protected function addExistingNodeVariantInformationToResponse($identifier, ContentContext $context)
{
$nodeVariants = $context->getNodeVariantsByIdentifier($identifier);
if (count($nodeVariants) > 0) {
$this->response->setHeader('X-Neos-Node-Exists-In-Other-Dimensions', true);
// If the node exists in another dimension, we want to know how many nodes in the rootline are also missing for the target
// dimension. This is needed in the UI to tell the user if nodes will be materialized recursively upwards in the rootline.
// To find the node path for the given identifier, we just use the first result. This is a safe assumption at least for
// "Document" nodes (aggregate=TRUE), because they are always moved in-sync.
$node = reset($nodeVariants);
/** @var NodeInterface $node */
if ($node->getNodeType()->isAggregate()) {
$pathSegmentsToSites = NodePaths::getPathDepth(SiteService::SITES_ROOT_PATH);
$pathSegmentsToNodeVariant = NodePaths::getPathDepth($node->getPath());
// Segments between the sites root "/sites" and the node variant (minimum 1)
$pathSegments = $pathSegmentsToNodeVariant - $pathSegmentsToSites;
// Nodes between (and including) the site root node and the node variant (minimum 1)
$siteNodePath = NodePaths::addNodePathSegment(SiteService::SITES_ROOT_PATH, $context->getCurrentSite()->getNodeName());
$nodes = $context->getNodesOnPath($siteNodePath, $node->getPath());
$missingNodesOnRootline = $pathSegments - count($nodes);
if ($missingNodesOnRootline > 0) {
$this->response->setHeader('X-Neos-Nodes-Missing-On-Rootline', $missingNodesOnRootline);
}
}
}
}
