remove photo_manager dep for sync

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

@@ -245,6 +245,8 @@ interface NativeSyncApi {
   fun clearSyncCheckpoint()
   fun getAssetIdsForAlbum(albumId: String): List<String>
   fun getAlbums(): List<ImAlbum>
+  fun getAssetsCountSince(albumId: String, timestamp: Long): Long
+  fun getAssetsForAlbum(albumId: String, updatedTimeCond: Long?): List<ImAsset>
 
   companion object {
     /** The codec used by NativeSyncApi. */
@@ -350,6 +352,42 @@ interface NativeSyncApi {
           channel.setMessageHandler(null)
         }
       }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getAssetsCountSince$separatedMessageChannelSuffix", codec, taskQueue)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val albumIdArg = args[0] as String
+            val timestampArg = args[1] as Long
+            val wrapped: List<Any?> = try {
+              listOf(api.getAssetsCountSince(albumIdArg, timestampArg))
+            } catch (exception: Throwable) {
+              MessagesPigeonUtils.wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getAssetsForAlbum$separatedMessageChannelSuffix", codec, taskQueue)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val albumIdArg = args[0] as String
+            val updatedTimeCondArg = args[1] as Long?
+            val wrapped: List<Any?> = try {
+              listOf(api.getAssetsForAlbum(albumIdArg, updatedTimeCondArg))
+            } catch (exception: Throwable) {
+              MessagesPigeonUtils.wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
     }
   }
 }

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/MessagesImpl26.kt

@@ -18,10 +18,6 @@ class NativeSyncApiImpl26(context: Context) : NativeSyncApiImplBase(context), Na
     // No-op for Android 10 and below
   }
 
-  override fun getAssetIdsForAlbum(albumId: String): List<String> {
-    throw IllegalStateException("Method not supported on this Android version.")
-  }
-
   override fun getMediaChanges(): SyncDelta {
     throw IllegalStateException("Method not supported on this Android version.")
   }

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/MessagesImpl30.kt

@@ -47,12 +47,6 @@ class NativeSyncApiImpl30(context: Context) : NativeSyncApiImplBase(context), Na
     }
   }
 
-  override fun getAssetIdsForAlbum(albumId: String): List<String> = getAssets(
-    MediaStore.VOLUME_EXTERNAL,
-    "${MediaStore.Files.FileColumns.BUCKET_ID} = ? AND $MEDIA_SELECTION",
-    arrayOf(albumId, *MEDIA_SELECTION_ARGS)
-  ).mapNotNull { (it as? AssetResult.ValidAsset)?.asset?.id }.toList()
-
   override fun getMediaChanges(): SyncDelta {
     val genMap = getSavedGenerationMap()
     val currentVolumes = MediaStore.getExternalVolumeNames(ctx)
@@ -78,7 +72,7 @@ class NativeSyncApiImpl30(context: Context) : NativeSyncApiImplBase(context), Na
         storedGen.toString()
       )
 
-      getAssets(volume, selection, selectionArgs).forEach {
+      getAssets(getCursor(volume, selection, selectionArgs)).forEach {
         when (it) {
           is AssetResult.ValidAsset -> {
             changed.add(it.asset)

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

@@ -2,6 +2,7 @@ package app.alextran.immich.sync
 
 import android.annotation.SuppressLint
 import android.content.Context
+import android.database.Cursor
 import android.provider.MediaStore
 import java.io.File
 
@@ -10,6 +11,7 @@ sealed class AssetResult {
   data class InvalidAsset(val assetId: String) : AssetResult()
 }
 
+@SuppressLint("InlinedApi")
 open class NativeSyncApiImplBase(context: Context) {
   private val ctx: Context = context.applicationContext
 
@@ -20,14 +22,8 @@ open class NativeSyncApiImplBase(context: Context) {
       MediaStore.Files.FileColumns.MEDIA_TYPE_IMAGE.toString(),
       MediaStore.Files.FileColumns.MEDIA_TYPE_VIDEO.toString()
     )
-    }
+    const val BUCKET_SELECTION = "(${MediaStore.Files.FileColumns.BUCKET_ID} = ?)"
-
+    val ASSET_PROJECTION = arrayOf(
-    protected fun getAssets(
-        volume: String,
-        selection: String,
-        selectionArgs: Array<String>,
-    ): Sequence<AssetResult> {
-        val projection = arrayOf(
       MediaStore.MediaColumns._ID,
       MediaStore.MediaColumns.DATA,
       MediaStore.MediaColumns.DISPLAY_NAME,
@@ -38,61 +34,63 @@ open class NativeSyncApiImplBase(context: Context) {
       MediaStore.MediaColumns.BUCKET_ID,
       MediaStore.MediaColumns.DURATION
     )
+  }
 
