Koha/C4/Members.pm
2004-02-11 08:35:31 +00:00

113 lines
2.9 KiB
Perl

# -*- tab-width: 8 -*-
package C4::Members;
# Copyright 2000-2003 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;
require Exporter;
use C4::Context;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK);
$VERSION = 0.01;
=head1 NAME
C4::Members - Perl Module containing convenience functions for member handling
=head1 SYNOPSIS
=head1 DESCRIPTION
=head1 FUNCTIONS
=over 2
=cut
@ISA = qw(Exporter);
@EXPORT = qw();
@EXPORT_OK = qw(
&fixup_cardnumber
);
################################################################################
=item fixup_cardnumber
Warning: The caller is responsible for locking the members table in write
mode, to avoid database corruption.
=cut
use vars qw( @weightings );
my @weightings = (8,4,6,3,5,2,1);
sub fixup_cardnumber ($) {
my($cardnumber) = @_;
my $autonumber_members = C4::Context->boolean_preference('autoMemberNum');
$autonumber_members = 0 unless defined $autonumber_members;
# Find out whether member numbers should be generated
# automatically. Should be either "1" or something else.
# Defaults to "0", which is interpreted as "no".
if ($cardnumber !~ /\S/ && $autonumber_members) {
my $dbh = C4::Context->dbh;
my $sth=$dbh->prepare("select max(substring(borrowers.cardnumber,2,7)) from borrowers");
$sth->execute;
my $data=$sth->fetchrow_hashref;
$cardnumber=$data->{'max(substring(borrowers.cardnumber,2,7))'};
$sth->finish;
# purpose: generate checksum'd member numbers.
# We'll assume we just got the max value of digits 2-8 of member #'s
# from the database and our job is to increment that by one,
# determine the 1st and 9th digits and return the full string.
if (! $cardnumber) { # If DB has no values,
$cardnumber = 1000000; # start at 1000000
} else {
$cardnumber += 1;
}
my $sum = 0;
for (my $i = 0; $i < 8; $i += 1) {
# read weightings, left to right, 1 char at a time
my $temp1 = $weightings[$i];
# sequence left to right, 1 char at a time
my $temp2 = substr($cardnumber,$i,1);
# mult each char 1-7 by its corresponding weighting
$sum += $temp1 * $temp2;
}
my $rem = ($sum%11);
$rem = 'X' if $rem == 10;
$cardnumber="V$cardnumber$rem";
}
return $cardnumber;
}
1;