<?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_Oauth

 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Client.php 25167 2012-12-19 16:28:01Z matthew $

 */

/** Zend_Oauth */

require_once 'Zend/Oauth.php';

/** Zend_Http_Client */

require_once 'Zend/Http/Client.php';

/** Zend_Oauth_Http_Utility */

require_once 'Zend/Oauth/Http/Utility.php';

/** Zend_Oauth_Config */

require_once 'Zend/Oauth/Config.php';

/**

 * @category   Zend

 * @package    Zend_Oauth

 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Oauth_Client extends Zend_Http_Client

{

    /**

     * Flag to indicate that the client has detected the server as supporting

     * OAuth 1.0a

     */

    public static $supportsRevisionA = false;

    /**

     * Holds the current OAuth Configuration set encapsulated in an instance

     * of Zend_Oauth_Config; it's not a Zend_Config instance since that level

     * of abstraction is unnecessary and doesn't let me escape the accessors

     * and mutators anyway!

     *

     * @var Zend_Oauth_Config

     */

    protected $_config = null;

    /**

     * True if this request is being made with data supplied by

     * a stream object instead of a raw encoded string.

     *

     * @var bool

     */

    protected $_streamingRequest = null;

    /**

     * Constructor; creates a new HTTP Client instance which itself is

     * just a typical Zend_Http_Client subclass with some OAuth icing to

     * assist in automating OAuth parameter generation, addition and

     * cryptographioc signing of requests.

     *

     * @param  array|Zend_Config $oauthOptions

     * @param  string            $uri

     * @param  array|Zend_Config $config

     * @return void

     */

    public function __construct($oauthOptions, $uri = null, $config = null)

    {

        if ($config instanceof Zend_Config && !isset($config->rfc3986_strict)) {

            $config                   = $config->toArray();

            $config['rfc3986_strict'] = true;

        } else if (null === $config ||

                   (is_array($config) && !isset($config['rfc3986_strict']))) {

            $config['rfc3986_strict'] = true;

        }

        parent::__construct($uri, $config);

        $this->_config = new Zend_Oauth_Config;

        if ($oauthOptions !== null) {

            if ($oauthOptions instanceof Zend_Config) {

                $oauthOptions = $oauthOptions->toArray();

            }

            $this->_config->setOptions($oauthOptions);

        }

    }

   /**

     * Load the connection adapter

     *

     * @param Zend_Http_Client_Adapter_Interface $adapter

     * @return void

     */

    public function setAdapter($adapter)

    {

        if ($adapter == null) {

            $this->adapter = $adapter;

        } else {

              parent::setAdapter($adapter);

        }

    }

    /**

     * Set the streamingRequest variable which controls whether we are

     * sending the raw (already encoded) POST data from a stream source.

     *

     * @param boolean $value The value to set.

     * @return void

     */

    public function setStreamingRequest($value)

    {

        $this->_streamingRequest = $value;

    }

    /**

     * Check whether the client is set to perform streaming requests.

     *

     * @return boolean True if yes, false otherwise.

     */

    public function getStreamingRequest()

    {

        if ($this->_streamingRequest) {

            return true;

        } else {

            return false;

        }

    }

    /**

     * Prepare the request body (for POST and PUT requests)

     *

     * @return string

     * @throws Zend_Http_Client_Exception

     */

    protected function _prepareBody()

    {

        if($this->_streamingRequest) {

            $this->setHeaders(self::CONTENT_LENGTH,

                $this->raw_post_data->getTotalSize());

            return $this->raw_post_data;

        }

        else {

            return parent::_prepareBody();

        }

    }

    /**

     * Clear all custom parameters we set.

     *

     * @return Zend_Http_Client

     */

    public function resetParameters($clearAll = false)

    {

        $this->_streamingRequest = false;

        return parent::resetParameters($clearAll);

    }

    /**

     * Set the raw (already encoded) POST data from a stream source.

     *

     * This is used to support POSTing from open file handles without

     * caching the entire body into memory. It is a wrapper around

     * Zend_Http_Client::setRawData().

     *

     * @param string $data The request data

     * @param string $enctype The encoding type

     * @return Zend_Http_Client

     */

    public function setRawDataStream($data, $enctype = null)

    {

        $this->_streamingRequest = true;

        return $this->setRawData($data, $enctype);

    }

    /**

     * Same as Zend_Http_Client::setMethod() except it also creates an

     * Oauth specific reference to the method type.

     * Might be defunct and removed in a later iteration.

