<?php

/*

Plugin Name: Who's Online

Plugin URI: javascript: // No URL yet, stay tuned!

Description: This plugin tracks who is currently online. 3 queries per page request. This plugin works ONLY with MySQL and will likely be difficult to port because it uses unique indices and the REPLACE command.

Author: Dan Fuhry

Version: 0.1

Author URI: http://www.enanocms.org/

*/

/*

 * Who's Online plugin for Enano

 * Version 0.1

 * Copyright (C) 2007 Dan Fuhry

 *

 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied

 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.

 */

global $whos_online;

$whos_online = Array('not_yet_initialized');

// First things first - create the table if needed

$ver = getConfig('whos_online_version');

if($ver != '0.1')

{

  if(!

    $db->sql_query('DROP TABLE IF EXISTS '.table_prefix.'online;')

    ) $db->_die('Could not clean out old who\'s-online table');

  // The key on username allows the REPLACE command later, to save queries

  if(!$db->sql_query('CREATE TABLE '.table_prefix.'online(

        entry_id int(12) UNSIGNED NOT NULL auto_increment,

        user_id int(12) NOT NULL,

        username varchar(63) NOT NULL,

        last_load int(12) NOT NULL,

        PRIMARY KEY ( entry_id ),

        KEY ( username )

      );')

    ) $db->_die('Could not create new who\'s-online table');

  if(!$db->sql_query('CREATE UNIQUE INDEX '.table_prefix.'onluser ON '.table_prefix.'online(username);'))

    $db->_die('Could not create index on username column.');

  setConfig('whos_online_version', '0.1');

}

$plugins->attachHook('session_started', '__WhosOnline_UserCount();');

$plugins->attachHook('login_success', '__WhosOnline_logonhandler();');

$plugins->attachHook('logout_success', '__WhosOnline_logoffhandler($ou, $oid, $level);');

function __WhosOnline_UserCount()

{

  global $db, $session, $paths, $template, $plugins; // Common objects

  global $whos_online;

  $whos_online = Array();

  $whos_online['users'] = Array();

  $whos_online['guests'] = Array();

  $q = $db->sql_query('REPLACE INTO '.table_prefix.'online SET user_id='.$session->user_id.',username=\''.$db->escape($session->username).'\',last_load='.time().';'); if(!$q) $db->_die('');

  $q = $db->sql_query('DELETE FROM '.table_prefix.'online WHERE last_load<'.( time() - 60*60*24 ).';'); if(!$q) $db->_die('');

  $q = $db->sql_query('SELECT o.username,o.user_id,u.user_level FROM '.table_prefix.'online AS o

    LEFT JOIN '.table_prefix.'users AS u

      ON u.user_id=o.user_id

    WHERE last_load>'.( time() - 60*5 - 1 ).' ORDER BY username ASC'); if(!$q) $db->_die('');

  $num_guests = 0;

  $num_users = 0;

  $users = Array();

  {

    ( $row['user_id'] == 1 ) ? $num_guests++ : $num_users++;

    if($row['user_id'] > 1)

    {

      $whos_online['users'][] = $row['username'];

    }

    else

    {

      $whos_online['guests'][] = $row['username'];

    }

  }

  $total = $num_guests + $num_users;

  $ms = ( $num_users == 1 ) ? '' : 's';

  $gs = ( $num_guests == 1 ) ? '' : 's';

  $ts = ( $total == 1 ) ? '' : 's';

  $is_are = ( $total == 1 ) ? 'is' : 'are';

  $users = implode(', ', $users);

  $online_main = ( $num_users > 0 ) ? "<br />

               Users online right now:

               <div style='max-height: 100px; clip: rect(0px,auto,auto,0px); overflow: auto;'>

               $users

               </div>

               Legend:<br /><span style='color: #00AA00; font-weight: bold;'>Moderators</span> :: <span style='color: #AA0000; font-weight: bold;'>Administrators</span>"

               : '';

  $html = "<div style='padding: 5px;'>

             <small>

               There $is_are <b>$total</b> user$ts online :: <b>$num_guests</b> guest$gs and <b>$num_users</b> member$ms

               $online_main

             </small>

           </div>";

  $template->sidebar_widget('Who\'s Online', $html);

}

function __WhosOnline_logonhandler()

{

  global $db, $session, $paths, $template, $plugins; // Common objects

  $q = $db->sql_query('DELETE FROM '.table_prefix.'online WHERE user_id=1 AND username=\''.$db->escape($_SERVER['REMOTE_ADDR']).'\';');

  if(!$q)

    echo $db->get_error();

  if(!$session->theme)

    $session->register_guest_session();

  $template->load_theme($session->theme, $session->style);

  __WhosOnline_UserCount();

}

function __WhosOnline_logoffhandler($username, $user_id, $level)

{

  if($level <= USER_LEVEL_MEMBER)

  {

    global $db, $session, $paths, $template, $plugins; // Common objects

    $q = $db->sql_query('DELETE FROM '.table_prefix.'online WHERE user_id=\''.intval($user_id).'\' AND username=\''.$db->escape($username).'\';');

    if(!$q)

      echo $db->get_error();

    $q = $db->sql_query('REPLACE INTO '.table_prefix.'online SET user_id=1,username=\''.$db->escape($_SERVER['REMOTE_ADDR']).'\',last_load='.time().';'); if(!$q) $db->_die('');

    if(!$q)

      echo $db->get_error();

  }

}

?>