class ViewAjaxController in Drupal 8

Defines a controller to load a view via AJAX.

Hierarchy

• class \Drupal\views\Controller\ViewAjaxController implements ContainerInjectionInterface

1 file declares its use of ViewAjaxController

ViewAjaxControllerTest.php in core/modules/views/tests/src/Unit/Controller/ViewAjaxControllerTest.php

File

core/modules/views/src/Controller/ViewAjaxController.php, line 29

Namespace

Drupal\views\Controller

class ViewAjaxController implements ContainerInjectionInterface {

  /**
   * The entity storage for views.
   *
   * @var \Drupal\Core\Entity\EntityStorageInterface
   */
  protected $storage;

  /**
   * The factory to load a view executable with.
   *
   * @var \Drupal\views\ViewExecutableFactory
   */
  protected $executableFactory;

  /**
   * The renderer.
   *
   * @var \Drupal\Core\Render\RendererInterface
   */
  protected $renderer;

  /**
   * The current path.
   *
   * @var \Drupal\Core\Path\CurrentPathStack
   */
  protected $currentPath;

  /**
   * The redirect destination.
   *
   * @var \Drupal\Core\Routing\RedirectDestinationInterface
   */
  protected $redirectDestination;

  /**
   * Constructs a ViewAjaxController object.
   *
   * @param \Drupal\Core\Entity\EntityStorageInterface $storage
   *   The entity storage for views.
   * @param \Drupal\views\ViewExecutableFactory $executable_factory
   *   The factory to load a view executable with.
   * @param \Drupal\Core\Render\RendererInterface $renderer
   *   The renderer.
   * @param \Drupal\Core\Path\CurrentPathStack $current_path
   *   The current path.
   * @param \Drupal\Core\Routing\RedirectDestinationInterface $redirect_destination
   *   The redirect destination.
   */
  public function __construct(EntityStorageInterface $storage, ViewExecutableFactory $executable_factory, RendererInterface $renderer, CurrentPathStack $current_path, RedirectDestinationInterface $redirect_destination) {
    $this->storage = $storage;
    $this->executableFactory = $executable_factory;
    $this->renderer = $renderer;
    $this->currentPath = $current_path;
    $this->redirectDestination = $redirect_destination;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('entity_type.manager')
      ->getStorage('view'), $container
      ->get('views.executable'), $container
      ->get('renderer'), $container
      ->get('path.current'), $container
      ->get('redirect.destination'));
  }

  /**
   * Loads and renders a view via AJAX.
   *
   * @param \Symfony\Component\HttpFoundation\Request $request
   *   The current request object.
   *
   * @return \Drupal\views\Ajax\ViewAjaxResponse
   *   The view response as ajax response.
   *
   * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
   *   Thrown when the view was not found.
   */
  public function ajaxView(Request $request) {
    $name = $request->request
      ->get('view_name');
    $display_id = $request->request
      ->get('view_display_id');
    if (isset($name) && isset($display_id)) {
      $args = Html::decodeEntities($request->request
        ->get('view_args'));
      $args = isset($args) && $args !== '' ? explode('/', $args) : [];

      // Arguments can be empty, make sure they are passed on as NULL so that
      // argument validation is not triggered.
      $args = array_map(function ($arg) {
        return $arg == '' ? NULL : $arg;
      }, $args);
      $path = $request->request
        ->get('view_path');
      $dom_id = $request->request
        ->get('view_dom_id');
      $dom_id = isset($dom_id) ? preg_replace('/[^a-zA-Z0-9_-]+/', '-', $dom_id) : NULL;
      $pager_element = $request->request
        ->get('pager_element');
      $pager_element = isset($pager_element) ? intval($pager_element) : NULL;
      $response = new ViewAjaxResponse();

      // Remove all of this stuff from the query of the request so it doesn't
      // end up in pagers and tablesort URLs.
      // @todo Remove this parsing once these are removed from the request in
      //   https://www.drupal.org/node/2504709.
      foreach ([
        'view_name',
        'view_display_id',
        'view_args',
        'view_path',
        'view_dom_id',
        'pager_element',
        'view_base_path',
        AjaxResponseSubscriber::AJAX_REQUEST_PARAMETER,
        FormBuilderInterface::AJAX_FORM_REQUEST,
        MainContentViewSubscriber::WRAPPER_FORMAT,
      ] as $key) {
        $request->query
          ->remove($key);
        $request->request
          ->remove($key);
      }

      // Load the view.
      if (!($entity = $this->storage
        ->load($name))) {
        throw new NotFoundHttpException();
      }
      $view = $this->executableFactory
        ->get($entity);
      if ($view && $view
        ->access($display_id) && $view
        ->setDisplay($display_id) && $view->display_handler
        ->ajaxEnabled()) {
        $response
          ->setView($view);

        // Fix the current path for paging.
        if (!empty($path)) {
          $this->currentPath
            ->setPath('/' . ltrim($path, '/'), $request);
        }

        // Add all POST data, because AJAX is always a post and many things,
        // such as tablesorts, exposed filters and paging assume GET.
        $request_all = $request->request
          ->all();
        unset($request_all['ajax_page_state']);
        $query_all = $request->query
          ->all();
        $request->query
          ->replace($request_all + $query_all);

        // Overwrite the destination.
        // @see the redirect.destination service.
        $origin_destination = $path;
        $used_query_parameters = $request->query
          ->all();
        $query = UrlHelper::buildQuery($used_query_parameters);
        if ($query != '') {
          $origin_destination .= '?' . $query;
        }
        $this->redirectDestination
          ->set($origin_destination);

        // Override the display's pager_element with the one actually used.
        if (isset($pager_element)) {
          $response
            ->addCommand(new ScrollTopCommand(".js-view-dom-id-{$dom_id}"));
          $view->displayHandlers
            ->get($display_id)
            ->setOption('pager_element', $pager_element);
        }

        // Reuse the same DOM id so it matches that in drupalSettings.
        $view->dom_id = $dom_id;
        $context = new RenderContext();
        $preview = $this->renderer
          ->executeInRenderContext($context, function () use ($view, $display_id, $args) {
          return $view
            ->preview($display_id, $args);
        });
        if (!$context
          ->isEmpty()) {
          $bubbleable_metadata = $context
            ->pop();
          BubbleableMetadata::createFromRenderArray($preview)
            ->merge($bubbleable_metadata)
            ->applyTo($preview);
        }
        $response
          ->addCommand(new ReplaceCommand(".js-view-dom-id-{$dom_id}", $preview));
        return $response;
      }
      else {
        throw new AccessDeniedHttpException();
      }
    }
    else {
      throw new NotFoundHttpException();
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
ViewAjaxController::$currentPath	protected	property	The current path.
ViewAjaxController::$executableFactory	protected	property	The factory to load a view executable with.
ViewAjaxController::$redirectDestination	protected	property	The redirect destination.
ViewAjaxController::$renderer	protected	property	The renderer.
ViewAjaxController::$storage	protected	property	The entity storage for views.
ViewAjaxController::ajaxView	public	function	Loads and renders a view via AJAX.
ViewAjaxController::create	public static	function	Instantiates a new instance of this class. Overrides ContainerInjectionInterface::create
ViewAjaxController::__construct	public	function	Constructs a ViewAjaxController object.