/**
* @param string[] $terms
* @param string[] $fetchLanguages
*
* @return TermFallback|null
*/
private function getTermFallback(array $terms, array $fetchLanguages)
{
$extractedData = $this->languageFallbackChain->extractPreferredValue($terms);
if ($extractedData === null) {
return null;
}
// $fetchLanguages are in order of preference
$requestLanguage = reset($fetchLanguages);
// see extractPreferredValue for array keys
return new TermFallback($requestLanguage, $extractedData['value'], $extractedData['language'], $extractedData['source']);
}
/**
* @param ParserOutput $parserOutput
* @param EntityDocument $entity
*/
private function addTitleTextToParserOutput(ParserOutput $parserOutput, EntityDocument $entity)
{
$titleText = null;
if ($entity instanceof FingerprintProvider) {
$labels = $entity->getFingerprint()->getLabels()->toTextArray();
$preferred = $this->languageFallbackChain->extractPreferredValue($labels);
if (is_array($preferred)) {
$titleText = $preferred['value'];
}
}
if (!is_string($titleText)) {
$entityId = $entity->getId();
if ($entityId instanceof EntityId) {
$titleText = $entityId->getSerialization();
}
}
$parserOutput->setExtensionData('wikibase-titletext', $titleText);
}
