Chris@14: <?php
Chris@14: 
Chris@14: namespace Drupal\layout_builder\EventSubscriber;
Chris@14: 
Chris@14: use Drupal\Core\Access\AccessResult;
Chris@14: use Drupal\Core\Block\BlockPluginInterface;
Chris@14: use Drupal\Core\Session\AccountInterface;
Chris@14: use Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent;
Chris@14: use Drupal\layout_builder\LayoutBuilderEvents;
Chris@14: use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@14: 
Chris@14: /**
Chris@14:  * Builds render arrays and handles access for all block components.
Chris@14:  *
Chris@14:  * @internal
Chris@14:  *   Layout Builder is currently experimental and should only be leveraged by
Chris@14:  *   experimental modules and development releases of contributed modules.
Chris@14:  *   See https://www.drupal.org/core/experimental for more information.
Chris@14:  */
Chris@14: class BlockComponentRenderArray implements EventSubscriberInterface {
Chris@14: 
Chris@14:   /**
Chris@14:    * The current user.
Chris@14:    *
Chris@14:    * @var \Drupal\Core\Session\AccountInterface
Chris@14:    */
Chris@14:   protected $currentUser;
Chris@14: 
Chris@14:   /**
Chris@14:    * Creates a BlockComponentRenderArray object.
Chris@14:    *
Chris@14:    * @param \Drupal\Core\Session\AccountInterface $current_user
Chris@14:    *   The current user.
Chris@14:    */
Chris@14:   public function __construct(AccountInterface $current_user) {
Chris@14:     $this->currentUser = $current_user;
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * {@inheritdoc}
Chris@14:    */
Chris@14:   public static function getSubscribedEvents() {
Chris@14:     $events[LayoutBuilderEvents::SECTION_COMPONENT_BUILD_RENDER_ARRAY] = ['onBuildRender', 100];
Chris@14:     return $events;
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * Builds render arrays for block plugins and sets it on the event.
Chris@14:    *
Chris@14:    * @param \Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent $event
Chris@14:    *   The section component render event.
Chris@14:    */
Chris@14:   public function onBuildRender(SectionComponentBuildRenderArrayEvent $event) {
Chris@14:     $block = $event->getPlugin();
Chris@14:     if (!$block instanceof BlockPluginInterface) {
Chris@14:       return;
Chris@14:     }
Chris@14: 
Chris@14:     // Only check access if the component is not being previewed.
Chris@14:     if ($event->inPreview()) {
Chris@14:       $access = AccessResult::allowed()->setCacheMaxAge(0);
Chris@14:     }
Chris@14:     else {
Chris@14:       $access = $block->access($this->currentUser, TRUE);
Chris@14:     }
Chris@14: 
Chris@14:     $event->addCacheableDependency($access);
Chris@14:     if ($access->isAllowed()) {
Chris@14:       $event->addCacheableDependency($block);
Chris@14: 
Chris@14:       $build = [
Chris@14:         // @todo Move this to BlockBase in https://www.drupal.org/node/2931040.
Chris@14:         '#theme' => 'block',
Chris@14:         '#configuration' => $block->getConfiguration(),
Chris@14:         '#plugin_id' => $block->getPluginId(),
Chris@14:         '#base_plugin_id' => $block->getBaseId(),
Chris@14:         '#derivative_plugin_id' => $block->getDerivativeId(),
Chris@14:         '#weight' => $event->getComponent()->getWeight(),
Chris@14:         'content' => $block->build(),
Chris@14:       ];
Chris@14:       $event->setBuild($build);
Chris@14:     }
Chris@14:   }
Chris@14: 
Chris@14: }