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piwigo/admin/include/functions.php
z0rglub 673228fbe8 If there is no date given in the form, function check_date_format doesn't 
send a warning


git-svn-id: http://piwigo.org/svn/trunk@196 68402e56-0260-453c-a942-63ccdbb3a9ee
2003-10-11 14:17:07 +00:00

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PHP
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<?php
/***************************************************************************
* functions.php *
* ------------------- *
* application : PhpWebGallery 1.3 <http://phpwebgallery.net> *
* author : Pierrick LE GALL <pierrick@z0rglub.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; *
* *
***************************************************************************/
$tab_ext_create_TN = array ( 'jpg', 'png', 'JPG', 'PNG' );
// is_image returns true if the given $filename (including the path) is a
// picture according to its format and its extension.
// As GD library can only generate pictures from jpeg and png files, if you
// ask if the filename is an image for thumbnail creation (second parameter
// set to true), the only authorized formats are jpeg and png.
function is_image( $filename, $create_thumbnail = false )
{
global $conf, $tab_ext_create_TN;
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 ), $conf['picture_ext'] )
and ( $size[2] == 1 or $size[2] == 2 or $size[2] == 3 ) )
{
return true;
}
}
else
{
if ( in_array( get_extension( $filename ), $tab_ext_create_TN )
and ( $size[2] == 2 or $size[2] == 3 ) )
{
return true;
}
}
}
return false;
}
function TN_exists( $dir, $file )
{
global $conf;
$filename = get_filename_wo_extension( $file );
foreach ( $conf['picture_ext'] as $ext ) {
$test = $dir.'/thumbnail/'.$conf['prefix_thumbnail'].$filename.'.'.$ext;
if ( is_file ( $test ) )
{
return $ext;
}
}
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 )
{
// destruction of the categories of the site
$query = 'SELECT id';
$query.= ' FROM '.PREFIX_TABLE.'categories';
$query.= ' WHERE site_id = '.$id;
$query.= ';';
$result = mysql_query( $query );
while ( $row = mysql_fetch_array( $result ) )
{
delete_category( $row['id'] );
}
// destruction of the site
$query = 'DELETE FROM '.PREFIX_TABLE.'sites';
$query.= ' WHERE id = '.$id;
$query.= ';';
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 links between images and this category
// - all the restrictions linked to the category
// The function works recursively.
function delete_category( $id )
{
// destruction of all the related images
$query = 'SELECT id';
$query.= ' FROM '.PREFIX_TABLE.'images';
$query.= ' WHERE storage_category_id = '.$id;
$query.= ';';
$result = mysql_query( $query );
while ( $row = mysql_fetch_array( $result ) )
{
delete_image( $row['id'] );
}
// destruction of the links between images and this category
$query = 'DELETE FROM '.PREFIX_TABLE.'image_category';
$query.= ' WHERE category_id = '.$id;
$query.= ';';
mysql_query( $query );
// destruction of the access linked to the category
$query = 'DELETE FROM '.PREFIX_TABLE.'user_access';
$query.= ' WHERE cat_id = '.$id;
$query.= ';';
mysql_query( $query );
$query = 'DELETE FROM '.PREFIX_TABLE.'group_access';
$query.= ' WHERE cat_id = '.$id;
$query.= ';';
mysql_query( $query );
// destruction of the sub-categories
$query = 'SELECT id';
$query.= ' FROM '.PREFIX_TABLE.'categories';
$query.= ' WHERE id_uppercat = '.$id;
$query.= ';';
$result = mysql_query( $query );
while( $row = mysql_fetch_array( $result ) )
{
delete_category( $row['id'] );
}
// destruction of the category
$query = 'DELETE FROM '.PREFIX_TABLE.'categories';
$query.= ' WHERE id = '.$id;
$query.= ';';
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 links between categories and this image
// - all the favorites associated to the image
function delete_image( $id )
{
global $count_deleted;
// destruction of the comments on the image