-        return sequence {
+  protected fun getCursor(
-            ctx.contentResolver.query(
+    volume: String,
+    selection: String,
+    selectionArgs: Array<String>,
+    projection: Array<String> = ASSET_PROJECTION,
+    sortOrder: String? = null
+  ): Cursor? = ctx.contentResolver.query(
     MediaStore.Files.getContentUri(volume),
     projection,
     selection,
     selectionArgs,
-                null
+    sortOrder,
-            )?.use { cursor ->
+  )
-                val idColumn = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns._ID)
-                val dataColumn = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA)
-                val nameColumn = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DISPLAY_NAME)
-                val dateTakenColumn =
-                    cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATE_TAKEN)
-                val dateAddedColumn =
-                    cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATE_ADDED)
-                val dateModifiedColumn =
-                    cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATE_MODIFIED)
-                val mediaTypeColumn =
-                    cursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns.MEDIA_TYPE)
-                val bucketIdColumn = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.BUCKET_ID)
-                val durationColumn = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DURATION)
 
-                while (cursor.moveToNext()) {
+  protected fun getAssets(cursor: Cursor?): Sequence<AssetResult> {
-                    val id = cursor.getLong(idColumn).toString()
+    return sequence {
-                    val path = cursor.getString(dataColumn)
+      cursor?.use { c ->
+        val idColumn = c.getColumnIndexOrThrow(MediaStore.MediaColumns._ID)
+        val dataColumn = c.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA)
+        val nameColumn = c.getColumnIndexOrThrow(MediaStore.MediaColumns.DISPLAY_NAME)
+        val dateTakenColumn = c.getColumnIndexOrThrow(MediaStore.MediaColumns.DATE_TAKEN)
+        val dateAddedColumn = c.getColumnIndexOrThrow(MediaStore.MediaColumns.DATE_ADDED)
+        val dateModifiedColumn = c.getColumnIndexOrThrow(MediaStore.MediaColumns.DATE_MODIFIED)
+        val mediaTypeColumn = c.getColumnIndexOrThrow(MediaStore.Files.FileColumns.MEDIA_TYPE)
+        val bucketIdColumn = c.getColumnIndexOrThrow(MediaStore.MediaColumns.BUCKET_ID)
+        val durationColumn = c.getColumnIndexOrThrow(MediaStore.MediaColumns.DURATION)
+
+        while (c.moveToNext()) {
+          val id = c.getLong(idColumn).toString()
+
+          val path = c.getString(dataColumn)
           if (path.isNullOrBlank() || !File(path).exists()) {
             yield(AssetResult.InvalidAsset(id))
             continue
           }
 
-                    val mediaType = cursor.getInt(mediaTypeColumn)
+          val mediaType = c.getInt(mediaTypeColumn)
-                    val name = cursor.getString(nameColumn)
+          val name = c.getString(nameColumn)
           // Date taken is milliseconds since epoch, Date added is seconds since epoch
-                    val createdAt = (cursor.getLong(dateTakenColumn).takeIf { it > 0 }?.div(1000))
+          val createdAt = (c.getLong(dateTakenColumn).takeIf { it > 0 }?.div(1000))
-                        ?: cursor.getLong(dateAddedColumn)
+            ?: c.getLong(dateAddedColumn)
           // Date modified is seconds since epoch
-                    val modifiedAt = cursor.getLong(dateModifiedColumn)
+          val modifiedAt = c.getLong(dateModifiedColumn)
           // Duration is milliseconds
           val duration = if (mediaType == MediaStore.Files.FileColumns.MEDIA_TYPE_IMAGE) 0
-                    else cursor.getLong(durationColumn) / 1000
+          else c.getLong(durationColumn) / 1000
-                    val bucketId = cursor.getString(bucketIdColumn)
+          val bucketId = c.getString(bucketIdColumn)
 
