<?php
/* For licensing terms, see /license.txt */
/**
 * This file exclusively export calendar items to iCal or similar formats
 * @author Yannick Warnier <yannick.warnier@dokeos.com>
 * See copyright information in the Dokeos root directory, dokeos_license.txt
 */
/**
 * Initialisation
 */
// name of the language file that needs to be included
$language_file = 'agenda';
// we are not inside a course, so we reset the course id
$cidReset = true;
// setting the global file that gets the general configuration, the databases, the languages, ...
require_once '../inc/global.inc.php';
$this_section = SECTION_MYAGENDA;
api_block_anonymous_users();

require_once api_get_path(LIBRARY_PATH).'groupmanager.lib.php';
require_once api_get_path(LIBRARY_PATH).'icalcreator/iCalcreator.class.php';
require_once api_get_path(SYS_CODE_PATH).'calendar/agenda.lib.php';

// setting the name of the tool
$nameTools = get_lang('MyAgenda');

// the variables for the days and the months
// Defining the shorts for the days
$DaysShort = api_get_week_days_short();
// Defining the days of the week to allow translation of the days
$DaysLong = api_get_week_days_long();
// Defining the months of the year to allow translation of the months
$MonthsLong = api_get_months_long();

if (empty($_GET['id'])) {
    api_not_allowed();
}

$id = explode('_', $_GET['id']);
$type = $id[0];
$id = $id[1];

$agenda = new Agenda();
$agenda->type = $type; //course,admin or personal
if (isset($_GET['course_id'])) {
    $course_info = api_get_course_info_by_id($_GET['course_id']);
    if (!empty($course_info)) {
        $agenda->set_course($course_info);
    }
}

$event = $agenda->get_event($id);

if (!empty($event)) {
	define('ICAL_LANG',api_get_language_isocode());
	
    $ical = new vcalendar();
    $ical->setConfig('unique_id',api_get_path(WEB_PATH));
    $ical->setProperty( 'method', 'PUBLISH' );
    $ical->setConfig('url',api_get_path(WEB_PATH));
    $vevent = new vevent();

    switch($_GET['class']) {
        case 'public':
            $vevent->setClass('PUBLIC');
            break;
        case 'private':
            $vevent->setClass('PRIVATE');
            break;
        case 'confidential':
            $vevent->setClass('CONFIDENTIAL');
            break;
        default:
            $vevent->setClass('PRIVATE');
            break;
    }
    
    $event['start_date'] = api_get_local_time($event['start_date']);
    $event['end_date'] = api_get_local_time($event['end_date']);
    
    
    
    switch($type) {
        case 'personal':        
        case 'platform':
            $vevent->setProperty( 'summary', api_convert_encoding($event['title'],'UTF-8', $charset));
            if(empty($event['start_date'])){header('location:'.Security::remove_XSS($_SERVER['HTTP_REFERER']));}
            list($y,$m,$d,$h,$M,$s) = preg_split('/[\s:-]/',$event['start_date']);
            $vevent->setProperty('dtstart',array('year'=>$y,'month'=>$m,'day'=>$d,'hour'=>$h,'min'=>$M,'sec'=>$s));
            if(empty($event['end_date'])) {
                $y2=$y;$m2=$m;$d2=$d;$h2=$h;$M2=$M+15;$s2=$s;
                if($M2>60){$M2=$M2-60;$h2+=1;}
            } else {
                list($y2,$m2,$d2,$h2,$M2,$s2) = preg_split('/[\s:-]/',$event['end_date']);
            }
            $vevent->setProperty('dtend',array('year'=>$y2,'month'=>$m2,'day'=>$d2,'hour'=>$h2,'min'=>$M2,'sec'=>$s2));
            //$vevent->setProperty( 'LOCATION', get_lang('Unknown') ); // property name - case independent
            $vevent->setProperty( 'description', api_convert_encoding($event['description'],'UTF-8',$charset));
            //$vevent->setProperty( 'comment', 'This is a comment' );
            //$user = api_get_user_info($event['user']);
            //$vevent->setProperty('organizer',$user['mail']);
            //$vevent->setProperty('attendee',$user['mail']);
            //$vevent->setProperty( 'rrule', array( 'FREQ' => 'WEEKLY', 'count' => 4));// occurs also four next weeks
            $ical->setConfig('filename',$y.$m.$d.$h.$M.$s.'-'.rand(1,1000).'.ics');
            $ical->setComponent ($vevent); // add event to calendar
            $ical->returnCalendar();
            break;
        case 'course':            
            $vevent->setProperty( 'summary', api_convert_encoding($event['title'],'UTF-8',$charset));
            if(empty($event['start_date'])){header('location:'.Security::remove_XSS($_SERVER['HTTP_REFERER']));}
            list($y,$m,$d,$h,$M,$s) = preg_split('/[\s:-]/',$event['start_date']);
            $vevent->setProperty('dtstart',array('year'=>$y,'month'=>$m,'day'=>$d,'hour'=>$h,'min'=>$M,'sec'=>$s));
            if (empty($event['end_date'])) {
                $y2=$y;$m2=$m;$d2=$d;$h2=$h;$M2=$M+15;$s2=$s;
                if($M2>60){$M2=$M2-60;$h2+=1;}
            } else {
                list($y2,$m2,$d2,$h2,$M2,$s2) = preg_split('/[\s:-]/',$event['end_date']);
            }
            $vevent->setProperty('dtend',array('year'=>$y2,'month'=>$m2,'day'=>$d2,'hour'=>$h2,'min'=>$M2,'sec'=>$s2));
            $vevent->setProperty( 'description', api_convert_encoding($event['description'],'UTF-8',$charset));
            //$vevent->setProperty( 'comment', 'This is a comment' );
            //$user = api_get_user_info($event['user']);
            //$vevent->setProperty('organizer',$user['mail']);
            //$vevent->setProperty('attendee',$user['mail']);
            //$course = api_get_course_info();
            $vevent->setProperty('location', $course_info['name']); // property name - case independent
            /*if($ai['repeat']) {
                $trans = array('daily'=>'DAILY','weekly'=>'WEEKLY','monthlyByDate'=>'MONTHLY','yearly'=>'YEARLY');
                $freq = $trans[$ai['repeat_type']];
                list($e_y,$e_m,$e_d) = split('/',date('Y/m/d',$ai['repeat_end']));
                $vevent->setProperty('rrule',array('FREQ'=>$freq,'UNTIL'=>array('year'=>$e_y,'month'=>$e_m,'day'=>$e_d),'INTERVAL'=>'1'));
            }*/
            //$vevent->setProperty( 'rrule', array( 'FREQ' => 'WEEKLY', 'count' => 4));// occurs also four next weeks
            $ical->setConfig('filename',$y.$m.$d.$h.$M.$s.'-'.rand(1,1000).'.ics');
            $ical->setComponent ($vevent); // add event to calendar
            $ical->returnCalendar();
            break;
        default:
            header('location:'.Security::remove_XSS($_SERVER['HTTP_REFERER']));
            die();
    }	
} else {
	header('location:'.Security::remove_XSS($_SERVER['HTTP_REFERER']));
	die();
}