error wenn no econtrol API

lib/controller/gasstations_controller.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'package:get/get.dart';
 import '../models/econtrol_model.dart';
 import '../services/geolocation_service.dart';
@@ -6,6 +7,7 @@ import '../services/econtrol_service.dart';
 class GasstationsController extends GetxController {
   final isLoading = false.obs;
   final isLoadingLocation = false.obs;
+  final errorMessage = ''.obs;
   final eControlData = <EControlModel>[].obs;
 
   @override
@@ -22,51 +24,76 @@ class GasstationsController extends GetxController {
 
   Future<void> _loadStationInfosList() async {
     isLoading.value = true;
-    var geolocationService = GeolocationService();
-    var eControlService = EControlService();
+    errorMessage.value = '';
 
-    await geolocationService.getCurrentLocation();
-    if (geolocationService.hasLocation) {
-      // Parallel Diesel und Benzin laden
-      final fuelData = await eControlService.getBothFuelData(
-        geolocationService.latitude,
-        geolocationService.longitude,
-      );
+    try {
+      var geolocationService = GeolocationService();
+      var eControlService = EControlService();
 
-      List<EControlModel> dieselStations = (fuelData['DIE'] as List)
-          .map((json) => EControlModel.fromJson(json))
-          .toList();
+      // Standort-Abfrage mit Timeout versehen (z. B. 8 Sekunden),
+      // falls der Browser/User bei der Rechtefreigabe blockiert oder hängt
+      await geolocationService
+          .getCurrentLocation()
+          .timeout(
+            const Duration(seconds: 8),
+            onTimeout: () {
+              throw TimeoutException('Standortabfrage hat zu lange gedauert.');
+            },
+          );
 
-      List<EControlModel> supStations = (fuelData['SUP'] as List)
-          .map((json) => EControlModel.fromJson(json))
-          .toList();
+      if (geolocationService.hasLocation) {
+        final fuelData = await eControlService.getBothFuelData(
+          geolocationService.latitude,
+          geolocationService.longitude,
+        );
 
-      // Map zur Zusammenführung nach Tankstellen-ID
-      Map<int, EControlModel> combinedMap = {};
+        List<EControlModel> dieselStations = (fuelData['DIE'] as List)
+            .map((json) => EControlModel.fromJson(json))
+            .toList();
 
-      for (var station in dieselStations) {
-        if (station.id != null) {
-          combinedMap[station.id!] = station;
-        }
-      }
+        List<EControlModel> supStations = (fuelData['SUP'] as List)
+            .map((json) => EControlModel.fromJson(json))
+            .toList();
 
-      // Benzin-Preise in dieselben Tankstellen-Objekte mergen
-      for (var supStation in supStations) {
-        if (supStation.id != null) {
-          if (combinedMap.containsKey(supStation.id)) {
-            // Falls Tankstelle schon existiert, füge Benzin-Preis hinzu
-            final existingPrices = combinedMap[supStation.id!]!.prices ?? [];
-            final supPrices = supStation.prices ?? [];
-            combinedMap[supStation.id!]!.prices = [...existingPrices, ...supPrices];
-          } else {
-            combinedMap[supStation.id!] = supStation;
+        Map<int, EControlModel> combinedMap = {};
+
+        for (var station in dieselStations) {
+          if (station.id != null) {
+            combinedMap[station.id!] = station;
           }
         }
-      }
 
-      eControlData.value = combinedMap.values.toList();
+        for (var supStation in supStations) {
+          if (supStation.id != null) {
+            if (combinedMap.containsKey(supStation.id)) {
+              final existingPrices = combinedMap[supStation.id!]!.prices ?? [];
+              final supPrices = supStation.prices ?? [];
+              combinedMap[supStation.id!]!.prices = [...existingPrices, ...supPrices];
+            } else {
+              combinedMap[supStation.id!] = supStation;
+            }
+          }
+        }
+
+        eControlData.value = combinedMap.values.toList();
+      } else {
+        errorMessage.value =
+            'Standort konnte nicht ermittelt werden. Bitte prüfen Sie Ihre Browser-Freigabe.';
+      }
+    } on TimeoutException {
+      errorMessage.value =
+          'Standortabfrage zeitlich überschritten. Bitte erlauben Sie den Standortzugriff im Browser.';
+    } catch (e) {
+      errorMessage.value =
+          'Fehler beim Laden der Daten: ${e.toString()}';
+    } finally {
+      // Stellt sicher, dass das Lade-Icon auf jeden Fall verschwindet
+      isLoading.value = false;
+      update();
     }
-    isLoading.value = false;
-    update();
+  }
+
+  void retry() {
+    _loadStationInfosList();
   }
 }