-                    yield(
+          val asset = ImAsset(id, name, mediaType.toLong(), createdAt, modifiedAt, duration)
-                        AssetResult.ValidAsset(
+          yield(AssetResult.ValidAsset(asset, bucketId))
-                            ImAsset(id, name, mediaType.toLong(), createdAt, modifiedAt, duration),
-                            bucketId
-                        )
-                    )
         }
       }
     }
   }
 
-    @SuppressLint("InlinedApi")
   fun getAlbums(): List<ImAlbum> {
     val albums = mutableListOf<ImAlbum>()
     val albumsCount = mutableMapOf<String, Int>()
@@ -105,11 +103,11 @@ open class NativeSyncApiImplBase(context: Context) {
     val selection =
       "(${MediaStore.Files.FileColumns.BUCKET_ID} IS NOT NULL) AND $MEDIA_SELECTION"
 
-        ctx.contentResolver.query(
+    getCursor(
-            MediaStore.Files.getContentUri(MediaStore.VOLUME_EXTERNAL),
+      MediaStore.VOLUME_EXTERNAL,
-            projection,
       selection,
       MEDIA_SELECTION_ARGS,
+      projection,
       "${MediaStore.Files.FileColumns.DATE_MODIFIED} DESC"
     )?.use { cursor ->
       val bucketIdColumn =
@@ -121,6 +119,7 @@ open class NativeSyncApiImplBase(context: Context) {
 
       while (cursor.moveToNext()) {
         val id = cursor.getString(bucketIdColumn)
+
         val count = albumsCount.getOrDefault(id, 0)
         if (count != 0) {
           albumsCount[id] = count + 1
@@ -134,9 +133,45 @@ open class NativeSyncApiImplBase(context: Context) {
       }
     }
 
-        return albums.map { album ->
+    return albums.map { it.copy(assetCount = albumsCount[it.id]?.toLong() ?: 0) }
-            val count = albumsCount[album.id] ?: 0
+      .sortedBy { it.id }
-            album.copy(assetCount = count.toLong())
+  }
-        }.sortedBy { it.id }
+
+  fun getAssetIdsForAlbum(albumId: String): List<String> {
+    val projection = arrayOf(MediaStore.MediaColumns._ID)
+
+    return getCursor(
+      MediaStore.VOLUME_EXTERNAL,
+      "$BUCKET_SELECTION AND $MEDIA_SELECTION",
+      arrayOf(albumId, *MEDIA_SELECTION_ARGS),
+      projection
+    )?.use { cursor ->
+      val idColumn = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns._ID)
+      generateSequence {
+        if (cursor.moveToNext()) cursor.getLong(idColumn).toString() else null
+      }.toList()
+    } ?: emptyList()
+  }
+
+  fun getAssetsCountSince(albumId: String, timestamp: Long): Long =
+    getCursor(
+      MediaStore.VOLUME_EXTERNAL,
+      "$BUCKET_SELECTION AND ${MediaStore.Files.FileColumns.DATE_ADDED} > ? AND $MEDIA_SELECTION",
+      arrayOf(albumId, timestamp.toString(), *MEDIA_SELECTION_ARGS),
+    )?.use { cursor -> cursor.count.toLong() } ?: 0L
+
+
+  fun getAssetsForAlbum(albumId: String, updatedTimeCond: Long?): List<ImAsset> {
+    var selection = "$BUCKET_SELECTION AND $MEDIA_SELECTION"
+    val selectionArgs = mutableListOf(albumId, *MEDIA_SELECTION_ARGS)
+
+    if (updatedTimeCond != null) {
+      selection += " AND (${MediaStore.Files.FileColumns.DATE_MODIFIED} > ? OR ${MediaStore.Files.FileColumns.DATE_ADDED} > ?)"
+      selectionArgs.addAll(listOf(updatedTimeCond.toString(), updatedTimeCond.toString()))
+    }
+
+    return getAssets(getCursor(MediaStore.VOLUME_EXTERNAL, selection, selectionArgs.toTypedArray()))
+      .mapNotNull { result -> (result as? AssetResult.ValidAsset)?.asset }
+      .toList()
   }
 }

