diff --git a/library/smarty/libs/sysplugins/smarty_cacheresource_custom.php b/library/smarty/libs/sysplugins/smarty_cacheresource_custom.php
new file mode 100644
--- /dev/null
+++ b/library/smarty/libs/sysplugins/smarty_cacheresource_custom.php
@@ -0,0 +1,300 @@
+<?php
+/**
+ * Smarty Internal Plugin
+ *
+ * @package    Smarty
+ * @subpackage Cacher
+ */
+
+/**
+ * Cache Handler API
+ *
+ * @package    Smarty
+ * @subpackage Cacher
+ * @author     Rodney Rehm
+ */
+abstract class Smarty_CacheResource_Custom extends Smarty_CacheResource {
+    /**
+     * fetch cached content and its modification time from data source
+     *
+     * @param  string $id unique cache content identifier
+     * @param  string $name template name
+     * @param  string $cache_id cache id
+     * @param  string $compile_id compile id
+     * @param  string $content cached content
+     * @param  integer $mtime cache modification timestamp (epoch)
+     *
+     * @return void
+     */
+    abstract protected function fetch($id, $name, $cache_id, $compile_id, &$content, &$mtime);
+
+    /**
+     * Fetch cached content's modification timestamp from data source
+     * {@internal implementing this method is optional.
+     *  Only implement it if modification times can be accessed faster than loading the complete cached content.}}
+     *
+     * @param  string $id unique cache content identifier
+     * @param  string $name template name
+     * @param  string $cache_id cache id
+     * @param  string $compile_id compile id
+     *
+     * @return integer|boolean timestamp (epoch) the template was modified, or false if not found
+     */
+    protected function fetchTimestamp($id, $name, $cache_id, $compile_id) {
+        return null;
+    }
+
+    /**
+     * Save content to cache
+     *
+     * @param  string $id unique cache content identifier
+     * @param  string $name template name
+     * @param  string $cache_id cache id
+     * @param  string $compile_id compile id
+     * @param  integer|null $exp_time seconds till expiration or null
+     * @param  string $content content to cache
+     *
+     * @return boolean      success
+     */
+    abstract protected function save($id, $name, $cache_id, $compile_id, $exp_time, $content);
+
+    /**
+     * Delete content from cache
+     *
+     * @param  string $name template name
+     * @param  string $cache_id cache id
+     * @param  string $compile_id compile id
+     * @param  integer|null $exp_time seconds till expiration time in seconds or null
+     *
+     * @return integer      number of deleted caches
+     */
+    abstract protected function delete($name, $cache_id, $compile_id, $exp_time);
+
+    /**
+     * populate Cached Object with meta data from Resource
+     *
+     * @param  Smarty_Template_Cached $cached cached object
+     * @param  Smarty_Internal_Template $_template template object
+     *
+     * @return void
+     */
+    public function populate(Smarty_Template_Cached $cached, Smarty_Internal_Template $_template) {
+        $_cache_id = isset($cached->cache_id) ? preg_replace('![^\w\|]+!', '_', $cached->cache_id) : null;
+        $_compile_id = isset($cached->compile_id) ? preg_replace('![^\w\|]+!', '_', $cached->compile_id) : null;
+        $path = $cached->source->filepath . $_cache_id . $_compile_id;
+        $cached->filepath = sha1($path);
+        if ($_template->smarty->cache_locking) {
+            $cached->lock_id = sha1('lock.' . $path);
+        }
+        $this->populateTimestamp($cached);
+    }
+
+    /**
+     * populate Cached Object with timestamp and exists from Resource
+     *
+     * @param Smarty_Template_Cached $cached
+     *
+     * @return void
+     */
+    public function populateTimestamp(Smarty_Template_Cached $cached) {
+        $mtime = $this->fetchTimestamp($cached->filepath, $cached->source->name, $cached->cache_id, $cached->compile_id);
+        if ($mtime !== null) {
+            $cached->timestamp = $mtime;
+            $cached->exists = !!$cached->timestamp;
+
+            return;
+        }
+        $timestamp = null;
+        $this->fetch($cached->filepath, $cached->source->name, $cached->cache_id, $cached->compile_id, $cached->content, $timestamp);
+        $cached->timestamp = isset($timestamp) ? $timestamp : false;
+        $cached->exists = !!$cached->timestamp;
+    }
+
+    /**
+     * Read the cached template and process the header
+     *
+     * @param  Smarty_Internal_Template $_template template object
+     * @param  Smarty_Template_Cached $cached cached object
+     *
+     * @return boolean                 true or false if the cached content does not exist
+     */
+    public function process(Smarty_Internal_Template $_template, Smarty_Template_Cached $cached = null) {
+        if (!$cached) {
+            $cached = $_template->cached;
+        }
+        $content = $cached->content ? $cached->content : null;
+        $timestamp = $cached->timestamp ? $cached->timestamp : null;
+        if ($content === null || !$timestamp) {
+            $this->fetch(
+                $_template->cached->filepath,
+                $_template->source->name,
+                $_template->cache_id,
+                $_template->compile_id,
+                $content,
+                $timestamp
+            );
+        }
+        if (isset($content)) {
+            /** @var Smarty_Internal_Template $_smarty_tpl
