added default acl.php in app/Config

app/Config/acl.php

@@ -0,0 +1,134 @@
+<?php
+/**
+ * This is the PHP base ACL configuration file.
+ *
+ * Use it to configure access control of your Cake application.
+ *
+ * PHP 5
+ *
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @package       app.Config
+ * @since         CakePHP(tm) v 2.1
+ * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
+ */
+
+/**
+ * Example
+ * -------
+ * 
+ * Assumptions:
+ *
+ * 1. In your application you created a User model with the following properties: 
+ *    username, group_id, password, email, firstname, lastname and so on.
+ * 2. You configured AuthComponent to authorize actions via 
+ *    $this->Auth->authorize = array('Actions' => array('actionPath' => 'controllers/'),...) 
+ * 
+ * Now, when a user (i.e. jeff) authenticates successfully and requests a controller action (i.e. /invoices/edit)
+ * that is not allowed by default (e.g. via $this->Auth->allow('edit') in the Invoices controller) then AuthComponent 
+ * will ask the configured ACL interface if access is granted. Under the assumptions 1. and 2. this will be 
+ * done via a call to Acl->check() with 
+ *
+ *    array('User' => array('username' => 'jeff', 'group_id' => 4, ...))
+ *
+ * as ARO and
+ *
+ *    '/controllers/invoices/delete'
+ *
+ * as ACO.
+ * 
+ * If the configured map looks like
+ *
+ *    $config['map'] = array(
+ *       'User' => 'User/username',
+ *       'Role' => 'User/group_id',
+ *    );
+ *
+ * then PhpAcl will lookup if we defined a role like User/jeff. If that role is not found, PhpAcl will try to 
+ * find a definition for Role/4. If the definition isn't found then a default role (Role/default) will be used to 
+ * check rules for the given ACO. The search can be expanded by defining aliases in the alias configuration.
+ * E.g. if you want to use a more readable name than Role/4 in your definitions you can define an alias like
+ *
+ *    $config['alias'] = array(
+ *       'Role/4' => 'Role/editor',
+ *    );
+ * 
+ * In the roles configuration you can define roles on the lhs and inherited roles on the rhs:
+ * 
+ *    $config['roles'] = array(
+ *       'Role/admin' => null,
+ *       'Role/accountant' => null,
+ *       'Role/editor' => null,
+ *       'Role/manager' => 'Role/editor, Role/accountant',
+ *       'User/jeff' => 'Role/manager',
+ *    );
+ * 
+ * In this example manager inherits all rules from editor and accountant. Role/admin doesn't inherit from any role.
+ * Lets define some rules:
+ *
+ *    $config['rules'] = array(
+ *       'allow' => array(
+ *       	'*' => 'Role/admin',
+ *       	'controllers/users/(dashboard|profile)' => 'Role/default',
+ *       	'controllers/invoices/*' => 'Role/accountant',
+ *       	'controllers/articles/*' => 'Role/editor',
+ *       	'controllers/users/*'  => 'Role/manager',
+ *       	'controllers/invoices/delete'  => 'Role/manager',
+ *       ),
+ *       'deny' => array(
+ *       	'controllers/invoices/delete' => 'Role/accountant, User/jeff',
+ *       	'controllers/articles/(delete|publish)' => 'Role/editor',
+ *       ),
+ *    );
+ *
+ * Ok, so as jeff inherits from Role/manager he's matched every rule that references User/jeff, Role/manager, 
+ * Role/editor, Role/accountant and Role/default. However, for jeff, rules for User/jeff are more specific than 
+ * rules for Role/manager, rules for Role/manager are more specific than rules for Role/editor and so on.
+ * This is important when allow and deny rules match for a role. E.g. Role/accountant is allowed 
+ * controllers/invoices/* but at the same time controllers/invoices/delete is denied. But there is a more
+ * specific rule defined for Role/manager which is allowed controllers/invoices/delete. However, the most specific
+ * rule denies access to the delete action explicitly for User/jeff, so he'll be denied access to the resource.
+ *
+ * If we would remove the role definition for User/jeff, then jeff would be granted access as he would be resolved
+ * to Role/manager and Role/manager has an allow rule.
+ */
+
+/**
+ * The role map defines how to resolve the user record from your application
+ * to the roles you defined in the roles configuration. 
+ */
+$config['map'] = array(
+	'User' => 'User/username',
+	'Role' => 'User/group_id',
+);
+
+/**
+ * define aliases to map your model information to
+ * the roles defined in your role configuration.
+ */
+$config['alias'] = array(
+	'Role/4' => 'Role/editor',
+);
+
+/**
+ * role configuration
+ */
+$config['roles'] = array(
+	'Role/admin' => null,
+);
+
+/**
+ * rule configuration
+ */
+$config['rules'] = array(
+	'allow' => array(
+		'*' => 'Role/admin',
+	),
+	'deny' => array(),
+);