1: <?php
  2: /**
  3:  * PHP 5
  4:  *
  5:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
  6:  * Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
  7:  *
  8:  * Licensed under The MIT License
  9:  * Redistributions of files must retain the above copyright notice.
 10:  *
 11:  * @copyright     Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
 12:  * @link          http://cakephp.org CakePHP(tm) Project
 13:  * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
 14:  */
 15: 
 16: App::uses('BaseAuthorize', 'Controller/Component/Auth');
 17: App::uses('Router', 'Routing');
 18: 
 19: /**
 20:  * An authorization adapter for AuthComponent.  Provides the ability to authorize using CRUD mappings.
 21:  * CRUD mappings allow you to translate controller actions into *C*reate *R*ead *U*pdate *D*elete actions.
 22:  * This is then checked in the AclComponent as specific permissions.
 23:  *
 24:  * For example, taking `/posts/index` as the current request.  The default mapping for `index`, is a `read` permission
 25:  * check. The Acl check would then be for the `posts` controller with the `read` permission.  This allows you
 26:  * to create permission systems that focus more on what is being done to resources, rather than the specific actions
 27:  * being visited.
 28:  *
 29:  * @package       Cake.Controller.Component.Auth
 30:  * @since 2.0
 31:  * @see AuthComponent::$authenticate
 32:  * @see AclComponent::check()
 33:  */
 34: class CrudAuthorize extends BaseAuthorize {
 35: 
 36: /**
 37:  * Sets up additional actionMap values that match the configured `Routing.prefixes`.
 38:  *
 39:  * @param ComponentCollection $collection The component collection from the controller.
 40:  * @param string $settings An array of settings.  This class does not use any settings.
 41:  */
 42:     public function __construct(ComponentCollection $collection, $settings = array()) {
 43:         parent::__construct($collection, $settings);
 44:         $this->_setPrefixMappings();
 45:     }
 46: 
 47: /**
 48:  * sets the crud mappings for prefix routes.
 49:  *
 50:  * @return void
 51:  */
 52:     protected function _setPrefixMappings() {
 53:         $crud = array('create', 'read', 'update', 'delete');
 54:         $map = array_combine($crud, $crud);
 55: 
 56:         $prefixes = Router::prefixes();
 57:         if (!empty($prefixes)) {
 58:             foreach ($prefixes as $prefix) {
 59:                 $map = array_merge($map, array(
 60:                     $prefix . '_index' => 'read',
 61:                     $prefix . '_add' => 'create',
 62:                     $prefix . '_edit' => 'update',
 63:                     $prefix . '_view' => 'read',
 64:                     $prefix . '_remove' => 'delete',
 65:                     $prefix . '_create' => 'create',
 66:                     $prefix . '_read' => 'read',
 67:                     $prefix . '_update' => 'update',
 68:                     $prefix . '_delete' => 'delete'
 69:                 ));
 70:             }
 71:         }
 72:         $this->mapActions($map);
 73:     }
 74: 
 75: /**
 76:  * Authorize a user using the mapped actions and the AclComponent.
 77:  *
 78:  * @param array $user The user to authorize
 79:  * @param CakeRequest $request The request needing authorization.
 80:  * @return boolean
 81:  */
 82:     public function authorize($user, CakeRequest $request) {
 83:         if (!isset($this->settings['actionMap'][$request->params['action']])) {
 84:             trigger_error(__d('cake_dev',
 85:                 'CrudAuthorize::authorize() - Attempted access of un-mapped action "%1$s" in controller "%2$s"',
 86:                 $request->action,
 87:                 $request->controller
 88:                 ),
 89:                 E_USER_WARNING
 90:             );
 91:             return false;
 92:         }
 93:         $user = array($this->settings['userModel'] => $user);
 94:         $Acl = $this->_Collection->load('Acl');
 95:         return $Acl->check(
 96:             $user,
 97:             $this->action($request, ':controller'),
 98:             $this->settings['actionMap'][$request->params['action']]
 99:         );
100:     }
101: }
102: