/calendar/export_execute.php
PHP | 252 lines | 197 code | 28 blank | 27 comment | 45 complexity | 4006e3fb8bce639adcfa2a5961596892 MD5 | raw file
- <?php
- 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');
- $userid = optional_param('userid', 0, PARAM_INT);
- $username = optional_param('username', '', PARAM_TEXT);
- $authtoken = required_param('authtoken', PARAM_ALPHANUM);
- $generateurl = optional_param('generateurl', '', PARAM_TEXT);
- if (empty($CFG->enablecalendarexport)) {
- die('no export');
- }
- //Fetch user information
- $checkuserid = !empty($userid) && $user = $DB->get_record('user', array('id' => $userid), 'id,password');
- //allowing for fallback check of old url - MDL-27542
- $checkusername = !empty($username) && $user = $DB->get_record('user', array('username' => $username), 'id,password');
- if (!$checkuserid && !$checkusername) {
- //No such user
- die('Invalid authentication');
- }
- //Check authentication token
- $authuserid = !empty($userid) && $authtoken == sha1($userid . $user->password . $CFG->calendar_exportsalt);
- //allowing for fallback check of old url - MDL-27542
- $authusername = !empty($username) && $authtoken == sha1($username . $user->password . $CFG->calendar_exportsalt);
- if (!$authuserid && !$authusername) {
- die('Invalid authentication');
- }
- // Get the calendar type we are using.
- $calendartype = \core_calendar\type_factory::get_calendar_instance();
- $what = optional_param('preset_what', 'all', PARAM_ALPHA);
- $time = optional_param('preset_time', 'weeknow', PARAM_ALPHA);
- $now = $calendartype->timestamp_to_date_array(time());
- // Let's see if we have sufficient and correct data
- $allowed_what = array('all', 'user', 'groups', 'courses');
- $allowed_time = array('weeknow', 'weeknext', 'monthnow', 'monthnext', 'recentupcoming', 'custom');
- if (!empty($generateurl)) {
- $authtoken = sha1($user->id . $user->password . $CFG->calendar_exportsalt);
- $params = array();
- $params['preset_what'] = $what;
- $params['preset_time'] = $time;
- $params['userid'] = $userid;
- $params['authtoken'] = $authtoken;
- $params['generateurl'] = true;
- $link = new moodle_url('/calendar/export.php', $params);
- redirect($link->out());
- die;
- }
- if(!empty($what) && !empty($time)) {
- if(in_array($what, $allowed_what) && in_array($time, $allowed_time)) {
- $courses = enrol_get_users_courses($user->id, true, 'id, visible, shortname');
- // Array of courses that we will pass to calendar_get_legacy_events() which
- // is initially set to the list of the user's courses.
- $paramcourses = $courses;
- if ($what == 'all' || $what == 'groups') {
- $groups = array();
- foreach ($courses as $course) {
- $course_groups = groups_get_all_groups($course->id, $user->id);
- $groups = array_merge($groups, array_keys($course_groups));
- }
- if (empty($groups)) {
- $groups = false;
- }
- }
- if ($what == 'all') {
- $users = $user->id;
- $courses[SITEID] = new stdClass;
- $courses[SITEID]->shortname = get_string('globalevents', 'calendar');
- $paramcourses[SITEID] = $courses[SITEID];
- } else if ($what == 'groups') {
- $users = false;
- $paramcourses = array();
- } else if ($what == 'user') {
- $users = $user->id;
- $groups = false;
- $paramcourses = array();
- } else {
- $users = false;
- $groups = false;
- }
- // Store the number of days in the week.
- $numberofdaysinweek = $calendartype->get_num_weekdays();
- switch($time) {
- case 'weeknow':
- $startweekday = calendar_get_starting_weekday();
- $startmonthday = find_day_in_month($now['mday'] - ($numberofdaysinweek - 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);
- }
- $gregoriandate = $calendartype->convert_to_gregorian($startyear, $startmonth, $startmonthday);
- $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
- $gregoriandate['hour'], $gregoriandate['minute']);
- $endmonthday = $startmonthday + $numberofdaysinweek;
- $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);
- }
- $gregoriandate = $calendartype->convert_to_gregorian($endyear, $endmonth, $endmonthday);
- $timeend = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
- $gregoriandate['hour'], $gregoriandate['minute']);
- break;
- case 'weeknext':
- $startweekday = calendar_get_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);
- }
- $gregoriandate = $calendartype->convert_to_gregorian($startyear, $startmonth, $startmonthday);
- $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
- $gregoriandate['hour'], $gregoriandate['minute']);
- $endmonthday = $startmonthday + $numberofdaysinweek;
- $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);
- }
- $gregoriandate = $calendartype->convert_to_gregorian($endyear, $endmonth, $endmonthday);
- $timeend = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
- $gregoriandate['hour'], $gregoriandate['minute']);
- break;
- case 'monthnow':
- // Convert to gregorian.
