<?php
class Coursebackend_Davinci extends CourseBackend 
{

    private $location;
    public $serverID;
    
    public function setCredentials($json,$location,$serverID) {
        $this->location = $location."/DAVINCIIS.dll?";
        $this->serverID = $serverID;
        //Davinci doesn't have credentials
    }
    
    public function checkConection(){
        $this->fetchSchedulesInternal('B206');
        return $this->error;
    }
    public function getCredentials(){
        $return = array();
        return $return;
    }
    public function getDisplayName(){
        return'Davinci';
    }
    public function getCacheTime(){
        return 0;
    }
    public function getRefreshTime(){
        return 0;
    }
    private function toArray($response){

        $cleanresponse = preg_replace("/(<\/?)(\w+):([^>]*>)/", "$1$2$3", $response);
        $xml = new SimpleXMLElement($cleanresponse);
        $array = json_decode(json_encode((array)$xml), TRUE);
        return $array;
    }
    private function fetchArray($roomId){
        $startdate= new DateTime('monday this week');
        $enddate = new DateTime('sunday');
        $url= $this->location."content=xml&type=room&name=".$roomId."&startdate=".$startdate->format('d.m.Y')."&enddate=".$enddate->format('d.m.Y');
        $ch=curl_init();
        $options = array( 
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_SSL_VERIFYHOST => false,
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_URL            => $url ,			
            );

        curl_setopt_array($ch, $options);
        $output=curl_exec($ch);
        if( $output === false) 
        {
            $this->error = true;
            $this->errormsg = 'Curl error: ' . curl_error($soap_do);
            return 'Curl error: ' . curl_error($soap_do);
            } 
        else 
        {
            $this->error = false;
            $this->errormsg ="";
            ///Operation completed successfully
            }
        curl_close($ch);
        return $this->toArray($output);
        
    }
    public function fetchSchedulesInternal($roomIds){
        $shedules = [];
        foreach ($roomIds as $locationId => $sroomId) {
            $return = $this->fetchArray($sroomId);
            $lessons = $return['Lessons']['Lesson'];
            $timetable =[];
            foreach ($lessons as $lesson) {
                $date = $lesson['Date'];
                $date = substr($date,0,4).'-'.substr($date,4,2).'-'.substr($date,6,2);
                $start = $lesson['Start'];
                $start = substr($start,0,2).':'.substr($start,2,2);
                $end = $lesson['Finish'];
                $end = substr($end,0,2).':'.substr($end,2,2);
                $subject = $lesson['Subject'];
                $json = array(
                    'title' => $subject,
                    'start' => $date." ".$start.':00',
                    'end'   => $date." ".$end.':00'
                                );
                array_push($timetable,$json);
            }
             $timetable= json_encode($timetable);
            $shedules[$locationId] = $timetable;
        }
        return $shedules;
    }

}
?>