RefinableCacheableDependencyTrait.php

<?php

namespace Drupal\Core\Cache;


/**
 * Trait for \Drupal\Core\Cache\RefinableCacheableDependencyInterface.
 */
trait RefinableCacheableDependencyTrait {
    use CacheableDependencyTrait;
    
    /**
     * {@inheritdoc}
     */
    public function addCacheableDependency($other_object) {
        if ($other_object instanceof CacheableDependencyInterface) {
            $this->addCacheContexts($other_object->getCacheContexts());
            $this->addCacheTags($other_object->getCacheTags());
            $this->mergeCacheMaxAge($other_object->getCacheMaxAge());
        }
        else {
            // Not a cacheable dependency, this can not be cached.
            $this->cacheMaxAge = 0;
        }
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function addCacheContexts(array $cache_contexts) {
        if ($cache_contexts) {
            $this->cacheContexts = Cache::mergeContexts($this->cacheContexts, $cache_contexts);
        }
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function addCacheTags(array $cache_tags) {
        if ($cache_tags) {
            $this->cacheTags = Cache::mergeTags($this->cacheTags, $cache_tags);
        }
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function mergeCacheMaxAge($max_age) {
        $this->cacheMaxAge = Cache::mergeMaxAges($this->cacheMaxAge, $max_age);
        return $this;
    }

}