/**
* Handle the onDataChanged hook of SMW >1.6, which gets called
* every time the value of a propery changes somewhere.
*
* @since 0.1
*
* @param SMWStore $store
* @param SMWChangeSet $changes
*
* @return true
*/
public static function onDataUpdate( SMWStore $store, SMWSemanticData $newData ) {
$subject = $newData->getSubject();
$oldData = $store->getSemanticData( $subject );
$title = Title::makeTitle( $subject->getNamespace(), $subject->getDBkey() );
$groups = SWLGroups::getMatchingWatchGroups( $title );
$edit = false;
foreach ( $groups as /* SWLGroup */ $group ) {
$changeSet = SWLChangeSet::newFromSemanticData( $oldData, $newData, $group->getProperties() );
if ( $changeSet->hasUserDefinedProperties() ) {
if ( $edit === false ) {
$edit = new SWLEdit(
$title->getArticleID(),
$GLOBALS['wgUser']->getName(),
wfTimestampNow()
);
$edit->writeToDB();
}
$changeSet->setEdit( $edit );
$setId = $changeSet->writeToStore( $groups, $edit->getId() );
if ( $setId != 0 ) {
$group->notifyWatchingUsers( $changeSet );
}
}
}
return true;
}
