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<?php
/**
* TReCaptchaValidator class file
*
* @author Bérczi Gábor <gabor.berczi@devworx.hu>
* @link http://www.devworx.hu/
* @copyright Copyright © 2011 DevWorx
* @license http://www.pradosoft.com/license/
* @package System.Web.UI.WebControls
*/
Prado::using('System.Web.UI.WebControls.TBaseValidator');
Prado::using('System.Web.UI.WebControls.TReCaptcha');
/**
* TReCaptchaValidator class
*
* TReCaptchaValidator validates user input against a reCAPTCHA represented by
* a {@link TReCaptcha} control. The input control fails validation if its value
* is not the same as the token displayed in reCAPTCHA. Note, if the user does
* not enter any thing, it is still considered as failing the validation.
*
* To use TReCaptchaValidator, specify the {@link setControlToValidate ControlToValidate}
* to be the ID path of the {@link TReCaptcha} control.
*
* @author Bérczi Gábor <gabor.berczi@devworx.hu>
* @package System.Web.UI.WebControls
* @since 3.2
*/
class TReCaptchaValidator extends TBaseValidator
{
protected $_isvalid = null;
/**
* Gets the name of the javascript class responsible for performing validation for this control.
* This method overrides the parent implementation.
* @return string the javascript class name
*/
protected function getClientClassName()
{
return '';
}
public function getEnableClientScript()
{
return false;
}
/**
* This method overrides the parent's implementation.
* The validation succeeds if the input control has the same value
* as the one displayed in the corresponding RECAPTCHA control.
*
* @return boolean whether the validation succeeds
*/
protected function evaluateIsValid()
{
// check validity only once (if trying to evaluate multiple times, all redundant checks would fail)
if (is_null($this->_isvalid))
{
$control = $this->getValidationTarget();
if(!($control instanceof TCaptcha))
throw new TConfigurationException('recaptchavalidator_captchacontrol_invalid');
$this->_isvalid = $control->validate();
}
return ($this->_isvalid==true);
}
}
?>
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