/**
* Checks routing access for the node revision.
*
* @param \Symfony\Component\Routing\Route $route
* The route to check against.
* @param \Drupal\Core\Session\AccountInterface $account
* The currently logged in account.
* @param int $node_revision
* (optional) The node revision ID. If not specified, but $node is, access
* is checked for that object's revision.
* @param \Drupal\node\NodeInterface $node
* (optional) A node object. Used for checking access to a node's default
* revision when $node_revision is unspecified. Ignored when $node_revision
* is specified. If neither $node_revision nor $node are specified, then
* access is denied.
*
* @return \Drupal\Core\Access\AccessResultInterface
* The access result.
*/
public function access(Route $route, AccountInterface $account, $node_revision = NULL, NodeInterface $node = NULL)
{
if ($node_revision) {
$node = $this->nodeStorage->loadRevision($node_revision);
}
$operation = $route->getRequirement('_access_node_revision');
return AccessResult::allowedIf($node && $this->checkAccess($node, $account, $operation))->cachePerPermissions();
}
