<?php

/**

 * MyBB 1.6

 * Copyright 2010 MyBB Group, All Rights Reserved

 *

 * Website: http://mybb.com

 * License: http://mybb.com/about/license

 *

 * $Id: class_session.php 5016 2010-06-12 00:24:02Z RyanGordon $

 */



class session

{

    public $sid = 0;

    public $uid = 0;

    public $ipaddress = '';

    public $useragent = '';

    public $is_spider = false;

    public $logins = 1;

    public $failedlogin = 0;



    /**

     * Initialize a session

     */

    function init()

    {

        global $db, $mybb, $cache;



        // Get our visitor's IP.

        $this->ipaddress = get_ip();



        // Find out the user agent.

        $this->useragent = $_SERVER['HTTP_USER_AGENT'];

        if(my_strlen($this->useragent) > 100)

        {

            $this->useragent = my_substr($this->useragent, 0, 100);

        }

        

        // Attempt to find a session id in the cookies.

        if(isset($mybb->cookies['sid']))

        {

            $this->sid = $db->escape_string($mybb->cookies['sid']);

            // Load the session

            $query = $db->simple_select("sessions", "*", "sid='{$this->sid}' AND ip='".$db->escape_string($this->ipaddress)."'", array('limit' => 1));

            $session = $db->fetch_array($query);

            if($session['sid'])

            {

                $this->sid = $session['sid'];

                $this->uid = $session['uid'];

            }

            else

            {

                $this->sid = 0;

                $this->uid = 0;

                $this->logins = 1;

                $this->failedlogin = 0;

            }

        }



        // Still no session, fall back

        if(!$this->sid)

        {

            $this->sid = 0;

            $this->uid = 0;

            $this->logins = 1;

            $this->failedlogin = 0;

        }



        // If we have a valid session id and user id, load that users session.

        if($mybb->cookies['mybbuser'])

        {

            $logon = explode("_", $mybb->cookies['mybbuser'], 2);

            $this->load_user($logon[0], $logon[1]);

        }



        // If no user still, then we have a guest.

        if(!isset($mybb->user['uid']))

        {

            // Detect if this guest is a search engine spider. (bots don't get a cookied session ID so we first see if that's set)

            if(!$this->sid)

            {

                $spiders = $cache->read("spiders");

                if(is_array($spiders))

                {

                    foreach($spiders as $spider)

                    {

                        if(my_strpos(my_strtolower($this->useragent), my_strtolower($spider['useragent'])) !== false)

                        {

                            $this->load_spider($spider['sid']);

                        }

                    }

                }

            }



            // Still nothing? JUST A GUEST!

            if(!$this->is_spider)

            {

                $this->load_guest();

            }

        }





        // As a token of our appreciation for getting this far (and they aren't a spider), give the user a cookie

        if($this->sid && ($mybb->cookies['sid'] != $this->sid) && $this->is_spider != true)

        {

            my_setcookie("sid", $this->sid, -1, true);

        }

    }



    /**

     * Load a user via the user credentials.

     *

     * @param int The user id.

     * @param string The user's password.

     */

    function load_user($uid, $password='')

    {

        global $mybb, $db, $time, $lang, $mybbgroups, $session, $cache;

        

        // Read the banned cache

        $bannedcache = $cache->read("banned");    

        

        // If the banned cache doesn't exist, update it and re-read it

        if(!is_array($bannedcache))

        {

            $cache->update_banned();

            $bannedcache = $cache->read("banned");

        }

        

        $uid = intval($uid);

        $query = $db->query("

            SELECT u.*, f.*

            FROM ".TABLE_PREFIX."users u 

            LEFT JOIN ".TABLE_PREFIX."userfields f ON (f.ufid=u.uid) 

            WHERE u.uid='$uid'

            LIMIT 1

        ");

        $mybb->user = $db->fetch_array($query);

        

        $this->logins = $mybb->user['loginattempts'];

        $this->failedlogin = $mybb->user['failedlogin'];

        

        if($bannedcache[$uid])

        {

            $banned_user = $bannedcache[$uid];

            $mybb->user['bandate'] = $banned_user['dateline'];

            $mybb->user['banlifted'] = $banned_user['lifted'];

            $mybb->user['banoldgroup'] = $banned_user['oldgroup'];

            $mybb->user['banolddisplaygroup'] = $banned_user['olddisplaygroup'];

            $mybb->user['banoldadditionalgroups'] = $banned_user['oldadditionalgroups'];

