/**
* Ensure that BasePage is valid:
* For New pages BasePage is set to their URLSegment. If URLSegment of page is changed this is updated.
* If URLSegment doesn't exist (page deleted e.g.) it is updated to URLSegment of current page.
*/
function onBeforeWrite()
{
if (!$this->owner->ID) {
$this->owner->BasePage = $this->owner->URLSegment;
} else {
if ($this->owner->BasePage != null) {
$storedData = Page::get_by_id('Page', $this->owner->ID);
if (isset($storedData->BasePage) && ($storedData->BasePage != $this->owner->BasePage || $storedData->URLSegment != $this->owner->URLSegment) && $storedData->BasePage == $storedData->URLSegment) {
$this->owner->BasePage = $this->owner->URLSegment;
} else {
$basePageSQL = Convert::raw2sql($this->owner->BasePage);
$pageExists = DataObject::get_one('Page', "URLSegment = '{$basePageSQL}'");
if (!$pageExists) {
$this->owner->BasePage = $this->owner->URLSegment;
}
}
}
}
parent::onBeforeWrite();
}
