fixed phone validation desktop

desktop/src/main/java/org/example/petshopdesktop/Validator.java

@@ -183,7 +183,7 @@ public class Validator {
     }
 
     /**
-     * Checks if the input is a valid phone number in format XXX-XXX-XXXX
+     * Checks if the input is a valid phone number in format (XXX) XXX-XXXX
      * @param value input of string
      * @param name name of input
      * @return error msg if input is not in valid phone format, otherwise empty
@@ -191,14 +191,14 @@ public class Validator {
     public static String isValidPhoneNumber(String value, String name){
         String msg = "";
         if (value == null) {
-            msg += name + " must be in format XXX-XXX-XXXX. \n";
+            msg += name + " must be in format (XXX) XXX-XXXX. \n";
 
             return msg;
         }
-        String regex = "^\\d{3}-\\d{3}-\\d{4}$";
+        String regex = "^\\(\\d{3}\\) \\d{3}-\\d{4}$";
 
         if (!value.matches(regex)){
-            msg += name + " must be in format XXX-XXX-XXXX. \n";
+            msg += name + " must be in format (XXX) XXX-XXXX. \n";
         }
 
         return msg;

desktop/src/main/java/org/example/petshopdesktop/controllers/dialogcontrollers/StaffEditDialogController.java

@@ -15,6 +15,7 @@ import org.example.petshopdesktop.api.endpoints.UserApi;
 import org.example.petshopdesktop.api.endpoints.CustomerApi;
 import org.example.petshopdesktop.auth.UserSession;
 import org.example.petshopdesktop.util.ActivityLogger;
+import org.example.petshopdesktop.util.TextFieldFormatSupport;
 
 public class StaffEditDialogController {
 
@@ -47,6 +48,11 @@ public class StaffEditDialogController {
 
     private UserResponse user;
 
+    @FXML
+    void initialize() {
+        TextFieldFormatSupport.applyPhoneNumberFormat(txtPhone);
+    }
+
     public void setUser(UserResponse user) {
         this.user = user;
         String fullName = user.getFullName() == null ? "" : user.getFullName();

desktop/src/main/java/org/example/petshopdesktop/controllers/dialogcontrollers/StaffRegisterDialogController.java

@@ -15,6 +15,7 @@ import org.example.petshopdesktop.api.endpoints.CustomerApi;
 import org.example.petshopdesktop.auth.UserSession;
 import org.example.petshopdesktop.Validator;
 import org.example.petshopdesktop.util.ActivityLogger;
+import org.example.petshopdesktop.util.TextFieldFormatSupport;
 
 public class StaffRegisterDialogController {
 
@@ -45,6 +46,11 @@ public class StaffRegisterDialogController {
     @FXML
     private Button btnCreate;
 
+    @FXML
+    void initialize() {
+        TextFieldFormatSupport.applyPhoneNumberFormat(txtPhone);
+    }
+
     @FXML
     void btnCreateClicked(ActionEvent event) {
         lblError.setText("");

desktop/src/main/java/org/example/petshopdesktop/controllers/dialogcontrollers/SupplierDialogController.java

@@ -15,6 +15,7 @@ import org.example.petshopdesktop.api.dto.supplier.SupplierResponse;
 import org.example.petshopdesktop.api.endpoints.SupplierApi;
 import org.example.petshopdesktop.models.Supplier;
 import org.example.petshopdesktop.util.ActivityLogger;
+import org.example.petshopdesktop.util.TextFieldFormatSupport;
 
 public class SupplierDialogController {
 
@@ -52,6 +53,8 @@ public class SupplierDialogController {
      */
     @FXML
     void initialize() {
+        TextFieldFormatSupport.applyPhoneNumberFormat(txtPhone);
+
         //Set up mouse handlers for buttons
         btnSave.setOnMouseClicked(new EventHandler<MouseEvent>() {
             @Override

desktop/src/main/java/org/example/petshopdesktop/util/TextFieldFormatSupport.java

@@ -0,0 +1,55 @@
+package org.example.petshopdesktop.util;
+
+import javafx.application.Platform;
+import javafx.scene.control.TextField;
+import javafx.scene.control.TextFormatter;
+
+import java.util.function.UnaryOperator;
+
+public class TextFieldFormatSupport {
+
+    /**
+     * Applies a phone number formatter to a TextField.
+     * The formatter only allows digits and automatically formats the input as (XXX) XXX-XXXX.
+     *
+     * @param textField The TextField to apply the formatter to.
+     */
+    public static void applyPhoneNumberFormat(TextField textField) {
+        textField.textProperty().addListener((observable, oldValue, newValue) -> {
+            if (newValue == null) return;
+
+            // Remove all non-digit characters
+            String digits = newValue.replaceAll("\\D", "");
+
+            // Limit to 10 digits
+            if (digits.length() > 10) {
+                digits = digits.substring(0, 10);
+            }
+
+            StringBuilder formatted = new StringBuilder();
+            int len = digits.length();
+
+            if (len > 0) {
+                formatted.append("(");
+                if (len <= 3) {
+                    formatted.append(digits);
+                } else {
+                    formatted.append(digits, 0, 3).append(") ");
+                    if (len <= 6) {
+                        formatted.append(digits.substring(3));
+                    } else {
+                        formatted.append(digits, 3, 6).append("-").append(digits.substring(6));
+                    }
+                }
+            }
+
+            String result = formatted.toString();
+            if (!result.equals(newValue)) {
+                Platform.runLater(() -> {
+                    textField.setText(result);
+                    textField.positionCaret(result.length());
+                });
+            }
+        });
+    }
+}