function BigPipeResponseAttachmentsProcessor::processAttachments

Overrides HtmlResponseAttachmentsProcessor::processAttachments

File

core/modules/big_pipe/src/Render/BigPipeResponseAttachmentsProcessor.php, line 63

Class

BigPipeResponseAttachmentsProcessor

Processes attachments of HTML responses with BigPipe enabled.

Namespace

Code

public function processAttachments(AttachmentsInterface $response) {
  assert($response instanceof HtmlResponse);
  // First, render the actual placeholders; this will cause the BigPipe
  // placeholder strategy to generate BigPipe placeholders. We need those to
  // exist already so that we can extract BigPipe placeholders. This is hence
  // a bit of unfortunate but necessary duplication.
  // @see \Drupal\big_pipe\Render\Placeholder\BigPipeStrategy
  // (Note this is copied verbatim from
  // \Drupal\Core\Render\HtmlResponseAttachmentsProcessor::processAttachments)
  try {
    $response = $this->renderPlaceholders($response);
  } catch (EnforcedResponseException $e) {
    return $e->getResponse();
  }
  // Extract BigPipe placeholders; HtmlResponseAttachmentsProcessor does not
  // know (nor need to know) how to process those.
  $attachments = $response->getAttachments();
  $big_pipe_placeholders = [];
  $big_pipe_nojs_placeholders = [];
  if (isset($attachments['big_pipe_placeholders'])) {
    $big_pipe_placeholders = $attachments['big_pipe_placeholders'];
    unset($attachments['big_pipe_placeholders']);
  }
  if (isset($attachments['big_pipe_nojs_placeholders'])) {
    $big_pipe_nojs_placeholders = $attachments['big_pipe_nojs_placeholders'];
    unset($attachments['big_pipe_nojs_placeholders']);
  }
  $html_response = clone $response;
  $html_response->setAttachments($attachments);
  // Call HtmlResponseAttachmentsProcessor to process all other attachments.
  $processed_html_response = $this->htmlResponseAttachmentsProcessor
    ->processAttachments($html_response);
  // Restore BigPipe placeholders.
  $attachments = $processed_html_response->getAttachments();
  $big_pipe_response = clone $processed_html_response;
  if (count($big_pipe_placeholders)) {
    $attachments['big_pipe_placeholders'] = $big_pipe_placeholders;
  }
  if (count($big_pipe_nojs_placeholders)) {
    $attachments['big_pipe_nojs_placeholders'] = $big_pipe_nojs_placeholders;
  }
  $big_pipe_response->setAttachments($attachments);
  return $big_pipe_response;
}