<?php



/**

 * ECSHOP SESSION 公用类库

 * ============================================================================

 * 版权所有 2005-2010 上海商派网络科技有限公司，并保留所有权利。

 * 网站地址: http://www.ecshop.com；

 * ----------------------------------------------------------------------------

 * 这不是一个自由软件！您只能在不用于商业目的的前提下对程序代码进行修改和

 * 使用；不允许对程序代码以任何形式任何目的的再发布。

 * ============================================================================

 * $Author: liuhui $

 * $Id: cls_session.php 17063 2010-03-25 06:35:46Z liuhui $

*/



if (!defined('IN_ECS'))

{

    die('Hacking attempt');

}



class cls_session

{

    var $db             = NULL;

    var $session_table  = '';



    var $max_life_time  = 1800; // SESSION 过期时间



    var $session_name   = '';

    var $session_id     = '';



    var $session_expiry = '';

    var $session_md5    = '';



    var $session_cookie_path   = '/';

    var $session_cookie_domain = '';

    var $session_cookie_secure = false;



    var $_ip   = '';

    var $_time = 0;



    function __construct(&$db, $session_table, $session_data_table, $session_name = 'ECS_ID', $session_id = '')

    {

        $this->cls_session($db, $session_table, $session_data_table, $session_name, $session_id);

    }



    function cls_session(&$db, $session_table, $session_data_table, $session_name = 'ECS_ID', $session_id = '')

    {

        $GLOBALS['_SESSION'] = array();



        if (!empty($GLOBALS['cookie_path']))

        {

            $this->session_cookie_path = $GLOBALS['cookie_path'];

        }

        else

        {

            $this->session_cookie_path = '/';

        }



        if (!empty($GLOBALS['cookie_domain']))

        {

            $this->session_cookie_domain = $GLOBALS['cookie_domain'];

        }

        else

        {

            $this->session_cookie_domain = '';

        }



        if (!empty($GLOBALS['cookie_secure']))

        {

            $this->session_cookie_secure = $GLOBALS['cookie_secure'];

        }

        else

        {

            $this->session_cookie_secure = false;

        }



        $this->session_name       = $session_name;

        $this->session_table      = $session_table;

        $this->session_data_table = $session_data_table;



        $this->db  = &$db;

        $this->_ip = real_ip();



        if ($session_id == '' && !empty($_COOKIE[$this->session_name]))

        {

            $this->session_id = $_COOKIE[$this->session_name];

        }

        else

        {

            $this->session_id = $session_id;

        }



        if ($this->session_id)

        {

            $tmp_session_id = substr($this->session_id, 0, 32);

            if ($this->gen_session_key($tmp_session_id) == substr($this->session_id, 32))

            {

                $this->session_id = $tmp_session_id;

            }

            else

            {

                $this->session_id = '';

            }

        }



        $this->_time = time();



        if ($this->session_id)

        {

            $this->load_session();

        }

        else

        {

            $this->gen_session_id();



            setcookie($this->session_name, $this->session_id . $this->gen_session_key($this->session_id), 0, $this->session_cookie_path, $this->session_cookie_domain, $this->session_cookie_secure);

        }



        register_shutdown_function(array(&$this, 'close_session'));

    }



    function gen_session_id()

    {

        $this->session_id = md5(uniqid(mt_rand(), true));



        return $this->insert_session();

    }



    function gen_session_key($session_id)

    {

        static $ip = '';



        if ($ip == '')

        {

            $ip = substr($this->_ip, 0, strrpos($this->_ip, '.'));

        }



        return sprintf('%08x', crc32(!empty($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] . ROOT_PATH . $ip . $session_id : ROOT_PATH . $ip . $session_id));

    }



    function insert_session()

    {

        return $this->db->query('INSERT INTO ' . $this->session_table . " (sesskey, expiry, ip, data) VALUES ('" . $this->session_id . "', '". $this->_time ."', '". $this->_ip ."', 'a:0:{}')");

    }



    function load_session()

    {

        $session = $this->db->getRow('SELECT userid, adminid, user_name, user_rank, discount, email, data, expiry FROM ' . $this->session_table . " WHERE sesskey = '" . $this->session_id . "'");

        if (empty($session))

        {

            $this->insert_session();



            $this->session_expiry = 0;

            $this->session_md5    = '40cd750bba9870f18aada2478b24840a';

            $GLOBALS['_SESSION']  = array();

        }

        else

        {

            if (!empty($session['data']) && $this->_time - $session['expiry'] <= $this->max_life_time)

            {

                $this->session_expiry = $session['expiry'];

                $this->session_md5    = md5($session['data']);

                $GLOBALS['_SESSION']  = unserialize($session['data']);

                $GLOBALS['_SESSION']['user_id'] = $session['userid'];

                $GLOBALS['_SESSION']['admin_id'] = $session['adminid'];

                $GLOBALS['_SESSION']['user_name'] = $session['user_name'];

                $GLOBALS['_SESSION']['user_rank'] = $session['user_rank'];

                $GLOBALS['_SESSION']['discount'] = $session['discount'];

                $GLOBALS['_SESSION']['email'] = $session['email'];

