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File:C4/Input.pm
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1package C4::Input; #assumes C4/Input
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4# Copyright 2000-2002 Katipo Communications
5#
6# This file is part of Koha.
7#
8# Koha is free software; you can redistribute it and/or modify it under the
9# terms of the GNU General Public License as published by the Free Software
10# Foundation; either version 2 of the License, or (at your option) any later
11# version.
12#
13# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
14# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
15# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License along
18# with Koha; if not, write to the Free Software Foundation, Inc.,
19# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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use strict;
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use warnings;
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24require Exporter;
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use C4::Context;
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use CGI;
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use vars qw($VERSION @ISA @EXPORT);
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30# set the version for version checking
31$VERSION = 0.01;
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=head1 NAME

C4::Input - Miscellaneous sanity checks

=head1 SYNOPSIS

  use C4::Input;

=head1 DESCRIPTION

This module provides functions to see whether a given library card
number or ISBN is valid.

=head1 FUNCTIONS

=over 2

=cut
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52@ISA = qw(Exporter);
53@EXPORT = qw(
54        &checkdigit
55        &buildCGIsort
56);
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=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.

=cut
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68#'
69sub checkdigit ($;$) {
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        my ($infl, $nounique) = @_;
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        $infl = uc $infl;
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74        # Check to make sure the cardnumber is unique
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76        #FIXME: We should make the error for a nonunique cardnumber
77        #different from the one where the checkdigit on the number is
78        #not correct
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        unless ( $nounique )
81        {
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                my $query=qq{SELECT * FROM borrowers WHERE cardnumber=?};
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                my $sth=C4::Context->prepare($query);
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                $sth->execute($infl);
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                my %results = $sth->fetchrow_hashref();
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                if ( $sth->rows != 0 )
87                {
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                        return 0;
89                }
90        }
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        if (C4::Context->preference("checkdigit") eq "none") {
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                return 1;
93        }
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        my @weightings = (8,4,6,3,5,2,1);
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        my $sum;
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        foreach my $i (1..7) {
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                my $temp1 = $weightings[$i-1];
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                my $temp2 = substr($infl,$i,1);
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                $sum += $temp1 * $temp2;
101        }
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        my $rem = ($sum%11);
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        if ($rem == 10) {
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                $rem = "X";
105        }
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        if ($rem eq substr($infl,8,1)) {
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                return 1;
108        }
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        return 0;
110} # sub checkdigit
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=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

=cut
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121sub buildCGIsort {
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        my ($name,$input_name,$data) = @_;
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        my $dbh=C4::Context->dbh;
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        my $query=qq{SELECT * FROM authorised_values WHERE category=? order by lib};
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        my $sth=$dbh->prepare($query);
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        $sth->execute($name);
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        my $CGISort;
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        if ($sth->rows>0){
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                my @values;
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                my %labels;
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132                for (my $i =0;$i<$sth->rows;$i++){
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                        my $results = $sth->fetchrow_hashref;
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                        push @values, $results->{authorised_value};
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                        $labels{$results->{authorised_value}}=$results->{lib};
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                }
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                $CGISort= CGI::scrolling_list(
138                                        -name => $input_name,
139                                        -id => $input_name,
140                                        -values => \@values,
141                                        -labels => \%labels,
142                                        -default=> $data,
143                                        -size => 1,
144                                        -multiple => 0);
145        }
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        $sth->finish;
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        return $CGISort;
148}
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END { } # module clean-up code here (global destructor)
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