class.ilCalendarRemoteAccessHandler.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 ILIAS open source, University of Cologne            |
        |                                                                             |
        | This program is free software; you can redistribute it and/or               |
        | modify it under the terms of the GNU General Public License                 |
        | as published by the Free Software Foundation; either version 2              |
        | of the License, or (at your option) any later version.                      |
        |                                                                             |
        | This program is distributed in the hope that it will be useful,             |
        | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
        | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
        | GNU General Public License for more details.                                |
        |                                                                             |
        | You should have received a copy of the GNU General Public License           |
        | along with this program; if not, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/
 
include_once './Services/Calendar/classes/class.ilCalendarAuthenticationToken.php';
 
class ilCalendarRemoteAccessHandler
{
        private $token_handler = null;  
 
        public function __construct()
        {
        }
        
        public function getTokenHandler()
        {
                return $this->token_handler;
        }
        
        public function parseRequest()
        {
                if($_GET['client_id'])
                {
                        $_COOKIE['ilClientId'] = $_GET['client_id'];
                        
                }
                else
                {
                        $path_info_components = explode('/',$_SERVER['PATH_INFO']);
                        $_COOKIE['ilClientId'] = $path_info_components[1];
                }
        }
        
        public function handleRequest()
        {
                session_name('ILCALSESSID');
                $this->initIlias();
                $logger = $GLOBALS['DIC']->logger()->cal();
                $this->initTokenHandler();
                
                if(!$this->initUser())
                {
                        $logger->warning('Calendar token is invalid. Authentication failed.');
                        return false;
                }
                
                if($this->getTokenHandler()->getIcal() and !$this->getTokenHandler()->isIcalExpired())
                {
                        $GLOBALS['DIC']['ilAuthSession']->logout();
                        ilUtil::deliverData($this->getTokenHandler(),'calendar.ics','text/calendar','utf-8');
                        exit;
                }
                
                include_once './Services/Calendar/classes/Export/class.ilCalendarExport.php';
                include_once './Services/Calendar/classes/class.ilCalendarCategories.php';
                if($this->getTokenHandler()->getSelectionType() == ilCalendarAuthenticationToken::SELECTION_CALENDAR)
                {
                        $cats = ilCalendarCategories::_getInstance();
                        $cats->initialize(ilCalendarCategories::MODE_REMOTE_SELECTED, $this->getTokenHandler()->getCalendar());
                        $logger->dump($cats->getCategories(true), ilLogLevel::DEBUG);
                        $export = new ilCalendarExport($cats->getCategories(true));
                }
                else
                {
                        $cats = ilCalendarCategories::_getInstance();
                        $cats->initialize(ilCalendarCategories::MODE_REMOTE_ACCESS);
                        $logger->dump($cats->getCategories(true), ilLogLevel::DEBUG);
                        $export = new ilCalendarExport($cats->getCategories(true));
                }
                
                $export->export();
        
                $this->getTokenHandler()->setIcal($export->getExportString());
                $this->getTokenHandler()->storeIcal();
 
                $GLOBALS['DIC']['ilAuthSession']->logout();
                ilUtil::deliverData($export->getExportString(),'calendar.ics','text/calendar','utf-8');
                exit;
        }
        
        protected function initTokenHandler()
        {
                $GLOBALS['DIC']->logger()->cal()->info('Authentication token: ' .  $_GET['token']);
                $this->token_handler = new ilCalendarAuthenticationToken(
                        ilCalendarAuthenticationToken::lookupUser($_GET['token']),
                        $_GET['token']
                );
                return true;
        }
        
        protected function initIlias()
        {
                include_once "Services/Context/classes/class.ilContext.php";
                ilContext::init(ilContext::CONTEXT_ICAL);
                
                include_once './Services/Authentication/classes/class.ilAuthFactory.php';
                ilAuthFactory::setContext(ilAuthFactory::CONTEXT_CALENDAR_TOKEN);
                
                require_once("Services/Init/classes/class.ilInitialisation.php");
                ilInitialisation::initILIAS();
                
                $GLOBALS['lng']->loadLanguageModule('dateplaner');
        }
        
        protected function initUser()
        {
                if(!$this->getTokenHandler() instanceof ilCalendarAuthenticationToken)
                {
                        $GLOBALS['DIC']->logger()->cal()->info('Initialisation of authentication token failed');
                        return false;
                }
                if(!$this->getTokenHandler()->getUserId())
                {
                        $GLOBALS['DIC']->logger()->cal()->info('No user id found for calendar synchronisation');
                        return false;
                }
                include_once './Services/User/classes/class.ilObjUser.php';
                if(!ilObjUser::_exists($this->getTokenHandler()->getUserId()))
                {
                        $GLOBALS['DIC']->logger()->cal()->notice('No valid user id found for calendar synchronisation');
                        return false;
                }
                
                include_once './Services/Init/classes/class.ilInitialisation.php';
                $GLOBALS['DIC']['ilAuthSession']->setAuthenticated(true, $this->getTokenHandler()->getUserId());
                ilInitialisation::initUserAccount();
                
                if(!$GLOBALS['DIC']->user() instanceof ilObjUser)
                {
                        $GLOBALS['DIC']->logger()->cal()->debug('no user object defined');
                }
                else
                {
                        $GLOBALS['DIC']->logger()->cal()->debug('Current user is: ' . $GLOBALS['DIC']->user()->getId());
                }
                return true;
        }
}
?>