preliminary auto-login

mobile-v2/lib/utils/isolate_helper.dart

@@ -1,4 +1,8 @@
+import 'dart:async';
+import 'dart:isolate';
+
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:immich_mobile/domain/repositories/database.repository.dart';
 import 'package:immich_mobile/service_locator.dart';
 import 'package:immich_mobile/utils/immich_api_client.dart';
@@ -12,10 +16,13 @@ class _ImApiClientData {
   const _ImApiClientData({required this.endpoint, required this.headersMap});
 }
 
+// !! Should be used only from the root isolate
 class IsolateHelper {
   // Cache the ApiClient to reconstruct it later after inside the isolate
   late final _ImApiClientData? _clientData;
 
+  static RootIsolateToken get _rootToken => RootIsolateToken.instance!;
+
   IsolateHelper();
 
   void preIsolateHandling() {
@@ -26,7 +33,7 @@ class IsolateHelper {
     );
   }
 
-  void postIsolateHandling({required DriftDatabaseRepository database}) {
+  void postIsolateHandling() {
     assert(_clientData != null);
     // Reconstruct client from cached data
     final client = ImmichApiClient(endpoint: _clientData!.endpoint);
@@ -36,11 +43,21 @@ class IsolateHelper {
 
     // Register all services in the isolates memory
     ServiceLocator.configureServicesForIsolate(
-      database: database,
+      database: DriftDatabaseRepository(),
       apiClient: client,
     );
 
     // Init log manager to continue listening to log events
     LogManager.I.init();
   }
+
+  static Future<T> run<T>(FutureOr<T> Function() computation) async {
+    final helper = IsolateHelper()..preIsolateHandling();
+    final token = _rootToken;
+    return await Isolate.run(() async {
+      BackgroundIsolateBinaryMessenger.ensureInitialized(token);
+      helper.postIsolateHandling();
+      return await computation();
+    });
+  }
 }