feat: add cloud id during native sync (#20418)

* use adjustment time in iOS for hash reset

# Conflicts:
#	mobile/lib/infrastructure/repositories/local_album.repository.dart
#	mobile/lib/presentation/pages/drift_asset_troubleshoot.page.dart

* migration

* feat: sync cloudId and eTag on sync

* fixes fixes

* more fixes

* re-sync updated eTags

* add server version check & auto sync cloud ids on compatible servers

* fix test

* remove button from sync status page

* chore: modify for testing

* more changes

* chore: add commas in toString

* use cached provider in splash screen

* read upload service provider to prevent reset

* log errors from fetching cloud id mapping

* WIP: migrate cloud id - debug log

* ignore locked asset update

* bulk update metadata

* change log text

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>
Co-authored-by: Alex <alex.tran1502@gmail.com>

i18n/en.json

@@ -2124,6 +2124,7 @@
   "sync": "Sync",
   "sync_albums": "Sync albums",
   "sync_albums_manual_subtitle": "Sync all uploaded videos and photos to the selected backup albums",
+  "sync_cloud_ids": "Sync Cloud IDs",
   "sync_local": "Sync Local",
   "sync_remote": "Sync Remote",
   "sync_status": "Sync Status",

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/Messages.g.kt

@@ -252,6 +252,40 @@ data class HashResult (
 
   override fun hashCode(): Int = toList().hashCode()
 }
+
+/** Generated class from Pigeon that represents data sent in messages. */
+data class CloudIdResult (
+  val assetId: String,
+  val error: String? = null,
+  val cloudId: String? = null
+)
+ {
+  companion object {
+    fun fromList(pigeonVar_list: List<Any?>): CloudIdResult {
+      val assetId = pigeonVar_list[0] as String
+      val error = pigeonVar_list[1] as String?
+      val cloudId = pigeonVar_list[2] as String?
+      return CloudIdResult(assetId, error, cloudId)
+    }
+  }
+  fun toList(): List<Any?> {
+    return listOf(
+      assetId,
+      error,
+      cloudId,
+    )
+  }
+  override fun equals(other: Any?): Boolean {
+    if (other !is CloudIdResult) {
+      return false
+    }
+    if (this === other) {
+      return true
+    }
+    return MessagesPigeonUtils.deepEquals(toList(), other.toList())  }
+
+  override fun hashCode(): Int = toList().hashCode()
+}
 private open class MessagesPigeonCodec : StandardMessageCodec() {
   override fun readValueOfType(type: Byte, buffer: ByteBuffer): Any? {
     return when (type) {
@@ -275,6 +309,11 @@ private open class MessagesPigeonCodec : StandardMessageCodec() {
           HashResult.fromList(it)
         }
       }
+      133.toByte() -> {
+        return (readValue(buffer) as? List<Any?>)?.let {
+          CloudIdResult.fromList(it)
+        }
+      }
       else -> super.readValueOfType(type, buffer)
     }
   }
@@ -296,6 +335,10 @@ private open class MessagesPigeonCodec : StandardMessageCodec() {
         stream.write(132)
         writeValue(stream, value.toList())
       }
+      is CloudIdResult -> {
+        stream.write(133)
+        writeValue(stream, value.toList())
+      }
       else -> super.writeValue(stream, value)
     }
   }
@@ -315,6 +358,7 @@ interface NativeSyncApi {
   fun hashAssets(assetIds: List<String>, allowNetworkAccess: Boolean, callback: (Result<List<HashResult>>) -> Unit)
   fun cancelHashing()
   fun getTrashedAssets(): Map<String, List<PlatformAsset>>
+  fun getCloudIdForAssetIds(assetIds: List<String>): List<CloudIdResult>
 
   companion object {
     /** The codec used by NativeSyncApi. */
@@ -508,6 +552,23 @@ interface NativeSyncApi {
           channel.setMessageHandler(null)
         }
       }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getCloudIdForAssetIds$separatedMessageChannelSuffix", codec, taskQueue)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val assetIdsArg = args[0] as List<String>
+            val wrapped: List<Any?> = try {
+              listOf(api.getCloudIdForAssetIds(assetIdsArg))
+            } catch (exception: Throwable) {
+              MessagesPigeonUtils.wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
     }
   }
 }

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/MessagesImplBase.kt

@@ -14,6 +14,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.async
 import kotlinx.coroutines.awaitAll
+import kotlinx.coroutines.currentCoroutineContext
 import kotlinx.coroutines.ensureActive
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Semaphore
@@ -21,7 +22,6 @@ import kotlinx.coroutines.sync.withPermit
 import java.io.File
 import java.security.MessageDigest
 import kotlin.coroutines.cancellation.CancellationException
-import kotlin.coroutines.coroutineContext
 
 sealed class AssetResult {
   data class ValidAsset(val asset: PlatformAsset, val albumId: String) : AssetResult()
@@ -298,7 +298,7 @@ open class NativeSyncApiImplBase(context: Context) : ImmichPlugin() {
         var bytesRead: Int
         val buffer = ByteArray(HASH_BUFFER_SIZE)
         while (inputStream.read(buffer).also { bytesRead = it } > 0) {
-          coroutineContext.ensureActive()
+          currentCoroutineContext().ensureActive()
           digest.update(buffer, 0, bytesRead)
         }
       } ?: return HashResult(assetId, "Cannot open input stream for asset", null)
@@ -316,4 +316,10 @@ open class NativeSyncApiImplBase(context: Context) : ImmichPlugin() {
     hashTask?.cancel()
     hashTask = null
   }
+
+  // This method is only implemented on iOS; on Android, we do not have a concept of cloud IDs
+  @Suppress("unused", "UNUSED_PARAMETER")
+  fun getCloudIdForAssetIds(assetIds: List<String>): List<CloudIdResult> {
+    return emptyList()
+  }
 }

mobile/ios/Runner/Sync/Messages.g.swift

@@ -312,6 +312,39 @@ struct HashResult: Hashable {
   }
 }
 
+/// Generated class from Pigeon that represents data sent in messages.
+struct CloudIdResult: Hashable {
+  var assetId: String
+  var error: String? = nil
+  var cloudId: String? = nil
+
+
+  // swift-format-ignore: AlwaysUseLowerCamelCase
+  static func fromList(_ pigeonVar_list: [Any?]) -> CloudIdResult? {
+    let assetId = pigeonVar_list[0] as! String
+    let error: String? = nilOrValue(pigeonVar_list[1])
+    let cloudId: String? = nilOrValue(pigeonVar_list[2])
+
+    return CloudIdResult(
+      assetId: assetId,
+      error: error,
+      cloudId: cloudId
+    )
+  }
+  func toList() -> [Any?] {
+    return [
+      assetId,
+      error,
+      cloudId,
+    ]
+  }
+  static func == (lhs: CloudIdResult, rhs: CloudIdResult) -> Bool {
+    return deepEqualsMessages(lhs.toList(), rhs.toList())  }
+  func hash(into hasher: inout Hasher) {
+    deepHashMessages(value: toList(), hasher: &hasher)
+  }
+}
+
 private class MessagesPigeonCodecReader: FlutterStandardReader {
   override func readValue(ofType type: UInt8) -> Any? {
     switch type {
@@ -323,6 +356,8 @@ private class MessagesPigeonCodecReader: FlutterStandardReader {
       return SyncDelta.fromList(self.readValue() as! [Any?])
     case 132:
       return HashResult.fromList(self.readValue() as! [Any?])
+    case 133:
+      return CloudIdResult.fromList(self.readValue() as! [Any?])
     default:
       return super.readValue(ofType: type)
     }
@@ -343,6 +378,9 @@ private class MessagesPigeonCodecWriter: FlutterStandardWriter {
     } else if let value = value as? HashResult {
       super.writeByte(132)
       super.writeValue(value.toList())
+    } else if let value = value as? CloudIdResult {
+      super.writeByte(133)
+      super.writeValue(value.toList())
     } else {
       super.writeValue(value)
     }
@@ -377,6 +415,7 @@ protocol NativeSyncApi {
   func hashAssets(assetIds: [String], allowNetworkAccess: Bool, completion: @escaping (Result<[HashResult], Error>) -> Void)
   func cancelHashing() throws
   func getTrashedAssets() throws -> [String: [PlatformAsset]]
+  func getCloudIdForAssetIds(assetIds: [String]) throws -> [CloudIdResult]
 }
 
 /// Generated setup class from Pigeon to handle messages through the `binaryMessenger`.
@@ -560,5 +599,22 @@ class NativeSyncApiSetup {
     } else {
       getTrashedAssetsChannel.setMessageHandler(nil)
     }
+    let getCloudIdForAssetIdsChannel = taskQueue == nil
+      ? FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getCloudIdForAssetIds\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
+      : FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getCloudIdForAssetIds\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec, taskQueue: taskQueue)
+    if let api = api {
+      getCloudIdForAssetIdsChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let assetIdsArg = args[0] as! [String]
+        do {
+          let result = try api.getCloudIdForAssetIds(assetIds: assetIdsArg)
+          reply(wrapResult(result))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      getCloudIdForAssetIdsChannel.setMessageHandler(nil)
+    }
   }
 }

mobile/ios/Runner/Sync/MessagesImpl.swift

@@ -390,4 +390,28 @@ class NativeSyncApiImpl: ImmichPlugin, NativeSyncApi, FlutterPlugin {
       return PHAsset.fetchAssets(in: album, options: options)
     }
   }
+  
+  func getCloudIdForAssetIds(assetIds: [String]) throws -> [CloudIdResult] {
+    guard #available(iOS 16, *) else {
+      return assetIds.map { CloudIdResult(assetId: $0) }
+    }
+    
+    var mappings: [CloudIdResult] = []
+    let result = PHPhotoLibrary.shared().cloudIdentifierMappings(forLocalIdentifiers: assetIds)
+    for (key, value) in result {
+      switch value {
+      case .success(let cloudIdentifier):
+        let cloudId = cloudIdentifier.stringValue
+        // Ignores invalid cloud ids of the format "GUID:ID:". Valid Ids are of the form "GUID:ID:HASH"
+        if !cloudId.hasSuffix(":") {
+          mappings.append(CloudIdResult(assetId: key, cloudId: cloudId))
+        } else {
+          mappings.append(CloudIdResult(assetId: key, error: "Incomplete Cloud Id: \(cloudId)"))
+        }
+      case .failure(let error):
+        mappings.append(CloudIdResult(assetId: key, error: "Error getting Cloud Id: \(error.localizedDescription)"))
+      }
+    }
+    return mappings;
+  }
 }

mobile/lib/constants/constants.dart

@@ -4,6 +4,8 @@ const int noDbId = -9223372036854775808; // from Isar
 const double downloadCompleted = -1;
 const double downloadFailed = -2;
 
