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<?php defined('BASEPATH') OR exit('No direct script access allowed');

/**
**/

/**
 * CodeIgniter MCurl Class
 *
 * Work with remote servers via multi-cURL much easier than using the native PHP bindings.
 *
 * @package                     CodeIgniter
 * @subpackage          Libraries
 * @category            Libraries
 * @author                      Chad Hutchins
 * @link                        http://github.com/chadhutchins/codeigniter-mcurl
 */
 
class Mcurl {

        private $_ci;                           // CodeIgniter instance
        private $calls = array();       // multidimensional array that holds individual calls and data
        private $curl_parent;           // the curl multi handle resource

        function __construct()
        {
                $this->_ci = & get_instance();
                log_message('debug', 'Mcurl Class Initialized');

                if (!$this->is_enabled())
                {
                        log_message('error', 'Mcurl Class - PHP was not built with cURL enabled. Rebuild PHP with --with-curl to use cURL.');
                }
                else 
                {
                        $this->curl_parent = curl_multi_init();
                }
        }

        // check to see if necessary function exists
        function is_enabled()
        {
                return function_exists('curl_multi_init');
        }

        // method to add curl requests to the multi request queue
        function add_call($key=null, $method, $url, $params = array(), $options = array())
        {
                if (is_null($key))
                {
                        $key = count($this->calls);
                }
                
                // check to see if the multi handle has been closed
                // init the multi handle again
                $resource_type = get_resource_type($this->curl_parent);
                if(!$resource_type || $resource_type == 'Unknown')
                {
                        $this->calls = array();
                        $this->curl_parent = curl_multi_init();
                }

                $this->calls [$key]= array(
                        "method" => $method,
                        "url" => $url,
                        "params" => $params,
                        "options" => $options,
                        "curl" => null,
                        "response" => null,
                        "error" => null
                );

                $this->calls[$key]["curl"] = curl_init();

                $newdata =$params;
                // If its an array (instead of a query string) then format it correctly
                if (is_array($params))
                {
                        $params = http_build_query($params, NULL, '&');
                }

                $method = strtoupper($method);
                
                // only supports get/post requests
                // set some special curl opts for each type of request
                switch ($method)
                {                       
                        case "POST":
                                curl_setopt($this->calls[$key]["curl"], CURLOPT_URL, $url);
                                curl_setopt($this->calls[$key]["curl"], CURLOPT_POST, TRUE);
                                curl_setopt($this->calls[$key]["curl"], CURLOPT_POSTFIELDS, $params);
                                curl_setopt($this->calls[$key]["curl"], CURLOPT_SSL_VERIFYPEER, false);
                                break;

                        case "GET":
                                if (strpos($url,'?') !== false) {
                                curl_setopt($this->calls[$key]["curl"], CURLOPT_URL, $url."&".$params);
                        }
                        else{
                                curl_setopt($this->calls[$key]["curl"], CURLOPT_URL, $url."?".$params);
                        }
                                curl_setopt($this->calls[$key]["curl"], CURLOPT_SSL_VERIFYPEER, false);
                                break;

                        default:
                                log_message('error', 'Mcurl Class - Provided http method is not supported. Only POST and GET are currently supported.');
                                break;
                }

                curl_setopt($this->calls[$key]["curl"], CURLOPT_RETURNTRANSFER, TRUE);
                curl_setopt($this->calls[$key]["curl"], CURLOPT_FOLLOWLOCATION, TRUE);

                curl_setopt_array($this->calls[$key]["curl"], $options);

                curl_multi_add_handle($this->curl_parent,$this->calls[$key]["curl"]);            
        }

        // run the calls in the curl requests in $this->calls
        function execute()
        {
                if (count($this->calls))
                {
                        // kick off the requests
                        do
                        {
                                $multi_exec_handle = curl_multi_exec($this->curl_parent,$active);
                        } while ($active>0);

                        // after all requests finish, set errors and repsonses in $this->calls
                        foreach ($this->calls as $key => $call)
                        {
                                $error = curl_error($this->calls[$key]["curl"]);
                                if (!empty($error))
                                {
                                        $this->calls[$key]["error"] = $error;
                                }
                                $this->calls[$key]["response"] = curl_multi_getcontent($this->calls[$key]["curl"]);
                                curl_multi_remove_handle($this->curl_parent,$this->calls[$key]["curl"]);
                        }

                        curl_multi_close($this->curl_parent);
                }

                return $this->calls;
        }
        
        function debug()
        {
                echo "<h2>mcurl debug</h2>";
                foreach ($this->calls as $call)
                {
                        echo '<p>url: <b>'.$call["url"].'</b></p>';
                        if (!is_null($call["error"]))
                        {
                                echo '<p style="color:red;">error: <b>'.$call["error"].'</b></p>';
                        }
                        echo '<textarea cols="100" rows="10">'.htmlentities($call["response"])."</textarea><hr>";
                }
        }

}

/* End of file mcurl.php */
/* Location: ./application/libraries/mcurl.php */