<?php
/***************************************************************************
 *                                 auth.php
 *                            -------------------
 *   begin                : Saturday, Feb 13, 2001
 *   copyright            : (C) 2001 The phpBB Group
 *   email                : support@phpbb.com
 *
 *   Id: auth.php,v 1.37.2.5 2004/03/01 16:49:03 psotfx Exp
 *
 *
 ***************************************************************************/
/***************************************************************************
* phpbb2 forums port version 2.0.5 (c) 2003 - Nuke Cops (http://nukecops.com)
*
* Ported by Nuke Cops to phpbb2 standalone 2.0.5 Test
* and debugging completed by the Elite Nukers and site members.
*
* You run this package at your sole risk. Nuke Cops and affiliates cannot
* be held liable if anything goes wrong. You are advised to test this
* package on a development system. Backup everything before implementing
* in a production environment. If something goes wrong, you can always
* backout and restore your backups.
*
* Installing and running this also means you agree to the terms of the AUP
* found at Nuke Cops.
*
* This is version 2.0.5 of the phpbb2 forum port for PHP-Nuke. Work is based
* on Tom Nitzschner's forum port version 2.0.6. Tom's 2.0.6 port was based
* on the phpbb2 standalone version 2.0.3. Our version 2.0.5 from Nuke Cops is
* now reflecting phpbb2 standalone 2.0.5 that fixes some bugs and the
* invalid_session error message.
***************************************************************************/
/***************************************************************************
 *   This file is part of the phpBB2 port to Nuke 6.0 (c) copyright 2002
 *   by Tom Nitzschner (tom@toms-home.com)
 *   http://bbtonuke.sourceforge.net (or http://www.toms-home.com)
 *
 *   As always, make a backup before messing with anything. All code
 *   release by me is considered sample code only. It may be fully
 *   functual, but you use it at your own risk, if you break it,
 *   you get to fix it too. No waranty is given or implied.
 *
 *   Please post all questions/request about this port on http://bbtonuke.sourceforge.net first,
 *   then on my site. All original header code and copyright messages will be maintained
 *   to give credit where credit is due. If you modify this, the only requirement is
 *   that you also maintain all original copyright messages. All my work is released
 *   under the GNU GENERAL PUBLIC LICENSE. Please see the README for more information.
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   This program is free software; you can redistribute it 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.
 *
 ***************************************************************************/
if ( !defined('IN_PHPBB') )
{
        die("Hacking attempt");
        exit;
}

/*
        $type's accepted (pre-pend with AUTH_):
        VIEW, READ, POST, REPLY, EDIT, DELETE, STICKY, ANNOUNCE, VOTE, POLLCREATE

        Possible options ($type/forum_id combinations):

        * If you include a type and forum_id then a specific lookup will be done and
        the single result returned

        * If you set type to AUTH_ALL and specify a forum_id an array of all auth types
        will be returned

        * If you provide a forum_id a specific lookup on that forum will be done

        * If you set forum_id to AUTH_LIST_ALL and specify a type an array listing the
        results for all forums will be returned

        * If you set forum_id to AUTH_LIST_ALL and type to AUTH_ALL a multidimensional
        array containing the auth permissions for all types and all forums for that
        user is returned

        All results are returned as associative arrays, even when a single auth type is
        specified.

        If available you can send an array (either one or two dimensional) containing the
        forum auth levels, this will prevent the auth function having to do its own
        lookup
*/
function auth($type, $forum_id, $userdata, $f_access = '')
{
        global $db, $lang;

        switch( $type )
        {
                case AUTH_ALL:
                        $a_sql = 'a.auth_view, a.auth_read, a.auth_post, a.auth_reply, a.auth_edit, a.auth_delete, a.auth_sticky, a.auth_announce, a.auth_vote, a.auth_pollcreate';
                        $auth_fields = array('auth_view', 'auth_read', 'auth_post', 'auth_reply', 'auth_edit', 'auth_delete', 'auth_sticky', 'auth_announce', 'auth_vote', 'auth_pollcreate');
                        break;

                case AUTH_VIEW:
                        $a_sql = 'a.auth_view';
                        $auth_fields = array('auth_view');
                        break;

