Added new events and paths to support namespacing #1604

CHANGELOG.md

@@ -4,6 +4,8 @@
 1. [](#new)
     * Added a new `cache_control` system and page level property [#1591](https://github.com/getgrav/grav/issues/1591)
     * Added a new `clear_images_by_default` system property to stop cache clear events from removing processed images [#1481](https://github.com/getgrav/grav/pull/1481)
+    * Added new `onTwigLoader()` event to enable utilization of loader methods
+    * Added new `Twig::addPath()` and `Twig::prependPath()` methods to wrap loader methods and support namespacing [#1604](https://github.com/getgrav/grav/issues/1604)
 1. [](#bugfix)
     * Allow `session.timetout` field to be set to `0` via blueprints [#1598](https://github.com/getgrav/grav/issues/1598)
 

system/src/Grav/Common/Twig/Twig.php

@@ -98,6 +98,9 @@ public function init()
             $this->grav->fireEvent('onTwigTemplatePaths');
 
             $this->loader = new \Twig_Loader_Filesystem($this->twig_paths);
+
+            $this->grav->fireEvent('onTwigLoader');
+
             $this->loaderArray = new \Twig_Loader_Array([]);
             $loader_chain = new \Twig_Loader_Chain([$this->loaderArray, $this->loader]);
 
@@ -359,6 +362,26 @@ public function processSite($format = null, array $vars = [])
         return $output;
     }
 
+    /**
+     * Wraps the Twig_Loader_Filesystem addPath method (should be used only in `onTwigLoader()` event
+     * @param $template_path
+     * @param null $namespace
+     */
+    public function addPath($template_path, $namespace = null)
+    {
+        $this->loader->addPath($template_path, $namespace);
+    }
+
+    /**
+     * Wraps the Twig_Loader_Filesystem prependPath method (should be used only in `onTwigLoader()` event
+     * @param $template_path
+     * @param null $namespace
+     */
+    public function prependPath($template_path, $namespace = null)
+    {
+        $this->loader->prependPath($template_path, $namespace);
+    }
+
     /**
      * Simple helper method to get the twig template if it has already been set, else return
      * the one being passed in