diff --git a/library/smarty/libs/sysplugins/smarty_resource_custom.php b/library/smarty/libs/sysplugins/smarty_resource_custom.php
new file mode 100644
--- /dev/null
+++ b/library/smarty/libs/sysplugins/smarty_resource_custom.php
@@ -0,0 +1,90 @@
+<?php
+/**
+ * Smarty Resource Plugin
+ *
+ * @package    Smarty
+ * @subpackage TemplateResources
+ * @author     Rodney Rehm
+ */
+
+/**
+ * Smarty Resource Plugin
+ * Wrapper Implementation for custom resource plugins
+ *
+ * @package    Smarty
+ * @subpackage TemplateResources
+ */
+abstract class Smarty_Resource_Custom extends Smarty_Resource {
+    /**
+     * fetch template and its modification time from data source
+     *
+     * @param string $name template name
+     * @param string &$source template source
+     * @param integer &$mtime template modification timestamp (epoch)
+     */
+    abstract protected function fetch($name, &$source, &$mtime);
+
+    /**
+     * Fetch template'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 template source.}}
+     *
+     * @param  string $name template name
+     *
+     * @return integer|boolean timestamp (epoch) the template was modified, or false if not found
+     */
+    protected function fetchTimestamp($name) {
+        return null;
+    }
+
+    /**
+     * populate Source Object with meta data from Resource
+     *
+     * @param Smarty_Template_Source $source source object
+     * @param Smarty_Internal_Template $_template template object
+     */
+    public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {
+        $source->filepath = $source->type . ':' . $source->name;
+        $source->uid = sha1($source->type . ':' . $source->name);
+
+        $mtime = $this->fetchTimestamp($source->name);
+        if ($mtime !== null) {
+            $source->timestamp = $mtime;
+        } else {
+            $this->fetch($source->name, $content, $timestamp);
+            $source->timestamp = isset($timestamp) ? $timestamp : false;
+            if (isset($content)) {
+                $source->content = $content;
+            }
+        }
+        $source->exists = !!$source->timestamp;
+    }
+
+    /**
+     * Load template's source into current template object
+     *
+     * @param  Smarty_Template_Source $source source object
+     *
+     * @return string                 template source
+     * @throws SmartyException        if source cannot be loaded
+     */
+    public function getContent(Smarty_Template_Source $source) {
+        $this->fetch($source->name, $content, $timestamp);
+        if (isset($content)) {
+            return $content;
+        }
+
+        throw new SmartyException("Unable to read template {$source->type} '{$source->name}'");
+    }
+
+    /**
+     * Determine basename for compiled filename
+     *
+     * @param  Smarty_Template_Source $source source object
+     *
+     * @return string                 resource's basename
+     */
+    public function getBasename(Smarty_Template_Source $source) {
+        return basename($source->name);
+    }
+}