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

@@ -305,6 +305,8 @@ protocol NativeSyncApi {
   func clearSyncCheckpoint() throws
   func getAssetIdsForAlbum(albumId: String) throws -> [String]
   func getAlbums() throws -> [ImAlbum]
+  func getAssetsCountSince(albumId: String, timestamp: Int64) throws -> Int64
+  func getAssetsForAlbum(albumId: String, updatedTimeCond: Int64?) throws -> [ImAsset]
 }
 
 /// Generated setup class from Pigeon to handle messages through the `binaryMessenger`.
@@ -404,5 +406,41 @@ class NativeSyncApiSetup {
     } else {
       getAlbumsChannel.setMessageHandler(nil)
     }
+    let getAssetsCountSinceChannel = taskQueue == nil
+      ? FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getAssetsCountSince\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
+      : FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getAssetsCountSince\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec, taskQueue: taskQueue)
+    if let api = api {
+      getAssetsCountSinceChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let albumIdArg = args[0] as! String
+        let timestampArg = args[1] as! Int64
+        do {
+          let result = try api.getAssetsCountSince(albumId: albumIdArg, timestamp: timestampArg)
+          reply(wrapResult(result))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      getAssetsCountSinceChannel.setMessageHandler(nil)
+    }
+    let getAssetsForAlbumChannel = taskQueue == nil
+      ? FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getAssetsForAlbum\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec)
+      : FlutterBasicMessageChannel(name: "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getAssetsForAlbum\(channelSuffix)", binaryMessenger: binaryMessenger, codec: codec, taskQueue: taskQueue)
+    if let api = api {
+      getAssetsForAlbumChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let albumIdArg = args[0] as! String
+        let updatedTimeCondArg: Int64? = nilOrValue(args[1])
+        do {
+          let result = try api.getAssetsForAlbum(albumId: albumIdArg, updatedTimeCond: updatedTimeCondArg)
+          reply(wrapResult(result))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      getAssetsForAlbumChannel.setMessageHandler(nil)
+    }
   }
 }

mobile/ios/Runner/Sync/MessagesImpl.swift

@@ -199,4 +199,36 @@ class NativeSyncApiImpl: NativeSyncApi {
     }
     return ids
   }
+  
+  func getAssetsCountSince(albumId: String, timestamp: Int64) throws -> Int64 {
+    let collections = PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [albumId], options: nil)
+    guard let album = collections.firstObject else {
+      return 0
+    }
+    
+    let date = NSDate(timeIntervalSince1970: TimeInterval(timestamp))
+    let options = PHFetchOptions()
+    options.predicate = NSPredicate(format: "creationDate > %@ OR modificationDate > %@", date, date)
+    let assets = PHAsset.fetchAssets(in: album, options: options)
+    return Int64(assets.count)
+  }
+  
+  func getAssetsForAlbum(albumId: String, updatedTimeCond: Int64?) throws -> [ImAsset] {
+    let collections = PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [albumId], options: nil)
+    guard let album = collections.firstObject else {
+      return []
+    }
+    
+    let options = PHFetchOptions()
+    if(updatedTimeCond != nil) {
+      let date = NSDate(timeIntervalSince1970: TimeInterval(updatedTimeCond!))
+      options.predicate = NSPredicate(format: "creationDate > %@ OR modificationDate > %@", date, date)
+    }
+    let result = PHAsset.fetchAssets(in: album, options: options)
+    var assets: [ImAsset] = []
+    result.enumerateObjects { (asset, _, _) in
+      assets.append(asset.toImAsset())
+    }
+    return assets
+  }
 }

mobile/lib/domain/interfaces/album_media.interface.dart

@@ -1,15 +0,0 @@
-import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
-
-abstract interface class IAlbumMediaRepository {
-  Future<List<LocalAsset>> getAssetsForAlbum(
-    String albumId, {
-    DateTimeFilter? updateTimeCond,
-  });
-}
-
-class DateTimeFilter {
-  final DateTime min;
-  final DateTime max;
-
-  const DateTimeFilter({required this.min, required this.max});
-}

mobile/lib/domain/interfaces/local_album.interface.dart

@@ -1,7 +1,6 @@
 import 'package:immich_mobile/domain/interfaces/db.interface.dart';
 import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/domain/models/local_album.model.dart';
-import 'package:immich_mobile/platform/native_sync_api.g.dart';
 
 abstract interface class ILocalAlbumRepository implements IDatabaseRepository {
   Future<List<LocalAlbum>> getAll({SortLocalAlbumsBy? sortBy});
@@ -20,7 +19,11 @@ abstract interface class ILocalAlbumRepository implements IDatabaseRepository {
 
