Blood Donation error handling

lib/pages/Blood/blood_donation_book_appointment.dart

@@ -13,6 +13,7 @@ import 'package:diplomaticquarterapp/uitl/translations_delegate_base.dart';
 import 'package:diplomaticquarterapp/uitl/utils_new.dart';
 import 'package:diplomaticquarterapp/widgets/buttons/custom_text_button.dart';
 import 'package:diplomaticquarterapp/widgets/buttons/defaultButton.dart';
+import 'package:diplomaticquarterapp/widgets/dialogs/confirm_dialog.dart';
 import 'package:diplomaticquarterapp/widgets/dialogs/radio_selection_dialog.dart';
 import 'package:diplomaticquarterapp/widgets/others/app_scaffold_widget.dart';
 import 'package:flutter/material.dart';
@@ -208,12 +209,33 @@ class _BloodDonationBookAppointmentState extends State<BloodDonationBookAppointm
       if (res['MessageStatus'] == 1) {
         AppToast.showSuccessToast(message: TranslationBase.of(context).bookedSuccess);
         Navigator.of(context).pop();
-        Future.delayed(new Duration(milliseconds: 500), () {
-          // getToDoCount();
-        });
       } else {
-        AppToast.showErrorToast(message: res['ErrorEndUserMessage']);
+        ConfirmDialog dialog = new ConfirmDialog(
+            context: context,
+            confirmMessage: res['ErrorEndUserMessage'],
+            okText: TranslationBase.of(context).ok,
+            cancelText: TranslationBase.of(context).cancel_nocaps,
+            okFunction: () async {
+              // openAppSettings();
+              Navigator.pop(context);
+            },
+            cancelFunction: () => {});
+        dialog.showAlertDialog(context);
+        // AppToast.showErrorToast(message: res['ErrorEndUserMessage']);
       }
+    }).catchError((err) {
+      GifLoaderDialogUtils.hideDialog(context);
+      ConfirmDialog dialog = new ConfirmDialog(
+          context: context,
+          confirmMessage: err,
+          okText: TranslationBase.of(context).ok,
+          cancelText: TranslationBase.of(context).cancel_nocaps,
+          okFunction: () async {
+            // openAppSettings();
+            Navigator.pop(context);
+          },
+          cancelFunction: () => {});
+      dialog.showAlertDialog(context);
     });
   }