+const String kMobileMetadataKey = "mobile-app";
+
 // Number of log entries to retain on app start
 const int kLogTruncateLimit = 2000;
 

mobile/lib/domain/models/asset/asset_metadata.model.dart

@@ -0,0 +1,62 @@
+enum RemoteAssetMetadataKey {
+  mobileApp("mobile-app");
+
+  final String key;
+
+  const RemoteAssetMetadataKey(this.key);
+}
+
+abstract class RemoteAssetMetadataValue {
+  const RemoteAssetMetadataValue();
+
+  Map<String, dynamic> toJson();
+}
+
+class RemoteAssetMetadataItem {
+  final RemoteAssetMetadataKey key;
+  final RemoteAssetMetadataValue value;
+
+  const RemoteAssetMetadataItem({required this.key, required this.value});
+
+  Map<String, Object?> toJson() {
+    return {'key': key.key, 'value': value};
+  }
+}
+
+class RemoteAssetMobileAppMetadata extends RemoteAssetMetadataValue {
+  final String? cloudId;
+  final String? createdAt;
+  final String? adjustmentTime;
+  final String? latitude;
+  final String? longitude;
+
+  const RemoteAssetMobileAppMetadata({
+    this.cloudId,
+    this.createdAt,
+    this.adjustmentTime,
+    this.latitude,
+    this.longitude,
+  });
+
+  @override
+  Map<String, dynamic> toJson() {
+    final map = <String, Object?>{};
+    if (cloudId != null) {
+      map["iCloudId"] = cloudId;
+    }
+    if (createdAt != null) {
+      map["createdAt"] = createdAt;
+    }
+    if (adjustmentTime != null) {
+      map["adjustmentTime"] = adjustmentTime;
+    }
+    if (latitude != null) {
+      map["latitude"] = latitude;
+    }
+    if (longitude != null) {
+      map["longitude"] = longitude;
+    }
+
+    return map;
+  }
+}

mobile/lib/domain/models/asset/local_asset.model.dart

@@ -3,6 +3,7 @@ part of 'base_asset.model.dart';
 class LocalAsset extends BaseAsset {
   final String id;
   final String? remoteAssetId;
+  final String? cloudId;
   final int orientation;
 
   final DateTime? adjustmentTime;
@@ -12,6 +13,7 @@ class LocalAsset extends BaseAsset {
   const LocalAsset({
     required this.id,
     String? remoteId,
+    this.cloudId,
     required super.name,
     super.checksum,
     required super.type,
@@ -53,7 +55,9 @@ class LocalAsset extends BaseAsset {
    width: ${width ?? "<NA>"},
    height: ${height ?? "<NA>"},
    durationInSeconds: ${durationInSeconds ?? "<NA>"},
-   remoteId: ${remoteId ?? "<NA>"}
+   remoteId: ${remoteId ?? "<NA>"},
+   cloudId: ${cloudId ?? "<NA>"},
+   checksum: ${checksum ?? "<NA>"},
    isFavorite: $isFavorite,
    orientation: $orientation,
    adjustmentTime: $adjustmentTime,
@@ -69,6 +73,7 @@ class LocalAsset extends BaseAsset {
     if (identical(this, other)) return true;
     return super == other &&
         id == other.id &&
+        cloudId == other.cloudId &&
         orientation == other.orientation &&
         adjustmentTime == other.adjustmentTime &&
         latitude == other.latitude &&
@@ -88,6 +93,7 @@ class LocalAsset extends BaseAsset {
   LocalAsset copyWith({
     String? id,
     String? remoteId,
+    String? cloudId,
     String? name,
     String? checksum,
     AssetType? type,
@@ -105,6 +111,7 @@ class LocalAsset extends BaseAsset {
     return LocalAsset(
       id: id ?? this.id,
       remoteId: remoteId ?? this.remoteId,
+      cloudId: cloudId ?? this.cloudId,
       name: name ?? this.name,
       checksum: checksum ?? this.checksum,
       type: type ?? this.type,

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

@@ -40,6 +40,9 @@ class HashService {
     _log.info("Starting hashing of assets");
     final Stopwatch stopwatch = Stopwatch()..start();
     try {
+      // Migrate hashes from cloud ID to local ID so we don't have to re-hash them
+      await _migrateHashes();
+
       // Sorted by backupSelection followed by isCloud
       final localAlbums = await _localAlbumRepository.getBackupAlbums();
 
@@ -75,6 +78,15 @@ class HashService {
     _log.info("Hashing took - ${stopwatch.elapsedMilliseconds}ms");
   }
 
+  Future<void> _migrateHashes() async {
+    final hashMappings = await _localAssetRepository.getHashMappingFromCloudId();
+    if (hashMappings.isEmpty) {
+      return;
+    }
+
+    await _localAssetRepository.updateHashes(hashMappings);
+  }
+
   /// Processes a list of [LocalAsset]s, storing their hash and updating the assets in the DB
   /// with hash for those that were successfully hashed. Hashes are looked up in a table
   /// [LocalAssetHashEntity] by local id. Only missing entries are newly hashed and added to the DB.

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

@@ -8,6 +8,7 @@ import 'package:immich_mobile/domain/models/store.model.dart';
 import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/extensions/platform_extensions.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_album.repository.dart';
+import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/trashed_local_asset.repository.dart';
 import 'package:immich_mobile/platform/native_sync_api.g.dart';
@@ -18,6 +19,7 @@ import 'package:logging/logging.dart';
 
 class LocalSyncService {
   final DriftLocalAlbumRepository _localAlbumRepository;
+  final DriftLocalAssetRepository _localAssetRepository;
   final NativeSyncApi _nativeSyncApi;
   final DriftTrashedLocalAssetRepository _trashedLocalAssetRepository;
   final LocalFilesManagerRepository _localFilesManager;
@@ -26,11 +28,13 @@ class LocalSyncService {
 
   LocalSyncService({
     required DriftLocalAlbumRepository localAlbumRepository,
+    required DriftLocalAssetRepository localAssetRepository,
     required DriftTrashedLocalAssetRepository trashedLocalAssetRepository,
     required LocalFilesManagerRepository localFilesManager,
     required StorageRepository storageRepository,
     required NativeSyncApi nativeSyncApi,
   }) : _localAlbumRepository = localAlbumRepository,
+       _localAssetRepository = localAssetRepository,
        _trashedLocalAssetRepository = trashedLocalAssetRepository,
        _localFilesManager = localFilesManager,
        _storageRepository = storageRepository,
@@ -47,6 +51,12 @@ class LocalSyncService {
           _log.warning("syncTrashedAssets cannot proceed because MANAGE_MEDIA permission is missing");
         }
       }
+
+      if (CurrentPlatform.isIOS) {
+        final assets = await _localAssetRepository.getEmptyCloudIdAssets();
+        await _mapIosCloudIds(assets);
+      }
+
       if (full || await _nativeSyncApi.shouldFullSync()) {
         _log.fine("Full sync request from ${full ? "user" : "native"}");
         return await fullSync();
@@ -63,8 +73,9 @@ class LocalSyncService {
 
       final deviceAlbums = await _nativeSyncApi.getAlbums();
       await _localAlbumRepository.updateAll(deviceAlbums.toLocalAlbums());
+      final newAssets = delta.updates.toLocalAssets();
       await _localAlbumRepository.processDelta(
-        updates: delta.updates.toLocalAssets(),
+        updates: newAssets,
         deletes: delta.deletes,
         assetAlbums: delta.assetAlbums,
       );
@@ -92,6 +103,8 @@ class LocalSyncService {
           }
           await updateAlbum(dbAlbum, album);
         }
+
+        await _mapIosCloudIds(newAssets);
       }
       await _nativeSyncApi.checkpointSync();
     } catch (e, s) {
@@ -130,9 +143,12 @@ class LocalSyncService {
     try {
       _log.fine("Adding device album ${album.name}");
 
-      final assets = album.assetCount > 0 ? await _nativeSyncApi.getAssetsForAlbum(album.id) : <PlatformAsset>[];
+      final assets = album.assetCount > 0
+          ? await _nativeSyncApi.getAssetsForAlbum(album.id).then((a) => a.toLocalAssets())
+          : <LocalAsset>[];
 
-      await _localAlbumRepository.upsert(album, toUpsert: assets.toLocalAssets());
+      await _localAlbumRepository.upsert(album, toUpsert: assets);
+      await _mapIosCloudIds(assets);
       _log.fine("Successfully added device album ${album.name}");
     } catch (e, s) {
       _log.warning("Error while adding device album", e, s);
@@ -202,13 +218,16 @@ class LocalSyncService {
         return false;
       }
 
