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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
  * @subpackage Rackspace
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 
 // require_once 'Zend/Http/Client.php';
 
 abstract class Zend_Service_Rackspace_Abstract
 {
     const VERSION                = 'v1.0';
     const US_AUTH_URL            = 'https://auth.api.rackspacecloud.com';
     const UK_AUTH_URL            = 'https://lon.auth.api.rackspacecloud.com';
     const API_FORMAT             = 'json';
     const USER_AGENT             = 'Zend_Service_Rackspace';
     const STORAGE_URL            = "X-Storage-Url";
     const AUTHTOKEN              = "X-Auth-Token";
     const AUTHUSER_HEADER        = "X-Auth-User";
     const AUTHKEY_HEADER         = "X-Auth-Key";
     const AUTHUSER_HEADER_LEGACY = "X-Storage-User";
     const AUTHKEY_HEADER_LEGACY  = "X-Storage-Pass";
     const AUTHTOKEN_LEGACY       = "X-Storage-Token";
     const CDNM_URL               = "X-CDN-Management-Url";
     const MANAGEMENT_URL         = "X-Server-Management-Url";
     /**
      * Rackspace Key
      *
      * @var string
      */
     protected $key;
     /**
      * Rackspace account name
      *
      * @var string
      */
     protected $user;
     /**
      * Token of authentication
      *
      * @var string
      */
     protected $token;
     /**
      * Authentication URL
      *
      * @var string
      */
     protected $authUrl;
     /**
      * @var Zend_Http_Client
      */
     protected $httpClient;
     /**
      * Error Msg
      *
      * @var string
      */
     protected $errorMsg;
     /**
      * HTTP error code
      *
      * @var string
      */
     protected $errorCode;
     /**
      * Storage URL
      *
      * @var string
      */
     protected $storageUrl;
     /**
      * CDN URL
      *
      * @var string
      */
     protected $cdnUrl;
     /**
      * Server management URL
      * 
      * @var string 
      */
     protected $managementUrl;
     /**
      * Do we use ServiceNet?
      * 
      * @var boolean
      */
     protected $useServiceNet = false;
     /**
      * Constructor
      *
      * You must pass the account and the Rackspace authentication key.
      * Optional: the authentication url (default is US)
      *
      * @param string $user
      * @param string $key
      * @param string $authUrl
      */
     public function __construct($user, $key, $authUrl=self::US_AUTH_URL)
     {
         if (!isset($user)) {
             // require_once 'Zend/Service/Rackspace/Exception.php';
             throw new Zend_Service_Rackspace_Exception("The user cannot be empty");
         }
         if (!isset($key)) {
             // require_once 'Zend/Service/Rackspace/Exception.php';
             throw new Zend_Service_Rackspace_Exception("The key cannot be empty");
         }
         if (!in_array($authUrl, array(self::US_AUTH_URL, self::UK_AUTH_URL))) {
             // require_once 'Zend/Service/Rackspace/Exception.php';
             throw new Zend_Service_Rackspace_Exception("The authentication URL should be valid");
         }
         $this->setUser($user);
         $this->setKey($key);
         $this->setAuthUrl($authUrl);
     }
     /**
      * Get User account
      *
      * @return string
      */
     public function getUser()
     {
         return $this->user;
     }
     /**
      * Get user key
      *
      * @return string
      */
     public function getKey()
     {
         return $this->key;
     }
     /**
      * Get authentication URL
      *
      * @return string
      */
     public function getAuthUrl()
     {
         return $this->authUrl;
     }
     /**
      * Get the storage URL
      *
      * @return string|boolean
      */
     public function getStorageUrl() 
     {
         if (empty($this->storageUrl)) {
             if (!$this->authenticate()) {
                 return false;
             }
         }
         return $this->storageUrl;
     }
     /**
      * Get the CDN URL
      *
      * @return string|boolean
      */
     public function getCdnUrl() 
     {
         if (empty($this->cdnUrl)) {
             if (!$this->authenticate()) {
                 return false;
             }
         }
         return $this->cdnUrl;
     }
     /**
      * Get the management server URL
      * 
      * @return string|boolean
      */     
     public function getManagementUrl()
     {
         if (empty($this->managementUrl)) {
             if (!$this->authenticate()) {
                 return false;
             }
         }
         return $this->managementUrl;
     }
     /**
      * Set the user account
      *
      * @param string $user
      * @return void
      */
     public function setUser($user)
     {
         if (!empty($user)) {
             $this->user = $user;
         }
     }
     /**
      * Set the authentication key
      *
      * @param string $key
      * @return void
      */
     public function setKey($key)
     {
         if (!empty($key)) {
             $this->key = $key;
         }
     }
     /**
      * Set the Authentication URL
      *
      * @param string $url
      * @return void
      */
     public function setAuthUrl($url)
     {
         if (!empty($url) && in_array($url, array(self::US_AUTH_URL, self::UK_AUTH_URL))) {
             $this->authUrl = $url;
         } else {
             // require_once 'Zend/Service/Rackspace/Exception.php';
             throw new Zend_Service_Rackspace_Exception("The authentication URL is not valid");
         }
     }
     
