/**
* Convenience method to find the redirect target of an SMWDIWikiPage
* or SMWDIProperty object. Returns a dataitem of the same type that
* the input redirects to, or the input itself if there is no redirect.
*
* @param $dataItem SMWDataItem to find the redirect for.
* @return SMWDataItem
*/
public function getRedirectTarget(SMWDataItem $dataItem)
{
if ($dataItem->getDIType() == SMWDataItem::TYPE_PROPERTY) {
if (!$dataItem->isUserDefined()) {
return $dataItem;
}
$wikipage = $dataItem->getDiWikiPage();
} elseif ($dataItem->getDIType() == SMWDataItem::TYPE_WIKIPAGE) {
$wikipage = $dataItem;
} else {
throw new InvalidArgumentException('SMWStore::getRedirectTarget() expects an object of type SMWDIProperty or SMWDIWikiPage.');
}
$redirectDataItems = $this->getPropertyValues($wikipage, new SMWDIProperty('_REDI'));
if (count($redirectDataItems) > 0) {
if ($dataItem->getDIType() == SMWDataItem::TYPE_PROPERTY) {
return new SMWDIProperty(end($redirectDataItems)->getDBkey());
} else {
return end($redirectDataItems);
}
} else {
return $dataItem;
}
}