-      final newAssets = await _nativeSyncApi.getAssetsForAlbum(deviceAlbum.id, updatedTimeCond: updatedTime);
+      final newAssets = await _nativeSyncApi
+          .getAssetsForAlbum(deviceAlbum.id, updatedTimeCond: updatedTime)
+          .then((a) => a.toLocalAssets());
 
       await _localAlbumRepository.upsert(
         deviceAlbum.copyWith(backupSelection: dbAlbum.backupSelection),
-        toUpsert: newAssets.toLocalAssets(),
+        toUpsert: newAssets,
       );
 
+      await _mapIosCloudIds(newAssets);
       return true;
     } catch (e, s) {
       _log.warning("Error on fast syncing local album: ${dbAlbum.name}", e, s);
@@ -240,6 +259,7 @@ class LocalSyncService {
       if (dbAlbum.assetCount == 0) {
         _log.fine("Device album ${deviceAlbum.name} is empty. Adding assets to DB.");
         await _localAlbumRepository.upsert(updatedDeviceAlbum, toUpsert: assetsInDevice);
+        await _mapIosCloudIds(assetsInDevice);
         return true;
       }
 
@@ -277,6 +297,7 @@ class LocalSyncService {
       }
 
       await _localAlbumRepository.upsert(updatedDeviceAlbum, toUpsert: assetsToUpsert, toDelete: assetsToDelete);
+      await _mapIosCloudIds(assetsToUpsert);
 
       return true;
     } catch (e, s) {
@@ -285,6 +306,29 @@ class LocalSyncService {
     return true;
   }
 
+  Future<void> _mapIosCloudIds(List<LocalAsset> assets) async {
+    if (!CurrentPlatform.isIOS || assets.isEmpty) {
+      return;
+    }
+
+    final assetIds = assets.map((a) => a.id).toList();
+    final cloudMapping = <String, String>{};
+    final cloudIds = await _nativeSyncApi.getCloudIdForAssetIds(assetIds);
+    for (int i = 0; i < cloudIds.length; i++) {
+      final cloudIdResult = cloudIds[i];
+      if (cloudIdResult.cloudId != null) {
+        cloudMapping[cloudIdResult.assetId] = cloudIdResult.cloudId!;
+      } else {
+        final asset = assets.firstWhereOrNull((a) => a.id == cloudIdResult.assetId);
+        _log.fine(
+          "Cannot fetch cloudId for asset with id: ${cloudIdResult.assetId}, name: ${asset?.name}, createdAt: ${asset?.createdAt}. Error: ${cloudIdResult.error ?? "unknown"}",
+        );
+      }
+    }
+
+    await _localAlbumRepository.updateCloudMapping(cloudMapping);
+  }
+
   bool _assetsEqual(LocalAsset a, LocalAsset b) {
     if (CurrentPlatform.isAndroid) {
       return a.updatedAt.isAtSameMomentAs(b.updatedAt) &&

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

@@ -118,6 +118,10 @@ class SyncStreamService {
         return _syncStreamRepository.deleteAssetsV1(data.cast());
       case SyncEntityType.assetExifV1:
         return _syncStreamRepository.updateAssetsExifV1(data.cast());
+      case SyncEntityType.assetMetadataV1:
+        return _syncStreamRepository.updateAssetsMetadataV1(data.cast());
+      case SyncEntityType.assetMetadataDeleteV1:
+        return _syncStreamRepository.deleteAssetsMetadataV1(data.cast());
       case SyncEntityType.partnerAssetV1:
         return _syncStreamRepository.updateAssetsV1(data.cast(), debugLabel: 'partner');
       case SyncEntityType.partnerAssetBackfillV1:

mobile/lib/domain/utils/background_sync.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 
+import 'package:immich_mobile/domain/utils/migrate_cloud_ids.dart' as m;
 import 'package:immich_mobile/domain/utils/sync_linked_album.dart';
 import 'package:immich_mobile/providers/infrastructure/sync.provider.dart';
 import 'package:immich_mobile/utils/isolate.dart';
@@ -22,8 +23,13 @@ class BackgroundSyncManager {
   final SyncCallback? onHashingComplete;
   final SyncErrorCallback? onHashingError;
 
+  final SyncCallback? onCloudIdSyncStart;
+  final SyncCallback? onCloudIdSyncComplete;
+  final SyncErrorCallback? onCloudIdSyncError;
+
   Cancelable<bool?>? _syncTask;
   Cancelable<void>? _syncWebsocketTask;
+  Cancelable<void>? _cloudIdSyncTask;
   Cancelable<void>? _deviceAlbumSyncTask;
   Cancelable<void>? _linkedAlbumSyncTask;
   Cancelable<void>? _hashTask;
@@ -38,6 +44,9 @@ class BackgroundSyncManager {
     this.onHashingStart,
     this.onHashingComplete,
     this.onHashingError,
+    this.onCloudIdSyncStart,
+    this.onCloudIdSyncComplete,
+    this.onCloudIdSyncError,
   });
 
   Future<void> cancel() async {
@@ -55,6 +64,12 @@ class BackgroundSyncManager {
     _syncWebsocketTask?.cancel();
     _syncWebsocketTask = null;
 
+    if (_cloudIdSyncTask != null) {
+      futures.add(_cloudIdSyncTask!.future);
+    }
+    _cloudIdSyncTask?.cancel();
+    _cloudIdSyncTask = null;
+
     if (_linkedAlbumSyncTask != null) {
       futures.add(_linkedAlbumSyncTask!.future);
     }
@@ -121,7 +136,6 @@ class BackgroundSyncManager {
         });
   }
 
-  // No need to cancel the task, as it can also be run when the user logs out
   Future<void> hashAssets() {
     if (_hashTask != null) {
       return _hashTask!.future;
@@ -192,6 +206,25 @@ class BackgroundSyncManager {
       _linkedAlbumSyncTask = null;
     });
   }
+
+  Future<void> syncCloudIds() {
+    if (_cloudIdSyncTask != null) {
+      return _cloudIdSyncTask!.future;
+    }
+
+    onCloudIdSyncStart?.call();
+
+    _cloudIdSyncTask = runInIsolateGentle(computation: m.syncCloudIds);
+    return _cloudIdSyncTask!
+        .whenComplete(() {
+          onCloudIdSyncComplete?.call();
+          _cloudIdSyncTask = null;
+        })
+        .catchError((error) {
+          onCloudIdSyncError?.call(error.toString());
+          _cloudIdSyncTask = null;
+        });
+  }
 }
 
 Cancelable<void> _handleWsAssetUploadReadyV1Batch(List<dynamic> batchData) => runInIsolateGentle(

