From f104171f2fa56f0d18ad45bfe9bd5742c9a93a28 Mon Sep 17 00:00:00 2001
From: Matthias Schmidt <gravatronics@live.com>
Date: Sat, 27 Jun 2020 18:22:46 +0200
Subject: [PATCH] Fix validation of url form field value

Close #3390
---
 .../lib/system/form/builder/field/UrlFormField.class.php     | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/wcfsetup/install/files/lib/system/form/builder/field/UrlFormField.class.php b/wcfsetup/install/files/lib/system/form/builder/field/UrlFormField.class.php
index cf94b020b0..7f56e0b0fc 100644
--- a/wcfsetup/install/files/lib/system/form/builder/field/UrlFormField.class.php
+++ b/wcfsetup/install/files/lib/system/form/builder/field/UrlFormField.class.php
@@ -8,7 +8,7 @@ use wcf\util\Url;
  * Implementation of a form field to enter a url.
  * 
  * @author	Matthias Schmidt
- * @copyright	2001-2019 WoltLab GmbH
+ * @copyright	2001-2020 WoltLab GmbH
  * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @package	WoltLabSuite\Core\System\Form\Builder\Field
  * @since	5.2
@@ -19,6 +19,9 @@ class UrlFormField extends TextFormField {
 	 */
 	protected function validateText($text, Language $language = null) {
 		if ($this->isRequired() && ($this->getValue() === null || $this->getValue() === '')) {
+			$this->addValidationError(new FormFieldValidationError('empty'));
+		}
+		else if ($this->getValue() !== null && $this->getValue() !== '') {
 			if (!Url::is($text)) {
 				$this->addValidationError(new FormFieldValidationError(
 					'invalid',
-- 
2.20.1