Source for file WECOptionalRegex.class.php

<?php
/**
 * @since Jul 23, 2005
 * @package polyphony.wizard.errorchecking
 * 
 * @copyright Copyright &copy; 2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License (GPL)
 *
 * @version $Id: WECOptionalRegex.class.php,v 1.3 2007/09/19 14:04:52 adamfranco Exp $
 */ 
 
require_once(POLYPHONY."/main/library/Wizard/ErrorCheckingRules/WECRegex.class.php");
/**
 * Allows for regular expression javascript error checking with optional values.
 * 
 * @since Jul 23, 2005
 * @package polyphony.wizard.errorchecking
 * 
 * @copyright Copyright &copy; 2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License (GPL)
 *
 * @version $Id: WECOptionalRegex.class.php,v 1.3 2007/09/19 14:04:52 adamfranco Exp $
 */
class WECOptionalRegex 
    extends WECRegex 
{
    
    /**
     * Returns a block of javascript code defining a function like so:
     * 
     * function(element) {
     *         return el.value.match(/\w+/);
     * }
     * @access public
     * @return string 
     */
    function generateJavaScript () {
        $re = addslashes($this->_regex);
        return "function(el) {\n" .
                "var re = new RegExp(\"$re\");\n" .
                "if (el.value == '')\n\t\t" .
                "return true;\n\t" .
                "else\n\t\t" .
                "return el.value.match(re);\n" .
                "}";
    }
    
    /**
     * Returns true if the passed {@link WizardComponent} validates against this rule.
     * @param ref object $component
     * @access public
     * @return boolean 
     */
    function checkValue ($component) {
        $value = $component->getAllValues();
        if (!strval($value) == '') 
            return true;
        else
            return parent::checkValue($component);
    }
}
 
 
?>