From 50344b19c02aee8d457c63d0fafdf2b793c62d98 Mon Sep 17 00:00:00 2001
From: Ian <aristophian@googlemail.com>
Date: Sun, 8 Jun 2014 19:27:56 +0200
Subject: [PATCH] get ready for Smarty apc caching

---
 .../Smarty/libs/plugins/cacheresource.apc.php | 61 +++++++++++++++++++
 include/serendipity_smarty_class.inc.php      |  4 ++
 2 files changed, 65 insertions(+)
 create mode 100644 bundled-libs/Smarty/libs/plugins/cacheresource.apc.php

diff --git a/bundled-libs/Smarty/libs/plugins/cacheresource.apc.php b/bundled-libs/Smarty/libs/plugins/cacheresource.apc.php
new file mode 100644
index 00000000..8c1d639b
--- /dev/null
+++ b/bundled-libs/Smarty/libs/plugins/cacheresource.apc.php
@@ -0,0 +1,61 @@
+<?php
+
+/**
+ * APC CacheResource for Smarty 3.1.x
+ *
+ * CacheResource Implementation based on the KeyValueStore API to use
+ * apc as the storage resource for Smarty's output caching.
+ *
+ */
+class Smarty_CacheResource_Apc extends Smarty_CacheResource_KeyValueStore {
+
+    public function __construct()
+    {
+        if(!function_exists('apc_cache_info'))
+          throw new Exception('APC Template Caching Error: APC is not installed');
+    }
+    /**
+     * Read values for a set of keys from cache
+     *
+     * @param array $keys list of keys to fetch
+     * @return array list of values with the given keys used as indexes
+     * @return boolean true on success, false on failure
+     */
+    protected function read(array $keys)
+    {
+      return apc_fetch($keys);
+    }
+    /**
+     * Save values for a set of keys to cache
+     *
+     * @param array $keys list of values to save
+     * @param int $expire expiration time
+     * @return boolean true on success, false on failure
+     */
+    protected function write(array $keys, $expire=null)
+    {
+        return apc_store($keys, null, $expire);
+    }
+    /**
+     * Remove values from cache
+     *
+     * @param array $keys list of keys to delete
+     * @return boolean true on success, false on failure
+     */
+    protected function delete(array $keys)
+    {
+        foreach ($keys as $k) {
+           apc_delete($k);
+        }
+        return true;
+    }
+    /**
+     * Remove *all* values from cache
+     *
+     * @return boolean true on success, false on failure
+     */
+    protected function purge()
+    {
+        return apc_clear_cache('user');
+    }
+}
diff --git a/include/serendipity_smarty_class.inc.php b/include/serendipity_smarty_class.inc.php
index 3223abd3..944e283a 100644
--- a/include/serendipity_smarty_class.inc.php
+++ b/include/serendipity_smarty_class.inc.php
@@ -167,6 +167,10 @@ class Serendipity_Smarty extends Smarty
             Set Smarty caching 
         */
          
+        // enable for APC in-memory (RAM) storage caching - must be enabled in PHP
+        #apc-cache# $this->addPluginsDir ( SMARTY_DIR . 'plugins/' );
+        #apc-cache# $this->caching_type = 'apc'; //$this->setCachingType ( 'apc' );
+
         /*
             Caching is disabled, as long as we haven't figured out on how to use it best here....