                case AUTH_READ:
                        $a_sql = 'a.auth_read';
                        $auth_fields = array('auth_read');
                        break;
                case AUTH_POST:
                        $a_sql = 'a.auth_post';
                        $auth_fields = array('auth_post');
                        break;
                case AUTH_REPLY:
                        $a_sql = 'a.auth_reply';
                        $auth_fields = array('auth_reply');
                        break;
                case AUTH_EDIT:
                        $a_sql = 'a.auth_edit';
                        $auth_fields = array('auth_edit');
                        break;
                case AUTH_DELETE:
                        $a_sql = 'a.auth_delete';
                        $auth_fields = array('auth_delete');
                        break;

                case AUTH_ANNOUNCE:
                        $a_sql = 'a.auth_announce';
                        $auth_fields = array('auth_announce');
                        break;
                case AUTH_STICKY:
                        $a_sql = 'a.auth_sticky';
                        $auth_fields = array('auth_sticky');
                        break;

                case AUTH_POLLCREATE:
                        $a_sql = 'a.auth_pollcreate';
                        $auth_fields = array('auth_pollcreate');
                        break;
                case AUTH_VOTE:
                        $a_sql = 'a.auth_vote';
                        $auth_fields = array('auth_vote');
                        break;
                case AUTH_ATTACH:
                        break;

                default:
                        break;
        }

        //
        // If f_access has been passed, or auth is needed to return an array of forums
        // then we need to pull the auth information on the given forum (or all forums)
        //
        if ( empty($f_access) )
        {
                $forum_match_sql = ( $forum_id != AUTH_LIST_ALL ) ? "WHERE a.forum_id = '$forum_id'" : '';

                $sql = "SELECT a.forum_id, $a_sql
                        FROM " . FORUMS_TABLE . " a
                        $forum_match_sql";
                if ( !($result = $db->sql_query($sql)) )
                {
                        message_die(GENERAL_ERROR, 'Failed obtaining forum access control lists', '', __LINE__, __FILE__, $sql);
                }

                $sql_fetchrow = ( $forum_id != AUTH_LIST_ALL ) ? 'sql_fetchrow' : 'sql_fetchrowset';

                if ( !($f_access = $db->$sql_fetchrow($result)) )
                {
                        $db->sql_freeresult($result);
                        return array();
                }

                $db->sql_freeresult($result);
        }

        //
        // If the user isn't logged on then all we need do is check if the forum
        // has the type set to ALL, if yes they are good to go, if not then they
        // are denied access
        //
        $u_access = array();
        if ( $userdata['session_logged_in'] )
        {
                $forum_match_sql = ( $forum_id != AUTH_LIST_ALL ) ? "AND a.forum_id = '$forum_id'" : '';

                $sql = "SELECT a.forum_id, $a_sql, a.auth_mod
                        FROM " . AUTH_ACCESS_TABLE . " a, " . USER_GROUP_TABLE . " ug
                        WHERE ug.user_id = ".$userdata['user_id']. "
                                AND ug.user_pending = '0'
                                AND a.group_id = ug.group_id
                                $forum_match_sql";
                if ( !($result = $db->sql_query($sql)) )
                {
                        message_die(GENERAL_ERROR, 'Failed obtaining forum access control lists', '', __LINE__, __FILE__, $sql);
                }

                if ( $row = $db->sql_fetchrow($result) )
                {
                        do
                        {
                                if ( $forum_id != AUTH_LIST_ALL)
                                {
                                        $u_access[] = $row;
                                }
                                else
                                {
                                        $u_access[$row['forum_id']][] = $row;
                                }
                        }
                        while( $row = $db->sql_fetchrow($result) );
                }
		$db->sql_freeresult($result);
        }

        $is_admin = ( $userdata['user_level'] == ADMIN && $userdata['session_logged_in'] ) ? TRUE : 0;

        $auth_user = array();
        for($i = 0; $i < count($auth_fields); $i++)
        {
                $key = $auth_fields[$i];

                //
                // If the user is logged on and the forum type is either ALL or REG then the user has access
                //
                // If the type if ACL, MOD or ADMIN then we need to see if the user has specific permissions
                // to do whatever it is they want to do ... to do this we pull relevant information for the
                // user (and any groups they belong to)
                //
                // Now we compare the users access level against the forums. We assume here that a moderator
                // and admin automatically have access to an ACL forum, similarly we assume admins meet an
                // auth requirement of MOD
                //
                if ( $forum_id != AUTH_LIST_ALL )
                {
                        $value = $f_access[$key];

