class.ilCalendarRemoteReader.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */
 
 
include_once './Services/WebServices/Curl/classes/class.ilCurlConnection.php';
include_once './Services/WebServices/Curl/classes/class.ilCurlConnectionException.php';
 
class ilCalendarRemoteReader
{
        
        const TYPE_ICAL = 1;
        
        // Fixed in the moment
        private $type = self::TYPE_ICAL;
        
        private $curl = null;
        
        private $url;
        private $user;
        private $pass;
        
        private $ical;
        
        
        public function __construct($a_url)
        {
                $this->url = $a_url;
        }
        
        public function setUser($a_user)
        {
                $this->user = $a_user;
        }
        
        public function setPass($a_pass)
        {
                $this->pass = $a_pass;
        }
        
        public function getType()
        {
                return $this->type;
        }
        
        public function getUrl()
        {
                return $this->url;
        }
 
 
        public function read()
        {
                $this->initCurl();
                
                switch($this->getType())
                {
                        case self::TYPE_ICAL:
                                return $this->readIcal();
                }
        }
 
        public function import(ilCalendarCategory $cat)
        {
                switch($this->getType())
                {
                        case self::TYPE_ICAL:
                                return $this->importIcal($cat);
                }
        }
        
        protected function readIcal()
        {
                $this->ical = $this->call();
                $GLOBALS['ilLog']->write(__METHOD__.': '.$this->ical);
                return true;
        }
        
        protected function importIcal(ilCalendarCategory $cat)
        {
                // Delete old appointments
                include_once('./Services/Calendar/classes/class.ilCalendarCategoryAssignments.php');
                foreach(ilCalendarCategoryAssignments::_getAssignedAppointments(array($cat->getCategoryID())) as $app_id)
                {
                        include_once('./Services/Calendar/classes/class.ilCalendarEntry.php');
                        ilCalendarEntry::_delete($app_id);
                }
                ilCalendarCategoryAssignments::_deleteByCategoryId($cat->getCategoryID());
                
                // Import new appointments
                include_once './Services/Calendar/classes/iCal/class.ilICalParser.php';
                $parser = new ilICalParser($this->ical, ilICalParser::INPUT_STRING);
                $parser->setCategoryId($cat->getCategoryID());
                $parser->parse();
        }
        
        protected function initCurl()
        {
                try {
                        
                        $this->replaceWebCalProtocol();
                        
                        $this->curl = new ilCurlConnection($this->getUrl());
                        $this->curl->init();
                        $this->curl->setOpt(CURLOPT_SSL_VERIFYPEER, 0);
                        $this->curl->setOpt(CURLOPT_SSL_VERIFYHOST, 0);
                        $this->curl->setOpt(CURLOPT_RETURNTRANSFER, 1);
                        
                        $this->curl->setOpt(CURLOPT_FOLLOWLOCATION, 1);
                        $this->curl->setOpt(CURLOPT_MAXREDIRS, 3);
                        
                        if($this->user)
                        {
                                $this->curl->setOpt(CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
                                $this->curl->setOpt(CURLOPT_USERPWD,$this->user.':'.$this->pass);
                        }
                }
                catch(Exception $e)
                {
                        throw $e;
                }
        }
        
        protected function replaceWebCalProtocol()
        {
                if(substr($this->getUrl(), 0, 6) == 'webcal')
                {
                        $purged = preg_replace('/webcal/', 'http', $this->getUrl(), 1);
                        $this->url = $purged;
                        $GLOBALS['ilLog']->write(__METHOD__.': Using new url: '. $this->getUrl());
                }
        }
        
        private function call()
        {
                try
                {
                        $res = $this->curl->exec();
                        return $res;
                }               
                catch(ilCurlConnectionException $exc)
                {
                        throw($exc);
                }
        }
        
        
        
}
 
?>