<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
// Code here is run before ALL controllers
class MY_Controller extends Controller {
 
	var $module;
	var $controller;
	var $method;
 
	function MY_Controller() {
 
		parent::Controller();
 
        // Make sure we have the user module
        if( ! is_module('users') )
        {
        	show_error('The user module is missing.');
        }
        
        else
        {
	        // Load the user model and get user data
	        $this->load->module_model('users', 'users_m');
	        $this->load->module_library('users', 'user_lib');
 
	        $this->data->user =& $this->user_lib->user_data;
        }
        
        
        // Work out module, controller and method and make them accessable throught the CI instance
        $this->module 				= str_replace(array('modules/', '/'), '', $this->matchbox->fetch_module());
        $this->controller			= strtolower(get_class($this));
        $s 							= $this->uri->rsegment_array();
        $n 							= array_search($this->controller, $s);
        $this->method 				= $this->uri->rsegment($n+1);
 
		// Get meta data for the module
        $this->module_data 			= $this->modules_m->getModule($this->module);
        
        // Make them available to all layout files
        $this->data->module_data	=& $this->module_data;
        
        $this->data->module 		=& $this->module;
        $this->data->controller 	=& $this->controller;
        $this->data->method 		=& $this->method;
	}
}
 
// Code here is run before frontend controllers
class Public_Controller extends MY_Controller {
    
	function Public_Controller() {
        
		parent::MY_Controller();
        
        // Check the frontend hasnt been disabled by an admin
        if(!$this->settings->item('frontend_enabled'))
        {
        	$error = $this->settings->item('unavailable_message') ? $this->settings->item('unavailable_message') : 'Fatal error, is CMS installed?';
        	show_error($this->settings->item('unavailable_message'));
        }
        
        // -- Navigation menu -----------------------------------
        $this->load->module_model('pages', 'pages_m');
        $this->load->module_model('navigation', 'navigation_m');
        
        $this->data->navigation = $this->cache->call('navigation_m', 'frontendNavigation', array(), $this->settings->item('navigation_cache'));
 
        // Set the theme view folder
        $this->data->theme_view_folder = '../themes/'.$this->settings->item('default_theme').'/views/';
        $this->layout->layout_file = $this->data->theme_view_folder.'layout.php';
        
        // Make sure whatever page the user loads it by, its telling Google the correct formatted URL
        $this->layout->set_metadata('canonical', site_url($this->uri->uri_string()), 'link');
        
        // If there is a news module, link to its RSS feed in the head
        if(is_module('news'))
        {
			$this->layout->extra_head('<link rel="alternate" type="application/rss+xml" title="'.$this->settings->item('site_name').'" href="'.site_url('news/rss/all|rss').'" />');
        }
 
    	//$this->output->enable_profiler(TRUE);
    }
 
}
 
 
// Code here is run before admin controllers
class Admin_Controller extends MY_Controller {
    
	function Admin_Controller() {
        
		parent::MY_Controller();
        
        $allow_access = FALSE;
        	
        // These pages get past permission checks
        $ignored_pages = array('admin/login', 'admin/logout');
 
        // Check if the current page is to be ignored
        $current_page = $this->uri->segment(1, '') . '/' . $this->uri->segment(2, '');
        $is_ignored_page = in_array($current_page, $ignored_pages);
        
        // Check the user is an admin
        $is_admin = $this->user_lib->check_role('admin');
        
        // Login: If not logged in and its not an ignored page, force login
        if( ! $this->data->user && ! $is_ignored_page)
        {
        	redirect('admin/login');
        }
        
        // Logged in or ignored page
        else
        {
        	$allow_access = TRUE;
        }
        
        // We are looking at the index page. Show it if they have ANY admin access at all
        if( in_array($current_page, array('admin/', 'admin/index')) && $this->permissions_m->hasAdminAccess($this->data->user->role) )
        {
        	$allow_access = TRUE;
        }
        
        // Check Perms: Not an admin and this is not a page to ignore
        elseif( ! $is_admin && ! $is_ignored_page )
        {
	        // Check if the current user can view that page
	        $location = array( 'module'=>$this->module, 'controller'=>$this->controller, 'method'=>$this->method );
	        $allow_access = $this->permissions_m->checkRuleByRole( $this->data->user->role, $location );
        }
        
        // Show error and exit if the user does not have sufficient permissions
        if( ! $allow_access )
        {
	        show_error('You do not have sufficient permissions to view this page.');
	        exit;
        }
 
        // TODO: PJS I do not think this cache is working. Got bored and went to the pub...
        // Get a list of all modules available to this role
        if($current_page != 'admin/login')
        {
	        $this->data->admin_modules = $this->cache->call('modules_m', 'getModules', array(
	        	array('is_backend'=>true, 'role' => @$this->data->user->role) // This function does NOT need role, that is to keep caching seperate
	        ));
		}
        
        $this->data->toolbar = $this->modules_m->getModuleToolbar($this->module);
        
        $this->layout->layout_file = 'admin/layout.php';
    	
        //$this->output->enable_profiler(TRUE);
    }
    
}
 
?>