public function AjaxRenderer::renderResponse

Renders the main content render array into a response.

Parameters

array $main_content: The render array representing the main content.

\Symfony\Component\HttpFoundation\Request $request: The request object, for context.

\Drupal\Core\Routing\RouteMatchInterface $route_match: The route match, for context.

Return value

\Symfony\Component\HttpFoundation\Response The Response in the format that this implementation supports.

Overrides MainContentRendererInterface::renderResponse

File

core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php, line 49

Class

AjaxRenderer

Default main content renderer for Ajax requests.

Namespace

Code

public function renderResponse(array $main_content, Request $request, RouteMatchInterface $route_match) {
  $response = new AjaxResponse();
  if (isset($main_content['#type']) && $main_content['#type'] == 'ajax') {

    // Complex Ajax callbacks can return a result that contains an error
    // message or a specific set of commands to send to the browser.
    $main_content += $this->elementInfoManager
      ->getInfo('ajax');
    $error = $main_content['#error'];
    if (!empty($error)) {

      // Fall back to some default message otherwise use the specific one.
      if (!is_string($error)) {
        $error = 'An error occurred while handling the request: The server received invalid input.';
      }
      $response
        ->addCommand(new AlertCommand($error));
    }
  }
  $html = $this->renderer
    ->renderRoot($main_content);
  $response
    ->setAttachments($main_content['#attached']);

  // The selector for the insert command is NULL as the new content will
  // replace the element making the Ajax call. The default 'replaceWith'
  // behavior can be changed with #ajax['method'].
  $response
    ->addCommand(new InsertCommand(NULL, $html));
  $status_messages = [
    '#type' => 'status_messages',
  ];
  $output = $this->renderer
    ->renderRoot($status_messages);
  if (!empty($output)) {
    $response
      ->addCommand(new PrependCommand(NULL, $output));
  }
  return $response;
}