Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\Cache;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides an implementation of CacheableResponseInterface.
Chris@0:  *
Chris@0:  * @see \Drupal\Core\Cache\CacheableResponseInterface
Chris@0:  */
Chris@0: trait CacheableResponseTrait {
Chris@0: 
Chris@0:   /**
Chris@0:    * The cacheability metadata.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Cache\CacheableMetadata
Chris@0:    */
Chris@0:   protected $cacheabilityMetadata;
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function addCacheableDependency($dependency) {
Chris@0:     // A trait doesn't have a constructor, so initialize the cacheability
Chris@0:     // metadata if that hasn't happened yet.
Chris@0:     if (!isset($this->cacheabilityMetadata)) {
Chris@0:       $this->cacheabilityMetadata = new CacheableMetadata();
Chris@0:     }
Chris@0: 
Chris@0:     $this->cacheabilityMetadata = $this->cacheabilityMetadata->merge(CacheableMetadata::createFromObject($dependency));
Chris@0: 
Chris@0:     return $this;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getCacheableMetadata() {
Chris@0:     // A trait doesn't have a constructor, so initialize the cacheability
Chris@0:     // metadata if that hasn't happened yet.
Chris@0:     if (!isset($this->cacheabilityMetadata)) {
Chris@0:       $this->cacheabilityMetadata = new CacheableMetadata();
Chris@0:     }
Chris@0: 
Chris@0:     return $this->cacheabilityMetadata;
Chris@0:   }
Chris@0: 
Chris@0: }