public function RequestTree::getDescendant in Subrequests 8

Find a request in a tree based on the request ID.

Parameters

string $request_id: The unique ID of a request in the blueprint to find in this tree.

Return value

\Symfony\Component\HttpFoundation\Request|NULL $request The request if found. NULL if not found.

File

src/Blueprint/RequestTree.php, line 101

Class

RequestTree

Contains the hierarchical information of the requests.

Namespace

Drupal\subrequests\Blueprint

Code

public function getDescendant($request_id) {

  // Search this level's requests.
  $found = array_filter($this
    ->getRequests(), function (Request $request) use ($request_id) {
    return $request->attributes
      ->get(static::SUBREQUEST_ID) == $request_id;
  });
  if (count($found)) {
    return reset($found);
  }

  // If the request is not in this level, then traverse the children's trees.
  $found = array_filter($this
    ->getRequests(), function (Request $request) use ($request_id) {

    /** @var static $sub_tree */
    if (!($sub_tree = $request->attributes
      ->get(static::SUBREQUEST_TREE))) {
      return FALSE;
    }
    return $sub_tree
      ->getDescendant($request_id);
  });
  if (count($found)) {
    return reset($found);
  }
  return NULL;
}