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