mobile/lib/domain/utils/migrate_cloud_ids.dart

@@ -0,0 +1,166 @@
+import 'package:drift/drift.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/constants/constants.dart';
+import 'package:immich_mobile/domain/models/asset/asset_metadata.model.dart';
+import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
+import 'package:immich_mobile/extensions/platform_extensions.dart';
+import 'package:immich_mobile/infrastructure/entities/local_asset.entity.dart';
+import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
+import 'package:immich_mobile/infrastructure/repositories/local_album.repository.dart';
+import 'package:immich_mobile/platform/native_sync_api.g.dart';
+import 'package:immich_mobile/providers/api.provider.dart';
+import 'package:immich_mobile/providers/infrastructure/db.provider.dart';
+import 'package:immich_mobile/providers/infrastructure/sync.provider.dart';
+import 'package:immich_mobile/providers/server_info.provider.dart';
+import 'package:immich_mobile/providers/user.provider.dart';
+import 'package:logging/logging.dart';
+// ignore: import_rule_openapi
+import 'package:openapi/api.dart' hide AssetVisibility;
+
+Future<void> syncCloudIds(ProviderContainer ref) async {
+  if (!CurrentPlatform.isIOS) {
+    return;
+  }
+
+  final db = ref.read(driftProvider);
+  // Populate cloud IDs for local assets that don't have one yet
+  await _populateCloudIds(db);
+
+  final serverInfo = await ref.read(serverInfoProvider.notifier).getServerInfo();
+  final canUpdateMetadata = serverInfo.serverVersion.isAtLeast(major: 2, minor: 4);
+  if (!canUpdateMetadata) {
+    Logger(
+      'migrateCloudIds',
+    ).fine('Server version does not support asset metadata updates. Skipping cloudId migration.');
+    return;
+  }
+  final canBulkUpdateMetadata = serverInfo.serverVersion.isAtLeast(major: 2, minor: 5);
+
+  // Wait for remote sync to complete, so we have up-to-date asset metadata entries
+  try {
+    await ref.read(syncStreamServiceProvider).sync();
+  } catch (e, s) {
+    Logger('migrateCloudIds').fine('Failed to complete remote sync before cloudId migration.', e, s);
+    return;
+  }
+
+  // Fetch the mapping for backed up assets that have a cloud ID locally but do not have a cloud ID on the server
+  final currentUser = ref.read(currentUserProvider);
+  if (currentUser == null) {
+    Logger('migrateCloudIds').warning('Current user is null. Aborting cloudId migration.');
+    return;
+  }
+
+  final mappingsToUpdate = await _fetchCloudIdMappings(db, currentUser.id);
+  final assetApi = ref.read(apiServiceProvider).assetsApi;
+
+  if (canBulkUpdateMetadata) {
+    await _bulkUpdateCloudIds(assetApi, mappingsToUpdate);
+    return;
+  }
+  await _sequentialUpdateCloudIds(assetApi, mappingsToUpdate);
+}
+
+Future<void> _sequentialUpdateCloudIds(AssetsApi assetsApi, List<_CloudIdMapping> mappings) async {
+  for (final mapping in mappings) {
+    final item = AssetMetadataUpsertItemDto(
+      key: kMobileMetadataKey,
+      value: RemoteAssetMobileAppMetadata(
+        cloudId: mapping.localAsset.cloudId,
+        createdAt: mapping.localAsset.createdAt.toIso8601String(),
+        adjustmentTime: mapping.localAsset.adjustmentTime?.toIso8601String(),
+        latitude: mapping.localAsset.latitude?.toString(),
+        longitude: mapping.localAsset.longitude?.toString(),
+      ),
+    );
+    try {
+      await assetsApi.updateAssetMetadata(mapping.remoteAssetId, AssetMetadataUpsertDto(items: [item]));
+    } catch (error, stack) {
+      Logger('migrateCloudIds').warning('Failed to update metadata for asset ${mapping.remoteAssetId}', error, stack);
+    }
+  }
+}
+
+Future<void> _bulkUpdateCloudIds(AssetsApi assetsApi, List<_CloudIdMapping> mappings) async {
+  const batchSize = 10000;
+  for (int i = 0; i < mappings.length; i += batchSize) {
+    final endIndex = (i + batchSize > mappings.length) ? mappings.length : i + batchSize;
+    final batch = mappings.sublist(i, endIndex);
+    final items = <AssetMetadataBulkUpsertItemDto>[];
+    for (final mapping in batch) {
+      items.add(
+        AssetMetadataBulkUpsertItemDto(
+          assetId: mapping.remoteAssetId,
+          key: kMobileMetadataKey,
+          value: RemoteAssetMobileAppMetadata(
+            cloudId: mapping.localAsset.cloudId,
+            createdAt: mapping.localAsset.createdAt.toIso8601String(),
+            adjustmentTime: mapping.localAsset.adjustmentTime?.toIso8601String(),
+            latitude: mapping.localAsset.latitude?.toString(),
+            longitude: mapping.localAsset.longitude?.toString(),
+          ),
+        ),
+      );
+    }
+    try {
+      await assetsApi.updateBulkAssetMetadata(AssetMetadataBulkUpsertDto(items: items));
+    } catch (error, stack) {
+      Logger('migrateCloudIds').warning('Failed to bulk update metadata', error, stack);
+    }
+  }
+}
+
+Future<void> _populateCloudIds(Drift drift) async {
+  final query = drift.localAssetEntity.selectOnly()
+    ..addColumns([drift.localAssetEntity.id])
+    ..where(drift.localAssetEntity.iCloudId.isNull());
+  final ids = await query.map((row) => row.read(drift.localAssetEntity.id)!).get();
+  final cloudMapping = <String, String>{};
+  final cloudIds = await NativeSyncApi().getCloudIdForAssetIds(ids);
+  for (int i = 0; i < cloudIds.length; i++) {
+    final cloudIdResult = cloudIds[i];
+    if (cloudIdResult.cloudId != null) {
+      cloudMapping[cloudIdResult.assetId] = cloudIdResult.cloudId!;
+    } else {
+      Logger('migrateCloudIds').fine(
+        "Cannot fetch cloudId for asset with id: ${cloudIdResult.assetId}. Error: ${cloudIdResult.error ?? "unknown"}",
+      );
+    }
+  }
+  await DriftLocalAlbumRepository(drift).updateCloudMapping(cloudMapping);
+}
+
+typedef _CloudIdMapping = ({String remoteAssetId, LocalAsset localAsset});
+
+Future<List<_CloudIdMapping>> _fetchCloudIdMappings(Drift drift, String userId) async {
+  final query =
+      drift.remoteAssetEntity.select().join([
+        leftOuterJoin(
+          drift.localAssetEntity,
+          drift.localAssetEntity.checksum.equalsExp(drift.remoteAssetEntity.checksum),
+        ),
+        leftOuterJoin(
+          drift.remoteAssetCloudIdEntity,
+          drift.remoteAssetEntity.id.equalsExp(drift.remoteAssetCloudIdEntity.assetId),
+          useColumns: false,
+        ),
+      ])..where(
+        // Only select assets that have a local cloud ID but either no remote cloud ID or a mismatched eTag
+        drift.localAssetEntity.id.isNotNull() &
+            drift.localAssetEntity.iCloudId.isNotNull() &
+            drift.remoteAssetEntity.ownerId.equals(userId) &
+            // Skip locked assets as we cannot update them without unlocking first
+            drift.remoteAssetEntity.visibility.isNotValue(AssetVisibility.locked.index) &
+            (drift.remoteAssetCloudIdEntity.cloudId.isNull() |
+                ((drift.remoteAssetCloudIdEntity.adjustmentTime.isNotExp(drift.localAssetEntity.adjustmentTime)) &
+                    (drift.remoteAssetCloudIdEntity.latitude.isNotExp(drift.localAssetEntity.latitude)) &
+                    (drift.remoteAssetCloudIdEntity.longitude.isNotExp(drift.localAssetEntity.longitude)) &
+                    (drift.remoteAssetCloudIdEntity.createdAt.isNotExp(drift.localAssetEntity.createdAt)))),
+      );
+  return query.map((row) {
+    return (
+      remoteAssetId: row.read(drift.remoteAssetEntity.id)!,
+      localAsset: row.readTable(drift.localAssetEntity).toDto(),
+    );
+  }).get();
+}

mobile/lib/infrastructure/entities/local_asset.entity.dart

@@ -5,6 +5,7 @@ import 'package:immich_mobile/infrastructure/utils/asset.mixin.dart';
 import 'package:immich_mobile/infrastructure/utils/drift_default.mixin.dart';
 
 @TableIndex.sql('CREATE INDEX IF NOT EXISTS idx_local_asset_checksum ON local_asset_entity (checksum)')
+@TableIndex.sql('CREATE INDEX IF NOT EXISTS idx_local_asset_cloud_id ON local_asset_entity (i_cloud_id)')
 class LocalAssetEntity extends Table with DriftDefaultsMixin, AssetEntityMixin {
   const LocalAssetEntity();
 
@@ -16,6 +17,8 @@ class LocalAssetEntity extends Table with DriftDefaultsMixin, AssetEntityMixin {
 
   IntColumn get orientation => integer().withDefault(const Constant(0))();
 
+  TextColumn get iCloudId => text().nullable()();
+
   DateTimeColumn get adjustmentTime => dateTime().nullable()();
 
   RealColumn get latitude => real().nullable()();
@@ -43,5 +46,6 @@ extension LocalAssetEntityDataDomainExtension on LocalAssetEntityData {
     adjustmentTime: adjustmentTime,
     latitude: latitude,
     longitude: longitude,
+    cloudId: iCloudId,
   );
 }

mobile/lib/infrastructure/entities/merged_asset.drift

@@ -21,7 +21,11 @@ SELECT
 	rae.owner_id,
 	rae.live_photo_video_id,
 	0 as orientation,
-	rae.stack_id
+	rae.stack_id,
+	NULL as i_cloud_id,
+	NULL as latitude,
+	NULL as longitude,
+	NULL as adjustmentTime
 FROM
 	remote_asset_entity rae
 LEFT JOIN
@@ -53,7 +57,11 @@ SELECT
 	NULL as owner_id,
 	NULL as live_photo_video_id,
 	lae.orientation,
-	NULL as stack_id
+	NULL as stack_id,
+	lae.i_cloud_id,
+	lae.latitude,
+	lae.longitude,
+	lae.adjustment_time
 FROM
 	local_asset_entity lae
 WHERE NOT EXISTS (

mobile/lib/infrastructure/entities/remote_asset_cloud_id.entity.dart

@@ -0,0 +1,20 @@
+import 'package:drift/drift.dart';
+import 'package:immich_mobile/infrastructure/entities/remote_asset.entity.dart';
+import 'package:immich_mobile/infrastructure/utils/drift_default.mixin.dart';
+
+class RemoteAssetCloudIdEntity extends Table with DriftDefaultsMixin {
+  TextColumn get assetId => text().references(RemoteAssetEntity, #id, onDelete: KeyAction.cascade)();
+
+  TextColumn get cloudId => text().unique().nullable()();
+
+  DateTimeColumn get createdAt => dateTime().nullable()();
+
+  DateTimeColumn get adjustmentTime => dateTime().nullable()();
+
+  RealColumn get latitude => real().nullable()();
+
+  RealColumn get longitude => real().nullable()();
+
+  @override
+  Set<Column> get primaryKey => {assetId};
+}

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

@@ -18,6 +18,7 @@ import 'package:immich_mobile/infrastructure/entities/remote_album.entity.dart';
 import 'package:immich_mobile/infrastructure/entities/remote_album_asset.entity.dart';
 import 'package:immich_mobile/infrastructure/entities/remote_album_user.entity.dart';
 import 'package:immich_mobile/infrastructure/entities/remote_asset.entity.dart';
+import 'package:immich_mobile/infrastructure/entities/remote_asset_cloud_id.entity.dart';
 import 'package:immich_mobile/infrastructure/entities/stack.entity.dart';
 import 'package:immich_mobile/infrastructure/entities/store.entity.dart';
 import 'package:immich_mobile/infrastructure/entities/trashed_local_asset.entity.dart';
@@ -57,6 +58,7 @@ class IsarDatabaseRepository implements IDatabaseRepository {
     RemoteAlbumEntity,
     RemoteAlbumAssetEntity,
     RemoteAlbumUserEntity,
+    RemoteAssetCloudIdEntity,
     MemoryEntity,
     MemoryAssetEntity,
     StackEntity,
@@ -95,7 +97,7 @@ class Drift extends $Drift implements IDatabaseRepository {
   }
 
   @override
-  int get schemaVersion => 15;
+  int get schemaVersion => 16;
 
   @override
   MigrationStrategy get migration => MigrationStrategy(
@@ -193,6 +195,12 @@ class Drift extends $Drift implements IDatabaseRepository {
           from14To15: (m, v15) async {
             await m.addColumn(v15.trashedLocalAssetEntity, v15.trashedLocalAssetEntity.source);
           },
+          from15To16: (m, v16) async {
+            // Add i_cloud_id to local and remote asset tables
+            await m.addColumn(v16.localAssetEntity, v16.localAssetEntity.iCloudId);
+            await m.createIndex(v16.idxLocalAssetCloudId);
+            await m.createTable(v16.remoteAssetCloudIdEntity);
+          },
         ),
       );
 

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

@@ -246,6 +246,25 @@ class DriftLocalAlbumRepository extends DriftDatabaseRepository {
     return query.map((row) => row.readTable(_db.localAssetEntity).toDto()).get();
   }
 
+  Future<void> updateCloudMapping(Map<String, String> cloudMapping) {
+    if (cloudMapping.isEmpty) {
+      return Future.value();
+    }
+
+    return _db.batch((batch) {
+      for (final entry in cloudMapping.entries) {
+        final assetId = entry.key;
+        final cloudId = entry.value;
+
+        batch.update(
+          _db.localAssetEntity,
+          LocalAssetEntityCompanion(iCloudId: Value(cloudId)),
+          where: (f) => f.id.equals(assetId),
+        );
+      }
+    });
+  }
+
   Future<void> Function(Iterable<LocalAsset>) get _upsertAssets =>
       CurrentPlatform.isIOS ? _upsertAssetsDarwin : _upsertAssetsAndroid;
 

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

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:collection/collection.dart';
 import 'package:drift/drift.dart';
 import 'package:immich_mobile/constants/constants.dart';
@@ -172,4 +174,40 @@ class DriftLocalAssetRepository extends DriftDatabaseRepository {
     final rows = await query.get();
     return rows.map((row) => row.readTable(_db.localAssetEntity).toDto()).toList();
   }
+
+  Future<List<LocalAsset>> getEmptyCloudIdAssets() {
+    final query = _db.localAssetEntity.select()..where((row) => row.iCloudId.isNull());
+    return query.map((row) => row.toDto()).get();
+  }
+
+  Future<Map<String, String>> getHashMappingFromCloudId() async {
+    final query =
+        _db.localAssetEntity.selectOnly().join([
+            leftOuterJoin(
+              _db.remoteAssetCloudIdEntity,
+              _db.localAssetEntity.iCloudId.equalsExp(_db.remoteAssetCloudIdEntity.cloudId),
+              useColumns: false,
+            ),
+            leftOuterJoin(
+              _db.remoteAssetEntity,
+              _db.remoteAssetCloudIdEntity.assetId.equalsExp(_db.remoteAssetEntity.id),
+              useColumns: false,
+            ),
+          ])
+          ..addColumns([_db.localAssetEntity.id, _db.remoteAssetEntity.checksum])
+          ..where(
+            _db.remoteAssetCloudIdEntity.cloudId.isNotNull() &
+                _db.localAssetEntity.checksum.isNull() &
+                ((_db.remoteAssetCloudIdEntity.adjustmentTime.isExp(_db.localAssetEntity.adjustmentTime)) &
+                    (_db.remoteAssetCloudIdEntity.latitude.isExp(_db.localAssetEntity.latitude)) &
+                    (_db.remoteAssetCloudIdEntity.longitude.isExp(_db.localAssetEntity.longitude)) &
+                    (_db.remoteAssetCloudIdEntity.createdAt.isExp(_db.localAssetEntity.createdAt))),
+          );
+    final mapping = await query
+        .map(
+          (row) => (assetId: row.read(_db.localAssetEntity.id)!, checksum: row.read(_db.remoteAssetEntity.checksum)!),
+        )
+        .get();
+    return {for (final entry in mapping) entry.assetId: entry.checksum};
+  }
 }

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

@@ -45,6 +45,7 @@ class SyncApiRepository {
           SyncRequestType.usersV1,
           SyncRequestType.assetsV1,
           SyncRequestType.assetExifsV1,
+          SyncRequestType.assetMetadataV1,
           SyncRequestType.partnersV1,
           SyncRequestType.partnerAssetsV1,
           SyncRequestType.partnerAssetExifsV1,
@@ -148,6 +149,8 @@ const _kResponseMap = <SyncEntityType, Function(Object)>{
   SyncEntityType.assetV1: SyncAssetV1.fromJson,
   SyncEntityType.assetDeleteV1: SyncAssetDeleteV1.fromJson,
   SyncEntityType.assetExifV1: SyncAssetExifV1.fromJson,
+  SyncEntityType.assetMetadataV1: SyncAssetMetadataV1.fromJson,
+  SyncEntityType.assetMetadataDeleteV1: SyncAssetMetadataDeleteV1.fromJson,
   SyncEntityType.partnerAssetV1: SyncAssetV1.fromJson,
   SyncEntityType.partnerAssetBackfillV1: SyncAssetV1.fromJson,
   SyncEntityType.partnerAssetDeleteV1: SyncAssetDeleteV1.fromJson,

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

@@ -2,6 +2,7 @@ import 'dart:convert';
 
 import 'package:collection/collection.dart';
 import 'package:drift/drift.dart';
+import 'package:immich_mobile/constants/constants.dart';
 import 'package:immich_mobile/domain/models/album/album.model.dart';
 import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/domain/models/memory.model.dart';
@@ -18,6 +19,7 @@ import 'package:immich_mobile/infrastructure/entities/remote_album.entity.drift.
 import 'package:immich_mobile/infrastructure/entities/remote_album_asset.entity.drift.dart';
 import 'package:immich_mobile/infrastructure/entities/remote_album_user.entity.drift.dart';
 import 'package:immich_mobile/infrastructure/entities/remote_asset.entity.drift.dart';
+import 'package:immich_mobile/infrastructure/entities/remote_asset_cloud_id.entity.drift.dart';
 import 'package:immich_mobile/infrastructure/entities/stack.entity.drift.dart';
 import 'package:immich_mobile/infrastructure/entities/user.entity.drift.dart';
 import 'package:immich_mobile/infrastructure/entities/user_metadata.entity.drift.dart';
@@ -55,6 +57,7 @@ class SyncStreamRepository extends DriftDatabaseRepository {
           await _db.authUserEntity.deleteAll();
           await _db.userEntity.deleteAll();
           await _db.userMetadataEntity.deleteAll();
+          await _db.remoteAssetCloudIdEntity.deleteAll();
         });
         await _db.customStatement('PRAGMA foreign_keys = ON');
       });
@@ -272,6 +275,50 @@ class SyncStreamRepository extends DriftDatabaseRepository {
     }
   }
 
+  Future<void> deleteAssetsMetadataV1(Iterable<SyncAssetMetadataDeleteV1> data) async {
+    try {
+      await _db.batch((batch) {
+        for (final metadata in data) {
+          if (metadata.key == kMobileMetadataKey) {
+            batch.deleteWhere(_db.remoteAssetCloudIdEntity, (row) => row.assetId.equals(metadata.assetId));
+          }
+        }
+      });
+    } catch (error, stack) {
+      _logger.severe('Error: deleteAssetsMetadataV1', error, stack);
+      rethrow;
+    }
+  }
+
+  Future<void> updateAssetsMetadataV1(Iterable<SyncAssetMetadataV1> data) async {
+    try {
+      await _db.batch((batch) {
+        for (final metadata in data) {
+          if (metadata.key == kMobileMetadataKey) {
+            final map = metadata.value as Map<String, Object?>;
+            final companion = RemoteAssetCloudIdEntityCompanion(
+              cloudId: Value(map['iCloudId']?.toString()),
+              createdAt: Value(map['createdAt'] != null ? DateTime.parse(map['createdAt'] as String) : null),
+              adjustmentTime: Value(
+                map['adjustmentTime'] != null ? DateTime.parse(map['adjustmentTime'] as String) : null,
+              ),
+              latitude: Value(map['latitude'] != null ? (double.tryParse(map['latitude'] as String)) : null),
+              longitude: Value(map['longitude'] != null ? (double.tryParse(map['longitude'] as String)) : null),
+            );
+            batch.insert(
+              _db.remoteAssetCloudIdEntity,
+              companion.copyWith(assetId: Value(metadata.assetId)),
+              onConflict: DoUpdate((_) => companion),
+            );
+          }
+        }
+      });
+    } catch (error, stack) {
+      _logger.severe('Error: updateAssetsMetadataV1', error, stack);
+      rethrow;
+    }
+  }
+
   Future<void> deleteAlbumsV1(Iterable<SyncAlbumDeleteV1> data) async {
     try {
       await _db.batch((batch) {

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

@@ -84,6 +84,10 @@ class DriftTimelineRepository extends DriftDatabaseRepository {
                   isFavorite: row.isFavorite,
                   durationInSeconds: row.durationInSeconds,
                   orientation: row.orientation,
+                  cloudId: row.iCloudId,
+                  latitude: row.latitude,
+                  longitude: row.longitude,
+                  adjustmentTime: row.adjustmentTime,
                 ),
         )
         .get();

mobile/lib/models/server_info/server_version.model.dart

@@ -10,4 +10,8 @@ class ServerVersion extends SemVer {
   }
 
   ServerVersion.fromDto(ServerVersionResponseDto dto) : super(major: dto.major, minor: dto.minor, patch: dto.patch_);
+
+  bool isAtLeast({int major = 0, int minor = 0, int patch = 0}) {
+    return this >= SemVer(major: major, minor: minor, patch: patch);
+  }
 }

mobile/lib/pages/common/splash_screen.page.dart

@@ -10,7 +10,6 @@ import 'package:immich_mobile/providers/background_sync.provider.dart';
 import 'package:immich_mobile/providers/backup/backup.provider.dart';
 import 'package:immich_mobile/providers/backup/drift_backup.provider.dart';
 import 'package:immich_mobile/providers/gallery_permission.provider.dart';
-import 'package:immich_mobile/providers/server_info.provider.dart';
 import 'package:immich_mobile/providers/websocket.provider.dart';
 import 'package:immich_mobile/routing/router.dart';
 import 'package:logging/logging.dart';
@@ -50,7 +49,6 @@ class SplashScreenPageState extends ConsumerState<SplashScreenPage> {
     final accessToken = Store.tryGet(StoreKey.accessToken);
 
     if (accessToken != null && serverUrl != null && endpoint != null) {
-      final infoProvider = ref.read(serverInfoProvider.notifier);
       final wsProvider = ref.read(websocketProvider.notifier);
       final backgroundManager = ref.read(backgroundSyncProvider);
       final backupProvider = ref.read(driftBackupProvider.notifier);
@@ -60,7 +58,6 @@ class SplashScreenPageState extends ConsumerState<SplashScreenPage> {
           (_) async {
             try {
               wsProvider.connect();
-              unawaited(infoProvider.getServerInfo());
 
               if (Store.isBetaTimelineEnabled) {
                 bool syncSuccess = false;
@@ -75,6 +72,7 @@ class SplashScreenPageState extends ConsumerState<SplashScreenPage> {
                       _resumeBackup(backupProvider);
                     }),
                     _resumeBackup(backupProvider),
+                    backgroundManager.syncCloudIds(),
                   ]);
                 } else {
                   await backgroundManager.hashAssets();

mobile/lib/presentation/pages/drift_asset_troubleshoot.page.dart

@@ -131,6 +131,7 @@ class _AssetPropertiesSectionState extends ConsumerState<_AssetPropertiesSection
     final albums = await ref.read(assetServiceProvider).getSourceAlbums(asset.id);
     properties.add(_PropertyItem(label: 'Album', value: albums.map((a) => a.name).join(', ')));
     if (CurrentPlatform.isIOS) {
+      properties.add(_PropertyItem(label: 'Cloud ID', value: asset.cloudId));
       properties.add(_PropertyItem(label: 'Adjustment Time', value: asset.adjustmentTime?.toString()));
     }
     properties.add(

mobile/lib/providers/app_life_cycle.provider.dart

@@ -160,6 +160,7 @@ class AppLifeCycleNotifier extends StateNotifier<AppLifeCycleEnum> {
             _resumeBackup();
           }),
           _resumeBackup(),
+          backgroundManager.syncCloudIds(),
         ]);
       } else {
         await _safeRun(backgroundManager.hashAssets(), "hashAssets");

mobile/lib/providers/auth.provider.dart

@@ -14,19 +14,19 @@ import 'package:immich_mobile/services/auth.service.dart';
 import 'package:immich_mobile/services/secure_storage.service.dart';
 import 'package:immich_mobile/services/upload.service.dart';
 import 'package:immich_mobile/services/widget.service.dart';
+import 'package:immich_mobile/utils/debug_print.dart';
 import 'package:immich_mobile/utils/hash.dart';
 import 'package:logging/logging.dart';
 import 'package:openapi/api.dart';
-import 'package:immich_mobile/utils/debug_print.dart';
 
 final authProvider = StateNotifierProvider<AuthNotifier, AuthState>((ref) {
   return AuthNotifier(
     ref.watch(authServiceProvider),
     ref.watch(apiServiceProvider),
     ref.watch(userServiceProvider),
-    ref.watch(uploadServiceProvider),
     ref.watch(secureStorageServiceProvider),
     ref.watch(widgetServiceProvider),
+    ref,
   );
 });
 
@@ -34,9 +34,9 @@ class AuthNotifier extends StateNotifier<AuthState> {
   final AuthService _authService;
   final ApiService _apiService;
   final UserService _userService;
-  final UploadService _uploadService;
   final SecureStorageService _secureStorageService;
   final WidgetService _widgetService;
+  final Ref _ref;
   final _log = Logger("AuthenticationNotifier");
 
   static const Duration _timeoutDuration = Duration(seconds: 7);
@@ -45,9 +45,9 @@ class AuthNotifier extends StateNotifier<AuthState> {
     this._authService,
     this._apiService,
     this._userService,
-    this._uploadService,
     this._secureStorageService,
     this._widgetService,
+    this._ref,
   ) : super(
         const AuthState(
           deviceId: "",
@@ -87,7 +87,7 @@ class AuthNotifier extends StateNotifier<AuthState> {
       await _widgetService.clearCredentials();
 
       await _authService.logout();
-      await _uploadService.cancelBackup();
+      await _ref.read(uploadServiceProvider).cancelBackup();
     } finally {
       await _cleanUp();
     }

mobile/lib/providers/background_sync.provider.dart

@@ -28,6 +28,9 @@ final backgroundSyncProvider = Provider<BackgroundSyncManager>((ref) {
     onHashingStart: syncStatusNotifier.startHashJob,
     onHashingComplete: syncStatusNotifier.completeHashJob,
     onHashingError: syncStatusNotifier.errorHashJob,
+    onCloudIdSyncStart: syncStatusNotifier.startCloudIdSync,
+    onCloudIdSyncComplete: syncStatusNotifier.completeCloudIdSync,
+    onCloudIdSyncError: syncStatusNotifier.errorCloudIdSync,
   );
   ref.onDispose(manager.cancel);
   return manager;

mobile/lib/providers/infrastructure/sync.provider.dart

@@ -32,6 +32,7 @@ final syncStreamRepositoryProvider = Provider((ref) => SyncStreamRepository(ref.
 final localSyncServiceProvider = Provider(
   (ref) => LocalSyncService(
     localAlbumRepository: ref.watch(localAlbumRepository),
+    localAssetRepository: ref.watch(localAssetRepository),
     trashedLocalAssetRepository: ref.watch(trashedLocalAssetRepository),
     localFilesManager: ref.watch(localFilesManagerRepositoryProvider),
     storageRepository: ref.watch(storageRepositoryProvider),

mobile/lib/providers/server_info.provider.dart

@@ -32,10 +32,11 @@ class ServerInfoNotifier extends StateNotifier<ServerInfo> {
   final ServerInfoService _serverInfoService;
   final _log = Logger("ServerInfoNotifier");
 
-  Future<void> getServerInfo() async {
+  Future<ServerInfo> getServerInfo() async {
     await getServerVersion();
     await getServerFeatures();
     await getServerConfig();
+    return state;
   }
 
   Future<void> getServerVersion() async {

mobile/lib/providers/sync_status.provider.dart

@@ -21,6 +21,7 @@ class SyncStatusState {
   final SyncStatus remoteSyncStatus;
   final SyncStatus localSyncStatus;
   final SyncStatus hashJobStatus;
+  final SyncStatus cloudIdSyncStatus;
 
   final String? errorMessage;
 
@@ -28,6 +29,7 @@ class SyncStatusState {
     this.remoteSyncStatus = SyncStatus.idle,
     this.localSyncStatus = SyncStatus.idle,
     this.hashJobStatus = SyncStatus.idle,
+    this.cloudIdSyncStatus = SyncStatus.idle,
     this.errorMessage,
   });
 
@@ -35,12 +37,14 @@ class SyncStatusState {
     SyncStatus? remoteSyncStatus,
     SyncStatus? localSyncStatus,
     SyncStatus? hashJobStatus,
+    SyncStatus? cloudIdSyncStatus,
     String? errorMessage,
   }) {
     return SyncStatusState(
       remoteSyncStatus: remoteSyncStatus ?? this.remoteSyncStatus,
       localSyncStatus: localSyncStatus ?? this.localSyncStatus,
       hashJobStatus: hashJobStatus ?? this.hashJobStatus,
+      cloudIdSyncStatus: cloudIdSyncStatus ?? this.cloudIdSyncStatus,
       errorMessage: errorMessage ?? this.errorMessage,
     );
   }
@@ -48,6 +52,7 @@ class SyncStatusState {
   bool get isRemoteSyncing => remoteSyncStatus == SyncStatus.syncing;
   bool get isLocalSyncing => localSyncStatus == SyncStatus.syncing;
   bool get isHashing => hashJobStatus == SyncStatus.syncing;
+  bool get isCloudIdSyncing => cloudIdSyncStatus == SyncStatus.syncing;
 
   @override
   bool operator ==(Object other) {
@@ -56,11 +61,12 @@ class SyncStatusState {
         other.remoteSyncStatus == remoteSyncStatus &&
         other.localSyncStatus == localSyncStatus &&
         other.hashJobStatus == hashJobStatus &&
+        other.cloudIdSyncStatus == cloudIdSyncStatus &&
         other.errorMessage == errorMessage;
   }
 
   @override
-  int get hashCode => Object.hash(remoteSyncStatus, localSyncStatus, hashJobStatus, errorMessage);
+  int get hashCode => Object.hash(remoteSyncStatus, localSyncStatus, hashJobStatus, cloudIdSyncStatus, errorMessage);
 }
 
 class SyncStatusNotifier extends Notifier<SyncStatusState> {
@@ -71,6 +77,7 @@ class SyncStatusNotifier extends Notifier<SyncStatusState> {
       remoteSyncStatus: SyncStatus.idle,
       localSyncStatus: SyncStatus.idle,
       hashJobStatus: SyncStatus.idle,
+      cloudIdSyncStatus: SyncStatus.idle,
     );
   }
 
