Refresh after receiving native exif event

app/lib/event/native_event.dart

@@ -3,8 +3,11 @@ import 'dart:convert';
 
 import 'package:logging/logging.dart';
 import 'package:nc_photos/stream_extension.dart';
+import 'package:np_codegen/np_codegen.dart';
 import 'package:np_platform_message_relay/np_platform_message_relay.dart';
 
+part 'native_event.g.dart';
+
 class NativeEventListener<T> {
   NativeEventListener(this.listener);
 
@@ -43,6 +46,7 @@ class NativeEventListener<T> {
       Logger("event.native_event.NativeEventListener<${T.runtimeType}>");
 }
 
+@npLog
 class FileExifUpdatedEvent {
   const FileExifUpdatedEvent(this.fileIds);
 

app/lib/event/native_event.g.dart

@@ -0,0 +1,14 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'native_event.dart';
+
+// **************************************************************************
+// NpLogGenerator
+// **************************************************************************
+
+extension _$FileExifUpdatedEventNpLog on FileExifUpdatedEvent {
+  // ignore: unused_element
+  Logger get _log => log;
+
+  static final log = Logger("event.native_event.FileExifUpdatedEvent");
+}

app/lib/widget/home_photos/bloc.dart

@@ -57,6 +57,8 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
     _subscriptions.add(prefController.isEnableExif.listen((event) {
       add(_SetEnableExif(event));
     }));
+
+    _nativeFileExifUpdatedListener?.begin();
   }
 
   @override
@@ -64,6 +66,7 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
     for (final s in _subscriptions) {
       s.cancel();
     }
+    _nativeFileExifUpdatedListener?.end();
     return super.close();
   }
 
@@ -302,6 +305,14 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
     emit(state.copyWith(error: ExceptionEvent(ev.error, ev.stackTrace)));
   }
 
+  void _onNativeFileExifUpdated(FileExifUpdatedEvent ev) {
+    _log.info(ev);
+    _refreshThrottler.trigger(
+      maxResponceTime: const Duration(seconds: 3),
+      maxPendingCount: 10,
+    );
+  }
+
   Future _transformItems(List<FileDescriptor> files) async {
     _log.info("[_transformItems] Queue ${files.length} items");
     _itemTransformerQueue.addJob(
@@ -389,6 +400,18 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
   final _subscriptions = <StreamSubscription>[];
   var _isHandlingError = false;
   var _isInitialLoad = true;
+
+  // Listen to updates from background isolates as the memories are not shared
+  late final _nativeFileExifUpdatedListener =
+      getRawPlatform() == NpPlatform.android
+          ? NativeEventListener<FileExifUpdatedEvent>(_onNativeFileExifUpdated)
+          : null;
+  late final _refreshThrottler = Throttler(
+    onTriggered: (_) {
+      add(const _Reload());
+    },
+    logTag: _log.name,
+  );
 }
 
 _ItemTransformerResult _buildItem(_ItemTransformerArgument arg) {

app/lib/widget/home_photos2.dart

@@ -27,6 +27,7 @@ import 'package:nc_photos/entity/collection.dart';
 import 'package:nc_photos/entity/file_descriptor.dart';
 import 'package:nc_photos/entity/file_util.dart' as file_util;
 import 'package:nc_photos/event/event.dart';
+import 'package:nc_photos/event/native_event.dart';
 import 'package:nc_photos/exception_event.dart';
 import 'package:nc_photos/exception_util.dart' as exception_util;
 import 'package:nc_photos/flutter_util.dart' as flutter_util;
@@ -37,6 +38,7 @@ import 'package:nc_photos/service.dart' as service;
 import 'package:nc_photos/snack_bar_manager.dart';
 import 'package:nc_photos/theme.dart';
 import 'package:nc_photos/theme/dimension.dart';
+import 'package:nc_photos/throttler.dart';
 import 'package:nc_photos/widget/collection_browser.dart';
 import 'package:nc_photos/widget/collection_picker.dart';
 import 'package:nc_photos/widget/file_sharer_dialog.dart';
@@ -55,6 +57,7 @@ import 'package:np_codegen/np_codegen.dart';
 import 'package:np_collection/np_collection.dart';
 import 'package:np_common/object_util.dart';
 import 'package:np_common/or_null.dart';
+import 'package:np_platform_util/np_platform_util.dart';
 import 'package:to_string/to_string.dart';
 import 'package:visibility_detector/visibility_detector.dart';