   Future<void> delete(String albumId);
 
-  Future<void> processDelta(SyncDelta delta);
+  Future<void> processDelta({
+    required List<LocalAsset> updates,
+    required List<String> deletes,
+    required Map<String, List<String>> assetAlbums,
+  });
 
   Future<void> syncAlbumDeletes(
     String albumId,

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

@@ -2,7 +2,6 @@ import 'dart:async';
 
 import 'package:collection/collection.dart';
 import 'package:flutter/widgets.dart';
-import 'package:immich_mobile/domain/interfaces/album_media.interface.dart';
 import 'package:immich_mobile/domain/interfaces/local_album.interface.dart';
 import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/domain/models/local_album.model.dart';
@@ -15,7 +14,6 @@ import 'package:logging/logging.dart';
 import 'package:platform/platform.dart';
 
 class DeviceSyncService {
-  final IAlbumMediaRepository _albumMediaRepository;
   final ILocalAlbumRepository _localAlbumRepository;
   final NativeSyncApi _nativeSyncApi;
   final Platform _platform;
@@ -23,13 +21,11 @@ class DeviceSyncService {
   final Logger _log = Logger("DeviceSyncService");
 
   DeviceSyncService({
-    required IAlbumMediaRepository albumMediaRepository,
     required ILocalAlbumRepository localAlbumRepository,
     required NativeSyncApi nativeSyncApi,
     required StoreService storeService,
     Platform? platform,
-  })  : _albumMediaRepository = albumMediaRepository,
+  })  : _localAlbumRepository = localAlbumRepository,
-        _localAlbumRepository = localAlbumRepository,
         _nativeSyncApi = nativeSyncApi,
         _storeService = storeService,
         _platform = platform ?? const LocalPlatform();
@@ -58,7 +54,11 @@ class DeviceSyncService {
 
       final deviceAlbums = await _nativeSyncApi.getAlbums();
       await _localAlbumRepository.updateAll(deviceAlbums.toLocalAlbums());
-      await _localAlbumRepository.processDelta(delta);
+      await _localAlbumRepository.processDelta(
+        updates: delta.updates.toLocalAssets(),
+        deletes: delta.deletes,
+        assetAlbums: delta.assetAlbums,
+      );
 
       final dbAlbums = await _localAlbumRepository.getAll();
       // On Android, we need to sync all albums since it is not possible to
@@ -135,10 +135,13 @@ class DeviceSyncService {
       _log.fine("Adding device album ${album.name}");
 
       final assets = album.assetCount > 0
-          ? await _albumMediaRepository.getAssetsForAlbum(album.id)
+          ? await _nativeSyncApi.getAssetsForAlbum(album.id)
-          : <LocalAsset>[];
+          : <ImAsset>[];
 
-      await _localAlbumRepository.upsert(album, toUpsert: assets);
+      await _localAlbumRepository.upsert(
+        album,
+        toUpsert: assets.toLocalAssets(),
+      );
       _log.fine("Successfully added device album ${album.name}");
     } catch (e, s) {
       _log.warning("Error while adding device album", e, s);
@@ -198,17 +201,13 @@ class DeviceSyncService {
         return false;
       }
 
-      // Get all assets that are modified after the last known modifiedTime
+      final updatedTime =
-      final newAssets = await _albumMediaRepository.getAssetsForAlbum(
+          (dbAlbum.updatedAt.millisecondsSinceEpoch ~/ 1000) + 1;
-        deviceAlbum.id,
+      final newAssetsCount =
-        updateTimeCond: DateTimeFilter(
+          await _nativeSyncApi.getAssetsCountSince(deviceAlbum.id, updatedTime);
-          min: dbAlbum.updatedAt.add(const Duration(seconds: 1)),
-          max: deviceAlbum.updatedAt,
-        ),
-      );
 
