<?php

/* Load OAuth lib. You can find it at http://oauth.net */
require_once('oauth.php');

if (!class_exists('TwitterOAuthMonarch')) {

    /**
     * Twitter OAuth class
     */
    class TwitterOAuthMonarch {
      /* Contains the last HTTP status code returned. */
      public $http_code;
      /* Contains the last API call. */
      public $url;
      /* Set up the API root URL. */
      public $host = "https://api.twitter.com/1.1/";
      /* Set timeout default. */
      public $timeout = 30;
      /* Set connect timeout. */
      public $connecttimeout = 30;
      /* Verify SSL Cert. */
      public $ssl_verifypeer = FALSE;
      /* Respons format. */
      public $format = 'json';
      /* Decode returned json data. */
      public $decode_json = false;
      /* Contains the last HTTP headers returned. */
      public $http_info;
      /* Set the useragnet. */
      public $useragent = 'TwitterOAuth v0.2.0-beta2';
      /* Immediately retry the API call if the response was not successful. */
      //public $retry = TRUE;

      /**
       * Set API URLS
       */
      function accessTokenURL() {
          return 'https://api.twitter.com/oauth/access_token';
      }
      function authenticateURL() {
          return 'https://twitter.com/oauth/authenticate';
      }
      function authorizeURL() {
          return 'https://twitter.com/oauth/authorize';
      }
      function requestTokenURL() {
          return 'https://api.twitter.com/oauth/request_token';
      }

      /**
       * Debug helpers
       */
      function lastStatusCode() {
          return $this->http_status;
      }
      function lastAPICall() {
          return $this->last_api_call;
      }

      /**
      * construct TwitterOAuth object
      */
      function __construct($consumer_key, $consumer_secret, $oauth_token = NULL, $oauth_token_secret = NULL) {
          $this->sha1_method = new OAuthSignatureMethod_HMAC_SHA1();
          $this->consumer = new OAuthConsumer($consumer_key, $consumer_secret);
          if (!empty($oauth_token) && !empty($oauth_token_secret)) {
              $this->token = new OAuthConsumer($oauth_token, $oauth_token_secret);
          } else {
              $this->token = NULL;
          }
      }

      /**
       * Get a request_token from Twitter
       *
       * @returns a key/value array containing oauth_token and oauth_token_secret
       */
       function getRequestToken($oauth_callback = NULL) {
           $parameters = array();
           if (!empty($oauth_callback)) {
               $parameters['oauth_callback'] = $oauth_callback;
           }
           $request = $this->oAuthRequest($this->requestTokenURL(), 'GET', $parameters);
           $token = OAuthUtil::parse_parameters($request);
           $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']);
           return $token;
       }

       /**
       * Get the authorize URL
       *
       * @returns a string
       */

       function getAuthorizeURL($token, $sign_in_with_twitter = TRUE) {

           if (is_array($token)) {
               $token = $token['oauth_token'];
           }

           if (empty($sign_in_with_twitter)) {
               return $this->authorizeURL() . "?oauth_token={$token}";
           } else {
               return $this->authenticateURL() . "?oauth_token={$token}";
           }
       }

       /**
       * Exchange request token and secret for an access token and
       * secret, to sign API calls.
       *
       */

       function getAccessToken($oauth_verifier = FALSE) {
            $parameters = array();
            if (!empty($oauth_verifier)) {
                $parameters['oauth_verifier'] = $oauth_verifier;
            }
            $request = $this->oAuthRequest($this->accessTokenURL(), 'GET', $parameters);
            $token = OAuthUtil::parse_parameters($request);
            $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']);
            return $token;
       }

