add smarty engine, remove some obsolete zot1 stuff

library/Smarty/demo/plugins/cacheresource.memcache.php

@@ -0,0 +1,91 @@
+<?php
+
+/**
+ * Memcache CacheResource
+ *
+ * CacheResource Implementation based on the KeyValueStore API to use
+ * memcache as the storage resource for Smarty's output caching.
+ *
+ * Note that memcache has a limitation of 256 characters per cache-key.
+ * To avoid complications all cache-keys are translated to a sha1 hash.
+ *
+ * @package CacheResource-examples
+ * @author Rodney Rehm
+ */
+class Smarty_CacheResource_Memcache extends Smarty_CacheResource_KeyValueStore {
+    /**
+     * memcache instance
+     * @var Memcache
+     */
+    protected $memcache = null;
+    
+    public function __construct()
+    {
+        $this->memcache = new Memcache();
+        $this->memcache->addServer( '127.0.0.1', 11211 );
+    }
+    
+    /**
+     * 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)
+    {
+        $_keys = $lookup = array();
+        foreach ($keys as $k) {
+            $_k = sha1($k);
+            $_keys[] = $_k;
+            $lookup[$_k] = $k;
+        }
+        $_res = array();
+        $res = $this->memcache->get($_keys);
+        foreach ($res as $k => $v) {
+            $_res[$lookup[$k]] = $v;
+        }
+        return $_res;
+    }
+    
+    /**
+     * 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, $expire=null)
+    {
+        foreach ($keys as $k => $v) {
+            $k = sha1($k);
+            $this->memcache->set($k, $v, 0, $expire);
+        }
+        return true;
+    }
+
+    /**
+     * 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) {
+            $k = sha1($k);
+            $this->memcache->delete($k);
+        }
+        return true;
+    }
+
+    /**
+     * Remove *all* values from cache
+     *
+     * @return boolean true on success, false on failure
+     */
+    protected function purge()
+    {
+        return $this->memcache->flush();
+    }
+}