<?php

#This file is part of Wiziq - http://www.wiziq.com/
#Edited by Şevket Polan

set_time_limit(0);

class wiziq_authbase {
    
     # This function defines the secret access key and access key.
     # @param string $wiziq_secretaccesskey
     # @param string $wiziq_access_key
     
    public function __construct($wiziq_secretaccesskey, $wiziq_access_key) {
        $this->wiziq_secretaccesskey=$wiziq_secretaccesskey;
        $this->wiziq_access_key=$wiziq_access_key;
    }
    /**
     * This function generates the timestamp.
     *
     * @return integer time.
     */
    public function wiziq_generatetimestamp() {
        return time();
    }
    /**
     * This function generates the signature in order to send a http request.
     *
     * @param string $methodname name of the method.
     * @param string $requestparameters parameters that are required for http request.
     *
     * @return string
     */
    public function wiziq_generatesignature($methodname, &$requestparameters) {
        $signaturebase="";
        $wiziq_secretaccesskey = urlencode($this->wiziq_secretaccesskey);
        $requestparameters["access_key"] = $this->wiziq_access_key;
        $requestparameters["timestamp"] =$this->wiziq_generatetimestamp();
        $requestparameters["method"] = $methodname;
        foreach ($requestparameters as $key => $value) {
            $signaturebaselenght = strlen($signaturebase);
            if ($signaturebaselenght > 0) {
                $signaturebase.="&";
            }
            $signaturebase.="$key=$value";
        }
        return base64_encode($this->wiziq_hmacsha1($wiziq_secretaccesskey, $signaturebase));
    }

    /**
     * This function generates the hash based message authentication code(hmac)
     * using cryptographic hash function sha1.
     *
     * @param string $key cryptographic key.
     * @param string $data the data which will be appended.
     *
     * @return string $hmac
     */
    public function wiziq_hmacsha1($key, $data) {
        $blocksize=64;
        $hashfunc='sha1';
        $keylenght = strlen($key);
        if ($keylenght > $blocksize) {
            $key=pack('H*', $hashfunc($key));
        }
        $key=str_pad($key, $blocksize, chr(0x00));
        $ipad=str_repeat(chr(0x36), $blocksize);
        $opad=str_repeat(chr(0x5c), $blocksize);
        $hmac = pack(
            'H*', $hashfunc(
                ($key^$opad).pack(
                    'H*', $hashfunc(
                        ($key^$ipad).$data
                    )
                )
            )
        );
        return $hmac;
    }
}//end class wiziq_authbase

class wiziq_httprequest {
    /**
     * This function generates a http request using curl.
     *
     * @param string $url this is wiziq url to which request is to be send.
     * @param array $data which contains the request paramters.
     * @param string $optional_headers
     *
     * @return string $response.
     */
    public function wiziq_do_post_request($url, $data, $optional_headers = null) {
        try {
            $ch = curl_init();
            curl_setopt($ch,CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_HEADER, FALSE);
            curl_setopt($ch, CURLOPT_VERBOSE, TRUE);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
            curl_setopt($ch,CURLOPT_POSTFIELDS, $data);

      //execute post
        $result = curl_exec($ch);
      //close connection
        curl_close($ch);
            return $result;
        } catch (Exception $e) {
            $errorexecption = $e->getMessage();
            $errormsg = get_string('errorinservice', 'wiziq'). " " . $errorexecption;
            print_error($errormsg);
        }
    }
}//end class wiziq_httprequest