       // Early return if no new assets were found
-      if (newAssets.isEmpty) {
+      if (newAssetsCount == 0) {
         _log.fine(
           "No new assets found despite album having changes. Proceeding to full sync for ${dbAlbum.name}",
         );
@@ -216,14 +215,19 @@ class DeviceSyncService {
       }
 
       // Check whether there is only addition or if there has been deletions
-      if (deviceAlbum.assetCount != dbAlbum.assetCount + newAssets.length) {
+      if (deviceAlbum.assetCount != dbAlbum.assetCount + newAssetsCount) {
         _log.fine("Local album has modifications. Proceeding to full sync");
         return false;
       }
 
+      final newAssets = await _nativeSyncApi.getAssetsForAlbum(
+        deviceAlbum.id,
+        updatedTimeCond: updatedTime,
+      );
+
       await _localAlbumRepository.upsert(
         deviceAlbum.copyWith(backupSelection: dbAlbum.backupSelection),
-        toUpsert: newAssets,
+        toUpsert: newAssets.toLocalAssets(),
       );
 
       return true;
@@ -239,7 +243,9 @@ class DeviceSyncService {
   Future<bool> fullDiff(LocalAlbum dbAlbum, LocalAlbum deviceAlbum) async {
     try {
       final assetsInDevice = deviceAlbum.assetCount > 0
-          ? await _albumMediaRepository.getAssetsForAlbum(deviceAlbum.id)
+          ? await _nativeSyncApi
+              .getAssetsForAlbum(deviceAlbum.id)
+              .then((a) => a.toLocalAssets())
           : <LocalAsset>[];
       final assetsInDb = dbAlbum.assetCount > 0
           ? await _localAlbumRepository.getAssetsForAlbum(dbAlbum.id)
@@ -348,3 +354,22 @@ extension on Iterable<ImAlbum> {
     ).toList();
   }
 }
+
+extension on Iterable<ImAsset> {
+  List<LocalAsset> toLocalAssets() {
+    return map(
+      (e) => LocalAsset(
+        id: e.id,
+        name: e.name,
+        type: AssetType.values.elementAtOrNull(e.type) ?? AssetType.other,
+        createdAt: e.createdAt == null
+            ? DateTime.now()
+            : DateTime.fromMillisecondsSinceEpoch(e.createdAt! * 1000),
+        updatedAt: e.updatedAt == null
+            ? DateTime.now()
+            : DateTime.fromMillisecondsSinceEpoch(e.updatedAt! * 1000),
+        durationInSeconds: e.durationInSeconds,
+      ),
+    ).toList();
+  }
+}

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

@@ -1,76 +0,0 @@
-import 'package:immich_mobile/constants/constants.dart';
-import 'package:immich_mobile/domain/interfaces/album_media.interface.dart';
-import 'package:immich_mobile/domain/models/asset/base_asset.model.dart'
-    as asset;
-import 'package:photo_manager/photo_manager.dart';
-
-class AlbumMediaRepository implements IAlbumMediaRepository {
-  const AlbumMediaRepository();
-
-  PMFilter _getAlbumFilter({
-    DateTimeFilter? createdTimeCond,
-    DateTimeFilter? updateTimeCond,
-  }) =>
-      FilterOptionGroup(
-        imageOption: const FilterOption(
-          // needTitle is expected to be slow on iOS but is required to fetch the asset title
-          needTitle: true,
-          sizeConstraint: SizeConstraint(ignoreSize: true),
-        ),
-        videoOption: const FilterOption(
-          needTitle: true,
-          sizeConstraint: SizeConstraint(ignoreSize: true),
-          durationConstraint: DurationConstraint(allowNullable: true),
-        ),
-        // This is needed to get the modified time of the album
-        containsPathModified: true,
-        createTimeCond: createdTimeCond == null
-            ? DateTimeCond.def().copyWith(ignore: true)
-            : DateTimeCond(min: createdTimeCond.min, max: createdTimeCond.max),
-        updateTimeCond: updateTimeCond == null
-            ? DateTimeCond.def().copyWith(ignore: true)
-            : DateTimeCond(min: updateTimeCond.min, max: updateTimeCond.max),
-        orders: [],
-      );
-
-  @override
-  Future<List<asset.LocalAsset>> getAssetsForAlbum(
-    String albumId, {
-    DateTimeFilter? updateTimeCond,
-  }) async {
-    final assetPathEntity = await AssetPathEntity.obtainPathFromProperties(
-      id: albumId,
-      optionGroup: _getAlbumFilter(updateTimeCond: updateTimeCond),
-    );
-    final assets = <AssetEntity>[];
-    int pageNumber = 0, lastPageCount = 0;
-    do {
-      final page = await assetPathEntity.getAssetListPaged(
-        page: pageNumber,
-        size: kFetchLocalAssetsBatchSize,
-      );
-      assets.addAll(page);
-      lastPageCount = page.length;
-      pageNumber++;
-    } while (lastPageCount == kFetchLocalAssetsBatchSize);
-    return Future.wait(assets.map((a) => a.toDto()));
-  }
-}
-
-extension on AssetEntity {
-  Future<asset.LocalAsset> toDto() async => asset.LocalAsset(
-        id: id,
-        name: title ?? await titleAsync,
-        type: switch (type) {
-          AssetType.other => asset.AssetType.other,
-          AssetType.image => asset.AssetType.image,
-          AssetType.video => asset.AssetType.video,
-          AssetType.audio => asset.AssetType.audio,
-        },
-        createdAt: createDateTime,
-        updatedAt: modifiedDateTime,
-        width: width,
-        height: height,
-        durationInSeconds: duration,
-      );
-}

