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export_execute.php
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<?php // $Id$
require_once('../config.php');
//require_once($CFG->dirroot.'/course/lib.php');
require_once($CFG->dirroot.'/calendar/lib.php');
require_once($CFG->libdir.'/bennu/bennu.inc.php');
$username = required_param('username', PARAM_TEXT);
$authtoken = required_param('authtoken', PARAM_ALPHANUM);
//Fetch user information
if (!$user = get_complete_user_data('username', $username)) {
//No such user
die("No such user '$username'");
}
//Check authentication token
if ($authtoken != sha1($username . $user->password)) {
die('Invalid authentication token');
}
$what = optional_param('preset_what', '', PARAM_ALPHA);
$time = optional_param('preset_time', '', PARAM_ALPHA);
$now = usergetdate(time());
// Let's see if we have sufficient and correct data
$allowed_what = array('all', 'courses');
$allowed_time = array('weeknow', 'weeknext', 'monthnow', 'monthnext', 'recentupcoming');
if(!empty($what) && !empty($time)) {
if(in_array($what, $allowed_what) && in_array($time, $allowed_time)) {
$courses = get_my_courses($user->id);
$include_user = ($what == 'all');
if ($include_user) {
//Also include site (global) events
$courses[SITEID] = new stdClass;
$courses[SITEID]->shortname = get_string('globalevents', 'calendar');
}
switch($time) {
case 'weeknow':
$startweekday = get_user_preferences('calendar_startwday', CALENDAR_STARTING_WEEKDAY);
$startmonthday = find_day_in_month($now['mday'] - 6, $startweekday, $now['mon'], $now['year']);
$startmonth = $now['mon'];
$startyear = $now['year'];
if($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
$startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
}
$timestart = make_timestamp($startyear, $startmonth, $startmonthday);
$endmonthday = $startmonthday + 7;
$endmonth = $startmonth;
$endyear = $startyear;
if($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
$endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
}
$timeend = make_timestamp($endyear, $endmonth, $endmonthday) - 1;
break;
case 'weeknext':
$startweekday = get_user_preferences('calendar_startwday', CALENDAR_STARTING_WEEKDAY);
$startmonthday = find_day_in_month($now['mday'] + 1, $startweekday, $now['mon'], $now['year']);
$startmonth = $now['mon'];
$startyear = $now['year'];
if($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
$startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
}
$timestart = make_timestamp($startyear, $startmonth, $startmonthday);
$endmonthday = $startmonthday + 7;
$endmonth = $startmonth;
$endyear = $startyear;
if($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
$endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
}
$timeend = make_timestamp($endyear, $endmonth, $endmonthday) - 1;
break;
case 'monthnow':
$timestart = make_timestamp($now['year'], $now['mon'], 1);
$timeend = make_timestamp($now['year'], $now['mon'], calendar_days_in_month($now['mon'], $now['year']), 23, 59, 59);
break;
case 'monthnext':
list($nextmonth, $nextyear) = calendar_add_month($now['mon'], $now['year']);
$timestart = make_timestamp($nextyear, $nextmonth, 1);
$timeend = make_timestamp($nextyear, $nextmonth, calendar_days_in_month($nextmonth, $nextyear), 23, 59, 59);
break;
case 'recentupcoming':
//Events in the last 5 or next 60 days
$timestart = time() - 432000;
$timeend = time() + 5184000;
break;
}
}
else {
// Parameters given but incorrect, redirect back to export page
redirect($CFG->wwwroot.'/calendar/export.php');
die();
}
}
$whereclause = calendar_sql_where($timestart, $timeend, $include_user ? array($user->id) : false, false, array_keys($courses), false);
if($whereclause === false) {
$events = array();
}
else {
$events = get_records_select('event', $whereclause, 'timestart');
}
if ($events === false) {
$events = array();
}
$ical = new iCalendar;
$ical->add_property('method', 'PUBLISH');
foreach($events as $event) {
$ev = new iCalendar_event;
$ev->add_property('summary', $event->name);
$ev->add_property('description', $event->description);
$ev->add_property('class', 'PUBLIC'); // PUBLIC / PRIVATE / CONFIDENTIAL
$ev->add_property('last-modified', Bennu::timestamp_to_datetime($event->timemodified));
$ev->add_property('dtstamp', Bennu::timestamp_to_datetime()); // now
$ev->add_property('dtstart', Bennu::timestamp_to_datetime($event->timestart)); // when event starts
if ($event->timeduration > 0) {
//dtend is better than duration, because it works in Microsoft Outlook and works better in Korganizer
$ev->add_property('dtend', Bennu::timestamp_to_datetime($event->timestart + $event->timeduration));
}
if ($event->courseid != 0) {
$ev->add_property('categories', $courses[$event->courseid]->shortname);
}
$ical->add_component($ev);
}
$serialized = $ical->serialize();
if(empty($serialized)) {
// TODO
die('bad serialization');
}
//IE compatibility HACK!
if(ini_get('zlib.output_compression')) {
ini_set('zlib.output_compression', 'Off');
}
$filename = 'icalexport.ics';
header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
header('Expires: '. gmdate('D, d M Y H:i:s', 0) .'GMT');
header('Pragma: no-cache');
header('Accept-Ranges: none'); // Comment out if PDFs do not work...
header('Content-disposition: attachment; filename='.$filename);
header('Content-length: '.strlen($serialized));
header('Content-type: text/calendar');
echo $serialized;
?>