public function onBeforeWrite()
{
parent::onBeforeWrite();
// Make sure a valid date range is entered
if (DateTime::createFromFormat('Y-m-d', $this->StartDate) > DateTime::createFromFormat('Y-m-d', $this->EndDate)) {
throw new ValidationException("End date cannot occur before start date");
}
// Make sure something is set...
if ($this->ShortDescription === "") {
$this->ShortDescription = "(No description set)";
}
// Write the ics file for the event
$service = new IcsGenerator($this->Title);
$service->generateEventList(null, $this->ID);
// Attach the file to this page
$this->CalFileID = $service->getFileObject()->ID;
$this->CalFileURL = $service->getFileObject()->getURL();
}
