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<?php
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// +-----------------------------------------------------------------------+
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// | PhpWebGallery - a PHP based picture gallery |
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// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |
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// | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |
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// +-----------------------------------------------------------------------+
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// | branch : BSF (Best So Far)
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// | file : $RCSfile: functions_group.inc.php,v $
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// | last update : $Date: 2005/01/07 23:10:51 $
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// | last modifier : $Author: plg $
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// | revision : $Revision: 1.8 $
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// +-----------------------------------------------------------------------+
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// | This program is free software; you can redistribute it and/or modify |
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// | it under the terms of the GNU General Public License as published by |
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// | the Free Software Foundation |
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// | |
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// | This program is distributed in the hope that it will be useful, but |
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// | WITHOUT ANY WARRANTY; without even the implied warranty of |
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// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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// | General Public License for more details. |
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// | |
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// | You should have received a copy of the GNU General Public License |
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// | along with this program; if not, write to the Free Software |
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// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
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// | USA. |
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// +-----------------------------------------------------------------------+
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// get_group_restrictions returns an array containing all unaccessible
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// category ids.
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function get_group_restrictions( $group_id )
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{
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// 1. retrieving ids of private categories
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$query = 'SELECT id FROM '.CATEGORIES_TABLE;
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$query.= " WHERE status = 'private'";
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$query.= ';';
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$result = pwg_query( $query );
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$privates = array();
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while ( $row = mysql_fetch_array( $result ) )
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{
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array_push( $privates, $row['id'] );
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}
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// 2. retrieving all authorized categories for the group
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$authorized = array();
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$query = 'SELECT cat_id FROM '.GROUP_ACCESS_TABLE;
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$query.= ' WHERE group_id = '.$group_id;
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$query.= ';';
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$result = pwg_query( $query );
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while ( $row = mysql_fetch_array( $result ) )
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{
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array_push( $authorized, $row['cat_id'] );
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}
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$forbidden = array();
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foreach ( $privates as $private ) {
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if ( !in_array( $private, $authorized ) )
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{
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array_push( $forbidden, $private );
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}
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}
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return $forbidden;
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}
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// get_all_group_restrictions returns an array with ALL unaccessible
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// category ids, including sub-categories
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function get_all_group_restrictions( $group_id )
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{
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$restricted_cats = get_group_restrictions( $group_id );
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foreach ( $restricted_cats as $restricted_cat ) {
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$sub_restricted_cats = get_subcats_id( $restricted_cat );
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foreach ( $sub_restricted_cats as $sub_restricted_cat ) {
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array_push( $restricted_cats, $sub_restricted_cat );
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}
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}
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return $restricted_cats;
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}
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// The function is_group_allowed returns :
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// - 0 : if the category is allowed with this $restrictions array
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// - 1 : if this category is not allowed
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// - 2 : if an uppercat category is not allowed
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function is_group_allowed( $category_id, $restrictions )
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{
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$lowest_category_id = $category_id;
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$is_root = false;
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while ( !$is_root and !in_array( $category_id, $restrictions ) )
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{
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$query = 'SELECT id_uppercat FROM '.CATEGORIES_TABLE;
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$query.= ' WHERE id = '.$category_id;
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$query.= ';';
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$row = mysql_fetch_array( pwg_query( $query ) );
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if ( !isset( $row['id_uppercat'] ) ) $row['id_uppercat'] = '';
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if ( $row['id_uppercat'] == '' ) $is_root = true;
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$category_id = $row['id_uppercat'];
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}
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if ( in_array( $lowest_category_id, $restrictions ) )
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{
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return 1;
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}
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if ( in_array( $category_id, $restrictions ) )
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{
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return 2;
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}
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// this group is allowed to go in this category
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return 0;
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}
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?>
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