        }



        // Check the password if we're not using a session

        if($password != $mybb->user['loginkey'] || !$mybb->user['uid'])

        {

            unset($mybb->user);

            $this->uid = 0;

            return false;

        }

        $this->uid = $mybb->user['uid'];



        // Set the logout key for this user

        $mybb->user['logoutkey'] = md5($mybb->user['loginkey']);



        // Sort out the private message count for this user.

        if(($mybb->user['totalpms'] == -1 || $mybb->user['unreadpms'] == -1) && $mybb->settings['enablepms'] != 0) // Forced recount

        {

            $update = 0;

            if($mybb->user['totalpms'] == -1)

            {

                $update += 1;

            }

            if($mybb->user['unreadpms'] == -1)

            {

                $update += 2;

            }



            require_once MYBB_ROOT."inc/functions_user.php";

            $pmcount = update_pm_count('', $update);

            if(is_array($pmcount))

            {

                $mybb->user = array_merge($mybb->user, $pmcount);

            }

        }

        $mybb->user['pms_total'] = $mybb->user['totalpms'];

        $mybb->user['pms_unread'] = $mybb->user['unreadpms'];



        if($mybb->user['lastip'] != $this->ipaddress && array_key_exists('lastip', $mybb->user))

        {

            $lastip_add .= ", lastip='".$db->escape_string($this->ipaddress)."', longlastip='".intval(my_ip2long($this->ipaddress))."'";

        }



        // If the last visit was over 900 seconds (session time out) ago then update lastvisit.

        $time = TIME_NOW;

        if($time - $mybb->user['lastactive'] > 900)

        {

            $db->shutdown_query("UPDATE ".TABLE_PREFIX."users SET lastvisit='{$mybb->user['lastactive']}', lastactive='$time' {$lastip_add} WHERE uid='{$mybb->user['uid']}'");

            $mybb->user['lastvisit'] = $mybb->user['lastactive'];

            require_once MYBB_ROOT."inc/functions_user.php";

            update_pm_count('', 2);

        }

        else

        {

            $timespent = TIME_NOW - $mybb->user['lastactive'];

            $db->shutdown_query("UPDATE ".TABLE_PREFIX."users SET lastactive='$time', timeonline=timeonline+$timespent {$lastip_add} WHERE uid='{$mybb->user['uid']}'");

        }



        // Sort out the language and forum preferences.

        if($mybb->user['language'] && $lang->language_exists($mybb->user['language']))

        {

            $mybb->settings['bblanguage'] = $mybb->user['language'];

        }

        if($mybb->user['dateformat'] != 0 && $mybb->user['dateformat'] != '')

        {

            global $date_formats;

            if($date_formats[$mybb->user['dateformat']])

            {

                $mybb->settings['dateformat'] = $date_formats[$mybb->user['dateformat']];

            }

        }



        // Choose time format.

        if($mybb->user['timeformat'] != 0 && $mybb->user['timeformat'] != '')

        {

            global $time_formats;

            if($time_formats[$mybb->user['timeformat']])

            {

                $mybb->settings['timeformat'] = $time_formats[$mybb->user['timeformat']];

            }

        }



        // Find out the threads per page preference.

        if($mybb->user['tpp'])

        {

            $mybb->settings['threadsperpage'] = $mybb->user['tpp'];

        }



        // Find out the posts per page preference.

        if($mybb->user['ppp'])

        {

            $mybb->settings['postsperpage'] = $mybb->user['ppp'];

        }

        

        // Does this user prefer posts in classic mode?

        if($mybb->user['classicpostbit'])

        {

            $mybb->settings['postlayout'] = 'classic';

        }

        else

        {

            $mybb->settings['postlayout'] = 'horizontal';

        }



        // Check if this user is currently banned and if we have to lift it.

        if(!empty($mybb->user['bandate']) && (isset($mybb->user['banlifted']) && !empty($mybb->user['banlifted'])) && $mybb->user['banlifted'] < $time)  // hmmm...bad user... how did you get banned =/

        {

            // must have been good.. bans up :D

            $db->shutdown_query("UPDATE ".TABLE_PREFIX."users SET usergroup='".intval($mybb->user['banoldgroup'])."', additionalgroups='".$mybb->user['oldadditionalgroups']."', displaygroup='".intval($mybb->user['olddisplaygroup'])."' WHERE uid='".$mybb->user['uid']."' LIMIT 1");

            $db->shutdown_query("DELETE FROM ".TABLE_PREFIX."banned WHERE uid='".$mybb->user['uid']."'");

