From d42607998482e36865c1d8a443f92a457f6b2f3b Mon Sep 17 00:00:00 2001
From: Silvio Rhatto <rhatto@riseup.net>
Date: Sat, 15 Mar 2014 15:11:12 -0300
Subject: Squashed 'mod/minify/' content from commit 5949018

git-subtree-dir: mod/minify
git-subtree-split: 594901859d5afc1fa364322428bd7a6d5c6a3f96
---
 vendors/min/lib/Minify/Cache/Memcache.php | 137 ++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 vendors/min/lib/Minify/Cache/Memcache.php

(limited to 'vendors/min/lib/Minify/Cache/Memcache.php')

diff --git a/vendors/min/lib/Minify/Cache/Memcache.php b/vendors/min/lib/Minify/Cache/Memcache.php
new file mode 100644
index 000000000..2b81e7a32
--- /dev/null
+++ b/vendors/min/lib/Minify/Cache/Memcache.php
@@ -0,0 +1,137 @@
+<?php
+/**
+ * Class Minify_Cache_Memcache
+ * @package Minify
+ */
+
+/**
+ * Memcache-based cache class for Minify
+ * 
+ * <code>
+ * // fall back to disk caching if memcache can't connect
+ * $memcache = new Memcache;
+ * if ($memcache->connect('localhost', 11211)) {
+ *     Minify::setCache(new Minify_Cache_Memcache($memcache));
+ * } else {
+ *     Minify::setCache();
+ * }
+ * </code>
+ **/
+class Minify_Cache_Memcache {
+    
+    /**
+     * Create a Minify_Cache_Memcache object, to be passed to 
+     * Minify::setCache().
+     *
+     * @param Memcache $memcache already-connected instance
+     * 
+     * @param int $expire seconds until expiration (default = 0
+     * meaning the item will not get an expiration date)
+     * 
+     * @return null
+     */
+    public function __construct($memcache, $expire = 0)
+    {
+        $this->_mc = $memcache;
+        $this->_exp = $expire;
+    }
+    
+    /**
+     * Write data to cache.
+     *
+     * @param string $id cache id
+     * 
+     * @param string $data
+     * 
+     * @return bool success
+     */
+    public function store($id, $data)
+    {
+        return $this->_mc->set($id, "{$_SERVER['REQUEST_TIME']}|{$data}", 0, $this->_exp);
+    }
+    
+    
+    /**
+     * Get the size of a cache entry
+     *
+     * @param string $id cache id
+     * 
+     * @return int size in bytes
+     */
+    public function getSize($id)
+    {
+        return $this->_fetch($id)
+            ? strlen($this->_data)
+            : false;
+    }
+    
+    /**
+     * Does a valid cache entry exist?
+     *
+     * @param string $id cache id
+     * 
+     * @param int $srcMtime mtime of the original source file(s)
+     * 
+     * @return bool exists
+     */
+    public function isValid($id, $srcMtime)
+    {
+        return ($this->_fetch($id) && ($this->_lm >= $srcMtime));
+    }
+    
+    /**
+     * Send the cached content to output
+     *
+     * @param string $id cache id
+     */
+    public function display($id)
+    {
+        echo $this->_fetch($id)
+            ? $this->_data
+            : '';
+    }
+    
+	/**
+     * Fetch the cached content
+     *
+     * @param string $id cache id
+     * 
+     * @return string
+     */
+    public function fetch($id)
+    {
+        return $this->_fetch($id)
+            ? $this->_data
+            : '';
+    }
+    
+    private $_mc = null;
+    private $_exp = null;
+    
+    // cache of most recently fetched id
+    private $_lm = null;
+    private $_data = null;
+    private $_id = null;
+    
+	/**
+     * Fetch data and timestamp from memcache, store in instance
+     * 
+     * @param string $id
+     * 
+     * @return bool success
+     */
+    private function _fetch($id)
+    {
+        if ($this->_id === $id) {
+            return true;
+        }
+        $ret = $this->_mc->get($id);
+        if (false === $ret) {
+            $this->_id = null;
+            return false;
+        }
+        list($this->_lm, $this->_data) = explode('|', $ret, 2);
+        $this->_id = $id;
+        return true;
+    }
+}
-- 
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