Show server version message on app start

lib/config/globals.dart

@@ -1,3 +1,4 @@
 import 'package:flutter/material.dart';
 
 final GlobalKey<ScaffoldMessengerState> scaffoldMessengerKey = GlobalKey<ScaffoldMessengerState>();
+final GlobalKey<NavigatorState> globalNavigatorKey = GlobalKey<NavigatorState>();

lib/main.dart

@@ -235,13 +235,16 @@ class _MainState extends State<Main> {
           Locale('tr', '')
         ],
         scaffoldMessengerKey: scaffoldMessengerKey,
+        navigatorKey: globalNavigatorKey,
         builder: (context, child) {
           return CustomMenuBar(
             child: MediaQuery(
               data: MediaQuery.of(context).copyWith(
-                textScaleFactor: !(Platform.isAndroid || Platform.isIOS) 
+                textScaler: TextScaler.linear(
+                  !(Platform.isAndroid || Platform.isIOS) 
                     ? 0.9
                     : 1.0
+                )
               ),
               child: child!,
             ),
@@ -252,4 +255,3 @@ class _MainState extends State<Main> {
     );
   }
 }
-

lib/providers/servers_provider.dart

@@ -60,7 +60,7 @@ class ServersProvider with ChangeNotifier {
     notifyListeners();
   }
 
-  void setSelectedServer(Server server) {
+  void setSelectedServer(Server? server) {
     _selectedServer = server;
     notifyListeners();
   }

lib/providers/status_provider.dart

@@ -2,6 +2,11 @@ import 'dart:async';
 
 import 'package:flutter/material.dart';
 
+import 'package:adguard_home_manager/widgets/add_server/unsupported_version_modal.dart';
+
+import 'package:adguard_home_manager/config/globals.dart';
+import 'package:adguard_home_manager/config/minimum_server_version.dart';
+import 'package:adguard_home_manager/functions/compare_versions.dart';
 import 'package:adguard_home_manager/models/server_status.dart';
 import 'package:adguard_home_manager/models/filtering_status.dart';
 import 'package:adguard_home_manager/constants/enums.dart';
@@ -240,11 +245,31 @@ class StatusProvider with ChangeNotifier {
 
     final result = await _serversProvider!.apiClient2!.getServerStatus();
     if (result.successful == true) {
+      final status = result.content as ServerStatus;
       setServerStatusData(
-        data: result.content as ServerStatus
+        data: status
       );
       _loadStatus = LoadStatus.loaded; 
       notifyListeners();
+
+      // Check server version and launch modal if not valid
+      final validVersion = serverVersionIsAhead(
+        currentVersion: status.serverVersion, 
+        referenceVersion: MinimumServerVersion.stable,
+        referenceVersionBeta: MinimumServerVersion.beta
+      );
+      if (validVersion == false) {
+        showDialog(
+          context: globalNavigatorKey.currentContext!, 
+          builder: (ctx) => UnsupportedVersionModal(
+            serverVersion: status.serverVersion, 
+            onClose: () {
+              _serversProvider!.setSelectedServer(null);
+            }
+          )
+        );
+      }
+
       return true;
     }
     else {

lib/widgets/layout.dart

@@ -15,8 +15,8 @@ import 'package:adguard_home_manager/providers/servers_provider.dart';
 
 class Layout extends StatefulWidget {
   const Layout({
-    Key? key, 
-  }) : super(key: key);
+    super.key, 
+  });
 
   @override
   State<Layout> createState() => _LayoutState();