refs matomo-org#5290 - use doctrine-cache for caching

Cache/StaticCache.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * Device Detector - The Universal Device Detection library for parsing User Agents
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/lgpl.html LGPL v3 or later
+ */
+namespace DeviceDetector\Cache;
+
+use Doctrine\Common\Cache\CacheProvider;
+
+/**
+ * Class StaticCache
+ *
+ * Simple Cache that caches in a static property
+ * (Speeds up multiple detections in one request)
+ *
+ * @package DeviceDetector\Cache
+ */
+class StaticCache extends CacheProvider
+{
+    /**
+     * Holds the static cache data
+     * @var array
+     */
+    static protected $staticCache = array();
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doFetch($id)
+    {
+        return $this->doContains($id) ? self::$staticCache[$id] : false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doContains($id)
+    {
+        return isset(self::$staticCache[$id]) || array_key_exists($id, self::$staticCache);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doSave($id, $data, $lifeTime = 0)
+    {
+        self::$staticCache[$id] = $data;
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doDelete($id)
+    {
+        unset(self::$staticCache[$id]);
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doGetStats()
+    {
+        return null;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doFlush()
+    {
+        self::$staticCache = array();
+        return true;
+    }
+}