menambahkan kondisi no hp

lib/screen/contact_us/contact_us2.dart

@@ -18,6 +18,9 @@ class ContactUs2 extends StatelessWidget {
   final emailController = TextEditingController();
   final messageController = TextEditingController();
 
+  String pattern =
+      r'(\+62|62|0)(\d{2,3})?\)?[ .-]?\d{2,4}[ .-]?\d{2,4}[ .-]?\d{2,4}';
+
   @override
   Widget build(BuildContext context) {
     var screenSize = MediaQuery.of(context).size;
@@ -186,6 +189,8 @@ class ContactUs2 extends StatelessWidget {
                           validator: (value) {
                             if (value == null || value.isEmpty) {
                               return 'Please enter your phone number';
+                            } else if (!RegExp(pattern).hasMatch(value)) {
+                              return 'Start with 628 or 08';
                             }
                             return null;
                           },