diff core/lib/Drupal/Core/Cache/RefinableCacheableDependencyTrait.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Cache/RefinableCacheableDependencyTrait.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,96 @@
+<?php
+
+namespace Drupal\Core\Cache;
+
+/**
+ * Trait for \Drupal\Core\Cache\RefinableCacheableDependencyInterface.
+ */
+trait RefinableCacheableDependencyTrait {
+
+  /**
+   * Cache contexts.
+   *
+   * @var string[]
+   */
+  protected $cacheContexts = [];
+
+  /**
+   * Cache tags.
+   *
+   * @var string[]
+   */
+  protected $cacheTags = [];
+
+  /**
+   * Cache max-age.
+   *
+   * @var int
+   */
+  protected $cacheMaxAge = Cache::PERMANENT;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheTags() {
+    return $this->cacheTags;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheContexts() {
+    return $this->cacheContexts;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheMaxAge() {
+    return $this->cacheMaxAge;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function addCacheableDependency($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;
+  }
+
+}