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

@@ -6,7 +6,6 @@ import 'package:immich_mobile/infrastructure/entities/local_album.entity.drift.d
 import 'package:immich_mobile/infrastructure/entities/local_album_asset.entity.drift.dart';
 import 'package:immich_mobile/infrastructure/entities/local_asset.entity.drift.dart';
 import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
-import 'package:immich_mobile/platform/native_sync_api.g.dart';
 import 'package:platform/platform.dart';
 
 class DriftLocalAlbumRepository extends DriftDatabaseRepository
@@ -187,19 +186,21 @@ class DriftLocalAlbumRepository extends DriftDatabaseRepository
   }
 
   @override
-  Future<void> processDelta(SyncDelta delta) {
+  Future<void> processDelta({
+    required List<LocalAsset> updates,
+    required List<String> deletes,
+    required Map<String, List<String>> assetAlbums,
+  }) {
     return _db.transaction(() async {
-      await _deleteAssets(delta.deletes);
+      await _deleteAssets(deletes);
 
-      await _upsertAssets(delta.updates.map((a) => a.toLocalAsset()));
+      await _upsertAssets(updates);
       // The ugly casting below is required for now because the generated code
       // casts the returned values from the platform during decoding them
       // and iterating over them causes the type to be List<Object?> instead of
       // List<String>
       await _db.batch((batch) async {
-        delta.assetAlbums
+        assetAlbums.cast<String, List<Object?>>().forEach((assetId, albumIds) {
-            .cast<String, List<Object?>>()
-            .forEach((assetId, albumIds) {
           batch.deleteWhere(
             _db.localAlbumAssetEntity,
             (f) =>
@@ -209,9 +210,7 @@ class DriftLocalAlbumRepository extends DriftDatabaseRepository
         });
       });
       await _db.batch((batch) async {
-        delta.assetAlbums
+        assetAlbums.cast<String, List<Object?>>().forEach((assetId, albumIds) {
-            .cast<String, List<Object?>>()
-            .forEach((assetId, albumIds) {
           batch.insertAll(
             _db.localAlbumAssetEntity,
             albumIds.cast<String?>().nonNulls.map(
@@ -339,24 +338,7 @@ class DriftLocalAlbumRepository extends DriftDatabaseRepository
   }
 }
 
