<?php
  /**
  * Mustache Template Custom Loader.
  *
  * A CustomLoader extends the normal FilesystemLoader with the ability to find templates inside specific layout and page directories.
  * @extends Mustache_Loader_FilesystemLoader
  */
  class CustomLoader extends Mustache_Loader_FilesystemLoader
  {
  private $page;
  private $layout;
  private $baseDir;
  
  public function __construct($baseDir, array $options = array())
  {
   $this->page_name = isset($options['page']) ? $options['page'] : 'index';
   $this->layout_name = isset($options['layout']) ? $options['layout'] : 'default';
   $this->baseDir = $baseDir;
  
   parent::__construct($baseDir, $options);
  }
  
  
  public function load($name)
  {
   //the template name is something like "page.index" or "layout.sidenav.items"
   //we check whether it's a layout or page , and depending on $this->page_name OR $this->layout_name we find the appropriate partial file
   $parts = explode('.', $name, 2);
   $type = $parts[0];
   if($type != 'page' AND $type != 'layout') return '';
  
   $file = str_replace('.' , '/' , $parts[1]);
   if($type == 'page' AND $file == 'content') return parent::load("/{$type}s/{$this->page_name}.mustache");
  
   $item_name = $type.'_name';
   $item_name = $this->$item_name;//page_name OR layout_name , value of current page or layout e.g. default, login | index, widgets, etc ...
  
   //look in the partials for this page or layout
   $path = "/{$type}s/partials/{$item_name}/{$file}.mustache";
   if(!is_file($this->baseDir.$path)) {
  	//look in the upper folder, which contains partials for all pages or layouts
  	$path = "/{$type}s/partials/_shared/{$file}.mustache";
  	if(!is_file($this->baseDir.$path)) return '';
   }
  
   return parent::load($path);//we don't use $this->baseDir.$path , because baseDir has already been passed onto parent(Mustache_Loader_FilesystemLoader)
  }
  
  
  
  }