/**
* @see EntityRedirectLookup::getRedirectForEntityId
*
* @since 0.5
*
* @param EntityId $entityId
* @param string $forUpdate
*
* @return EntityId|null The ID of the redirect target, or null if $entityId
* does not refer to a redirect
* @throws EntityRedirectLookupException
*/
public function getRedirectForEntityId(EntityId $entityId, $forUpdate = '')
{
try {
$title = $this->entityTitleLookup->getTitleForId($entityId);
} catch (\Exception $ex) {
// TODO: catch more specific type of exception once EntityTitleLookup contract is clarified
throw new EntityRedirectLookupException($entityId, null, $ex);
}
$forUpdate = $forUpdate === 'for update' ? DB_MASTER : DB_SLAVE;
try {
$db = $this->loadBalancer->getConnection($forUpdate);
} catch (MWException $ex) {
throw new EntityRedirectLookupException($entityId, null, $ex);
}
$row = $db->selectRow(array('page', 'redirect'), array('page_id', 'rd_namespace', 'rd_title'), array('page_title' => $title->getDBkey(), 'page_namespace' => $title->getNamespace()), __METHOD__, array(), array('redirect' => array('LEFT JOIN', 'rd_from=page_id')));
try {
$this->loadBalancer->reuseConnection($db);
} catch (MWException $ex) {
throw new EntityRedirectLookupException($entityId, null, $ex);
}
if (!$row) {
throw new EntityRedirectLookupException($entityId);
}
if ($row->rd_namespace === null) {
return null;
}
$title = Title::makeTitle($row->rd_namespace, $row->rd_title);
return $this->entityIdLookup->getEntityIdForTitle($title);
}
/**
* @param ChangesList $list
* @param ResultWrapper|array $rows
*
* @return bool
*/
public function doChangesListInitRows(ChangesList $list, $rows)
{
try {
$titles = $this->getChangedTitles($rows);
$entityIds = $this->idLookup->getEntityIds($titles);
$this->buffer->prefetchTerms($entityIds, $this->termTypes, $this->languageCodes);
} catch (StorageException $ex) {
wfLogWarning(__METHOD__ . ': ' . $ex->getMessage());
}
return true;
}
/**
* @param Title $target
* @param string &$html
* @param array &$customAttribs
* @param RequestContext $context
*/
public function doOnLinkBegin(Title $target, &$html, array &$customAttribs, RequestContext $context)
{
$out = $context->getOutput();
if (!$this->entityNamespaceLookup->isEntityNamespace($target->getNamespace())) {
return;
}
// Only continue on pages with edit summaries (histories / diffs) or on special pages.
// Don't run this code when accessing it through the api (eg. for parsing) as the title is
// set to a special page dummy in api.php, see https://phabricator.wikimedia.org/T111346
if (defined('MW_API') || !$this->shouldConvert($out->getTitle(), $context)) {
return;
}
$targetText = $target->getText();
// Handle "fake" titles for new entities as generated by
// EditEntity::getContextForEditFilter(). For instance, a link to Property:NewProperty
// would be replaced by a link to Special:NewProperty. This is useful in logs,
// to indicate that the logged action occurred while creating an entity.
if (SpecialPageFactory::exists($targetText)) {
$target = Title::makeTitle(NS_SPECIAL, $targetText);
$html = Linker::linkKnown($target);
return;
}
if (!$target->exists()) {
// The link points to a non-existing item.
return;
}
// if custom link text is given, there is no point in overwriting it
// but not if it is similar to the plain title
if ($html !== null && $target->getFullText() !== $html) {
return;
}
$entityId = $this->entityIdLookup->getEntityIdForTitle($target);
if (!$entityId) {
return;
}
// @todo: this re-implements the logic in LanguageFallbackLabelDescriptionLookup,
// as that didn't support descriptions back when this code was written.
// NOTE: keep in sync with with fallback languages in LabelPrefetchHookHandler::newFromGlobalState
try {
$labels = $this->termLookup->getLabels($entityId, $this->languageFallback->getFetchLanguageCodes());
$descriptions = $this->termLookup->getDescriptions($entityId, $this->languageFallback->getFetchLanguageCodes());
} catch (StorageException $ex) {
// This shouldn't happen if $target->exists() return true!
return;
}
$labelData = $this->getPreferredTerm($labels);
$descriptionData = $this->getPreferredTerm($descriptions);
$html = $this->getHtml($target, $labelData);
$customAttribs['title'] = $this->getTitleAttribute($target, $labelData, $descriptionData);
// add wikibase styles in all cases, so we can format the link properly:
$out->addModuleStyles(array('wikibase.common'));
}
/**
* @param Title[] $titles
* @param int|null $continue
*
* @return array
*/
private function getEntityIdsForTitles(array $titles, $continue = 0)
{
$entityIds = $this->idLookup->getEntityIds($titles);
// Re-sort, so the order of page IDs matches the order in which $titles
// were given. This is essential for paging to work properly.
// This also skips all page IDs up to $continue.
$sortedEntityId = array();
foreach ($titles as $pid => $title) {
if ($pid >= $continue && isset($entityIds[$pid])) {
$sortedEntityId[$pid] = $entityIds[$pid];
}
}
return $sortedEntityId;
}