$query = 'DELETE FROM '.PREFIX_TABLE.'comments';
$query.= ' WHERE image_id = '.$id;
$query.= ';';
mysql_query( $query );
// destruction of the links between images and this category
$query = 'DELETE FROM '.PREFIX_TABLE.'image_category';
$query.= ' WHERE image_id = '.$id;
$query.= ';';
mysql_query( $query );
// destruction of the favorites associated with the picture
$query = 'DELETE FROM '.PREFIX_TABLE.'favorites';
$query.= ' WHERE image_id = '.$id;
$query.= ';';
mysql_query( $query );
// destruction of the image
$query = 'DELETE FROM '.PREFIX_TABLE.'images';
$query.= ' WHERE id = '.$id;
$query.= ';';
mysql_query( $query );
$count_deleted++;
}
// The delete_user function delete a user identified by the $user_id
// It also deletes :
// - all the access linked to this user
// - all the links to any group
// - all the favorites linked to this user
// - all sessions linked to this user
function delete_user( $user_id )
{
// destruction of the access linked to the user
$query = 'DELETE FROM '.PREFIX_TABLE.'user_access';
$query.= ' WHERE user_id = '.$user_id;
$query.= ';';
mysql_query( $query );
// destruction of the group links for this user
$query = 'DELETE FROM '.PREFIX_TABLE.'user_group';
$query.= ' WHERE user_id = '.$user_id;
$query.= ';';
mysql_query( $query );
// destruction of the favorites associated with the user
$query = 'DELETE FROM '.PREFIX_TABLE.'favorites';
$query.= ' WHERE user_id = '.$user_id;
$query.= ';';
mysql_query( $query );
// destruction of the sessions linked with the user
$query = 'DELETE FROM '.PREFIX_TABLE.'sessions';
$query.= ' WHERE user_id = '.$user_id;
$query.= ';';
mysql_query( $query );
// destruction of the user
$query = 'DELETE FROM '.PREFIX_TABLE.'users';
$query.= ' WHERE id = '.$user_id;
$query.= ';';
mysql_query( $query );
}
// delete_group deletes a group identified by its $group_id.
// It also deletes :
// - all the access linked to this group
// - all the links between this group and any user
function delete_group( $group_id )
{
// destruction of the access linked to the group
$query = 'DELETE FROM '.PREFIX_TABLE.'group_access';
$query.= ' WHERE group_id = '.$group_id;
$query.= ';';
mysql_query( $query );
// destruction of the group links for this group
$query = 'DELETE FROM '.PREFIX_TABLE.'user_group';
$query.= ' WHERE group_id = '.$group_id;
$query.= ';';
mysql_query( $query );
// destruction of the group
$query = 'DELETE FROM '.PREFIX_TABLE.'groups';
$query.= ' WHERE id = '.$group_id;
$query.= ';';
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 )
{
$query = 'SELECT status';
$query.= ' FROM '.PREFIX_TABLE.'users';
$query.= ' WHERE id = '.$user_id;
$query.= ';';
$row = mysql_fetch_array( mysql_query( $query ) );
$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';
$query.= ' FROM '.PREFIX_TABLE.'favorites';
$query.= ' WHERE user_id = '.$user_id;
$query.= ';';
$result = mysql_query ( $query );
while ( $row = mysql_fetch_array( $result ) )
{
// for each picture, we have to check all the categories it belongs
// to. Indeed if a picture belongs to category_1 and category_2 and that
// category_2 is not restricted to the user, he can have the picture as
// favorite.
$query = 'SELECT DISTINCT(category_id) as category_id';
$query.= ' FROM '.PREFIX_TABLE.'image_category';
$query.= ' WHERE image_id = '.$row['image_id'];
$query.= ';';
$picture_result = mysql_query( $query );
$picture_cat = array();
while ( $picture_row = mysql_fetch_array( $picture_result ) )
{
array_push( $picture_cat, $picture_row['category_id'] );
}
if ( count( array_diff( $picture_cat, $restricted_cat ) ) == 0 )
{
$query = 'DELETE FROM '.PREFIX_TABLE.'favorites';
$query.= ' WHERE image_id = '.$row['image_id'];
$query.= ' AND user_id = '.$user_id;
$query.= ';';
mysql_query( $query );
}
}
}
// update_category updates calculated informations about a category :
// date_last and nb_images. It also verifies that the representative picture
// is really linked to the category.