<?php
class ScheduleClass
{
	public function __construct($secretAccessKey,$access_key,$webServiceUrl)
	{
		require_once("authbase.php");
		$authBase = new wiziq_authbase($secretAccessKey,$access_key);
		$method = "create";
		$requestParameters["signature"]=$authBase->wiziq_generatesignature($method,$requestParameters);
		#for teacher account pass parameter 'presenter_email'
                //This is the unique email of the presenter that will identify the presenter in WizIQ. Make sure to add
                //this presenter email to your organization's teacher account.For more information visit at: (http://developer.wiziq.com/faqs)
		$requestParameters["presenter_email"]="[email protected]";
		#for room based account pass parameters 'presenter_id', 'presenter_name'
		//$requestParameters["presenter_id"] = "40";
		//$requestParameters["presenter_name"] = "sevketpolan";
		$requestParameters["start_time"] = "12/08/2019 16:00";
		$requestParameters["title"]="my php-class 2"; //Required
		$requestParameters["duration"]="30"; //optional
		$requestParameters["time_zone"]="Europe/Istanbul"; //optional
		$requestParameters["attendee_limit"]=""; //optional
		$requestParameters["control_category_id"]=""; //optional
		$requestParameters["create_recording"]=""; //optional
		$requestParameters["return_url"]=""; //optional
		$requestParameters["status_ping_url"]=""; //optional
                $requestParameters["language_culture_name"]="tr-TR";
		$httpRequest=new wiziq_httprequest();
		try
		{
			$XMLReturn=$httpRequest->wiziq_do_post_request($webServiceUrl.'?method=create',http_build_query($requestParameters, '', '&'));
		}
		catch(Exception $e)
		{
	  		echo $e->getMessage();
		}
 		if(!empty($XMLReturn))
 		{
 			try
			{
			  $objDOM = new DOMDocument();
			  $objDOM->loadXML($XMLReturn);

			}
			catch(Exception $e)
			{
			  echo $e->getMessage();
			}
		$status=$objDOM->getElementsByTagName("rsp")->item(0);
    	$attribNode = $status->getAttribute("status");
		if($attribNode=="ok")
		{
			$methodTag=$objDOM->getElementsByTagName("method");
			echo "method=".$method=$methodTag->item(0)->nodeValue;
			$class_idTag=$objDOM->getElementsByTagName("class_id");
			echo "<br>Class ID=".$class_id=$class_idTag->item(0)->nodeValue;
			$recording_urlTag=$objDOM->getElementsByTagName("recording_url");
			echo "<br>recording_url=".$recording_url=$recording_urlTag->item(0)->nodeValue;
			$presenter_emailTag=$objDOM->getElementsByTagName("presenter_email");
			echo "<br>presenter_email=".$presenter_email=$presenter_emailTag->item(0)->nodeValue;
			$presenter_urlTag=$objDOM->getElementsByTagName("presenter_url");
			echo "<br>presenter_url=".$presenter_url=$presenter_urlTag->item(0)->nodeValue;
		}
		else if($attribNode=="fail")
		{
			$error=$objDOM->getElementsByTagName("error")->item(0);
   			echo "<br>errorcode=".$errorcode = $error->getAttribute("code");
   			echo "<br>errormsg=".$errormsg = $error->getAttribute("msg");
		}
	 }//end if
   }//end function

}
?>

<?php
		$access_key="<<YOUR ACCESS KEY>>";
		$secretAccessKey="<<YOUR SECRET ACCESS KEY>>";
		$webServiceUrl="http://classapi.wiziqxt.com/apimanager.ashx";



		require_once("create.php");
		$obj=new ScheduleClass($secretAccessKey,$access_key,$webServiceUrl);

		//require_once("ModifyClass.php");
		//$obj=new ModifyClass($secretAccessKey,$access_key,$webServiceUrl);

		//require_once("AddAttendee.php");
		//$obj=new AddAttendee($secretAccessKey,$access_key,$webServiceUrl);

		//require_once("CancelClass.php");
		//$obj=new CancelClass($secretAccessKey,$access_key,$webServiceUrl);


		//require_once("DownloadRecording.php");
		/*$obj = new DownloadRecording($secretAccessKey, $access_key, $webServiceUrl);
		 In the above download recording output xml there is a <status_xml_path> i.e. http://wiziq.com/download/1234.xml
		   this xml would contain all the necessary status for the recording download
		   e.g -:
		   <rsp status='ok'>
		   <method>download_recording</method>
		   <download_recording status='true'>
		   <download_status>false</download_status>
		   <message>Download Recording has been started..</message>
		   <recording_download_path>http://wiziq.com/download/recording_9195.exe</recording_download_path>
		   </download_recording>
		   </rsp>
		   Actual recording file path will be the value of node <recording_download_path> obtained by requesting above xml
		 */
?>