       /**
       * One time exchange of username and password for access token and secret.
       *
       * @returns array("oauth_token" => "the-access-token",
       *                "oauth_token_secret" => "the-access-secret",
       *                "user_id" => "9436992",
       *                "screen_name" => "abraham",
       *                "x_auth_expires" => "0")
       */

       function getXAuthToken($username, $password) {
           $parameters = array();
           $parameters['x_auth_username'] = $username;
           $parameters['x_auth_password'] = $password;
           $parameters['x_auth_mode'] = 'client_auth';
           $request = $this->oAuthRequest($this->accessTokenURL(), 'POST', $parameters);
           $token = OAuthUtil::parse_parameters($request);
           $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']);
           return $token;
       }

       /**
       * GET wrapper for oAuthRequest.
       */
       function get($url, $parameters = array()) {
           $response = $this->oAuthRequest($url, 'GET', $parameters);
           if ($this->format === 'json' && $this->decode_json) {
               return json_decode($response);
           }
           return $response;
       }

        /**
       * POST wrapper for oAuthRequest.
       */

       function post($url, $parameters = array()) {
           $response = $this->oAuthRequest($url, 'POST', $parameters);
           if ($this->format === 'json' && $this->decode_json) {
               return json_decode($response);
           }
           return $response;
       }

       /**
       * DELETE wrapper for oAuthReqeust.
       */
       function delete($url, $parameters = array()) {
           $response = $this->oAuthRequest($url, 'DELETE', $parameters);
           if ($this->format === 'json' && $this->decode_json) {
               return json_decode($response);
           }
           return $response;
       }

       /**
       * Format and sign an OAuth / API request
       */
       function oAuthRequest($url, $method, $parameters) {
           if (strrpos($url, 'https://') !== 0 && strrpos($url, 'http://') !== 0) {
               $url = "{$this->host}{$url}.{$this->format}";
           }
           $request = OAuthRequest::from_consumer_and_token($this->consumer, $this->token, $method, $url, $parameters);
           $request->sign_request($this->sha1_method, $this->consumer, $this->token);
           switch ($method) {
               case 'GET':
                    return $this->http($request->to_url(), 'GET');
               default:
                    return $this->http($request->get_normalized_http_url(), $method, $request->to_postdata());
           }
       }

       /**
       * Make an HTTP request
       *
       * @return API results
       */
       function http($url, $method, $postfields = NULL) {
           $this->http_info = array();
           $ci = curl_init();
           /* Curl settings */
           curl_setopt($ci, CURLOPT_USERAGENT, $this->useragent);
           curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, $this->connecttimeout);
           curl_setopt($ci, CURLOPT_TIMEOUT, $this->timeout);
           curl_setopt($ci, CURLOPT_RETURNTRANSFER, TRUE);
           curl_setopt($ci, CURLOPT_HTTPHEADER, array('Expect:'));
           curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, $this->ssl_verifypeer);
           curl_setopt($ci, CURLOPT_HEADERFUNCTION, array($this, 'getHeader'));
           curl_setopt($ci, CURLOPT_HEADER, FALSE);

           switch ($method) {
               case 'POST':
                    curl_setopt($ci, CURLOPT_POST, TRUE);
                    if (!empty($postfields)) {
                        curl_setopt($ci, CURLOPT_POSTFIELDS, $postfields);
                    }
                    break;
               case 'DELETE':
                    curl_setopt($ci, CURLOPT_CUSTOMREQUEST, 'DELETE');
                    if (!empty($postfields)) {
                        $url = "{$url}?{$postfields}";
                    }
           }

           curl_setopt($ci, CURLOPT_URL, $url);
           $response = curl_exec($ci);
           $this->http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);
           $this->http_info = array_merge($this->http_info, curl_getinfo($ci));
           $this->url = $url;
           curl_close ($ci);
           return $response;
       }

       /**
       * Get the header info to store.
       */
       function getHeader($ch, $header) {
           $i = strpos($header, ':');
           if (!empty($i)) {
                $key = str_replace('-', '_', strtolower(substr($header, 0, $i)));
                $value = trim(substr($header, $i + 2));
                $this->http_header[$key] = $value;
           }
           return strlen($header);
       }
    }
} // class_exists check
?>