update Piwik to version 2.16 (fixes #91)

www/analytics/vendor/piwik/cache/src/Transient.php

@@ -0,0 +1,89 @@
+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/lgpl-3.0.html LGPL v3 or later
+ *
+ */
+namespace Piwik\Cache;
+
+use Piwik\Cache\Backend;
+
+/**
+ * This class is used to cache data during one request.
+ *
+ * Compared to the lazy cache it does not support setting any lifetime. To be a fast cache it does
+ * not validate any cache id etc.
+ */
+class Transient implements Cache
+{
+    /**
+     * @var array $data
+     */
+    private $data = array();
+
+    /**
+     * Fetches an entry from the cache.
+     *
+     * Make sure to call the method {@link has()} to verify whether there is actually any content set under this
+     * cache id.
+     *
+     * @param string $id The cache id.
+     * @return mixed
+     */
+    public function fetch($id)
+    {
+        if ($this->contains($id)) {
+            return $this->data[$id];
+        }
+
+        return false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function contains($id)
+    {
+        return isset($this->data[$id]) || array_key_exists($id, $this->data);
+    }
+
+    /**
+     * Puts data into the cache.
+     *
+     * @param string $id The cache id.
+     * @param mixed $content
+     * @param int $lifeTime Setting a lifetime is not supported by this cache and the parameter will be ignored.
+     * @return boolean
+     */
+    public function save($id, $content, $lifeTime = 0)
+    {
+        $this->data[$id] = $content;
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function delete($id)
+    {
+        if (!$this->contains($id)) {
+            return false;
+        }
+
+        unset($this->data[$id]);
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function flushAll()
+    {
+        $this->data = array();
+
+        return true;
+    }
+}