     /**
      * Sets whether to use ServiceNet
      * 
      * ServiceNet is Rackspace's internal network. Bandwidth on ServiceNet is
      * not charged.
      * 
      * @param boolean $useServiceNet
      */
     public function setServiceNet($useServiceNet = true)
     {
         $this->useServiceNet = $useServiceNet;
         return $this;
     }
 
     /**
      * Get whether we're using ServiceNet
      * 
      * @return boolean
      */
     public function getServiceNet()
     {
         return $this->useServiceNet;
     }
 
     /**
      * Get the authentication token
      *
      * @return string
      */
     public function getToken()
     {
         if (empty($this->token)) {
             if (!$this->authenticate()) {
                 return false;
             }
         }
         return $this->token;
     }
     /**
      * Get the error msg of the last HTTP call
      *
      * @return string
      */
     public function getErrorMsg() 
     {
         return $this->errorMsg;
     }
     /**
      * Get the error code of the last HTTP call
      * 
      * @return strig 
      */
     public function getErrorCode() 
     {
         return $this->errorCode;
     }
     /**
      * get the HttpClient instance
      *
      * @return Zend_Http_Client
      */
     public function getHttpClient()
     {
         if (empty($this->httpClient)) {
             $this->httpClient = new Zend_Http_Client();
         }
         return $this->httpClient;
     }
     /**
      * Return true is the last call was successful
      * 
      * @return boolean 
      */
     public function isSuccessful()
     {
         return ($this->errorMsg=='');
     }
     /**
      * HTTP call
      *
      * @param string $url
      * @param string $method
      * @param array $headers
      * @param array $get
      * @param string $body
      * @return Zend_Http_Response
      */
     protected function httpCall($url,$method,$headers=array(),$data=array(),$body=null)
     {
         $client = $this->getHttpClient();
         $client->resetParameters(true);
         if ($method == 'PUT' && empty($body)) {
             // if left at NULL a PUT request will always have 
             // Content-Type: x-url-form-encoded, which breaks copyObject()
             $client->setEncType(''); 
         }
         if (empty($headers[self::AUTHUSER_HEADER])) {
             $headers[self::AUTHTOKEN]= $this->getToken();
         } 
         $client->setMethod($method);
         if (empty($data['format'])) {
             $data['format']= self::API_FORMAT;
         }
         $client->setParameterGet($data);    
         if (!empty($body)) {
             $client->setRawData($body);
             if (!isset($headers['Content-Type'])) {
                 $headers['Content-Type']= 'application/json';
             }
         }
         $client->setHeaders($headers);
         $client->setUri($url);
         $this->errorMsg='';
         $this->errorCode='';
         return $client->request();
     }
     /**
      * Authentication
      *
      * @return boolean
      */
     public function authenticate()
     {
         if (empty($this->user)) {
             /**
              * @see Zend_Service_Rackspace_Exception
              */
             // require_once 'Zend/Service/Rackspace/Exception.php';
             throw new Zend_Service_Rackspace_Exception("User has not been set");
         }
 
         $headers = array (
             self::AUTHUSER_HEADER => $this->user,
             self::AUTHKEY_HEADER => $this->key
         );
         $result = $this->httpCall($this->authUrl.'/'.self::VERSION,'GET', $headers);
         if ($result->getStatus()==204) {
             $this->token = $result->getHeader(self::AUTHTOKEN);
             $this->cdnUrl = $result->getHeader(self::CDNM_URL);
             $this->managementUrl = $result->getHeader(self::MANAGEMENT_URL);
             $storageUrl = $result->getHeader(self::STORAGE_URL);
             if ($this->useServiceNet) {
                 $storageUrl = preg_replace('|(.*)://([^/]*)(.*)|', '$1://snet-$2$3', $storageUrl);
             }
             $this->storageUrl = $storageUrl;
             return true;
         }
         $this->errorMsg = $result->getBody();
         $this->errorCode = $result->getStatus();
         return false;
     } 
 }