Chris@14: <?php
Chris@14: 
Chris@14: namespace Drupal\layout_builder\Cache;
Chris@14: 
Chris@14: use Drupal\Core\Cache\CacheableMetadata;
Chris@14: use Drupal\Core\Cache\Context\CalculatedCacheContextInterface;
Chris@14: use Drupal\Core\Routing\RouteMatchInterface;
Chris@14: use Drupal\layout_builder\OverridesSectionStorageInterface;
Chris@14: 
Chris@14: /**
Chris@14:  * Determines whether Layout Builder is active for a given entity type or not.
Chris@14:  *
Chris@14:  * Cache context ID: 'layout_builder_is_active:%entity_type_id', e.g.
Chris@14:  * 'layout_builder_is_active:node' (to vary by whether the Node entity type has
Chris@14:  * Layout Builder enabled).
Chris@18:  *
Chris@18:  * @internal
Chris@18:  *   Tagged services are internal.
Chris@14:  */
Chris@14: class LayoutBuilderIsActiveCacheContext implements CalculatedCacheContextInterface {
Chris@14: 
Chris@14:   /**
Chris@14:    * The current route match.
Chris@14:    *
Chris@14:    * @var \Drupal\Core\Routing\RouteMatchInterface
Chris@14:    */
Chris@14:   protected $routeMatch;
Chris@14: 
Chris@14:   /**
Chris@14:    * LayoutBuilderCacheContext constructor.
Chris@14:    *
Chris@14:    * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
Chris@14:    *   The current route match.
Chris@14:    */
Chris@14:   public function __construct(RouteMatchInterface $route_match) {
Chris@14:     $this->routeMatch = $route_match;
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * {@inheritdoc}
Chris@14:    */
Chris@14:   public static function getLabel() {
Chris@14:     return t('Layout Builder');
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * {@inheritdoc}
Chris@14:    */
Chris@14:   public function getContext($entity_type_id = NULL) {
Chris@14:     if (!$entity_type_id) {
Chris@14:       throw new \LogicException('Missing entity type ID');
Chris@14:     }
Chris@14: 
Chris@14:     $display = $this->getDisplay($entity_type_id);
Chris@14:     return ($display && $display->isOverridable()) ? '1' : '0';
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * {@inheritdoc}
Chris@14:    */
Chris@14:   public function getCacheableMetadata($entity_type_id = NULL) {
Chris@14:     if (!$entity_type_id) {
Chris@14:       throw new \LogicException('Missing entity type ID');
Chris@14:     }
Chris@14: 
Chris@14:     $cacheable_metadata = new CacheableMetadata();
Chris@14:     if ($display = $this->getDisplay($entity_type_id)) {
Chris@14:       $cacheable_metadata->addCacheableDependency($display);
Chris@14:     }
Chris@14:     return $cacheable_metadata;
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * Returns the entity view display for a given entity type and view mode.
Chris@14:    *
Chris@14:    * @param string $entity_type_id
Chris@14:    *   The entity type ID.
Chris@14:    *
Chris@14:    * @return \Drupal\layout_builder\Entity\LayoutEntityDisplayInterface|null
Chris@14:    *   The entity view display, if it exists.
Chris@14:    */
Chris@14:   protected function getDisplay($entity_type_id) {
Chris@14:     if ($entity = $this->routeMatch->getParameter($entity_type_id)) {
Chris@14:       if ($entity instanceof OverridesSectionStorageInterface) {
Chris@14:         return $entity->getDefaultSectionStorage();
Chris@14:       }
Chris@14:     }
Chris@14:   }
Chris@14: 
Chris@14: }