            // we better do this..otherwise they have dodgy permissions

            $mybb->user['usergroup'] = $mybb->user['banoldgroup'];

            $mybb->user['displaygroup'] = $mybb->user['banolddisplaygroup'];

            $mybb->user['additionalgroups'] = $mybb->user['banoldadditionalgroups'];

            $cache->update_banned();



            $mybbgroups = $mybb->user['usergroup'];

            if($mybb->user['additionalgroups'])

            {

                $mybbgroups .= ','.$mybb->user['additionalgroups'];

            }

        }

        else if(!empty($mybb->user['bandate']) && (empty($mybb->user['banlifted'])  || !empty($mybb->user['banlifted']) && $mybb->user['banlifted'] > $time))

        {

            $mybbgroups = $mybb->user['usergroup'];

        }

        else

        {

            // Gather a full permission set for this user and the groups they are in.

            $mybbgroups = $mybb->user['usergroup'];

            if($mybb->user['additionalgroups'])

            {

                $mybbgroups .= ','.$mybb->user['additionalgroups'];

            }

        }



        $mybb->usergroup = usergroup_permissions($mybbgroups);

        if(!$mybb->user['displaygroup'])

        {

            $mybb->user['displaygroup'] = $mybb->user['usergroup'];

        }



        $mydisplaygroup = usergroup_displaygroup($mybb->user['displaygroup']);

        if(is_array($mydisplaygroup))

        {

            $mybb->usergroup = array_merge($mybb->usergroup, $mydisplaygroup);

        }

        

        if(!$mybb->user['usertitle'])

        {

            $mybb->user['usertitle'] = $mybb->usergroup['usertitle'];

        }



        // Update or create the session.

        if(!defined("NO_ONLINE"))

        {

            if(!empty($this->sid))

            {

                $this->update_session($this->sid, $mybb->user['uid']);

            }

            else

            {

                $this->create_session($mybb->user['uid']);

            }

        }

        return true;

    }



    /**

     * Load a guest user.

     *

     */

    function load_guest()

    {

        global $mybb, $time, $db, $lang;



        // Set up some defaults

        $time = TIME_NOW;

        $mybb->user['usergroup'] = 1;

        $mybb->user['username'] = '';

        $mybb->user['uid'] = 0;

        $mybbgroups = 1;

        $mybb->user['displaygroup'] = 1;



        // Has this user visited before? Lastvisit need updating?

        if(isset($mybb->cookies['mybb']['lastvisit']))

        {

            if(!isset($mybb->cookies['mybb']['lastactive']))

            {

                $mybb->user['lastactive'] = $time;

                $mybb->cookies['mybb']['lastactive'] = $mybb->user['lastactive'];

            }

            else

            {

                $mybb->user['lastactive'] = intval($mybb->cookies['mybb']['lastactive']);

            }

            if($time - $mybb->cookies['mybb']['lastactive'] > 900)

            {

                my_setcookie("mybb[lastvisit]", $mybb->user['lastactive']);

                $mybb->user['lastvisit'] = $mybb->user['lastactive'];

            }

            else

            {

                $mybb->user['lastvisit'] = intval($mybb->cookies['mybb']['lastactive']);

            }

        }



        // No last visit cookie, create one.

        else

        {

            my_setcookie("mybb[lastvisit]", $time);

            $mybb->user['lastvisit'] = $time;

        }



        // Update last active cookie.

        my_setcookie("mybb[lastactive]", $time);



        // Gather a full permission set for this guest

        $mybb->usergroup = usergroup_permissions($mybbgroups);

        $mydisplaygroup = usergroup_displaygroup($mybb->user['displaygroup']);

        

        $mybb->usergroup = array_merge($mybb->usergroup, $mydisplaygroup);



        // Update the online data.

        if(!defined("NO_ONLINE"))

        {

            if(!empty($this->sid))

            {

                $this->update_session($this->sid);

            }

            else

            {

                $this->create_session();

            }

        }

    }



    /**

     * Load a search engine spider.

     *

     * @param int The ID of the search engine spider

     */

    function load_spider($spider_id)

    {

        global $mybb, $time, $db, $lang;



        // Fetch the spider preferences from the database

        $query = $db->simple_select("spiders", "*", "sid='{$spider_id}'", array('limit' => 1));

        $spider = $db->fetch_array($query);



        // Set up some defaults

        $time = TIME_NOW;

        $this->is_spider = true;

        if($spider['usergroup'])

        {

            $mybb->user['usergroup'] = $spider['usergroup'];

        }

        else

        {

            $mybb->user['usergroup'] = 1;

        }

        $mybb->user['username'] = '';

        $mybb->user['uid'] = 0;

        $mybb->user['displaygroup'] = $mybb->user['usergroup'];



        // Set spider language

        if($spider['language'] && $lang->language_exists($spider['language']))

        {

            $mybb->settings['bblanguage'] = $spider['language'];

        }



        // Set spider theme

        if($spider['theme'])

        {

            $mybb->user['style'] = $spider['theme'];

        }



        // Gather a full permission set for this spider.

