Changed CIBonfire Admin_Controller to include returning media types from Module folder structure

MY_Controller.php

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * Bonfire
 *
 * An open source project to allow developers get a jumpstart their development of CodeIgniter applications
 *
 * @package   Bonfire
 * @author    Bonfire Dev Team
 * @copyright Copyright (c) 2011 - 2013, Bonfire Dev Team
 * @license   http://guides.cibonfire.com/license.html
 * @link      http://cibonfire.com
 * @since     Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * Base Controller
 *
 * This controller provides a controller that your controllers can extend
 * from. This allows any tasks that need to be performed sitewide to be
 * done in one place.
 *
 * Since it extends from MX_Controller, any controller in the system
 * can be used in the HMVC style, using modules::run(). See the docs
 * at: https://bitbucket.org/wiredesignz/codeigniter-modular-extensions-hmvc/wiki/Home
 * for more detail on the HMVC code used in Bonfire.
 *
 * @package    Bonfire\Core\Controllers
 * @category   Controllers
 * @author     Bonfire Dev Team
 * @link       http://guides.cibonfire.com/helpers/file_helpers.html
 *
 */
class Base_Controller extends MX_Controller
{


  /**
	 * Stores the previously viewed page's complete URL.
	 *
	 * @var string
	 */
	protected $previous_page;

	/**
	 * Stores the page requested. This will sometimes be
	 * different than the previous page if a redirect happened
	 * in the controller.
	 *
	 * @var string
	 */
	protected $requested_page;

	/**
	 * Stores the current user's details, if they've logged in.
	 *
	 * @var object
	 */
	protected $current_user = NULL;

	//--------------------------------------------------------------------

	/**
	 * Class constructor
	 *
	 */
	public function __construct()
	{
		Events::trigger('before_controller', get_class($this));

		parent::__construct();

		// Load Activity Model Since it's used everywhere.
		$this->load->model('activities/Activity_model', 'activity_model');

		$this->set_current_user();

		// load the application lang file here so that the users language is known
		$this->lang->load('application');

		/*
			Performance optimizations for production environments.
		*/
		if (ENVIRONMENT == 'production')
		{
		    $this->db->save_queries = FALSE;

		    $this->load->driver('cache', array('adapter' => 'apc', 'backup' => 'file'));
		}

		// Testing niceties...
		else if (ENVIRONMENT == 'testing')
		{
			$this->load->driver('cache', array('adapter' => 'apc', 'backup' => 'file'));
		}

		// Development niceties...
		else if (ENVIRONMENT == 'development')
		{
			if ($this->settings_lib->item('site.show_front_profiler'))
			{
				// Profiler bar?
				if ( ! $this->input->is_cli_request() AND ! $this->input->is_ajax_request())
				{
					$this->load->library('Console');
					$this->output->enable_profiler(TRUE);
				}

			}

			$this->load->driver('cache', array('adapter' => 'dummy'));
		}

		// Auto-migrate our core and/or app to latest version.
		if ($this->config->item('migrate.auto_core') || $this->config->item('migrate.auto_app'))
		{
			$this->load->library('migrations/migrations');
			$this->migrations->auto_latest();
		}

		// Make sure no assets in up as a requested page or a 404 page.
		if ( ! preg_match('/\.(gif|jpg|jpeg|png|css|js|ico|shtml)$/i', $this->uri->uri_string()))
		{
			$this->previous_page = $this->session->userdata('previous_page');
			$this->requested_page = $this->session->userdata('requested_page');
		}

		// Pre-Controller Event
		Events::trigger('after_controller_constructor', get_class($this));
	}//end __construct()

	//--------------------------------------------------------------------

	/**
	 * If the Auth lib is loaded, it will set the current user, since users
	 * will never be needed if the Auth library is not loaded. By not requiring
	 * this to be executed and loaded for every command, we can speed up calls
	 * that don't need users at all, or rely on a different type of auth, like
	 * an API or cronjob.
	 */
	protected function set_current_user()
	{
		if (class_exists('Auth'))
		{
			// Load our current logged in user for convenience
			if ($this->auth->is_logged_in())
			{
				$this->current_user = clone $this->auth->user();

				$this->current_user->user_img = gravatar_link($this->current_user->email, 22, $this->current_user->email, "{$this->current_user->email} Profile");

				// if the user has a language setting then use it
				if (isset($this->current_user->language))
				{
					$this->config->set_item('language', $this->current_user->language);
				}
			}

			// Make the current user available in the views
			if (!class_exists('Template'))
			{
				$this->load->library('Template');
			}
			Template::set('current_user', $this->current_user);
		}
	}

	//--------------------------------------------------------------------


}//end Base_Controller


//--------------------------------------------------------------------

/**
 * Front Controller
 *
 * This class provides a common place to handle any tasks that need to
 * be done for all public-facing controllers.
 *
 * @package    Bonfire\Core\Controllers
 * @category   Controllers
 * @author     Bonfire Dev Team
 * @link       http://guides.cibonfire.com/helpers/file_helpers.html
 *
 */
class Front_Controller extends Base_Controller
{

	//--------------------------------------------------------------------

	/**
	 * Class constructor
	 *
	 */
	public function __construct()
	{
		parent::__construct();

		Events::trigger('before_front_controller');

		$this->load->library('template');
		$this->load->library('assets');

