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<?php
/***************************************************************************
* auth.php
* -------------------
* begin : Saturday, Feb 13, 2001
* copyright : (C) 2001 The phpBB Group
* email : support@phpbb.com
*
* $Id$
*
*
***************************************************************************/
/***************************************************************************
*
* 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.
*
*
***************************************************************************/
/* Notes:
* auth() returns:
* TRUE if the user authorized
* FALSE if the user is not
*/
function auth($type, $forum_id, $userdata, $f_access = -1)
{
global $db;
switch($type)
{
case VIEW:
$a_sql = "auth_view";
break;
case READ:
$a_sql = "auth_read";
break;
case POST:
$a_sql = "auth_post";
break;
case REPLY:
$a_sql = "auth_reply";
break;
case EDIT:
$a_sql = "auth_edit";
break;
case DELETE:
$a_sql = "auth_delete";
break;
case VOTECREATE:
$a_sql = "auth_votecreate";
break;
case VOTE:
$a_sql = "auth_vote";
break;
default:
break;
}
//
// If f_access has been passed, or auth
// is needed to return an array of forums
// then we need to pull the auth information
// on the given forum (or all forums)
//
if($f_access == -1 || $forum_id == LIST_ALL)
{
$forum_match_sql = ($forum_id != LIST_ALL) ? "WHERE forum_id = $forum_id" : "";
$sql = "SELECT $a_sql AS forum_auth
FROM ".AUTH_FORUMS_TABLE."
$forum_match_sql";
$af_result = $db->sql_query($sql);
if($forum_id != LIST_ALL)
{
$f_access = $db->sql_fetchfield("forum_auth", -1, $af_result);
}
else
{
$f_access_rows = $db->sql_fetchrowset($af_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 then
// they're good to go, if not then they
// are denied access
//
if(!$userdata['session_logged_in'])
{
if($forum_id != LIST_ALL)
{
$auth_user = ($f_access == ALL) ? true : false;
}
else
{
$auth_user_list = array();
for($i = 0; $i < count($auth_forum_rows); $i++)
{
$auth_user_list[] = ($f_access_rows['0']['forum_auth'] == ALL) ? true : false;
}
}
}
else
{
//
// If the user is logged on and the forum
// type is either ALL or REG then the user
// has access
//
if($f_access == ALL || $f_access == REG)
{
$auth_user = true;
}
else
{
//
// 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)
//
$forum_match_sql = ($forum_id != LIST_ALL) ? "AND ( aa.forum_id = $forum_id OR aa.forum_id = " . ALL . ")" : "";
$sql = "SELECT aa.$a_sql AS user_auth, aa.auth_mod, aa.auth_admin, g.single_user
FROM ".AUTH_ACCESS_TABLE." aa, " . USER_GROUP_TABLE. " ug, " . GROUPS_TABLE. " g
WHERE ug.user_id = ".$userdata['user_id']. "
AND g.group_id = ug.group_id
AND aa.group_id = ug.group_id
$forum_match_sql";
$au_result = $db->sql_query($sql);
if(!$db->sql_numrows($au_result))
{
//
// No entry was found for this user
// thus they don't have access,
// You are the Weakest Link, Goodbye!
//
$auth_user = false;
}
else
{
$u_access = $db->sql_fetchrowset($au_result);
}
$single_user = false;
//
// Now we compare the users access level
// against the forums We assume here that
// a moderator and admin automatically have
// access to an ACL forum, similarly we assume
// admins meet an auth requirement of MOD
//
// The access level assigned to a single user
// automatically takes precedence over any
// levels granted by that user being a member
// of a multi-user usergroup, eg. a user
// who is banned from a forum won't gain
// access to it even if they belong to a group
// which has access (and vice versa). This
// check is done via the single_user check
//
switch($f_access)
{
case ACL:
for($i = 0; $i < count($u_access); $i++)
{
if(!$single_user)
{
$auth_user = $auth_user || $u_access[$i]['user_auth'] || $u_access[$i]['auth_mod'] || $u_access[$i]['auth_admin'];
$single_user = $u_access[$i]['single_user'];
}
}
break;
case MOD:
for($i = 0; $i < count($u_access); $i++)
{
if(!$single_user)
{
$auth_user = $auth_user || $u_access[$i]['auth_mod'] || $u_access[$i]['auth_admin'];
$single_user = $u_access[$i]['single_user'];
}
}
break;
case ADMIN:
for($i = 0; $i < count($u_access); $i++)
{
if(!$single_user)
{
$auth_user = $auth_user || $u_access[$i]['auth_admin'];
$single_user = $u_access[$i]['single_user'];
}
}
break;
default:
$auth_user = false;
break;
}
}
}
//
// This currently only returns true or false
// however it will also return an array if a listing
// of all forums to which a user has access was requested.
//
return ( ($forum_id != LIST_ALL) ? $auth_user : $auth_user_list );
}
?>
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