@@ -109,6 +116,18 @@ class SyncStatusNotifier extends Notifier<SyncStatusState> {
   void startHashJob() => setHashJobStatus(SyncStatus.syncing);
   void completeHashJob() => setHashJobStatus(SyncStatus.success);
   void errorHashJob(String error) => setHashJobStatus(SyncStatus.error, error);
+
+  ///
+  /// Cloud ID Sync Job
+  ///
+
+  void setCloudIdSyncStatus(SyncStatus status, [String? errorMessage]) {
+    state = state.copyWith(cloudIdSyncStatus: status, errorMessage: status == SyncStatus.error ? errorMessage : null);
+  }
+
+  void startCloudIdSync() => setCloudIdSyncStatus(SyncStatus.syncing);
+  void completeCloudIdSync() => setCloudIdSyncStatus(SyncStatus.success);
+  void errorCloudIdSync(String error) => setCloudIdSyncStatus(SyncStatus.error, error);
 }
 
 final syncStatusProvider = NotifierProvider<SyncStatusNotifier, SyncStatusState>(SyncStatusNotifier.new);

mobile/lib/services/upload.service.dart

@@ -7,6 +7,7 @@ import 'package:cancellation_token_http/http.dart';
 import 'package:flutter/foundation.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/constants/constants.dart';
+import 'package:immich_mobile/domain/models/asset/asset_metadata.model.dart';
 import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/domain/models/store.model.dart';
 import 'package:immich_mobile/entities/store.entity.dart';
@@ -14,10 +15,12 @@ import 'package:immich_mobile/extensions/platform_extensions.dart';
 import 'package:immich_mobile/infrastructure/repositories/backup.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
+import 'package:immich_mobile/models/server_info/server_info.model.dart';
 import 'package:immich_mobile/providers/app_settings.provider.dart';
 import 'package:immich_mobile/providers/backup/drift_backup.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/asset.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/storage.provider.dart';
+import 'package:immich_mobile/providers/server_info.provider.dart';
 import 'package:immich_mobile/repositories/asset_media.repository.dart';
 import 'package:immich_mobile/repositories/upload.repository.dart';
 import 'package:immich_mobile/services/api.service.dart';
@@ -34,6 +37,7 @@ final uploadServiceProvider = Provider((ref) {
     ref.watch(localAssetRepository),
     ref.watch(appSettingsServiceProvider),
     ref.watch(assetMediaRepositoryProvider),
+    ref.watch(serverInfoProvider),
   );
 
   ref.onDispose(service.dispose);
@@ -48,6 +52,7 @@ class UploadService {
     this._localAssetRepository,
     this._appSettingsService,
     this._assetMediaRepository,
+    this._serverInfo,
   ) {
     _uploadRepository.onUploadStatus = _onUploadCallback;
     _uploadRepository.onTaskProgress = _onTaskProgressCallback;
@@ -59,6 +64,7 @@ class UploadService {
   final DriftLocalAssetRepository _localAssetRepository;
   final AppSettingsService _appSettingsService;
   final AssetMediaRepository _assetMediaRepository;
+  final ServerInfo _serverInfo;
   final Logger _logger = Logger('UploadService');
 
   final StreamController<TaskStatusUpdate> _taskStatusController = StreamController<TaskStatusUpdate>.broadcast();
@@ -352,6 +358,10 @@ class UploadService {
       priority: priority,
       isFavorite: asset.isFavorite,
       requiresWiFi: requiresWiFi,
+      cloudId: asset.cloudId,
+      adjustmentTime: asset.adjustmentTime?.toIso8601String(),
+      latitude: asset.latitude?.toString(),
+      longitude: asset.longitude?.toString(),
     );
   }
 
@@ -383,6 +393,10 @@ class UploadService {
       priority: 0, // Highest priority to get upload immediately
       isFavorite: asset.isFavorite,
       requiresWiFi: requiresWiFi,
+      cloudId: asset.cloudId,
+      adjustmentTime: asset.adjustmentTime?.toIso8601String(),
+      latitude: asset.latitude?.toString(),
+      longitude: asset.longitude?.toString(),
     );
   }
 
@@ -410,6 +424,10 @@ class UploadService {
     int? priority,
     bool? isFavorite,
     bool requiresWiFi = true,
+    String? cloudId,
+    String? adjustmentTime,
+    String? latitude,
+    String? longitude,
   }) async {
     final serverEndpoint = Store.get(StoreKey.serverEndpoint);
     final url = Uri.parse('$serverEndpoint/assets').toString();
@@ -425,6 +443,20 @@ class UploadService {
       'isFavorite': isFavorite?.toString() ?? 'false',
       'duration': '0',
       if (fields != null) ...fields,
+      // Include cloudId and eTag in metadata if available and server version supports it
+      if (CurrentPlatform.isIOS && cloudId != null && _serverInfo.serverVersion.isAtLeast(major: 2, minor: 4))
+        'metadata': jsonEncode([
+          RemoteAssetMetadataItem(
+            key: RemoteAssetMetadataKey.mobileApp,
+            value: RemoteAssetMobileAppMetadata(
+              cloudId: cloudId,
+              createdAt: createdAt.toIso8601String(),
+              adjustmentTime: adjustmentTime,
+              latitude: latitude,
+              longitude: longitude,
+            ),
+          ),
+        ]),
     };
 
     return UploadTask(

mobile/lib/widgets/settings/beta_sync_settings/sync_status_and_actions.dart

@@ -194,7 +194,7 @@ class _SyncStatusIcon extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return switch (status) {
-      SyncStatus.idle => const Icon(Icons.pause_circle_outline_rounded),
+      SyncStatus.idle => const SizedBox.shrink(),
       SyncStatus.syncing => const SizedBox(height: 24, width: 24, child: CircularProgressIndicator(strokeWidth: 2)),
       SyncStatus.success => const Icon(Icons.check_circle_outline, color: Colors.green),
       SyncStatus.error => Icon(Icons.error_outline, color: context.colorScheme.error),

mobile/pigeon/native_sync_api.dart

@@ -90,6 +90,14 @@ class HashResult {
   const HashResult({required this.assetId, this.error, this.hash});
 }
 
+class CloudIdResult {
+  final String assetId;
+  final String? error;
+  final String? cloudId;
+
+  const CloudIdResult({required this.assetId, this.error, this.cloudId});
+}
+
 @HostApi()
 abstract class NativeSyncApi {
   bool shouldFullSync();
@@ -121,4 +129,7 @@ abstract class NativeSyncApi {
 
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   Map<String, List<PlatformAsset>> getTrashedAssets();
+
+  @TaskQueue(type: TaskQueueType.serialBackgroundThread)
+  List<CloudIdResult> getCloudIdForAssetIds(List<String> assetIds);
 }

mobile/test/domain/services/hash_service_test.dart

@@ -33,6 +33,7 @@ void main() {
     registerFallbackValue(LocalAssetStub.image1);
     registerFallbackValue(<String, String>{});
 
+    when(() => mockAssetRepo.getHashMappingFromCloudId()).thenAnswer((_) async => {});
     when(() => mockAssetRepo.updateHashes(any())).thenAnswer((_) async => {});
   });
 

mobile/test/domain/services/local_sync_service_test.dart

@@ -9,6 +9,7 @@ import 'package:immich_mobile/domain/services/store.service.dart';
 import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_album.repository.dart';
+import 'package:immich_mobile/infrastructure/repositories/local_asset.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/storage.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/store.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/trashed_local_asset.repository.dart';
@@ -25,6 +26,7 @@ import '../../repository.mocks.dart';
 void main() {
   late LocalSyncService sut;
   late DriftLocalAlbumRepository mockLocalAlbumRepository;
+  late DriftLocalAssetRepository mockLocalAssetRepository;
   late DriftTrashedLocalAssetRepository mockTrashedLocalAssetRepository;
   late LocalFilesManagerRepository mockLocalFilesManager;
   late StorageRepository mockStorageRepository;
@@ -47,6 +49,7 @@ void main() {
 
   setUp(() async {
     mockLocalAlbumRepository = MockLocalAlbumRepository();
+    mockLocalAssetRepository = MockLocalAssetRepository();
     mockTrashedLocalAssetRepository = MockTrashedLocalAssetRepository();
     mockLocalFilesManager = MockLocalFilesManagerRepository();
     mockStorageRepository = MockStorageRepository();
@@ -66,6 +69,7 @@ void main() {
 
     sut = LocalSyncService(
       localAlbumRepository: mockLocalAlbumRepository,
+      localAssetRepository: mockLocalAssetRepository,
       trashedLocalAssetRepository: mockTrashedLocalAssetRepository,
       localFilesManager: mockLocalFilesManager,
       storageRepository: mockStorageRepository,

mobile/test/services/upload.service_test.dart

@@ -1,14 +1,22 @@
+import 'dart:convert';
 import 'dart:io';
 
 import 'package:drift/drift.dart' hide isNull, isNotNull;
 import 'package:drift/native.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
+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/services/store.service.dart';
 import 'package:immich_mobile/entities/store.entity.dart';
 import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/store.repository.dart';
+import 'package:immich_mobile/models/server_info/server_config.model.dart';
+import 'package:immich_mobile/models/server_info/server_disk_info.model.dart';
+import 'package:immich_mobile/models/server_info/server_features.model.dart';
+import 'package:immich_mobile/models/server_info/server_info.model.dart';
+import 'package:immich_mobile/models/server_info/server_version.model.dart';
 import 'package:immich_mobile/services/app_settings.service.dart';
 import 'package:immich_mobile/services/upload.service.dart';
 import 'package:mocktail/mocktail.dart';
@@ -16,8 +24,29 @@ import 'package:mocktail/mocktail.dart';
 import '../domain/service.mock.dart';
 import '../fixtures/asset.stub.dart';
 import '../infrastructure/repository.mock.dart';
-import '../repository.mocks.dart';
 import '../mocks/asset_entity.mock.dart';
+import '../repository.mocks.dart';
+
+// Test ServerInfo stub
+const _serverInfo = ServerInfo(
+  serverVersion: ServerVersion(major: 2, minor: 4, patch: 0),
+  latestVersion: ServerVersion(major: 2, minor: 4, patch: 0),
+  serverFeatures: ServerFeatures(trash: true, map: true, oauthEnabled: false, passwordLogin: true, ocr: false),
+  serverConfig: ServerConfig(
+    trashDays: 30,
+    oauthButtonText: 'Login with OAuth',
+    externalDomain: '',
+    mapDarkStyleUrl: '',
+    mapLightStyleUrl: '',
+  ),
+  serverDiskInfo: ServerDiskInfo(
+    diskAvailable: '100GB',
+    diskSize: '500GB',
+    diskUse: '400GB',
+    diskUsagePercentage: 80.0,
+  ),
+  versionStatus: VersionStatus.upToDate,
+);
 