-extension on ImAsset {
+extension on LocalAlbumEntityData {
-  LocalAsset toLocalAsset() {
-    return LocalAsset(
-      id: id,
-      name: name,
-      type: AssetType.values.elementAtOrNull(type) ?? AssetType.other,
-      createdAt: createdAt == null
-          ? DateTime.now()
-          : DateTime.fromMillisecondsSinceEpoch(createdAt! * 1000),
-      updatedAt: updatedAt == null
-          ? DateTime.now()
-          : DateTime.fromMillisecondsSinceEpoch(updatedAt! * 1000),
-      durationInSeconds: durationInSeconds,
-    );
-  }
-}
-
-extension LocalAlbumEntityX on LocalAlbumEntityData {
   LocalAlbum toDto({int assetCount = 0}) {
     return LocalAlbum(
       id: id,

mobile/lib/platform/native_sync_api.g.dart

@@ -419,4 +419,60 @@ class NativeSyncApi {
       return (pigeonVar_replyList[0] as List<Object?>?)!.cast<ImAlbum>();
     }
   }
+
+  Future<int> getAssetsCountSince(String albumId, int timestamp) async {
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.immich_mobile.NativeSyncApi.getAssetsCountSince$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[albumId, timestamp]);
+    final List<Object?>? pigeonVar_replyList =
+        await pigeonVar_sendFuture as List<Object?>?;
+    if (pigeonVar_replyList == null) {
+      throw _createConnectionError(pigeonVar_channelName);
+    } else if (pigeonVar_replyList.length > 1) {
+      throw PlatformException(
+        code: pigeonVar_replyList[0]! as String,
+        message: pigeonVar_replyList[1] as String?,
+        details: pigeonVar_replyList[2],
+      );
+    } else if (pigeonVar_replyList[0] == null) {
+      throw PlatformException(
+        code: 'null-error',
+        message: 'Host platform returned null value for non-null return value.',
+      );
+    } else {
+      return (pigeonVar_replyList[0] as int?)!;
+    }
+  }
+
+  Future<List<ImAsset>> getAssetsForAlbum(String albumId, {int? updatedTimeCond}) async {
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.immich_mobile.NativeSyncApi.getAssetsForAlbum$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[albumId, updatedTimeCond]);
+    final List<Object?>? pigeonVar_replyList =
+        await pigeonVar_sendFuture as List<Object?>?;
+    if (pigeonVar_replyList == null) {
+      throw _createConnectionError(pigeonVar_channelName);
+    } else if (pigeonVar_replyList.length > 1) {
+      throw PlatformException(
+        code: pigeonVar_replyList[0]! as String,
+        message: pigeonVar_replyList[1] as String?,
+        details: pigeonVar_replyList[2],
+      );
+    } else if (pigeonVar_replyList[0] == null) {
+      throw PlatformException(
+        code: 'null-error',
+        message: 'Host platform returned null value for non-null return value.',
+      );
+    } else {
+      return (pigeonVar_replyList[0] as List<Object?>?)!.cast<ImAsset>();
+    }
+  }
 }

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

@@ -1,13 +1,8 @@
 import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:immich_mobile/domain/interfaces/album_media.interface.dart';
 import 'package:immich_mobile/domain/interfaces/local_album.interface.dart';
-import 'package:immich_mobile/infrastructure/repositories/album_media.repository.dart';
 import 'package:immich_mobile/infrastructure/repositories/local_album.repository.dart';
 import 'package:immich_mobile/providers/infrastructure/db.provider.dart';
 
-final albumMediaRepositoryProvider =
-    Provider<IAlbumMediaRepository>((ref) => const AlbumMediaRepository());
-
 final localAlbumRepository = Provider<ILocalAlbumRepository>(
   (ref) => DriftLocalAlbumRepository(ref.watch(driftProvider)),
 );

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

@@ -28,7 +28,6 @@ final syncStreamRepositoryProvider = Provider(
 
 final deviceSyncServiceProvider = Provider(
   (ref) => DeviceSyncService(
-    albumMediaRepository: ref.watch(albumMediaRepositoryProvider),
     localAlbumRepository: ref.watch(localAlbumRepository),
     nativeSyncApi: ref.watch(nativeSyncApiProvider),
     storeService: ref.watch(storeServiceProvider),

mobile/pigeon/native_sync_api.dart

@@ -80,4 +80,10 @@ abstract class NativeSyncApi {
 
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   List<ImAlbum> getAlbums();
+
+  @TaskQueue(type: TaskQueueType.serialBackgroundThread)
+  int getAssetsCountSince(String albumId, int timestamp);
+
+  @TaskQueue(type: TaskQueueType.serialBackgroundThread)
+  List<ImAsset> getAssetsForAlbum(String albumId, {int? updatedTimeCond});
 }