Version 1

[yaffs-website] / web / core / lib / Drupal / Core / Cache / Context / QueryArgsCacheContext.php

diff --git a/web/core/lib/Drupal/Core/Cache/Context/QueryArgsCacheContext.php b/web/core/lib/Drupal/Core/Cache/Context/QueryArgsCacheContext.php
new file mode 100644 (file)
index 0000000..a486644
--- /dev/null
+++ b/web/core/lib/Drupal/Core/Cache/Context/QueryArgsCacheContext.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Drupal\Core\Cache\Context;
+
+use Drupal\Core\Cache\CacheableMetadata;
+
+/**
+ * Defines the QueryArgsCacheContext service, for "per query args" caching.
+ *
+ * Cache context ID: 'url.query_args' (to vary by all query arguments).
+ * Calculated cache context ID: 'url.query_args:%key', e.g.'url.query_args:foo'
+ * (to vary by the 'foo' query argument).
+ */
+class QueryArgsCacheContext extends RequestStackCacheContextBase implements CalculatedCacheContextInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getLabel() {
+    return t('Query arguments');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getContext($query_arg = NULL) {
+    if ($query_arg === NULL) {
+      // All arguments requested. Use normalized query string to minimize
+      // variations.
+      $value = $this->requestStack->getCurrentRequest()->getQueryString();
+      return ($value !== NULL) ? $value : '';
+    }
+    elseif ($this->requestStack->getCurrentRequest()->query->has($query_arg)) {
+      $value = $this->requestStack->getCurrentRequest()->query->get($query_arg);
+      if (is_array($value)) {
+        return http_build_query($value);
+      }
+      elseif ($value !== '') {
+        return $value;
+      }
+      return '?valueless?';
+    }
+    return '';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheableMetadata($query_arg = NULL) {
+    return new CacheableMetadata();
+  }
+
+}