From: Matthias Schmidt <gravatronics@live.com>
Date: Sun, 10 Jun 2018 08:46:57 +0000 (+0200)
Subject: Add FormFieldValidatorUtil
X-Git-Tag: 5.2.0_Alpha_1~680^2~33
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5ce29ee74058d770e7f30b4eb7bab077d34a028b;p=GitHub%2FWoltLab%2FWCF.git

Add FormFieldValidatorUtil

See #2545
---

diff --git a/wcfsetup/install/files/lib/system/form/builder/field/validation/FormFieldValidatorUtil.class.php b/wcfsetup/install/files/lib/system/form/builder/field/validation/FormFieldValidatorUtil.class.php
new file mode 100644
index 0000000000..82a1d92284
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/form/builder/field/validation/FormFieldValidatorUtil.class.php
@@ -0,0 +1,53 @@
+<?php
+namespace wcf\system\form\builder\field\validation;
+use wcf\system\form\builder\field\IFormField;
+use wcf\system\Regex;
+
+/**
+ * Contains form field validator-related functions.
+ * 
+ * @author	Matthias Schmidt
+ * @copyright	2001-2018 WoltLab GmbH
+ * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @package	WoltLabSuite\Core\System\Form\Builder\Field\Validation
+ * @since	3.2
+ */
+abstract class FormFieldValidatorUtil {
+	/**
+	 * Returns a form field validator to check the form field value against
+	 * the given regular expression.
+	 * 
+	 * @param	string		$regularExpression	regular expression used to validate form field value
+	 * @param	string		$languageItemPrefix	language item prefix used for error language item `{$languageItemPrefix}.error.format`
+	 * @return	IFormFieldValidator
+	 * 
+	 * @throws	\InvalidArgumentException		if regular expression is invalid
+	 */
+	public static function getRegularExpressionValidator(string $regularExpression, string $languageItemPrefix): IFormFieldValidator {
+		$regex = Regex::compile($regularExpression);
+		if (!$regex->isValid()) {
+			throw new \InvalidArgumentException("Invalid regular expression '{$regularExpression}' given.");
+		}
+		
+		return new FormFieldValidator(
+			'format',
+			function(IFormField $formField) use ($regex, $languageItemPrefix) {
+				if (!$regex->match($formField->getSaveValue())) {
+					$formField->addValidationError(
+						new FormFieldValidationError(
+							'format',
+							$languageItemPrefix . '.error.format'
+						)
+					);
+				}
+			}
+		);
+	}
+	
+	/**
+	 * Disallow creating `FormFieldValidatorUtil` objects.
+	 */
+	private function __construct() {
+		// does nothing
+	}
+}