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<?php
// +-----------------------------------------------------------------------+
// | PhpWebGallery - a PHP based picture gallery |
// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |
// | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |
// +-----------------------------------------------------------------------+
// | branch : BSF (Best So Far)
// | file : $RCSfile$
// | last update : $Date$
// | last modifier : $Author$
// | revision : $Revision$
// +-----------------------------------------------------------------------+
// | 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 |
// | |
// | 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 more details. |
// | |
// | You should have received a copy of the GNU General Public License |
// | along with this program; if not, write to the Free Software |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA. |
// +-----------------------------------------------------------------------+
// get_group_restrictions returns an array containing all unaccessible
// category ids.
function get_group_restrictions( $group_id )
{
// 1. retrieving ids of private categories
$query = 'SELECT id FROM '.CATEGORIES_TABLE;
$query.= " WHERE status = 'private'";
$query.= ';';
$result = pwg_query( $query );
$privates = array();
while ( $row = mysql_fetch_array( $result ) )
{
array_push( $privates, $row['id'] );
}
// 2. retrieving all authorized categories for the group
$authorized = array();
$query = 'SELECT cat_id FROM '.GROUP_ACCESS_TABLE;
$query.= ' WHERE group_id = '.$group_id;
$query.= ';';
$result = pwg_query( $query );
while ( $row = mysql_fetch_array( $result ) )
{
array_push( $authorized, $row['cat_id'] );
}
$forbidden = array();
foreach ( $privates as $private ) {
if ( !in_array( $private, $authorized ) )
{
array_push( $forbidden, $private );
}
}
return $forbidden;
}
// get_all_group_restrictions returns an array with ALL unaccessible
// category ids, including sub-categories
function get_all_group_restrictions( $group_id )
{
$restricted_cats = get_group_restrictions( $group_id );
foreach ( $restricted_cats as $restricted_cat ) {
$sub_restricted_cats = get_subcats_id( $restricted_cat );
foreach ( $sub_restricted_cats as $sub_restricted_cat ) {
array_push( $restricted_cats, $sub_restricted_cat );
}
}
return $restricted_cats;
}
// The function is_group_allowed returns :
// - 0 : if the category is allowed with this $restrictions array
// - 1 : if this category is not allowed
// - 2 : if an uppercat category is not allowed
function is_group_allowed( $category_id, $restrictions )
{
$lowest_category_id = $category_id;
$is_root = false;
while ( !$is_root and !in_array( $category_id, $restrictions ) )
{
$query = 'SELECT id_uppercat FROM '.CATEGORIES_TABLE;
$query.= ' WHERE id = '.$category_id;
$query.= ';';
$row = mysql_fetch_array( pwg_query( $query ) );
if ( !isset( $row['id_uppercat'] ) ) $row['id_uppercat'] = '';
if ( $row['id_uppercat'] == '' ) $is_root = true;
$category_id = $row['id_uppercat'];
}
if ( in_array( $lowest_category_id, $restrictions ) )
{
return 1;
}
if ( in_array( $category_id, $restrictions ) )
{
return 2;
}
// this group is allowed to go in this category
return 0;
}
?>
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