function update_category( $id = 'all' )
{
if ( $id == 'all' )
{
$query = 'SELECT id';
$query.= ' FROM '.PREFIX_TABLE.'categories';
$query.= ';';
$result = mysql_query( $query );
while ( $row = mysql_fetch_array( $result ) )
{
// recursive call
update_category( $row['id'] );
}
}
else if ( is_numeric( $id ) )
{
// updating the number of pictures
$query = 'SELECT COUNT(*) as nb_images';
$query.= ' FROM '.PREFIX_TABLE.'image_category';
$query.= ' WHERE category_id = '.$id;
$query.= ';';
$row = mysql_fetch_array( mysql_query( $query ) );
$query = 'UPDATE '.PREFIX_TABLE.'categories';
$query.= ' SET nb_images = '.$row['nb_images'];
$query.= ' WHERE id = '.$id;
$query.= ';';
mysql_query( $query );
// updating the date_last
$query = 'SELECT date_available';
$query.= ' FROM '.PREFIX_TABLE.'images';
$query.= ' LEFT JOIN '.PREFIX_TABLE.'image_category ON id = image_id';
$query.= ' WHERE category_id = '.$id;
$query.= ' ORDER BY date_available DESC';
$query.= ' LIMIT 0,1';
$query.= ';';
$row = mysql_fetch_array( mysql_query( $query ) );
$query = 'UPDATE '.PREFIX_TABLE.'categories';
$query.= " SET date_last = '".$row['date_available']."'";
$query.= ' WHERE id = '.$id;
$query.= ';';
mysql_query( $query );
// updating the representative_picture_id : if the representative
// picture of the category is not any more linked to the category, we
// have to set representative_picture_id to NULL
$query = 'SELECT representative_picture_id';
$query.= ' FROM '.PREFIX_TABLE.'categories';
$query.= ' WHERE id = '.$id;
$row = mysql_fetch_array( mysql_query( $query ) );
// if the category has no representative picture (ie
// representative_picture_id == NULL) we don't update anything
if ( $row['representative_picture_id'] != '' )
{
$query = 'SELECT image_id';
$query.= ' FROM '.PREFIX_TABLE.'image_category';
$query.= ' WHERE category_id = '.$id;
$query.= ' AND image_id = '.$row['representative_picture_id'];
$query.= ';';
$result = mysql_query( $query );
if ( mysql_num_rows( $result ) == 0 )
{
$query = 'UPDATE '.PREFIX_TABLE.'categories';
$query.= ' SET representative_picture_id = NULL';
$query.= ' WHERE id = '.$id;
$query.= ';';
mysql_query( $query );
}
}
}
}
function check_date_format( $date )
{
// date arrives at this format : DD/MM/YYYY
list($day,$month,$year) = explode( '/', $date );
return @checkdate( $month, $day, $year );
}
function date_convert( $date )
{
// date arrives at this format : DD/MM/YYYY
// It must be transformed in YYYY-MM-DD
list($day,$month,$year) = explode( '/', $date );
return $year.'-'.$month.'-'.$day;
}
function date_convert_back( $date )
{
// date arrives at this format : YYYY-MM-DD
// It must be transformed in DD/MM/YYYY
if ( $date != '' )
{
list($year,$month,$day) = explode( '-', $date );
return $day.'/'.$month.'/'.$year;
}
else
{
return '';
}
}
// get_keywords returns an array with relevant keywords found in the string
// given in argument. Keywords must be separated by comma in this string.
// keywords must :
// - be longer or equal to 3 characters
// - not contain ', " or blank characters
// - unique in the string ("test,test" -> "test")
function get_keywords( $keywords_string )
{
$keywords = array();
$candidates = explode( ',', $keywords_string );
foreach ( $candidates as $candidate ) {
if ( strlen($candidate) >= 3 and !preg_match( '/(\'|"|\s)/', $candidate ) )
array_push( $keywords, $candidate );
}
return array_unique( $keywords );
}
function display_categories( $categories, $indent,
$selected = -1, $forbidden = -1 )
{
global $vtp,$sub;
foreach ( $categories as $category ) {
if ( $category['id'] != $forbidden )
{
$vtp->addSession( $sub, 'associate_cat' );
$vtp->setVar( $sub, 'associate_cat.value', $category['id'] );
$content = $indent.'- '.$category['name'];
$vtp->setVar( $sub, 'associate_cat.content', $content );
if ( $category['id'] == $selected )
$vtp->setVar( $sub, 'associate_cat.selected', ' selected="selected"' );
$vtp->closeSession( $sub, 'associate_cat' );
display_categories( $category['subcats'], $indent.str_repeat('&nbsp;',3),
$selected, $forbidden );
}
}
}
?>
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