 void main() {
   late UploadService sut;
@@ -62,6 +91,7 @@ void main() {
       mockLocalAssetRepository,
       mockAppSettingsService,
       mockAssetMediaRepository,
+      _serverInfo,
     );
 
     mockUploadRepository.onUploadStatus = (_) {};
@@ -165,4 +195,227 @@ void main() {
       verify(() => mockAssetMediaRepository.getOriginalFilename(asset.id)).called(1);
     });
   });
+
+  group('Server Info - cloudId and eTag metadata', () {
+    test('should include cloudId and eTag metadata on iOS when server version is 2.4+', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final sutWithV24 = UploadService(
+        mockUploadRepository,
+        mockBackupRepository,
+        mockStorageRepository,
+        mockLocalAssetRepository,
+        mockAppSettingsService,
+        mockAssetMediaRepository,
+        _serverInfo,
+      );
+      addTearDown(() => sutWithV24.dispose());
+
+      final assetWithCloudId = LocalAsset(
+        id: 'test-asset-id',
+        name: 'test.jpg',
+        type: AssetType.image,
+        createdAt: DateTime(2025, 1, 1),
+        updatedAt: DateTime(2025, 1, 2),
+        cloudId: 'cloud-id-123',
+        latitude: 37.7749,
+        longitude: -122.4194,
+        adjustmentTime: DateTime(2026, 1, 2),
+      );
+
+      final mockEntity = MockAssetEntity();
+      final mockFile = File('/path/to/test.jpg');
+
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockStorageRepository.getAssetEntityForAsset(assetWithCloudId)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(assetWithCloudId.id)).thenAnswer((_) async => mockFile);
+      when(() => mockAssetMediaRepository.getOriginalFilename(assetWithCloudId.id)).thenAnswer((_) async => 'test.jpg');
+
+      final task = await sutWithV24.getUploadTask(assetWithCloudId);
+
+      expect(task, isNotNull);
+      expect(task!.fields.containsKey('metadata'), isTrue);
+
+      final metadata = jsonDecode(task.fields['metadata']!) as List;
+      expect(metadata, hasLength(1));
+      expect(metadata[0]['key'], equals('mobile-app'));
+      expect(metadata[0]['value']['iCloudId'], equals('cloud-id-123'));
+      expect(metadata[0]['value']['createdAt'], isNotNull);
+      expect(metadata[0]['value']['adjustmentTime'], isNotNull);
+      expect(metadata[0]['value']['latitude'], isNotNull);
+      expect(metadata[0]['value']['longitude'], isNotNull);
+    });
+
+    test('should NOT include metadata on iOS when server version is below 2.4', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final sutWithV23 = UploadService(
+        mockUploadRepository,
+        mockBackupRepository,
+        mockStorageRepository,
+        mockLocalAssetRepository,
+        mockAppSettingsService,
+        mockAssetMediaRepository,
+        _serverInfo.copyWith(
+          serverVersion: const ServerVersion(major: 2, minor: 3, patch: 0),
+          latestVersion: const ServerVersion(major: 2, minor: 3, patch: 0),
+        ),
+      );
+      addTearDown(() => sutWithV23.dispose());
+
+      final assetWithCloudId = LocalAsset(
+        id: 'test-asset-id',
+        name: 'test.jpg',
+        type: AssetType.image,
+        createdAt: DateTime(2025, 1, 1),
+        updatedAt: DateTime(2025, 1, 2),
+        cloudId: 'cloud-id-123',
+        latitude: 37.7749,
+        longitude: -122.4194,
+      );
+
+      final mockEntity = MockAssetEntity();
+      final mockFile = File('/path/to/test.jpg');
+
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockStorageRepository.getAssetEntityForAsset(assetWithCloudId)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(assetWithCloudId.id)).thenAnswer((_) async => mockFile);
+      when(() => mockAssetMediaRepository.getOriginalFilename(assetWithCloudId.id)).thenAnswer((_) async => 'test.jpg');
+
+      final task = await sutWithV23.getUploadTask(assetWithCloudId);
+
+      expect(task, isNotNull);
+      expect(task!.fields.containsKey('metadata'), isFalse);
+    });
+
+    test('should NOT include metadata on Android regardless of server version', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.android;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final sutAndroid = UploadService(
+        mockUploadRepository,
+        mockBackupRepository,
+        mockStorageRepository,
+        mockLocalAssetRepository,
+        mockAppSettingsService,
+        mockAssetMediaRepository,
+        _serverInfo,
+      );
+      addTearDown(() => sutAndroid.dispose());
+
+      final assetWithCloudId = LocalAsset(
+        id: 'test-asset-id',
+        name: 'test.jpg',
+        type: AssetType.image,
+        createdAt: DateTime(2025, 1, 1),
+        updatedAt: DateTime(2025, 1, 2),
+        cloudId: 'cloud-id-123',
+        latitude: 37.7749,
+        longitude: -122.4194,
+      );
+
+      final mockEntity = MockAssetEntity();
+      final mockFile = File('/path/to/test.jpg');
+
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockStorageRepository.getAssetEntityForAsset(assetWithCloudId)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(assetWithCloudId.id)).thenAnswer((_) async => mockFile);
+      when(() => mockAssetMediaRepository.getOriginalFilename(assetWithCloudId.id)).thenAnswer((_) async => 'test.jpg');
+
+      final task = await sutAndroid.getUploadTask(assetWithCloudId);
+
+      expect(task, isNotNull);
+      expect(task!.fields.containsKey('metadata'), isFalse);
+    });
+
+    test('should NOT include metadata when cloudId is null even on iOS with server 2.4+', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final sutWithV24 = UploadService(
+        mockUploadRepository,
+        mockBackupRepository,
+        mockStorageRepository,
+        mockLocalAssetRepository,
+        mockAppSettingsService,
+        mockAssetMediaRepository,
+        _serverInfo,
+      );
+      addTearDown(() => sutWithV24.dispose());
+
+      final assetWithoutCloudId = LocalAsset(
+        id: 'test-asset-id',
+        name: 'test.jpg',
+        type: AssetType.image,
+        createdAt: DateTime(2025, 1, 1),
+        updatedAt: DateTime(2025, 1, 2),
+        cloudId: null, // No cloudId
+      );
+
+      final mockEntity = MockAssetEntity();
+      final mockFile = File('/path/to/test.jpg');
+
+      when(() => mockEntity.isLivePhoto).thenReturn(false);
+      when(() => mockStorageRepository.getAssetEntityForAsset(assetWithoutCloudId)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(assetWithoutCloudId.id)).thenAnswer((_) async => mockFile);
+      when(
+        () => mockAssetMediaRepository.getOriginalFilename(assetWithoutCloudId.id),
+      ).thenAnswer((_) async => 'test.jpg');
+
+      final task = await sutWithV24.getUploadTask(assetWithoutCloudId);
+
+      expect(task, isNotNull);
+      expect(task!.fields.containsKey('metadata'), isFalse);
+    });
+
+    test('should include metadata for live photos with cloudId on iOS 2.4+', () async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      final sutWithV24 = UploadService(
+        mockUploadRepository,
+        mockBackupRepository,
+        mockStorageRepository,
+        mockLocalAssetRepository,
+        mockAppSettingsService,
+        mockAssetMediaRepository,
+        _serverInfo,
+      );
+      addTearDown(() => sutWithV24.dispose());
+
+      final assetWithCloudId = LocalAsset(
+        id: 'test-livephoto-id',
+        name: 'livephoto.heic',
+        type: AssetType.image,
+        createdAt: DateTime(2025, 1, 1),
+        updatedAt: DateTime(2025, 1, 2),
+        cloudId: 'cloud-id-livephoto',
+        latitude: 37.7749,
+        longitude: -122.4194,
+      );
+
+      final mockEntity = MockAssetEntity();
+      final mockFile = File('/path/to/livephoto.heic');
+
+      when(() => mockEntity.isLivePhoto).thenReturn(true);
+      when(() => mockStorageRepository.getAssetEntityForAsset(assetWithCloudId)).thenAnswer((_) async => mockEntity);
+      when(() => mockStorageRepository.getFileForAsset(assetWithCloudId.id)).thenAnswer((_) async => mockFile);
+      when(
+        () => mockAssetMediaRepository.getOriginalFilename(assetWithCloudId.id),
+      ).thenAnswer((_) async => 'livephoto.heic');
+
+      final task = await sutWithV24.getLivePhotoUploadTask(assetWithCloudId, 'video-123');
+
+      expect(task, isNotNull);
+      expect(task!.fields.containsKey('metadata'), isTrue);
+      expect(task.fields['livePhotoVideoId'], equals('video-123'));
+
+      final metadata = jsonDecode(task.fields['metadata']!) as List;
+      expect(metadata, hasLength(1));
+      expect(metadata[0]['key'], equals('mobile-app'));
+      expect(metadata[0]['value']['iCloudId'], equals('cloud-id-livephoto'));
+    });
+  });
 }