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<?php
/***************************************************************************
* functions.php is a part of PhpWebGallery *
* ------------------- *
* last update : Tuesday, September 26, 2002 *
* email : pierrick@z0rglub.com *
* *
***************************************************************************
***************************************************************************
* *
* 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; *
* *
***************************************************************************/
$tab_ext = array ( 'jpg', 'gif', 'JPG','GIF','png','PNG' );
$tab_ext_create_TN = array ( 'jpg', 'JPG','png','PNG' );
function get_extension( $filename )
{
return substr ( strrchr($filename,"."), 1, strlen ( $filename ) );
}
function is_image( $filename, $create_thumbnail = false )
{
global $tab_ext, $tab_ext_create_TN;
$is_image = false;
if ( is_file ( $filename ) )
{
$size = getimagesize( $filename );
// $size[2] == 1 means GIF
// $size[2] == 2 means JPG
// $size[2] == 3 means PNG
if ( !$create_thumbnail )
{
if ( in_array ( get_extension( $filename ), $tab_ext ) && ( $size[2] == 1 || $size[2] == 2 || $size[2] == 3 ) )
{
$is_image = true;
}
}
else
{
if ( in_array ( get_extension( $filename ), $tab_ext_create_TN ) && ( $size[2] == 2 || $size[2] == 3 ) )
{
$is_image = true;
}
}
}
return $is_image;
}
function TN_exist ( $dir, $file )
{
global $tab_ext, $conf;
$titre = substr ( $file, 0, strrpos ( $file, ".") );
for ( $i = 0; $i < sizeof ( $tab_ext ); $i++ )
{
$test = $dir."/thumbnail/".$conf['prefixe_thumbnail'].$titre.".".$tab_ext[$i];
if ( is_file ( $test ) )
{
return $tab_ext[$i];
}
}
return false;
}
// The function delete_site deletes a site
// and call the function delete_category for each primary category of the site
function delete_site( $id )
{
global $prefixeTable;
// destruction of the categories of the site
$query = "select id from $prefixeTable"."categories where site_id = $id;";
$result = mysql_query( $query );
while ( $row = mysql_fetch_array( $result ) )
{
delete_category( $row['id'] );
}
// destruction of the site
$query = "delete from $prefixeTable"."sites where id = $id;";
mysql_query( $query );
}
// The function delete_category deletes the category identified by the $id
// It also deletes (in the database) :
// - all the images of the images (thanks to delete_image, see further)
// - all the restrictions linked to the category
// The function works recursively.
function delete_category( $id )
{
global $prefixeTable;
// destruction of all the related images
$query = "select id from $prefixeTable"."images where cat_id = '".$id."';";
$result = mysql_query( $query );
while ( $row = mysql_fetch_array( $result ) )
{
delete_image( $row['id'] );
}
// destruction of the restrictions linked to the category
$query = "delete from $prefixeTable"."restrictions where cat_id = '".$id."';";
mysql_query( $query );
// destruction of the sub-categories
$query = "select id from $prefixeTable"."categories where id_uppercat = '$id';";
$result = mysql_query( $query );
while( $row = mysql_fetch_array( $result ) )
{
delete_category( $row['id'] );
}
// destruction of the category
$query = "delete from $prefixeTable"."categories where id = '$id';";
mysql_query( $query );
}
// The function delete_image deletes the image identified by the $id
// It also deletes (in the database) :
// - all the comments related to the image
// - all the favorites associated to the image
function delete_image( $id )
{
global $prefixeTable,$count_deleted;
// destruction of the comments on the image
$query = "delete from $prefixeTable"."comments where image_id = $id;";
mysql_query( $query );
// destruction of the favorites associated with the picture
$query = "delete from $prefixeTable"."favorites where image_id = $id;";
mysql_query( $query );
// destruction of the image
$query = "delete from $prefixeTable"."images where id = $id;";
mysql_query( $query );
$count_deleted++;
}
// The delete_user function delete a user identified by the $user_id
// It also deletes :
// - all the restrictions linked to this user
// - all the favorites linked to this user
function delete_user( $user_id )
{
global $prefixeTable;
// destruction of the restrictions linked to the user
$query = "delete from $prefixeTable"."restrictions where user_id = $user_id;";
mysql_query( $query );
// destruction of the favorites associated with the user
$query = "delete from $prefixeTable"."favorites where user_id = $user_id;";
mysql_query( $query );
// destruction of the user
$query = "delete from $prefixeTable"."users where id = $user_id;";
mysql_query( $query );
}
// The check_favorites function deletes all the favorites of a user if he is not allowed to see them
// (the category or an upper category is restricted or invisible)
function check_favorites( $user_id )
{
global $prefixeTable;
$row = mysql_fetch_array( mysql_query( "select status from $prefixeTable"."users where id = $user_id;" ) );
$status = $row['status'];
// retrieving all the restricted categories for this user
$restricted_cat = get_all_restrictions( $user_id, $status );
// retrieving all the favorites for this user and comparing their categories to the restricted categories
$query = "select image_id, cat_id";
$query.= " from $prefixeTable"."favorites, $prefixeTable"."images";
$query.= " where user_id = $user_id";
$query.= " and id = image_id";
$query.= ";";
$result = mysql_query ( $query );
while ( $row = mysql_fetch_array( $result ) )
{
if ( in_array( $row['cat_id'], $restricted_cat ) )
{
$query = "delete from $prefixeTable"."favorites";
$query.= " where image_id = ".$row['image_id'];
$query.= " and user_id = $user_id";
$query.= ";";
mysql_query( $query );
}
}
}
?>
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