            }

            else

            {

                $session_data = $this->db->getRow('SELECT data, expiry FROM ' . $this->session_data_table . " WHERE sesskey = '" . $this->session_id . "'");

                if (!empty($session_data['data']) && $this->_time - $session_data['expiry'] <= $this->max_life_time)

                {

                    $this->session_expiry = $session_data['expiry'];

                    $this->session_md5    = md5($session_data['data']);

                    $GLOBALS['_SESSION']  = unserialize($session_data['data']);

                    $GLOBALS['_SESSION']['user_id'] = $session['userid'];

                    $GLOBALS['_SESSION']['admin_id'] = $session['adminid'];

                    $GLOBALS['_SESSION']['user_name'] = $session['user_name'];

                    $GLOBALS['_SESSION']['user_rank'] = $session['user_rank'];

                    $GLOBALS['_SESSION']['discount'] = $session['discount'];

                    $GLOBALS['_SESSION']['email'] = $session['email'];

                }

                else

                {

                    $this->session_expiry = 0;

                    $this->session_md5    = '40cd750bba9870f18aada2478b24840a';

                    $GLOBALS['_SESSION']  = array();

                }

            }

        }

    }



    function update_session()

    {

        $adminid = !empty($GLOBALS['_SESSION']['admin_id']) ? intval($GLOBALS['_SESSION']['admin_id']) : 0;

        $userid  = !empty($GLOBALS['_SESSION']['user_id'])  ? intval($GLOBALS['_SESSION']['user_id'])  : 0;

        $user_name  = !empty($GLOBALS['_SESSION']['user_name'])  ? trim($GLOBALS['_SESSION']['user_name'])  : 0;

        $user_rank  = !empty($GLOBALS['_SESSION']['user_rank'])  ? intval($GLOBALS['_SESSION']['user_rank'])  : 0;

        $discount  = !empty($GLOBALS['_SESSION']['discount'])  ? round($GLOBALS['_SESSION']['discount'], 2)  : 0;

        $email  = !empty($GLOBALS['_SESSION']['email'])  ? trim($GLOBALS['_SESSION']['email'])  : 0;

        unset($GLOBALS['_SESSION']['admin_id']);

        unset($GLOBALS['_SESSION']['user_id']);

        unset($GLOBALS['_SESSION']['user_name']);

        unset($GLOBALS['_SESSION']['user_rank']);

        unset($GLOBALS['_SESSION']['discount']);

        unset($GLOBALS['_SESSION']['email']);



        $data        = serialize($GLOBALS['_SESSION']);

        $this->_time = time();



        if ($this->session_md5 == md5($data) && $this->_time < $this->session_expiry + 10)

        {

            return true;

        }



        $data = addslashes($data);



        if (isset($data{255}))

        {

            $this->db->autoReplace($this->session_data_table, array('sesskey' => $this->session_id, 'expiry' => $this->_time, 'data' => $data), array('data' => $data));



            $data = '';

        }



        return $this->db->query('UPDATE ' . $this->session_table . " SET expiry = '" . $this->_time . "', ip = '" . $this->_ip . "', userid = '" . $userid . "', adminid = '" . $adminid . "', user_name='" . $user_name . "', user_rank='" . $user_rank . "', discount='" . $discount . "', email='" . $email . "', data = '$data' WHERE sesskey = '" . $this->session_id . "' LIMIT 1");

    }



    function close_session()

    {

        $this->update_session();



        /* 随机对 sessions_data 的库进行删除操作 */

        if (mt_rand(0, 2) == 2)

        {

            $this->db->query('DELETE FROM ' . $this->session_data_table . ' WHERE expiry < ' . ($this->_time - $this->max_life_time));

        }



        if ((time() % 2) == 0)

        {

            return $this->db->query('DELETE FROM ' . $this->session_table . ' WHERE expiry < ' . ($this->_time - $this->max_life_time));

        }



        return true;

    }



    function delete_spec_admin_session($adminid)

    {

        if (!empty($GLOBALS['_SESSION']['admin_id']) && $adminid)

        {

            return $this->db->query('DELETE FROM ' . $this->session_table . " WHERE adminid = '$adminid'");

        }

        else

        {

            return false;

        }

    }



    function destroy_session()

    {

        $GLOBALS['_SESSION'] = array();



        setcookie($this->session_name, $this->session_id, 1, $this->session_cookie_path, $this->session_cookie_domain, $this->session_cookie_secure);



        /* ECSHOP 自定义执行部分 */

        if (!empty($GLOBALS['ecs']))

        {

            $this->db->query('DELETE FROM ' . $GLOBALS['ecs']->table('cart') . " WHERE session_id = '$this->session_id'");

        }

        /* ECSHOP 自定义执行部分 */



        $this->db->query('DELETE FROM ' . $this->session_data_table . " WHERE sesskey = '" . $this->session_id . "' LIMIT 1");



        return $this->db->query('DELETE FROM ' . $this->session_table . " WHERE sesskey = '" . $this->session_id . "' LIMIT 1");

    }



    function get_session_id()

    {

        return $this->session_id;

    }



    function get_users_count()

    {

        return $this->db->getOne('SELECT count(*) FROM ' . $this->session_table);

    }

}



?>