        $mybb->usergroup = usergroup_permissions($mybb->user['usergroup']);

        $mydisplaygroup = usergroup_displaygroup($mybb->user['displaygroup']);

        $mybb->usergroup = array_merge($mybb->usergroup, $mydisplaygroup);



        // Update spider last minute (only do so on two minute intervals - decrease load for quick spiders)

        if($spider['lastvisit'] < TIME_NOW-120)

        {

            $updated_spider = array(

                "lastvisit" => TIME_NOW

            );

            $db->update_query("spiders", $updated_spider, "sid='{$spider_id}'", 1);

        }



        // Update the online data.

        if(!defined("NO_ONLINE"))

        {

            $this->sid = "bot=".$spider_id;

            $this->create_session();

        }



    }



    /**

     * Update a user session.

     *

     * @param int The session id.

     * @param int The user id.

     */

    function update_session($sid, $uid='')

    {

        global $db;



        // Find out what the special locations are.

        $speciallocs = $this->get_special_locations();

        if($uid)

        {

            $onlinedata['uid'] = $uid;

        }

        else

        {

            $onlinedata['uid'] = 0;

        }

        $onlinedata['time'] = TIME_NOW;

        $onlinedata['location'] = $db->escape_string(get_current_location());

        $onlinedata['useragent'] = $db->escape_string($this->useragent);

        $onlinedata['location1'] = intval($speciallocs['1']);

        $onlinedata['location2'] = intval($speciallocs['2']);

        $onlinedata['nopermission'] = 0;

        $sid = $db->escape_string($sid);



        $db->update_query("sessions", $onlinedata, "sid='{$sid}'", 1);

    }



    /**

     * Create a new session.

     *

     * @param int The user id to bind the session to.

     */

    function create_session($uid=0)

    {

        global $db;

        $speciallocs = $this->get_special_locations();



        // If there is a proper uid, delete by uid.

        if($uid > 0)

        {

            $db->delete_query("sessions", "uid='{$uid}'");

            $onlinedata['uid'] = $uid;

        }

        // Is a spider - delete all other spider references

        else if($this->is_spider == true)

        {

            $db->delete_query("sessions", "sid='{$this->sid}'");

        }

        // Else delete by ip.

        else

        {

            $db->delete_query("sessions", "ip='".$db->escape_string($this->ipaddress)."'");

            $onlinedata['uid'] = 0;

        }



        // If the user is a search enginge spider, ...

        if($this->is_spider == true)

        {

            $onlinedata['sid'] = $this->sid;

        }

        else

        {

            $onlinedata['sid'] = md5(uniqid(microtime(true)));

        }

        $onlinedata['time'] = TIME_NOW;

        $onlinedata['ip'] = $db->escape_string($this->ipaddress);

        $onlinedata['location'] = $db->escape_string(get_current_location());

        $onlinedata['useragent'] = $db->escape_string($this->useragent);

        $onlinedata['location1'] = intval($speciallocs['1']);

        $onlinedata['location2'] = intval($speciallocs['2']);

        $onlinedata['nopermission'] = 0;

        $db->replace_query("sessions", $onlinedata, "sid", false);

        $this->sid = $onlinedata['sid'];

        $this->uid = $onlinedata['uid'];

    }



    /**

     * Find out the special locations.

     *

     * @return array Special locations array.

     */

    function get_special_locations()

    {

        global $mybb;

        $array = array('1' => '', '2' => '');

        if(preg_match("#forumdisplay.php#", $_SERVER['PHP_SELF']) && intval($mybb->input['fid']) > 0)

        {

            $array[1] = intval($mybb->input['fid']);

            $array[2] = '';

        }

        elseif(preg_match("#showthread.php#", $_SERVER['PHP_SELF']) && intval($mybb->input['tid']) > 0)

        {

            global $db;

            $array[2] = intval($mybb->input['tid']);

            $thread = get_thread(intval($array[2]));

            $array[1] = $thread['fid'];

        }

        return $array;

    }

}

?>