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<?php |
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/** |
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* Copyright 2016 - 2018, Cake Development Corporation (http://cakedc.com) |
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* |
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* Licensed under The MIT License |
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* Redistributions of files must retain the above copyright notice. |
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* |
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* @copyright Copyright 2016 - 2018, Cake Development Corporation (http://cakedc.com) |
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php) |
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*/ |
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/** |
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org) |
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* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org) |
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* |
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* Licensed under The MIT License |
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* For full copyright and license information, please see the LICENSE.txt |
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* Redistributions of files must retain the above copyright notice. |
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* |
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* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org) |
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* @link http://cakephp.org CakePHP(tm) Project |
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* @since 0.10.0 |
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* @license http://www.opensource.org/licenses/mit-license.php MIT License |
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*/ |
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namespace CakeDC\Api\Service\Auth; |
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use Cake\Controller\Component\AuthComponent; |
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use Cake\Core\App; |
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use Cake\Core\Exception\Exception; |
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use Cake\Utility\Hash; |
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/** |
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* Class AuthenticateTrait |
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* |
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* @package CakeDC\Api\Service\Auth |
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*/ |
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trait AuthenticateTrait |
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{ |
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/** |
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* Objects that will be used for authentication checks. |
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* |
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* @var array |
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*/ |
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protected $_authenticateObjects = []; |
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/** |
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* The instance of the Authenticate provider that was used for |
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* successfully logging in the current user after calling `login()` |
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* in the same request |
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* |
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* @var \Cake\Auth\BaseAuthenticate |
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*/ |
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protected $_authenticationProvider; |
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/** |
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* Get the current user from storage. |
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* |
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* @param string|null $key Field to retrieve. Leave null to get entire User record. |
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* @return mixed|null Either User record or null if no user is logged in, or retrieved field if key is specified. |
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*/ |
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public function user($key = null) |
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{ |
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$user = $this->storage()->read(); |
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if (!$user) { |
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return null; |
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} |
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if ($key === null) { |
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return $user; |
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} |
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return Hash::get($user, $key); |
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} |
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/** |
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* Set provided user info to storage as logged in user. |
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* |
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* The storage class is configured using `storage` config key or passing |
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* instance to AuthComponent::storage(). |
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* |
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* @param array $user Array of user data. |
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* @return void |
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*/ |
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public function setUser(array $user) |
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{ |
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$this->storage()->write($user); |
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} |
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/** |
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* connected authentication objects will have their |
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* getUser() methods called. |
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* |
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* This lets stateless authentication methods function correctly. |
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* |
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* @return bool true If a user can be found, false if one cannot. |
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*/ |
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protected function _getUser() |
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{ |
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$user = $this->user(); |
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if ($user) { |
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$this->storage()->redirectUrl(false); |
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return true; |
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} |
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if (empty($this->_authenticateObjects)) { |
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$this->constructAuthenticate(); |
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} |
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foreach ($this->_authenticateObjects as $auth) { |
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$result = $auth->getUser($this->request); |
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if (!empty($result) && is_array($result)) { |
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$this->_authenticationProvider = $auth; |
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$event = $this->dispatchEvent('Auth.afterIdentify', [$result, $auth]); |
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if ($event->result !== null) { |
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$result = $event->result; |
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} |
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$this->storage()->write($result); |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Use the configured authentication adapters, and attempt to identify the user |
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* by credentials contained in $request. |
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* |
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* Triggers `Auth.afterIdentify` event which the authenticate classes can listen |
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* to. |
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* |
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* @return array|bool User record data, or false, if the user could not be identified. |
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*/ |
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public function identify() |
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{ |
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// $this->_setDefaults(); |
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if (empty($this->_authenticateObjects)) { |
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$this->constructAuthenticate(); |
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} |
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foreach ($this->_authenticateObjects as $auth) { |
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$result = $auth->authenticate($this->request, $this->response); |
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if (!empty($result) && is_array($result)) { |
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$this->_authenticationProvider = $auth; |
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$event = $this->dispatchEvent('Auth.afterIdentify', [$result, $auth]); |
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if ($event->result !== null) { |
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return $event->result; |
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} |
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return $result; |
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} |
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} |
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return false; |
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} |
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/** |
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* Loads the configured authentication objects. |
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* |
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* @return array|null The loaded authorization objects, or null on empty authenticate value. |
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* @throws \Cake\Core\Exception\Exception |
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*/ |
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public function constructAuthenticate() |
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{ |
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if (empty($this->_config['authenticate'])) { |
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return null; |
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} |
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$this->_authenticateObjects = []; |
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$authenticate = Hash::normalize((array)$this->_config['authenticate']); |
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$global = []; |
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if (isset($authenticate[AuthComponent::ALL])) { |
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$global = $authenticate[AuthComponent::ALL]; |
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unset($authenticate[AuthComponent::ALL]); |
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} |
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foreach ($authenticate as $alias => $config) { |
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if (!empty($config['className'])) { |
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$class = $config['className']; |
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unset($config['className']); |
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} else { |
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$class = $alias; |
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} |
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$className = App::className($class, 'Service/Auth/Authenticate', 'Authenticate'); |
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if (!class_exists($className)) { |
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throw new Exception(sprintf('Authentication adapter "%s" was not found.', $class)); |
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} |
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if (!method_exists($className, 'authenticate')) { |
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throw new Exception('Authentication objects must implement an authenticate() method.'); |
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} |
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$config = array_merge($global, (array)$config); |
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$this->_authenticateObjects[$alias] = new $className($this->_action, $config); |
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$this->getEventManager()->on($this->_authenticateObjects[$alias]); |
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} |
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return $this->_authenticateObjects; |
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} |
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/** |
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* Getter for authenticate objects. Will return a particular authenticate object. |
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* |
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* @param string $alias Alias for the authenticate object |
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* |
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* @return \Cake\Auth\BaseAuthenticate|null |
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*/ |
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public function getAuthenticate($alias) |
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{ |
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if (empty($this->_authenticateObjects)) { |
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$this->constructAuthenticate(); |
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} |
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return isset($this->_authenticateObjects[$alias]) ? $this->_authenticateObjects[$alias] : null; |
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} |
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/** |
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* If login was called during this request and the user was successfully |
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* authenticated, this function will return the instance of the authentication |
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* object that was used for logging the user in. |
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* |
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* @return \Cake\Auth\BaseAuthenticate|null |
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*/ |
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public function authenticationProvider() |
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{ |
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return $this->_authenticationProvider; |
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} |
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} |
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This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idable
provides a methodequalsId
that in turn relies on the methodgetId()
. If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()
as an abstract method to the trait will make sure it is available.