Merge branch 'master' into permissions

- Added new core controller called Auth_Controller that extends FHC_Controller and manage the authentication
- All the controllers that were extending the CI_Controller now they extend the FHC_Controller
- All the controllers that were extending the FHC_Controller now they extend the Auth_Controller
- Added the method isAllowed to the FiltersLib to check if the authenticated user has the required permissions
- FilterWidget and controller Filters are using the method isAllowed from the FiltersLib

application/core/Auth_Controller.php

@@ -0,0 +1,38 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class Auth_Controller extends FHC_Controller
+{
+	/**
+	 * Extends this controller if authentication is required
+	 */
+    public function __construct($requiredPermissions)
+	{
+        parent::__construct();
+
+		// Loads authentication helper
+		$this->load->helper('fhcauth');
+
+		// Checks if the caller is allowed to access to this content
+		$this->_isAllowed($requiredPermissions);
+	}
+
+	/**
+	 * Checks if the caller is allowed to access to this content with the given permissions
+	 * If it is not allowed will set the HTTP header with code 401
+	 * Wrapper for _checkPermissions
+	 */
+	private function _isAllowed($requiredPermissions)
+	{
+		// Loads permission lib
+		$this->load->library('PermissionLib');
+
+		if (!$this->permissionlib->isEntitled($requiredPermissions, $this->router->method))
+		{
+			header('HTTP/1.0 401 Unauthorized');
+			echo 'You are not allowed to access to this content';
+			exit;
+		}
+	}
+}