feat(mobile): open assetviewer via album activities page

mobile/lib/services/activity.service.dart

@@ -1,16 +1,24 @@
+import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/constants/errors.dart';
+import 'package:immich_mobile/domain/services/asset.service.dart';
+import 'package:immich_mobile/domain/services/timeline.service.dart';
 import 'package:immich_mobile/mixins/error_logger.mixin.dart';
 import 'package:immich_mobile/models/activities/activity.model.dart';
+import 'package:immich_mobile/presentation/widgets/asset_viewer/asset_viewer.page.dart';
 import 'package:immich_mobile/repositories/activity_api.repository.dart';
+import 'package:immich_mobile/routing/router.dart';
 import 'package:logging/logging.dart';
+import 'package:immich_mobile/entities/store.entity.dart' as immich_store;
 
 class ActivityService with ErrorLoggerMixin {
   final ActivityApiRepository _activityApiRepository;
+  final TimelineFactory _timelineFactory;
+  final AssetService _assetService;
 
   @override
   final Logger logger = Logger("ActivityService");
 
-  ActivityService(this._activityApiRepository);
+  ActivityService(this._activityApiRepository, this._timelineFactory, this._assetService);
 
   Future<List<Activity>> getAllActivities(String albumId, {String? assetId}) async {
     return logError(
@@ -49,4 +57,21 @@ class ActivityService with ErrorLoggerMixin {
       errorMessage: "Failed to create $type for album $albumId",
     );
   }
+
+  Future<AssetViewerRoute?> buildAssetViewerRoute(String assetId, WidgetRef ref) async {
+    if (immich_store.Store.isBetaTimelineEnabled) {
+      final asset = await _assetService.getRemoteAsset(assetId);
+      if (asset == null) {
+        return null;
+      }
+
+      AssetViewer.setAsset(ref, asset);
+      return AssetViewerRoute(
+        initialIndex: 0,
+        timelineService: _timelineFactory.fromAssets([asset], TimelineOrigin.albumActivities),
+      );
+    }
+
+    return null;
+  }
 }