/**
* @param PostRevision|PostSummary $object
* @param array $metadata
* @return string alphadecimal uuid
* @throws InvalidInputException When $object is not PostRevision or PostSummary
*/
protected function findTopicRootId($object, array $metadata)
{
if (isset($metadata['workflow']) && $metadata['workflow'] instanceof Workflow) {
return $metadata['workflow']->getId();
} elseif ($object instanceof PostRevision) {
return $object->getRootPost()->getPostId()->getAlphadecimal();
} elseif ($object instanceof PostSummary) {
return $object->getCollection()->getWorkflowId()->getAlphadecimal();
} else {
throw new InvalidInputException('Unexpected revision type: ' . get_class($object));
}
}