                        switch( $value )
                        {
                                case AUTH_ALL:
                                        $auth_user[$key] = TRUE;
                                        $auth_user[$key . '_type'] = $lang['Auth_Anonymous_Users'];
                                        break;

                                case AUTH_REG:
                                        $auth_user[$key] = ( $userdata['session_logged_in'] ) ? TRUE : 0;
                                        $auth_user[$key . '_type'] = $lang['Auth_Registered_Users'];
                                        break;

                                case AUTH_ACL:
                                        $auth_user[$key] = ( $userdata['session_logged_in'] ) ? auth_check_user(AUTH_ACL, $key, $u_access, $is_admin) : 0;
                                        $auth_user[$key . '_type'] = $lang['Auth_Users_granted_access'];
                                        break;

                                case AUTH_MOD:
                                        $auth_user[$key] = ( $userdata['session_logged_in'] ) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access, $is_admin) : 0;
                                        $auth_user[$key . '_type'] = $lang['Auth_Moderators'];
                                        break;

                                case AUTH_ADMIN:
                                        $auth_user[$key] = $is_admin;
                                        $auth_user[$key . '_type'] = $lang['Auth_Administrators'];
                                        break;

                                default:
                                        $auth_user[$key] = 0;
                                        break;
                        }
                }
                else
                {
                        for($k = 0; $k < count($f_access); $k++)
                        {
                                $value = $f_access[$k][$key];
                                $f_forum_id = $f_access[$k]['forum_id'];

                                switch( $value )
                                {
                                        case AUTH_ALL:
                                                $auth_user[$f_forum_id][$key] = TRUE;
                                                $auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Anonymous_Users'];
                                                break;

                                        case AUTH_REG:
                                                $auth_user[$f_forum_id][$key] = ( $userdata['session_logged_in'] ) ? TRUE : 0;
                                                $auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Registered_Users'];
                                                break;

                                        case AUTH_ACL:
                                                $auth_user[$f_forum_id][$key] = ( $userdata['session_logged_in'] ) ? auth_check_user(AUTH_ACL, $key, $u_access[$f_forum_id], $is_admin) : 0;
                                                $auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Users_granted_access'];
                                                break;

                                        case AUTH_MOD:
                                                $auth_user[$f_forum_id][$key] = ( $userdata['session_logged_in'] ) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access[$f_forum_id], $is_admin) : 0;
                                                $auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Moderators'];
                                                break;

                                        case AUTH_ADMIN:
                                                $auth_user[$f_forum_id][$key] = $is_admin;
                                                $auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Administrators'];
                                                break;

                                        default:
                                                $auth_user[$f_forum_id][$key] = 0;
                                                break;
                                }
                        }
                }
        }

        //
        // Is user a moderator?
        //
        if ( $forum_id != AUTH_LIST_ALL )
        {
                $auth_user['auth_mod'] = ( $userdata['session_logged_in'] ) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access, $is_admin) : 0;
        }
        else
        {
                for($k = 0; $k < count($f_access); $k++)
                {
                        $f_forum_id = $f_access[$k]['forum_id'];

                        $auth_user[$f_forum_id]['auth_mod'] = ( $userdata['session_logged_in'] ) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access[$f_forum_id], $is_admin) : 0;
                }
        }

        return $auth_user;
}

function auth_check_user($type, $key, $u_access, $is_admin)
{
        $auth_user = 0;

        if ( count($u_access) )
        {
                for($j = 0; $j < count($u_access); $j++)
                {
                        $result = 0;
                        switch($type)
                        {
                                case AUTH_ACL:
                                        $result = $u_access[$j][$key];

                                case AUTH_MOD:
                                        $result = $result || $u_access[$j]['auth_mod'];

                                case AUTH_ADMIN:
                                        $result = $result || $is_admin;
                                        break;
                        }

                        $auth_user = $auth_user || $result;
                }
        }
        else
        {
                $auth_user = $is_admin;
        }

        return $auth_user;
}

?>