<?php

/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_OpenId
 * @subpackage Zend_OpenId_Provider
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Storage.php 16212 2009-06-21 19:24:49Z thomas $
 */

/**
 * Abstract class to implement external storage for OpenID consumer
 *
 * @category   Zend
 * @package    Zend_OpenId
 * @subpackage Zend_OpenId_Provider
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
abstract class Zend_OpenId_Provider_Storage
{

    /**
     * Stores information about session identified by $handle
     *
     * @param string $handle assiciation handle
     * @param string $macFunc HMAC function (sha1 or sha256)
     * @param string $secret shared secret
     * @param string $expires expiration UNIX time
     * @return void
     */
    abstract public function addAssociation($handle, $macFunc, $secret, $expires);

    /**
     * Gets information about association identified by $handle
     * Returns true if given association found and not expired and false
     * otherwise
     *
     * @param string $handle assiciation handle
     * @param string &$macFunc HMAC function (sha1 or sha256)
     * @param string &$secret shared secret
     * @param string &$expires expiration UNIX time
     * @return bool
     */
    abstract public function getAssociation($handle, &$macFunc, &$secret, &$expires);

    /**
     * Register new user with given $id and $password
     * Returns true in case of success and false if user with given $id already
     * exists
     *
     * @param string $id user identity URL
     * @param string $password encoded user password
     * @return bool
     */
    abstract public function addUser($id, $password);

    /**
     * Returns true if user with given $id exists and false otherwise
     *
     * @param string $id user identity URL
     * @return bool
     */
    abstract public function hasUser($id);

    /**
     * Verify if user with given $id exists and has specified $password
     *
     * @param string $id user identity URL
     * @param string $password user password
     * @return bool
     */
    abstract public function checkUser($id, $password);

    /**
     * Returns array of all trusted/untrusted sites for given user identified
     * by $id
     *
     * @param string $id user identity URL
     * @return array
     */
    abstract public function getTrustedSites($id);

    /**
     * Stores information about trusted/untrusted site for given user
     *
     * @param string $id user identity URL
     * @param string $site site URL
     * @param mixed $trusted trust data from extensions or just a boolean value
     * @return bool
     */
    abstract public function addSite($id, $site, $trusted);
}