/**
* Returns calendar for event
*
* @return object
*/
public function calendar()
{
return Calendar::getInstance($this->get('calendar_id'));
}
/**
* Method to refresh Group Calendar
*/
private function refreshCalendar()
{
//get the passed in event id
$calendarId = Request::getVar('calendar_id', '');
// get the calendar
$calendar = \Components\Events\Models\Calendar::getInstance($calendarId);
// refresh Calendar (force refresh even if we dont need to yet)
if (!$calendar->refresh(true)) {
$this->setError(Lang::txt('Unable to sync the group calendar "%s". Please verify the calendar subscription URL is valid.', $calendar->getError()));
return $this->calendars();
}
//inform and redirect
App::redirect(Route::url('index.php?option=' . $this->option . '&cn=' . $this->group->get('cn') . '&active=calendar&action=calendars'), Lang::txt('You have successfully refreshed the calendar.'), 'passed');
}
/**
* Subscribe to group calendars
*
* @return void
*/
public function subscribe($name = 'Calendar Subscription', $scope = 'event', $scope_id = null)
{
// get request varse
$calendarIds = Request::getVar('calendar_id', '', 'get');
$calendarIds = array_map("intval", explode(',', $calendarIds));
// array to hold events
$events = new ItemList();
// loop through and get each calendar
foreach ($calendarIds as $k => $calendarId) {
// load calendar model
$eventsCalendar = new Calendar($calendarId);
// make sure calendar is published
if (!$eventsCalendar->get('published') && $calendarId != 0) {
continue;
}
// get calendar events
$rawEvents = $eventsCalendar->events('list', array('scope' => $scope, 'scope_id' => $scope_id, 'calendar_id' => $calendarId, 'state' => array(1)));
// merge with full events list
$events = $events->merge($rawEvents);
}
//create output
$output = "BEGIN:VCALENDAR\r\n";
$output .= "VERSION:2.0\r\n";
$output .= "PRODID:PHP\r\n";
$output .= "METHOD:PUBLISH\r\n";
$output .= "X-WR-CALNAME;VALUE=TEXT:" . $name . "\r\n";
$output .= "X-PUBLISHED-TTL:PT15M\r\n";
$output .= "X-ORIGINAL-URL:https://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] . "\r\n";
$output .= "CALSCALE:GREGORIAN\r\n";
// get daylight start and end
$ttz = new DateTimezone(timezone_name_from_abbr('EST'));
$first = Date::of(date('Y') . '-01-02 00:00:00')->toUnix();
$last = Date::of(date('Y') . '-12-30 00:00:00')->toUnix();
$transitions = $ttz->getTransitions($first, $last);
$daylightStart = Date::of($transitions[1]['ts']);
$daylightEnd = Date::of($transitions[2]['ts']);
// output timezone block
$output .= "BEGIN:VTIMEZONE\r\n";
$output .= "TZID:America/New_York\r\n";
$output .= "X-LIC-LOCATION:America/New_York\r\n";
$output .= "BEGIN:DAYLIGHT\r\n";
$output .= "TZNAME:Daylight\r\n";
$output .= "RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=2SU;BYMONTH=3\r\n";
$output .= "TZOFFSETFROM:-0500\r\n";
$output .= "TZOFFSETTO:-0400\r\n";
$output .= "DTSTART:" . $daylightStart->format('Ymd\\THis') . "\r\n";
$output .= "END:DAYLIGHT\r\n";
$output .= "BEGIN:STANDARD\r\n";
$output .= "TZNAME:Standard\r\n";
$output .= "RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=11\r\n";
$output .= "TZOFFSETFROM:-0400\r\n";
$output .= "TZOFFSETTO:-0500\r\n";
$output .= "DTSTART:" . $daylightEnd->format('Ymd\\THis') . "\r\n";
$output .= "END:STANDARD\r\n";
$output .= "END:VTIMEZONE\r\n";
// loop through events
foreach ($events as $event) {
$sequence = 0;
$uid = $event->get('id') . '@' . $_SERVER['HTTP_HOST'];
$title = $event->get('title');
$content = str_replace("\r\n", '\\n', $event->get('content'));
$location = $event->get('adresse_info');
$url = $event->get('extra_info');
// get event timezone setting
// use this in "DTSTART;TZID="
$tzInfo = \plgGroupsCalendarHelper::getTimezoneNameAndAbbreviation($event->get('time_zone'));
$tzName = timezone_name_from_abbr($tzInfo['abbreviation']);
// get publish up/down dates in UTC
$publishUp = new DateTime($event->get('publish_up'), new DateTimezone('UTC'));
$publishDown = new DateTime($event->get('publish_down'), new DateTimezone('UTC'));
// Set eastern timezone as publish up/down date timezones
// since all event date/times are stores relative to eastern
// ----------------------------------------------------------------------------------
// The timezone param "DTSTART;TZID=" defined above will allow a users calendar app to
// adjust date/time display according to that timezone and their systems timezone setting
$publishUp->setTimezone(new DateTimezone(timezone_name_from_abbr('EST')));
$publishDown->setTimezone(new DateTimezone(timezone_name_from_abbr('EST')));
// create now, created, and modified vars
$now = gmdate('Ymd') . 'T' . gmdate('His') . 'Z';
$created = gmdate('Ymd', strtotime($event->get('created'))) . 'T' . gmdate('His', strtotime($event->get('created'))) . 'Z';
$modified = gmdate('Ymd', strtotime($event->get('modified'))) . 'T' . gmdate('His', strtotime($event->get('modified'))) . 'Z';
// start output
$output .= "BEGIN:VEVENT\r\n";
$output .= "UID:{$uid}\r\n";
$output .= "SEQUENCE:{$sequence}\r\n";
$output .= "DTSTAMP:{$now}\r\n";
$output .= "DTSTART;TZID={$tzName}:" . $publishUp->format('Ymd\\THis') . "\r\n";
if ($event->get('publish_down') != '' && $event->get('publish_down') != '0000-00-00 00:00:00') {
$output .= "DTEND;TZID={$tzName}:" . $publishDown->format('Ymd\\THis') . "\r\n";
} else {
$output .= "DTEND;TZID={$tzName}:" . $publishUp->format('Ymd\\THis') . "\r\n";
}
// repeating rule
if ($event->get('repeating_rule') != '') {
$output .= "RRULE:" . $event->get('repeating_rule') . "\r\n";
}
$output .= "CREATED:{$created}\r\n";
$output .= "LAST-MODIFIED:{$modified}\r\n";
$output .= "SUMMARY:{$title}\r\n";
$output .= "DESCRIPTION:{$content}\r\n";
// do we have extra info
if ($url != '' && filter_var($url, FILTER_VALIDATE_URL)) {
$output .= "URL;VALUE=URI:{$url}\r\n";
}
// do we have a location
if ($location != '') {
$output .= "LOCATION:{$location}\r\n";
}
$output .= "END:VEVENT\r\n";
}
// close calendar
$output .= "END:VCALENDAR";
// set headers and output
header('Content-type: text/calendar; charset=utf-8');
header('Content-Disposition: attachment; filename="' . $name . '.ics"');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
echo $output;
exit;
}
