<?php
/**
 * patForms Rule Captcha
 *
 * $Id$
 *
 * @package	Wombat
 * @subpackage patForms
 * @author gERD Schaufelberger <gerd@php-tools.net>
 */

WBClass::load('WBPAT_Forms_Rule');

/**
 * patForms Rule Captcha
 *
 * Check value against current user's password
 *
 * @version 0.1.0
 * @package	Wombat
 * @subpackage patForms
 */
class patForms_Rule_Captcha extends patForms_Rule
{
   /**
    * Initialize validation codes using gettext
    *
    * @access protected
    * @return bool $success Always returns true.
    * @see $attributeDefaults
    */
    function loadValidatiorErrorCodes()
    {
        $this->validatorErrorCodes  = array(
            1   =>   patI18n::dgettext('wombat', 'The entered value doesn\'t match requested characters.'),
        );
        return true;
    }

   /**
	* method called by patForms or any patForms_Element to validate the
	* element or the form.
	*
	* @param patForms_Element $form object
	* @return bool true on sucess
	*/
	public function applyRule(&$element, $type = PATFORMS_RULE_AFTER_VALIDATION)
	{
        $guess  =   $element->getValue();
        if (empty($guess)) {
            $this->addValidationError(1);
            return false;   
        }

        $sess   =   WBClass::create('patSession');
        $ch     =   $sess->get('wb.service.captcha.txt');
        $sess->clear('wb.service.captcha.txt');
        
        if ($ch != $guess) {
            $this->addValidationError(1);
            return false;
        }
        return true;
	}
}
?>