www.aleph1.co.uk Git - yaffs-website/blob - web/core/modules/layout_builder/src/EventSubscriber/BlockComponentRenderArray.php

   1 <?php
   2
   3 namespace Drupal\layout_builder\EventSubscriber;
   4
   5 use Drupal\Core\Access\AccessResult;
   6 use Drupal\Core\Block\BlockPluginInterface;
   7 use Drupal\Core\Session\AccountInterface;
   8 use Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent;
   9 use Drupal\layout_builder\LayoutBuilderEvents;
  10 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  11
  12 /**
  13  * Builds render arrays and handles access for all block components.
  14  *
  15  * @internal
  16  *   Layout Builder is currently experimental and should only be leveraged by
  17  *   experimental modules and development releases of contributed modules.
  18  *   See https://www.drupal.org/core/experimental for more information.
  19  */
  20 class BlockComponentRenderArray implements EventSubscriberInterface {
  21
  22   /**
  23    * The current user.
  24    *
  25    * @var \Drupal\Core\Session\AccountInterface
  26    */
  27   protected $currentUser;
  28
  29   /**
  30    * Creates a BlockComponentRenderArray object.
  31    *
  32    * @param \Drupal\Core\Session\AccountInterface $current_user
  33    *   The current user.
  34    */
  35   public function __construct(AccountInterface $current_user) {
  36     $this->currentUser = $current_user;
  37   }
  38
  39   /**
  40    * {@inheritdoc}
  41    */
  42   public static function getSubscribedEvents() {
  43     $events[LayoutBuilderEvents::SECTION_COMPONENT_BUILD_RENDER_ARRAY] = ['onBuildRender', 100];
  44     return $events;
  45   }
  46
  47   /**
  48    * Builds render arrays for block plugins and sets it on the event.
  49    *
  50    * @param \Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent $event
  51    *   The section component render event.
  52    */
  53   public function onBuildRender(SectionComponentBuildRenderArrayEvent $event) {
  54     $block = $event->getPlugin();
  55     if (!$block instanceof BlockPluginInterface) {
  56       return;
  57     }
  58
  59     // Only check access if the component is not being previewed.
  60     if ($event->inPreview()) {
  61       $access = AccessResult::allowed()->setCacheMaxAge(0);
  62     }
  63     else {
  64       $access = $block->access($this->currentUser, TRUE);
  65     }
  66
  67     $event->addCacheableDependency($access);
  68     if ($access->isAllowed()) {
  69       $event->addCacheableDependency($block);
  70
  71       $build = [
  72         // @todo Move this to BlockBase in https://www.drupal.org/node/2931040.
  73         '#theme' => 'block',
  74         '#configuration' => $block->getConfiguration(),
  75         '#plugin_id' => $block->getPluginId(),
  76         '#base_plugin_id' => $block->getBaseId(),
  77         '#derivative_plugin_id' => $block->getDerivativeId(),
  78         '#weight' => $event->getComponent()->getWeight(),
  79         'content' => $block->build(),
  80       ];
  81       $event->setBuild($build);
  82     }
  83   }
  84
  85 }