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mobile/lib/routing/auth_guard.dart

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+import 'dart:convert';
+
+import 'package:auto_route/auto_route.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:immich_mobile/shared/services/network.service.dart';
+
+class AuthGuard extends AutoRouteGuard {
+  final NetworkService _networkService = NetworkService();
+
+  @override
+  void onNavigation(NavigationResolver resolver, StackRouter router) async {
+    try {
+      var res = await _networkService.postRequest(url: 'auth/validateToken');
+      var jsonReponse = jsonDecode(res.toString());
+      if (jsonReponse['authStatus']) {
+        resolver.next(true);
+      }
+    } catch (e) {
+      router.removeUntil((route) => route.name == "LoginRoute");
+    }
+  }
+}