- $gregoriandate = $calendartype->convert_to_gregorian($now['year'], $now['mon'], 1);
- $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
- $gregoriandate['hour'], $gregoriandate['minute']);
- $timeend = $timestart + (calendar_days_in_month($now['mon'], $now['year']) * DAYSECS);
- break;
- case 'monthnext':
- // Get the next month for this calendar.
- list($nextmonth, $nextyear) = calendar_add_month($now['mon'], $now['year']);
- // Convert to gregorian.
- $gregoriandate = $calendartype->convert_to_gregorian($nextyear, $nextmonth, 1);
- // Create the timestamps.
- $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
- $gregoriandate['hour'], $gregoriandate['minute']);
- $timeend = $timestart + (calendar_days_in_month($nextmonth, $nextyear) * DAYSECS);
- break;
- case 'recentupcoming':
- //Events in the last 5 or next 60 days
- $timestart = time() - 432000;
- $timeend = time() + 5184000;
- break;
- case 'custom':
- // Events based on custom date range.
- $timestart = time() - $CFG->calendar_exportlookback * DAYSECS;
- $timeend = time() + $CFG->calendar_exportlookahead * DAYSECS;
- break;
- }
- }
- else {
- // Parameters given but incorrect, redirect back to export page
- redirect($CFG->wwwroot.'/calendar/export.php');
- die();
- }
- }
- $events = calendar_get_legacy_events($timestart, $timeend, $users, $groups, array_keys($paramcourses), false);
- $ical = new iCalendar;
- $ical->add_property('method', 'PUBLISH');
- $ical->add_property('prodid', '-//Moodle Pty Ltd//NONSGML Moodle Version ' . $CFG->version . '//EN');
- foreach($events as $event) {
- if (!empty($event->modulename)) {
- $instances = get_fast_modinfo($event->courseid, $userid)->get_instances_of($event->modulename);
- if (empty($instances[$event->instance]->uservisible)) {
- continue;
- }
- }
- $hostaddress = str_replace('http://', '', $CFG->wwwroot);
- $hostaddress = str_replace('https://', '', $hostaddress);
- $me = new calendar_event($event); // To use moodle calendar event services.
- $ev = new iCalendar_event; // To export in ical format.
- $ev->add_property('uid', $event->id.'@'.$hostaddress);
- // Set iCal event summary from event name.
- $ev->add_property('summary', format_string($event->name, true, ['context' => $me->context]));
- // Format the description text.
- $description = format_text($me->description, $me->format, ['context' => $me->context]);
- // Then convert it to plain text, since it's the only format allowed for the event description property.
- // We use html_to_text in order to convert <br> and <p> tags to new line characters for descriptions in HTML format.
- $description = html_to_text($description, 0);
- $ev->add_property('description', $description);
- $ev->add_property('class', 'PUBLIC'); // PUBLIC / PRIVATE / CONFIDENTIAL
- $ev->add_property('last-modified', Bennu::timestamp_to_datetime($event->timemodified));
- $ev->add_property('dtstamp', Bennu::timestamp_to_datetime()); // now
- if ($event->timeduration > 0) {
- //dtend is better than duration, because it works in Microsoft Outlook and works better in Korganizer
- $ev->add_property('dtstart', Bennu::timestamp_to_datetime($event->timestart)); // when event starts.
- $ev->add_property('dtend', Bennu::timestamp_to_datetime($event->timestart + $event->timeduration));
- } else if ($event->timeduration == 0) {
- // When no duration is present, the event is instantaneous event, ex - Due date of a module.
- // Moodle doesn't support all day events yet. See MDL-56227.
- $ev->add_property('dtstart', Bennu::timestamp_to_datetime($event->timestart));
- $ev->add_property('dtend', Bennu::timestamp_to_datetime($event->timestart));
- } else {
- // This can be used to represent all day events in future.
- throw new coding_exception("Negative duration is not supported yet.");
- }
- if ($event->courseid != 0) {
- $coursecontext = context_course::instance($event->courseid);
- $ev->add_property('categories', format_string($courses[$event->courseid]->shortname, true, array('context' => $coursecontext)));
- }
- $ical->add_component($ev);
- }
- $serialized = $ical->serialize();
- if(empty($serialized)) {
- // TODO
- die('bad serialization');
- }
- $filename = 'icalexport.ics';
- header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
- header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
- header('Expires: '. gmdate('D, d M Y H:i:s', 0) .'GMT');
- header('Pragma: no-cache');
- header('Accept-Ranges: none'); // Comment out if PDFs do not work...
- header('Content-disposition: attachment; filename='.$filename);
- header('Content-length: '.strlen($serialized));
- header('Content-type: text/calendar; charset=utf-8');
- echo $serialized;