a6c9bd0eb5
Signed-off-by: Chris Nighswonger <cnighswonger@foundations.edu> Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com> Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de> http://bugs.koha-community.org/show_bug.cgi?id=9987 Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com> Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
122 lines
2.4 KiB
Perl
122 lines
2.4 KiB
Perl
package C4::Input; #assumes C4/Input
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# Copyright 2000-2002 Katipo Communications
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#
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# This file is part of Koha.
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#
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# Koha is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# Koha 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
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# GNU 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 Koha; if not, see <http://www.gnu.org/licenses>.
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use strict;
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use warnings;
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require Exporter;
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use C4::Context;
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use CGI qw ( -utf8 );
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use vars qw($VERSION @ISA @EXPORT);
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# set the version for version checking
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$VERSION = 3.07.00.049;
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=head1 NAME
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C4::Input - Miscellaneous sanity checks
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=head1 SYNOPSIS
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use C4::Input;
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=head1 DESCRIPTION
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This module provides functions to see whether a given library card
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number or ISBN is valid.
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=head1 FUNCTIONS
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=over 2
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=cut
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@ISA = qw(Exporter);
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@EXPORT = qw(
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&checkdigit
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);
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=item checkdigit
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$valid = &checkdigit($cardnumber $nounique);
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Takes a card number, computes its check digit, and compares it to the
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checkdigit at the end of C<$cardnumber>. Returns a true value iff
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C<$cardnumber> has a valid check digit.
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=cut
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#'
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sub checkdigit ($;$) {
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my ($infl, $nounique) = @_;
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$infl = uc $infl;
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# Check to make sure the cardnumber is unique
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#FIXME: We should make the error for a nonunique cardnumber
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#different from the one where the checkdigit on the number is
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#not correct
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unless ( $nounique )
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{
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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 )
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{
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return 0;
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}
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}
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if (C4::Context->preference("checkdigit") eq "none") {
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return 1;
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}
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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;
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}
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my $rem = ($sum%11);
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if ($rem == 10) {
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$rem = "X";
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}
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if ($rem eq substr($infl,8,1)) {
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return 1;
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}
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return 0;
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} # sub checkdigit
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END { } # module clean-up code here (global destructor)
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1;
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__END__
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=back
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=head1 AUTHOR
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Koha Development Team <http://koha-community.org/>
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=cut
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