public function JsonBlueprintDenormalizer::denormalize in Subrequests 8

Same name and namespace in other branches

1. 8.2 src/Normalizer/JsonBlueprintDenormalizer.php \Drupal\subrequests\Normalizer\JsonBlueprintDenormalizer::denormalize()
2. 3.x src/Normalizer/JsonBlueprintDenormalizer.php \Drupal\subrequests\Normalizer\JsonBlueprintDenormalizer::denormalize()

File

src/Normalizer/JsonBlueprintDenormalizer.php, line 33

Class

JsonBlueprintDenormalizer

Namespace

Drupal\subrequests\Normalizer

Code

public function denormalize($data, $class, $format = NULL, array $context = []) {

  // The top level is an array of normalized requests.
  $requests = array_map(function ($item) use ($format, $context) {
    return $this->serializer
      ->denormalize($item, Request::class, $format, $context);
  }, $data);

  // We want to create one tree per parent, but for that we need to identify
  // the parents first.
  $requests_per_parent = array_reduce($requests, function (array $carry, Request $request) {
    $parent_id = $request->attributes
      ->get(RequestTree::SUBREQUEST_PARENT_ID, RequestTree::ROOT_TREE_ID);
    if (empty($carry[$parent_id])) {
      $carry[$parent_id] = [];
    }
    $carry[$parent_id][] = $request;
    return $carry;
  }, []);

  // Now get all the requests for the root parent to create the root tree.
  $root_tree = new RequestTree($requests_per_parent[RequestTree::ROOT_TREE_ID]);
  unset($requests_per_parent[RequestTree::ROOT_TREE_ID]);

  // Iterate through all the parents to find them in the tree. The attach the
  // sub-tree to the root.
  // TODO: If a tree hangs from a parent that is not attached to the root, then this process may fail.
  foreach ($requests_per_parent as $parent_id => $children_requests) {
    $parent_requests = array_filter($requests, function (Request $request) use ($parent_id) {
      return $request->attributes
        ->get(RequestTree::SUBREQUEST_ID) == $parent_id;
    });
    $parent_request = reset($parent_requests);
    $parent_request->attributes
      ->set(RequestTree::SUBREQUEST_TREE, new RequestTree($children_requests, $parent_id));
  }
  return $root_tree;
}