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package C4::Input; #assumes C4/Input
# Copyright 2000-2002 Katipo Communications
# This file is part of Koha.
# Koha 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.
# Koha 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
# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA 02111-1307 USA
use strict;
use warnings;
require Exporter;
use Koha;
use C4::Context;
use CGI;
use vars qw($VERSION @ISA @EXPORT);
# set the version for version checking
$VERSION = 0.01;
=head1 NAME
C4::Input - Miscellaneous sanity checks
use C4::Input;
This module provides functions to see whether a given library card
number or ISBN is valid.
=over 2
@ISA = qw(Exporter);
@EXPORT = qw(
=item checkdigit
$valid = &checkdigit($cardnumber $nounique);
Takes a card number, computes its check digit, and compares it to the
checkdigit at the end of C<$cardnumber>. Returns a true value iff
C<$cardnumber> has a valid check digit.
sub checkdigit ($;$) {
my ($infl, $nounique) = @_;
$infl = uc $infl;
# Check to make sure the cardnumber is unique
#FIXME: We should make the error for a nonunique cardnumber
#different from the one where the checkdigit on the number is
#not correct
unless ( $nounique )
my $query=qq{SELECT * FROM borrowers WHERE cardnumber=?};
my $sth=C4::Context->prepare($query);
my %results = $sth->fetchrow_hashref();
if ( $sth->rows != 0 )
return 0;
if (C4::Context->preference("checkdigit") eq "none") {
return 1;
my @weightings = (8,4,6,3,5,2,1);
my $sum;
foreach my $i (1..7) {
my $temp1 = $weightings[$i-1];
my $temp2 = substr($infl,$i,1);
$sum += $temp1 * $temp2;
my $rem = ($sum%11);
if ($rem == 10) {
$rem = "X";
if ($rem eq substr($infl,8,1)) {
return 1;
return 0;
} # sub checkdigit
=item buildCGISort
$CGIScrollingList = &buildCGISort($name string, $input_name string);
Returns the scrolling list with name $input_name, built on authorised Values named $name.
Returns NULL if no authorised values found
sub buildCGIsort {
my ($name,$input_name,$data) = @_;
my $dbh=C4::Context->dbh;
my $query=qq{SELECT * FROM authorised_values WHERE category=? order by lib};
my $sth=$dbh->prepare($query);
my $CGISort;
if ($sth->rows>0){
my @values;
my %labels;
for (my $i =0;$i<$sth->rows;$i++){
my $results = $sth->fetchrow_hashref;
push @values, $results->{authorised_value};
$CGISort= CGI::scrolling_list(
-name => $input_name,
-values => \@values,
-labels => \%labels,
-default=> $data,
-size => 1,
-multiple => 0);
return $CGISort;
END { } # module clean-up code here (global destructor)
=head1 AUTHOR
Koha Developement team <>
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