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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Captcha
  * @subpackage Adapter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 
 /** @see Zend_Captcha_Base */
 // require_once 'Zend/Captcha/Base.php';
 
 /** @see Zend_Service_ReCaptcha */
 // require_once 'Zend/Service/ReCaptcha.php';
 
 /**
  * ReCaptcha adapter
  *
  * Allows to insert captchas driven by ReCaptcha service
  *
  * @see http://recaptcha.net/apidocs/captcha/
  *
  * @category   Zend
  * @package    Zend_Captcha
  * @subpackage Adapter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 class Zend_Captcha_ReCaptcha extends Zend_Captcha_Base
 {
     /**@+
      * ReCaptcha Field names
      * @var string
      */
     protected $_CHALLENGE = 'recaptcha_challenge_field';
     protected $_RESPONSE  = 'recaptcha_response_field';
     /**@-*/
 
     /**
      * Recaptcha service object
      *
      * @var Zend_Service_Recaptcha
      */
     protected $_service;
 
     /**
      * Parameters defined by the service
      *
      * @var array
      */
     protected $_serviceParams = array();
 
     /**
      * Options defined by the service
      *
      * @var array
      */
     protected $_serviceOptions = array();
 
     /**#@+
      * Error codes
      */
     const MISSING_VALUE = 'missingValue';
     const ERR_CAPTCHA   = 'errCaptcha';
     const BAD_CAPTCHA   = 'badCaptcha';
     /**#@-*/
 
     /**
      * Error messages
      * @var array
      */
     protected $_messageTemplates = array(
         self::MISSING_VALUE => 'Missing captcha fields',
         self::ERR_CAPTCHA   => 'Failed to validate captcha',
         self::BAD_CAPTCHA   => 'Captcha value is wrong: %value%',
     );
 
     /**
      * Retrieve ReCaptcha Private key
      *
      * @return string
      */
     public function getPrivkey()
     {
         return $this->getService()->getPrivateKey();
     }
 
     /**
      * Retrieve ReCaptcha Public key
      *
      * @return string
      */
     public function getPubkey()
     {
         return $this->getService()->getPublicKey();
     }
 
     /**
      * Set ReCaptcha Private key
      *
      * @param string $privkey
      * @return Zend_Captcha_ReCaptcha
      */
     public function setPrivkey($privkey)
     {
         $this->getService()->setPrivateKey($privkey);
         return $this;
     }
 
     /**
      * Set ReCaptcha public key
      *
      * @param string $pubkey
      * @return Zend_Captcha_ReCaptcha
      */
     public function setPubkey($pubkey)
     {
         $this->getService()->setPublicKey($pubkey);
         return $this;
     }
 
     /**
      * Constructor
      *
      * @param array|Zend_Config $options
      */
     public function __construct($options = null)
     {
         $this->setService(new Zend_Service_ReCaptcha());
         $this->_serviceParams = $this->getService()->getParams();
         $this->_serviceOptions = $this->getService()->getOptions();
 
         parent::__construct($options);
 
         if ($options instanceof Zend_Config) {
             $options = $options->toArray();
         }
         if (!empty($options)) {
             $this->setOptions($options);
         }
     }
 
     /**
      * Set service object
      *
      * @param  Zend_Service_ReCaptcha $service
      * @return Zend_Captcha_ReCaptcha
      */
     public function setService(Zend_Service_ReCaptcha $service)
     {
         $this->_service = $service;
         return $this;
     }
 
     /**
      * Retrieve ReCaptcha service object
      *
      * @return Zend_Service_ReCaptcha
      */
     public function getService()
     {
         return $this->_service;
     }
 
     /**
      * Set option
      *
      * If option is a service parameter, proxies to the service. The same
      * goes for any service options (distinct from service params)
      *
      * @param  string $key
      * @param  mixed $value
      * @return Zend_Captcha_ReCaptcha
      */
     public function setOption($key, $value)
     {
         $service = $this->getService();
         if (isset($this->_serviceParams[$key])) {
             $service->setParam($key, $value);
             return $this;
         }
         if (isset($this->_serviceOptions[$key])) {
             $service->setOption($key, $value);
             return $this;
         }
         return parent::setOption($key, $value);
     }
 
     /**
      * Generate captcha
      *
      * @see Zend_Form_Captcha_Adapter::generate()
      * @return string
      */
     public function generate()
     {
         return "";
     }
 
     /**
      * Validate captcha
      *
      * @see    Zend_Validate_Interface::isValid()
      * @param  mixed      $value
      * @param  array|null $context
      * @return boolean
      */
     public function isValid($value, $context = null)
     {
         if (!is_array($value) && !is_array($context)) {
             $this->_error(self::MISSING_VALUE);
             return false;
         }
 
         if (!is_array($value) && is_array($context)) {
             $value = $context;
         }
 
         if (empty($value[$this->_CHALLENGE]) || empty($value[$this->_RESPONSE])) {
             $this->_error(self::MISSING_VALUE);
             return false;
         }
 
         $service = $this->getService();
 
         $res = $service->verify($value[$this->_CHALLENGE], $value[$this->_RESPONSE]);
 
         if (!$res) {
             $this->_error(self::ERR_CAPTCHA);
             return false;
         }
 
         if (!$res->isValid()) {
             $this->_error(self::BAD_CAPTCHA, $res->getErrorCode());
             $service->setParam('error', $res->getErrorCode());
             return false;
         }
 
         return true;
     }
 
     /**
      * Render captcha
      *
      * @param  Zend_View_Interface $view
      * @param  mixed $element
      * @return string
      */
     public function render(Zend_View_Interface $view = null, $element = null)
     {
         $name = null;
         if ($element instanceof Zend_Form_Element) {
             $name = $element->getBelongsTo();
         }
         return $this->getService()->getHTML($name);
     }
 
     /**
      * Get captcha decorator
      *
      * @return string
      */
     public function getDecorator()
     {
         return "Captcha_ReCaptcha";
     }
 }