TYPO3 extbase CompareFieldValidator

gistfile1.aw

<?php
/***************************************************************
*  Copyright notice
*
*  (c) 2011 Thomas Juhnke (tommy@van-tomas.de)
*  All rights reserved
*
*  This script is part of the TYPO3 project. The TYPO3 project is
*  free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  The GNU General Public License can be found at
*  http://www.gnu.org/copyleft/gpl.html.
*  A copy is found in the textfile GPL.txt and important notices to the license
*  from the author is found in LICENSE.txt distributed with these scripts.
*
*
*  This script is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*
*  This copyright notice MUST APPEAR in all copies of the script!
***************************************************************/

/**
 * Validates two input fields by comparison
 *
 * @author Thomas Juhnke <tommy@van-tomas.de>
 * @package	Tx_MyExt
 * @subpackage	ErrorChecks
 */
class Tx_MyExt_ErrorCheck_CompareField extends Tx_Formhandler_AbstractErrorCheck {

	/**
	 * Validates that items of a specified array field are of a specific type or required
	 *
	 * @return string If the check failed, the string contains the name of the failed check plus the parameters and values.
	 */
	public function check() {
		$checkFailed = '';

		$value1 = $this->gp[$this->formFieldName];
		$value2 = $this->utilityFuncs->getSingle($this->settings['params'], 'field');
		$operator = $this->utilityFuncs->getSingle($this->settings['params'], 'operator');
		$operator = trim((is_null($operator) ? '==' : $operator, '\'" ');

		if ($value2) {
			$valid = false;
			switch ($operator) {
				case '>':
					$valid = $value1 >	$value2;
					break;
				case '>=':
					$valid = $value1 >= $value2;
					break;
				case '==':
					$valid = $value1 == $value2;
					break;
				case '<=':
					$valid = $value1 <= $value2;
					break;
				case '<':
					$valid = $value1 <	$value2;
					break;
				default:
					throw new Exception(sprintf('Invalid comparison operator "%s"', $operator));
					break;
			}
			if (!$valid) {
				$checkFailed = $this->getCheckFailed();
			}
		}

		// sprintf('The value of field "%s" could not be fetched', $value2);

		return $checkFailed;
	}
}
?>