170 lines
4.0 KiB
PHP
170 lines
4.0 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Auth
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Auth.php 18951 2009-11-12 16:26:19Z alexander $
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*/
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/**
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* @category Zend
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* @package Zend_Auth
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Auth
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{
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/**
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* Singleton instance
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*
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* @var Zend_Auth
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*/
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protected static $_instance = null;
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/**
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* Persistent storage handler
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*
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* @var Zend_Auth_Storage_Interface
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*/
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protected $_storage = null;
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/**
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* Singleton pattern implementation makes "new" unavailable
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*
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* @return void
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*/
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protected function __construct()
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{}
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/**
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* Singleton pattern implementation makes "clone" unavailable
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*
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* @return void
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*/
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protected function __clone()
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{}
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/**
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* Returns an instance of Zend_Auth
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*
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* Singleton pattern implementation
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*
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* @return Zend_Auth Provides a fluent interface
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*/
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public static function getInstance()
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{
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if (null === self::$_instance) {
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self::$_instance = new self();
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}
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return self::$_instance;
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}
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/**
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* Returns the persistent storage handler
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*
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* Session storage is used by default unless a different storage adapter has been set.
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*
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* @return Zend_Auth_Storage_Interface
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*/
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public function getStorage()
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{
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if (null === $this->_storage) {
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/**
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* @see Zend_Auth_Storage_Session
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*/
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require_once 'Zend/Auth/Storage/Session.php';
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$this->setStorage(new Zend_Auth_Storage_Session());
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}
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return $this->_storage;
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}
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/**
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* Sets the persistent storage handler
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*
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* @param Zend_Auth_Storage_Interface $storage
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* @return Zend_Auth Provides a fluent interface
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*/
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public function setStorage(Zend_Auth_Storage_Interface $storage)
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{
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$this->_storage = $storage;
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return $this;
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}
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/**
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* Authenticates against the supplied adapter
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*
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* @param Zend_Auth_Adapter_Interface $adapter
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* @return Zend_Auth_Result
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*/
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public function authenticate(Zend_Auth_Adapter_Interface $adapter)
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{
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$result = $adapter->authenticate();
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/**
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* ZF-7546 - prevent multiple succesive calls from storing inconsistent results
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* Ensure storage has clean state
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*/
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if ($this->hasIdentity()) {
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$this->clearIdentity();
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}
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if ($result->isValid()) {
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$this->getStorage()->write($result->getIdentity());
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}
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return $result;
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}
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/**
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* Returns true if and only if an identity is available from storage
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*
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* @return boolean
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*/
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public function hasIdentity()
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{
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return !$this->getStorage()->isEmpty();
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}
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/**
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* Returns the identity from storage or null if no identity is available
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*
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* @return mixed|null
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*/
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public function getIdentity()
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{
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$storage = $this->getStorage();
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if ($storage->isEmpty()) {
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return null;
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}
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return $storage->read();
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}
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/**
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* Clears the identity from persistent storage
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*
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* @return void
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*/
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public function clearIdentity()
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{
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$this->getStorage()->clear();
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}
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}
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