		$this->set_current_user();

		Events::trigger('after_front_controller');
	}//end __construct()

	//--------------------------------------------------------------------

}//end Front_Controller


//--------------------------------------------------------------------

/**
 * Authenticated Controller
 *
 * Provides a base class for all controllers that must check user login
 * status.
 *
 * @package    Bonfire\Core\Controllers
 * @category   Controllers
 * @author     Bonfire Dev Team
 * @link       http://guides.cibonfire.com/helpers/file_helpers.html
 *
 */
class Authenticated_Controller extends Base_Controller
{

	//--------------------------------------------------------------------

	/**
	 * Class constructor setup login restriction and load various libraries
	 *
	 */
	public function __construct()
	{
		parent::__construct();

		$this->load->library('users/auth');

		// Make sure we're logged in.
		$this->auth->restrict();

		$this->set_current_user();

		// Load additional libraries
		$this->load->helper('form');
		$this->load->library('form_validation');
		$this->form_validation->set_error_delimiters('', '');
		$this->form_validation->CI =& $this;	// Hack to make it work properly with HMVC
	}//end construct()

	//--------------------------------------------------------------------


}//end Authenticated_Controller


//--------------------------------------------------------------------

/**
 * Admin Controller
 *
 * This class provides a base class for all admin-facing controllers.
 * It automatically loads the form, form_validation and pagination
 * helpers/libraries, sets defaults for pagination and sets our
 * Admin Theme.
 *
 * @package    Bonfire
 * @subpackage MY_Controller
 * @category   Controllers
 * @author     Bonfire Dev Team
 * @link       http://guides.cibonfire.com/helpers/file_helpers.html
 *
 */
class Admin_Controller extends Authenticated_Controller
{
	protected $pager;
	protected $limit;

	//--------------------------------------------------------------------

	/**
	 * Class constructor - setup paging and keyboard shortcuts as well as
	 * load various libraries
	 *
	 */
	public function __construct()
	{
		parent::__construct();

		$this->load->library('template');
		$this->load->library('assets');
		$this->load->library('ui/contexts');

		// Pagination config
		$this->pager = array(
			'full_tag_open'     => '<div class="pagination pagination-right"><ul>',
			'full_tag_close'    => '</ul></div>',
			'next_link'         => '&rarr;',
			'prev_link'         => '&larr;',
			'next_tag_open'     => '<li>',
			'next_tag_close'    => '</li>',
			'prev_tag_open'     => '<li>',
			'prev_tag_close'    => '</li>',
			'first_tag_open'    => '<li>',
			'first_tag_close'   => '</li>',
			'last_tag_open'     => '<li>',
			'last_tag_close'    => '</li>',
			'cur_tag_open'      => '<li class="active"><a href="#">',
			'cur_tag_close'     => '</a></li>',
			'num_tag_open'      => '<li>',
			'num_tag_close'     => '</li>',
		);
		$this->limit = $this->settings_lib->item('site.list_limit');

		// load the keyboard shortcut keys
		$shortcut_data = array(
			'shortcuts' => config_item('ui.current_shortcuts'),
			'shortcut_keys' => $this->settings_lib->find_all_by('module', 'core.ui'),
		);
		Template::set('shortcut_data', $shortcut_data);

		// Profiler Bar?
		if (ENVIRONMENT == 'development')
		{
			if ($this->settings_lib->item('site.show_profiler') AND has_permission('Bonfire.Profiler.View'))
			{
				// Profiler bar?
				if ( ! $this->input->is_cli_request() AND ! $this->input->is_ajax_request())
				{
					$this->load->library('Console');
					$this->output->enable_profiler(TRUE);
				}
			}
		}

		// Basic setup
		Template::set_theme($this->config->item('template.admin_theme'), 'junk');
	}//end construct()

/*  Allow access to files in module assets folder
    <link rel="stylesheet" type="text/css" href="./module_name/assets/css/deploy.css" />
    <img src="./module_name/assets/img/bootstrap-mdo-sfmoma-03.jpg">
*/
    function assets() {

        //---get working directory and map it to your module
        $word = 'public';
        $string = getcwd();
        $string = str_replace($word, "", $string);
        $parts = $this->uri->segments;
        $file = $string . 'application/modules/' . $parts[3] .'/'. $parts[4] .'/'. $parts[5] .'/'. $parts[6];
        $path_parts = pathinfo($file);

        //---set the type for the headers
        $file_type=  strtolower($path_parts['extension']);

        if (is_file($file)) {
            //----write propper headers
            switch ($file_type) {
                case 'css':
                    header('Content-type: text/css');
                    break;

                case 'js':
                    header('Content-type: text/javascript');
                    break;

                case 'json':
                    header('Content-type: application/json');
                    break;

                case 'xml':
                    header('Content-type: text/xml');
                    break;

                case 'pdf':
                    header('Content-type: application/pdf');
                    break;

                case 'jpg' || 'jpeg' || 'png' || 'gif':
                    header('Content-type: image/'.$file_type);
                    readfile($file);
                    exit;
                    break;
            }

            include $file;
        } else {
            show_404();
        }
        exit;
    }

	//--------------------------------------------------------------------

}//end Admin_Controller

/* End of file MY_Controller.php */
/* Location: ./application/core/MY_Controller.php */