Ask camera permission if not granted in Scanner Dialog

lib/Components/ScannerDialog.dart

@@ -8,6 +8,7 @@ import 'package:mymuseum_visitapp/Screens/Article/article_page.dart';
 import 'package:mymuseum_visitapp/Screens/Quizz/quizz_page.dart';
 import 'package:mymuseum_visitapp/app_context.dart';
 import 'package:mymuseum_visitapp/constants.dart';
+import 'package:permission_handler/permission_handler.dart';
 import 'package:qr_code_scanner/qr_code_scanner.dart';
 
 
@@ -25,6 +26,22 @@ class _ScannerDialogState extends State<ScannerDialog> {
   QRViewController? controller;
   final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
 
+  @override
+  Future<void> initState() async {
+    super.initState();
+
+    var status = await Permission.camera.status;
+
+    if(!status.isGranted) {
+      // You can request multiple permissions at once.
+      Map<Permission, PermissionStatus> statuses = await [
+        Permission.camera,
+      ].request();
+      print(statuses[Permission.camera]);
+      print(status);
+    }
+  }
+
   // In order to get hot reload to work we need to pause the camera if the platform
   // is android, or resume the camera if the platform is iOS.
   @override
@@ -183,12 +200,24 @@ class _ScannerDialogState extends State<ScannerDialog> {
     });
   }
 
-  void _onPermissionSet(BuildContext context, QRViewController ctrl, bool p) {
+  Future<void> _onPermissionSet(BuildContext context, QRViewController ctrl, bool p) async {
     //log('${DateTime.now().toIso8601String()}_onPermissionSet $p');
     if (!p) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(content: Text('no Permission')),
-      );
+
+      var status = await Permission.camera.status;
+
+      if(!status.isGranted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(content: Text('no Permission')),
+        );
+
+        // You can request multiple permissions at once.
+        Map<Permission, PermissionStatus> statuses = await [
+          Permission.camera,
+        ].request();
+        print(statuses[Permission.camera]);
+        print(status);
+      }
     }
   }
 

lib/constants.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
 
-// Colors - TO FILL WIT CORRECT COLOR
+// Colors - TO FILL WITH CORRECT COLOR
 const kBackgroundColor = Color(0xFFFFFFFF);
 const kMainColor = Color(0xFF306bac);
 const kSecondColor = Color(0xFF309cb0);