+             * used in evaluated code
+             */
+            $_smarty_tpl = $_template;
+            eval("?>" . $content);
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Write the rendered template output to cache
+     *
+     * @param  Smarty_Internal_Template $_template template object
+     * @param  string $content content to cache
+     *
+     * @return boolean                  success
+     */
+    public function writeCachedContent(Smarty_Internal_Template $_template, $content) {
+        return $this->save(
+            $_template->cached->filepath,
+            $_template->source->name,
+            $_template->cache_id,
+            $_template->compile_id,
+            $_template->properties['cache_lifetime'],
+            $content
+        );
+    }
+
+    /**
+     * Read cached template from cache
+     *
+     * @param  Smarty_Internal_Template $_template template object
+     *
+     * @return string  content
+     */
+    public function readCachedContent(Smarty_Internal_Template $_template) {
+        $content = $_template->cached->content ? $_template->cached->content : null;
+        $timestamp = null;
+        if ($content === null) {
+            $timestamp = null;
+            $this->fetch(
+                $_template->cached->filepath,
+                $_template->source->name,
+                $_template->cache_id,
+                $_template->compile_id,
+                $content,
+                $timestamp
+            );
+        }
+        if (isset($content)) {
+            return $content;
+        }
+        return false;
+    }
+
+    /**
+     * Empty cache
+     *
+     * @param  Smarty $smarty Smarty object
+     * @param  integer $exp_time expiration time (number of seconds, not timestamp)
+     *
+     * @return integer number of cache files deleted
+     */
+    public function clearAll(Smarty $smarty, $exp_time = null) {
+        $this->cache = array();
+
+        return $this->delete(null, null, null, $exp_time);
+    }
+
+    /**
+     * Empty cache for a specific template
+     *
+     * @param  Smarty $smarty Smarty object
+     * @param  string $resource_name template name
+     * @param  string $cache_id cache id
+     * @param  string $compile_id compile id
+     * @param  integer $exp_time expiration time (number of seconds, not timestamp)
+     *
+     * @return integer number of cache files deleted
+     */
+    public function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time) {
+        $this->cache = array();
+        $cache_name = null;
+
+        if (isset($resource_name)) {
+            $_save_stat = $smarty->caching;
+            $smarty->caching = true;
+            $tpl = new $smarty->template_class($resource_name, $smarty);
+            $smarty->caching = $_save_stat;
+
+            if ($tpl->source->exists) {
+                $cache_name = $tpl->source->name;
+            } else {
+                return 0;
+            }
+            // remove from template cache
+            if ($smarty->allow_ambiguous_resources) {
+                $_templateId = $tpl->source->unique_resource . $tpl->cache_id . $tpl->compile_id;
+            } else {
+                $_templateId = $smarty->joined_template_dir . '#' . $resource_name . $tpl->cache_id . $tpl->compile_id;
+            }
+            if (isset($_templateId[150])) {
+                $_templateId = sha1($_templateId);
+            }
+            unset($smarty->template_objects[$_templateId]);
+            // template object no longer needed
+            unset($tpl);
+        }
+
+        return $this->delete($cache_name, $cache_id, $compile_id, $exp_time);
+    }
+
+    /**
+     * Check is cache is locked for this template
+     *
+     * @param  Smarty $smarty Smarty object
+     * @param  Smarty_Template_Cached $cached cached object
+     *
+     * @return boolean               true or false if cache is locked
+     */
+    public function hasLock(Smarty $smarty, Smarty_Template_Cached $cached) {
+        $id = $cached->lock_id;
+        $name = $cached->source->name . '.lock';
+
+        $mtime = $this->fetchTimestamp($id, $name, $cached->cache_id, $cached->compile_id);
+        if ($mtime === null) {
+            $this->fetch($id, $name, $cached->cache_id, $cached->compile_id, $content, $mtime);
+        }
+        return $mtime && ($t = time()) - $mtime < $smarty->locking_timeout;
+    }
+
+    /**
+     * Lock cache for this template
+     *
+     * @param Smarty $smarty Smarty object
+     * @param Smarty_Template_Cached $cached cached object
+     *
+     * @return bool|void
+     */
+    public function acquireLock(Smarty $smarty, Smarty_Template_Cached $cached) {
+        $cached->is_locked = true;
+        $id = $cached->lock_id;
+        $name = $cached->source->name . '.lock';
+        $this->save($id, $name, $cached->cache_id, $cached->compile_id, $smarty->locking_timeout, '');
+    }
+
+    /**
+     * Unlock cache for this template
+     *
+     * @param Smarty $smarty Smarty object
+     * @param Smarty_Template_Cached $cached cached object
+     *
+     * @return bool|void
+     */
+    public function releaseLock(Smarty $smarty, Smarty_Template_Cached $cached) {
+        $cached->is_locked = false;
+        $name = $cached->source->name . '.lock';
+        $this->delete($name, $cached->cache_id, $cached->compile_id, null);
+    }
+}