BASE_PATH, configuration);
+        },
         /**
          * 
          * @param {DeleteAssetDto} deleteAssetDto 
@@ -3128,6 +3211,16 @@ export const AssetApiFactory = function (configuration?: Configuration, basePath
         checkDuplicateAsset(checkDuplicateAssetDto: CheckDuplicateAssetDto, options?: any): AxiosPromise<CheckDuplicateAssetResponseDto> {
             return localVarFp.checkDuplicateAsset(checkDuplicateAssetDto, options).then((request) => request(axios, basePath));
         },
+        /**
+         * Checks if multiple assets exist on the server and returns all existing - used by background backup
+         * @summary 
+         * @param {CheckExistingAssetsDto} checkExistingAssetsDto 
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        checkExistingAssets(checkExistingAssetsDto: CheckExistingAssetsDto, options?: any): AxiosPromise<CheckExistingAssetsResponseDto> {
+            return localVarFp.checkExistingAssets(checkExistingAssetsDto, options).then((request) => request(axios, basePath));
+        },
         /**
          * 
          * @param {DeleteAssetDto} deleteAssetDto 
@@ -3290,6 +3383,18 @@ export class AssetApi extends BaseAPI {
         return AssetApiFp(this.configuration).checkDuplicateAsset(checkDuplicateAssetDto, options).then((request) => request(this.axios, this.basePath));
     }
 
+    /**
+     * Checks if multiple assets exist on the server and returns all existing - used by background backup
+     * @summary 
+     * @param {CheckExistingAssetsDto} checkExistingAssetsDto 
+     * @param {*} [options] Override http request option.
+     * @throws {RequiredError}
+     * @memberof AssetApi
+     */
+    public checkExistingAssets(checkExistingAssetsDto: CheckExistingAssetsDto, options?: AxiosRequestConfig) {
+        return AssetApiFp(this.configuration).checkExistingAssets(checkExistingAssetsDto, options).then((request) => request(this.axios, this.basePath));
+    }
+
     /**
      * 
      * @param {DeleteAssetDto} deleteAssetDto 

web/src/lib/utils/file-uploader.ts

@@ -200,12 +200,12 @@ async function fileUploader(asset: File, uploadType: UploadType) {
 }
 // TODO: This should have a proper type
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-function handleUploadError(asset: File, respBody?: any) {
+function handleUploadError(asset: File, respBody: any, extraMessage?: string) {
-	const extraMsg = respBody ? ' ' + respBody.message : '';
+	const extraMsg = respBody ? ' ' + respBody?.message : '';
 
 	notificationController.show({
 		type: NotificationType.Error,
-		message: `Cannot upload file ${asset.name}!${extraMsg}`,
+		message: `Cannot upload file ${asset.name} ${extraMsg}${extraMessage}`,
 		timeout: 5000
 	});
 }