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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_Gdata
  * @subpackage Gdata
  * @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_Gdata_HttpClient
  */
 // require_once 'Zend/Gdata/HttpClient.php';
 
 /**
  * Zend_Version
  */
 // require_once 'Zend/Version.php';
 
 /**
  * Class to facilitate Google's "Account Authentication
  * for Installed Applications" also known as "ClientLogin".
  * @see http://code.google.com/apis/accounts/AuthForInstalledApps.html
  *
  * @category   Zend
  * @package    Zend_Gdata
  * @subpackage Gdata
  * @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_Gdata_ClientLogin
 {
 
     /**
      * The Google client login URI
      *
      */
     const CLIENTLOGIN_URI = 'https://www.google.com/accounts/ClientLogin';
 
     /**
      * The default 'source' parameter to send to Google
      *
      */
     const DEFAULT_SOURCE = 'Zend-ZendFramework';
 
     /**
      * Set Google authentication credentials.
      * Must be done before trying to do any Google Data operations that
      * require authentication.
      * For example, viewing private data, or posting or deleting entries.
      *
      * @param string $email
      * @param string $password
      * @param string $service
      * @param Zend_Gdata_HttpClient $client
      * @param string $source
      * @param string $loginToken The token identifier as provided by the server.
      * @param string $loginCaptcha The user's response to the CAPTCHA challenge.
      * @param string $accountType An optional string to identify whether the
      * account to be authenticated is a google or a hosted account. Defaults to
      * 'HOSTED_OR_GOOGLE'. See: http://code.google.com/apis/accounts/docs/AuthForInstalledApps.html#Request
      * @throws Zend_Gdata_App_AuthException
      * @throws Zend_Gdata_App_HttpException
      * @throws Zend_Gdata_App_CaptchaRequiredException
      * @return Zend_Gdata_HttpClient
      */
     public static function getHttpClient($email, $password, $service = 'xapi',
         $client = null,
         $source = self::DEFAULT_SOURCE,
         $loginToken = null,
         $loginCaptcha = null,
         $loginUri = self::CLIENTLOGIN_URI,
         $accountType = 'HOSTED_OR_GOOGLE')
     {
         if (! ($email && $password)) {
             // require_once 'Zend/Gdata/App/AuthException.php';
             throw new Zend_Gdata_App_AuthException(
                    'Please set your Google credentials before trying to ' .
                    'authenticate');
         }
 
         if ($client == null) {
             $client = new Zend_Gdata_HttpClient();
         }
         if (!$client instanceof Zend_Http_Client) {
             // require_once 'Zend/Gdata/App/HttpException.php';
             throw new Zend_Gdata_App_HttpException(
                     'Client is not an instance of Zend_Http_Client.');
         }
 
         // Build the HTTP client for authentication
         $client->setUri($loginUri);
         $useragent = $source . ' Zend_Framework_Gdata/' . Zend_Version::VERSION;
         $client->setConfig(array(
                 'maxredirects'    => 0,
                 'strictredirects' => true,
                 'useragent' => $useragent
             )
         );
         $client->setParameterPost('accountType', $accountType);
         $client->setParameterPost('Email', (string) $email);
         $client->setParameterPost('Passwd', (string) $password);
         $client->setParameterPost('service', (string) $service);
         $client->setParameterPost('source', (string) $source);
         if ($loginToken || $loginCaptcha) {
             if($loginToken && $loginCaptcha) {
                 $client->setParameterPost('logintoken', (string) $loginToken);
                 $client->setParameterPost('logincaptcha',
                         (string) $loginCaptcha);
             }
             else {
                 // require_once 'Zend/Gdata/App/AuthException.php';
                 throw new Zend_Gdata_App_AuthException(
                     'Please provide both a token ID and a user\'s response ' .
                     'to the CAPTCHA challenge.');
             }
         }
 
         // Send the authentication request
         // For some reason Google's server causes an SSL error. We use the
         // output buffer to supress an error from being shown. Ugly - but works!
         ob_start();
         try {
             $response = $client->request('POST');
         } catch (Zend_Http_Client_Exception $e) {
             // require_once 'Zend/Gdata/App/HttpException.php';
             throw new Zend_Gdata_App_HttpException($e->getMessage(), $e);
         }
         ob_end_clean();
 
         // Parse Google's response
         $goog_resp = array();
         foreach (explode("\n", $response->getBody()) as $l) {
             $l = chop($l);
             if ($l) {
                 list($key, $val) = explode('=', chop($l), 2);
                 $goog_resp[$key] = $val;
             }
         }
 
         if ($response->getStatus() == 200) {
             $client->setClientLoginToken($goog_resp['Auth']);
             $useragent = $source . ' Zend_Framework_Gdata/' . Zend_Version::VERSION;
             $client->setConfig(array(
                     'strictredirects' => true,
                     'useragent' => $useragent
                 )
             );
             return $client;
 
         } elseif ($response->getStatus() == 403) {
             // Check if the server asked for a CAPTCHA
             if (array_key_exists('Error', $goog_resp) &&
                 $goog_resp['Error'] == 'CaptchaRequired') {
                 // require_once 'Zend/Gdata/App/CaptchaRequiredException.php';
                 throw new Zend_Gdata_App_CaptchaRequiredException(
                     $goog_resp['CaptchaToken'], $goog_resp['CaptchaUrl']);
             }
             else {
                 // require_once 'Zend/Gdata/App/AuthException.php';
                 throw new Zend_Gdata_App_AuthException('Authentication with Google failed. Reason: ' .
                     (isset($goog_resp['Error']) ? $goog_resp['Error'] : 'Unspecified.'));
             }
         }
     }
 
 }