Implement proper handling for inactive/active subscriptions

flutter/lib/utils/dialogs.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 
 class UIDialogs {
+
   static Future<String?> showTextInput(BuildContext context, String title, String hintText) {
     var _textFieldController = TextEditingController();
 
@@ -26,4 +27,25 @@ class UIDialogs {
       ),
     );
   }
+
+  static Future<bool> showConfirmDialog(BuildContext context, String title, {String? text, String? okText, String? cancelText}) {
+    return showDialog<bool>(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: Text(title),
+        content: (text != null) ? Text(text) : null,
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.of(context).pop(false),
+            child: Text(cancelText ?? 'Cancel'),
+          ),
+          TextButton(
+            onPressed: () => Navigator.of(context).pop(true),
+            child: Text(okText ?? 'OK'),
+          ),
+        ],
+      ),
+    ).then((value) => value ?? false);
+  }
+
 }