permission check when trying to open tracking map

lib/screens/excursion/widgets/tracking.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:math';
 
 import 'package:fforte/l10n/app_localizations.dart';
+import 'package:fforte/screens/addCam/services/geolocator_service.dart';
 import 'package:fforte/screens/helper/add_entries_dialog_helper.dart';
 import 'package:fforte/screens/helper/snack_bar_helper.dart';
 import 'package:fforte/services/notification_service.dart';
@@ -59,6 +60,13 @@ class _TrackingState extends State<Tracking> {
     );
 
     super.initState();
+
+    GeolocatorService.alwaysPositionEnabled().then((value) {
+      if (!value && mounted) {
+        Navigator.of(context).pop();
+        SnackBarHelper.showSnackBarMessage(context, "${AppLocalizations.of(context)!.locationForbidden} ${AppLocalizations.of(context)!.oder} ${AppLocalizations.of(context)!.locationDisabled}");
+      }
+    });
   }
 
   @override
@@ -108,6 +116,7 @@ class _TrackingState extends State<Tracking> {
                   notificationText: "",
                 )
                 : null,
+
       ),
     ).listen((Position? position) {
       if (position != null) {