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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_Mobile
  * @subpackage Zend_Mobile_Push
  * @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    $Id$
  */
 
 /** Zend_Http_Client **/
 // require_once 'Zend/Http/Client.php';
 
 /** Zend_Mobile_Push_Abstract **/
 // require_once 'Zend/Mobile/Push/Abstract.php';
 
 /** Zend_Mobile_Push_Message_Gcm **/
 // require_once 'Zend/Mobile/Push/Message/Gcm.php';
 
 /** Zend_Mobile_Push_Response_Gcm **/
 // require_once 'Zend/Mobile/Push/Response/Gcm.php';
 
 /**
  * GCM Push
  *
  * @category   Zend
  * @package    Zend_Mobile
  * @subpackage Zend_Mobile_Push
  * @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_Mobile_Push_Gcm extends Zend_Mobile_Push_Abstract
 {
 
     /**
      * @const string Server URI
      */
     const SERVER_URI = 'https://android.googleapis.com/gcm/send';
 
     /**
      * Http Client
      *
      * @var Zend_Http_Client
      */
     protected $_httpClient;
 
     /**
      * API Key
      *
      * @var string
      */
     protected $_apiKey;
 
     /**
      * Get API Key
      *
      * @return string
      */
     public function getApiKey()
     {
         return $this->_apiKey;
     }
 
     /**
      * Set API Key
      *
      * @param  string $key
      * @return Zend_Mobile_Push_Gcm
      * @throws Zend_Mobile_Push_Exception
      */
     public function setApiKey($key)
     {
         if (!is_string($key) || empty($key)) {
             throw new Zend_Mobile_Push_Exception('The api key must be a string and not empty');
         }
         $this->_apiKey = $key;
         return $this;
     }
 
     /**
      * Get Http Client
      *
      * @return Zend_Http_Client
      */
     public function getHttpClient()
     {
         if (!$this->_httpClient) {
             $this->_httpClient = new Zend_Http_Client();
             $this->_httpClient->setConfig(array(
                 'strictredirects' => true,
             ));
         }
         return $this->_httpClient;
     }
 
     /**
      * Set Http Client
      *
      * @return Zend_Mobile_Push_Gcm
      */
     public function setHttpClient(Zend_Http_Client $client)
     {
         $this->_httpClient = $client;
         return $this;
     }
 
     /**
      * Send Message
      *
      * @param  Zend_Mobile_Push_Message_Abstract $message
      * @throws Zend_Http_Client_Exception
      * @throws Zend_Mobile_Push_Exception
      * @throws Zend_Mobile_Push_Exception_InvalidAuthToken
      * @throws Zend_Mobile_Push_Exception_InvalidPayload
      * @throws Zend_Mobile_Push_Exception_ServerUnavailable
      * @return Zend_Mobile_Push_Response_Gcm
      */
     public function send(Zend_Mobile_Push_Message_Abstract $message)
     {
         if (!$message->validate()) {
             throw new Zend_Mobile_Push_Exception('The message is not valid.');
         }
 
         $this->connect();
 
         $client = $this->getHttpClient();
         $client->setUri(self::SERVER_URI);
         $client->setHeaders('Authorization', 'key=' . $this->getApiKey());
 
         $response = $client->setRawData($message->toJson(), 'application/json')
                            ->request('POST');
         $this->close();
 
         switch ($response->getStatus())
         {
             case 500:
                 // require_once 'Zend/Mobile/Push/Exception/ServerUnavailable.php';
                 throw new Zend_Mobile_Push_Exception_ServerUnavailable('The server encountered an internal error, try again');
                 break;
             case 503:
                 // require_once 'Zend/Mobile/Push/Exception/ServerUnavailable.php';
                 throw new Zend_Mobile_Push_Exception_ServerUnavailable('The server was unavailable, check Retry-After header');
                 break;
             case 401:
                 // require_once 'Zend/Mobile/Push/Exception/InvalidAuthToken.php';
                 throw new Zend_Mobile_Push_Exception_InvalidAuthToken('There was an error authenticating the sender account');
                 break;
             case 400:
                 // require_once 'Zend/Mobile/Push/Exception/InvalidPayload.php';
                 throw new Zend_Mobile_Push_Exception_InvalidPayload('The request could not be parsed as JSON or contains invalid fields');
                 break;
         }
         return new Zend_Mobile_Push_Response_Gcm($response->getBody(), $message);
     }
 }