     *

     * @param  string $method

     * @return Zend_Http_Client

     */

    public function setMethod($method = self::GET)

    {

        if ($method == self::GET) {

            $this->setRequestMethod(self::GET);

        } elseif($method == self::POST) {

            $this->setRequestMethod(self::POST);

        } elseif($method == self::PUT) {

            $this->setRequestMethod(self::PUT);

        } elseif($method == self::DELETE) {

            $this->setRequestMethod(self::DELETE);

        } elseif($method == self::HEAD) {

            $this->setRequestMethod(self::HEAD);

        } elseif($method == self::OPTIONS) {

            $this->setRequestMethod(self::OPTIONS);

        }

        return parent::setMethod($method);

    }

    /**

     * Same as Zend_Http_Client::request() except just before the request is

     * executed, we automatically append any necessary OAuth parameters and

     * sign the request using the relevant signature method.

     *

     * @param  string $method

     * @return Zend_Http_Response

     */

    public function request($method = null)

    {

        if ($method !== null) {

            $this->setMethod($method);

        }

        $this->prepareOauth();

        return parent::request();

    }

    /**

     * Performs OAuth preparation on the request before sending.

     *

     * This primarily means taking a request, correctly encoding and signing

     * all parameters, and applying the correct OAuth scheme to the method

     * being used.

     *

     * @return void

     * @throws Zend_Oauth_Exception If POSTBODY scheme requested, but GET request method used; or if invalid request scheme provided

     */

    public function prepareOauth()

    {

        $requestScheme = $this->getRequestScheme();

        $requestMethod = $this->getRequestMethod();

        $query = null;

        if ($requestScheme == Zend_Oauth::REQUEST_SCHEME_HEADER) {

            $oauthHeaderValue = $this->getToken()->toHeader(

                $this->getUri(true),

                $this->_config,

                $this->_getSignableParametersAsQueryString(),

                $this->getRealm()

            );

            $this->setHeaders('Authorization', $oauthHeaderValue);

        } elseif ($requestScheme == Zend_Oauth::REQUEST_SCHEME_POSTBODY) {

            if ($requestMethod == self::GET) {

                require_once 'Zend/Oauth/Exception.php';

                throw new Zend_Oauth_Exception(

                    'The client is configured to'

                    . ' pass OAuth parameters through a POST body but request method'

                    . ' is set to GET'

                );

            }

            $raw = $this->getToken()->toQueryString(

                $this->getUri(true),

                $this->_config,

                $this->_getSignableParametersAsQueryString()

            );

            $this->setRawData($raw, 'application/x-www-form-urlencoded');

            $this->paramsPost = array();

        } elseif ($requestScheme == Zend_Oauth::REQUEST_SCHEME_QUERYSTRING) {

            $params = $this->paramsGet;            

            $query = $this->getUri()->getQuery();

            if ($query) {

                $queryParts = explode('&', $this->getUri()->getQuery());

                foreach ($queryParts as $queryPart) {

                    $kvTuple = explode('=', $queryPart);

                    $params[urldecode($kvTuple[0])] =

                        (array_key_exists(1, $kvTuple) ? urldecode($kvTuple[1]) : null);

                }

            }

            if (!empty($this->paramsPost)) {

                $params = array_merge($params, $this->paramsPost);

                $query  = $this->getToken()->toQueryString(

                    $this->getUri(true), $this->_config, $params

                );

            }

            $query = $this->getToken()->toQueryString(

                $this->getUri(true), $this->_config, $params

            );

            $this->getUri()->setQuery($query);

            $this->paramsGet = array();

        } else {

            require_once 'Zend/Oauth/Exception.php';

            throw new Zend_Oauth_Exception('Invalid request scheme: ' . $requestScheme);

        }

    }

    /**

     * Collect all signable parameters into a single array across query string

     * and POST body. These are returned as a properly formatted single

     * query string.

     *

     * @return string

     */

    protected function _getSignableParametersAsQueryString()

    {

        $params = array();

            if (!empty($this->paramsGet)) {

                $params = array_merge($params, $this->paramsGet);

                $query  = $this->getToken()->toQueryString(

                    $this->getUri(true), $this->_config, $params

                );

            }

            if (!empty($this->paramsPost)) {

                $params = array_merge($params, $this->paramsPost);

                $query  = $this->getToken()->toQueryString(

                    $this->getUri(true), $this->_config, $params

                );

            }

            return $params;

    }

    /**

     * Simple Proxy to the current Zend_Oauth_Config method. It's that instance

     * which holds all configuration methods and values this object also presents

     * as it's API.

     *

     * @param  string $method

     * @param  array $args

     * @return mixed

     * @throws Zend_Oauth_Exception if method does not exist in config object

     */

    public function __call($method, array $args)

    {

        if (!method_exists($this->_config, $method)) {

            require_once 'Zend/Oauth/Exception.php';

            throw new Zend_Oauth_Exception('Method does not exist: ' . $method);

        }

        return call_user_func_array(array($this->_config,$method), $args);

    }

}