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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_Service_ShortUrl
  * @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    $Id$
  */
 
 /**
  * @see Zend_Service_ShortUrl_AbstractShortener
  */
 // require_once 'Zend/Service/ShortUrl/AbstractShortener.php';
 
 /**
  * Bit.ly API implementation
  *
  * @category   Zend
  * @package    Zend_Service_ShortUrl
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Service_ShortUrl_BitLy extends Zend_Service_ShortUrl_AbstractShortener
 {
 
     /**
      * Base URI of the service
      *
      * @var string
      */
     protected $_apiUri = 'http://api.bitly.com';
 
     /**
      * user login name
      *
      * @var string
      */
     protected $_loginName;
 
     /**
      * user API key or application access token
      *
      * @var string
      */
     protected $_apiKey;
 
     /**
      * @param string $login user login name or application access token
      * @param null|string $apiKey user API key
      */
     public function __construct($login, $apiKey = null)
     {
         if(null === $apiKey) {
             $this->setOAuthAccessToken($login);
         } else {
             $this->setApiLogin($login, $apiKey);
         }
     }
 
     /**
      * set OAuth credentials
      *
      * @param $accessToken
      * @return Zend_Service_ShortUrl_BitLy
      */
     public function setOAuthAccessToken($accessToken)
     {
         $this->_apiKey = $accessToken;
         $this->_loginName = null;
         return $this;
     }
 
     /**
      * set login credentials
      *
      * @param $login
      * @param $apiKey
      * @return Zend_Service_ShortUrl_BitLy
      */
     public function setApiLogin($login, $apiKey)
     {
         $this->_apiKey = $apiKey;
         $this->_loginName = $login;
         return $this;
     }
 
     /**
      * prepare http client
      * @return void
      */
     protected function _setAccessParameter()
     {
         if(null === $this->_loginName) {
             //OAuth login
             $this->getHttpClient()->setParameterGet('access_token', $this->_apiKey);
         } else {
             //login/APIKey authentication
             $this->getHttpClient()->setParameterGet('login',$this->_loginName);
             $this->getHttpClient()->setParameterGet('apiKey',$this->_apiKey);
         }
     }
 
     /**
      * handle bit.ly response
      *
      * @return string
      * @throws Zend_Service_ShortUrl_Exception
      */
     protected function _processRequest()
     {
         $response = $this->getHttpClient()->request();
         if(500 == $response->getStatus()) {
             throw new Zend_Service_ShortUrl_Exception('Bit.ly :: '.$response->getBody());
         }
         return $response->getBody();
     }
 
     /**
      * This function shortens long url
      *
      * @param  string $url URL to Shorten
      * @throws Zend_Service_ShortUrl_Exception if bit.ly reports an error
      * @return string Shortened Url
      */
     public function shorten($url)
     {
         $this->_validateUri($url);
         $this->_setAccessParameter();
 
         $this->getHttpClient()->setUri($this->_apiUri.'/v3/shorten');
         $this->getHttpClient()->setParameterGet('longUrl',$url);
         $this->getHttpClient()->setParameterGet('format','txt');
 
         return $this->_processRequest();
     }
 
     /**
      * Reveals target for short URL
      *
      * @param  string $shortenedUrl URL to reveal target of
      * @throws Zend_Service_ShortUrl_Exception if bit.ly reports an error
      * @return string Unshortened Url
      */
     public function unshorten($shortenedUrl)
     {
         $this->_validateUri($shortenedUrl);
         $this->_setAccessParameter();
 
         $this->getHttpClient()->setUri($this->_apiUri.'/v3/expand');
         $this->getHttpClient()->setParameterGet('shortUrl',$shortenedUrl);
         $this->getHttpClient()->setParameterGet('format','txt');
 
         return $this->_processRequest();
     }
 }