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<?php
/**
* TReCaptcha2Validator class file
*
* @author Cristian Camilo Naranjo Valencia
* @link http://icolectiva.co
* @copyright Copyright © 2005-2016 The PRADO Group
* @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
* @package System.Web.UI.WebControls
*/
Prado::using('System.Web.UI.WebControls.TBaseValidator');
Prado::using('System.Web.UI.WebControls.TReCaptcha2');
/**
* TReCaptcha2Validator class
*
* TReCaptcha2Validator validates a reCAPTCHA represented by a {@link TReCaptcha} control.
* The input control fails validation if th user did not pass the humanity test.
*
* To use TReCaptcha2Validator, specify the {@link setCaptchaControl CaptchaControl}
* to be the ID path of the {@link TReCaptcha} control.
*
* @author Cristian Camilo Naranjo Valencia
* @package System.Web.UI.WebControls
* @since 3.3.1
*/
class TReCaptcha2Validator extends TBaseValidator
{
protected $_isvalid = null;
protected function getClientClassName()
{
return 'Prado.WebUI.TReCaptcha2Validator';
}
public function getEnableClientScript()
{
return true;
}
protected function getCaptchaControl()
{
$control = $this->getValidationTarget();
if (!$control)
throw new Exception('No target control specified for TReCaptcha2Validator');
if (!($control instanceof TReCaptcha2))
throw new Exception('TReCaptcha2Validator only works with TReCaptcha2 controls');
return $control;
}
public function getClientScriptOptions()
{
$options = parent::getClientScriptOptions();
$options['ResponseFieldName'] = $this->getCaptchaControl()->getResponseFieldName();
return $options;
}
/**
* This method overrides the parent's implementation.
* The validation succeeds if the input control has the same value
* as the one displayed in the corresponding RECAPTCHA control.
*
* @return boolean whether the validation succeeds
*/
protected function evaluateIsValid()
{
// check validity only once (if trying to evaulate multiple times, all redundant checks would fail)
if (is_null($this->_isvalid))
{
$control = $this->getCaptchaControl();
$this->_isvalid = $control->validate();
}
return ($this->_isvalid==true);
}
public function onPreRender($param)
{
parent::onPreRender($param);
$cs = $this->Page->getClientScript();
$cs->registerPradoScript('validator');
// communicate validation status to the client side
$value = $this->_isvalid===false ? '0' : '1';
$cs->registerHiddenField($this->getClientID().'_1',$value);
// update validator display
if ($control = $this->getValidationTarget())
{
$fn = 'captchaUpdateValidatorStatus_'.$this->getClientID();
$cs->registerEndScript($this->getClientID().'::validate', implode(' ',array(
// this function will be used to update the validator
'function '.$fn.'(valid)',
'{',
' jQuery('.TJavaScript::quoteString('#'.$this->getClientID().'_1').').val(valid);',
' Prado.Validation.validateControl('.TJavaScript::quoteString($control->ClientID).'); ',
'}',
'',
// update the validator to the result if we're in a callback
// (if we're in initial rendering or a postback then the result will be rendered directly to the page html anyway)
$this->Page->IsCallback ? $fn.'('.$value.');' : '',
'',
// install event handler that clears the validation error when user changes the captcha response field
'jQuery("#'.$control->getClientID().'").on("change", '.TJavaScript::quoteString('#'.$control->getResponseFieldName()).', function() { ',
$fn.'("1");',
'});',
)));
}
}
}
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