|
Lines 1-122
Link Here
|
| 1 |
package C4::Input; #assumes C4/Input |
|
|
| 2 |
|
| 3 |
|
| 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 |
| 9 |
# under the terms of the GNU General Public License as published by |
| 10 |
# the Free Software Foundation; either version 3 of the License, or |
| 11 |
# (at your option) any later version. |
| 12 |
# |
| 13 |
# Koha is distributed in the hope that it will be useful, but |
| 14 |
# WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 |
# GNU General Public License for more details. |
| 17 |
# |
| 18 |
# You should have received a copy of the GNU General Public License |
| 19 |
# along with Koha; if not, see <http://www.gnu.org/licenses>. |
| 20 |
|
| 21 |
use strict; |
| 22 |
use warnings; |
| 23 |
|
| 24 |
require Exporter; |
| 25 |
use C4::Context; |
| 26 |
use CGI qw ( -utf8 ); |
| 27 |
|
| 28 |
use vars qw($VERSION @ISA @EXPORT); |
| 29 |
|
| 30 |
# set the version for version checking |
| 31 |
$VERSION = 3.07.00.049; |
| 32 |
|
| 33 |
=head1 NAME |
| 34 |
|
| 35 |
C4::Input - Miscellaneous sanity checks |
| 36 |
|
| 37 |
=head1 SYNOPSIS |
| 38 |
|
| 39 |
use C4::Input; |
| 40 |
|
| 41 |
=head1 DESCRIPTION |
| 42 |
|
| 43 |
This module provides functions to see whether a given library card |
| 44 |
number or ISBN is valid. |
| 45 |
|
| 46 |
=head1 FUNCTIONS |
| 47 |
|
| 48 |
=over 2 |
| 49 |
|
| 50 |
=cut |
| 51 |
|
| 52 |
@ISA = qw(Exporter); |
| 53 |
@EXPORT = qw( |
| 54 |
&checkdigit |
| 55 |
); |
| 56 |
|
| 57 |
=item checkdigit |
| 58 |
|
| 59 |
$valid = &checkdigit($cardnumber $nounique); |
| 60 |
|
| 61 |
Takes a card number, computes its check digit, and compares it to the |
| 62 |
checkdigit at the end of C<$cardnumber>. Returns a true value iff |
| 63 |
C<$cardnumber> has a valid check digit. |
| 64 |
|
| 65 |
=cut |
| 66 |
|
| 67 |
#' |
| 68 |
sub checkdigit ($;$) { |
| 69 |
|
| 70 |
my ($infl, $nounique) = @_; |
| 71 |
$infl = uc $infl; |
| 72 |
|
| 73 |
# Check to make sure the cardnumber is unique |
| 74 |
|
| 75 |
#FIXME: We should make the error for a nonunique cardnumber |
| 76 |
#different from the one where the checkdigit on the number is |
| 77 |
#not correct |
| 78 |
|
| 79 |
unless ( $nounique ) |
| 80 |
{ |
| 81 |
my $query=qq{SELECT * FROM borrowers WHERE cardnumber=?}; |
| 82 |
my $sth=C4::Context->prepare($query); |
| 83 |
$sth->execute($infl); |
| 84 |
my %results = $sth->fetchrow_hashref(); |
| 85 |
if ( $sth->rows != 0 ) |
| 86 |
{ |
| 87 |
return 0; |
| 88 |
} |
| 89 |
} |
| 90 |
if (C4::Context->preference("checkdigit") eq "none") { |
| 91 |
return 1; |
| 92 |
} |
| 93 |
|
| 94 |
my @weightings = (8,4,6,3,5,2,1); |
| 95 |
my $sum; |
| 96 |
foreach my $i (1..7) { |
| 97 |
my $temp1 = $weightings[$i-1]; |
| 98 |
my $temp2 = substr($infl,$i,1); |
| 99 |
$sum += $temp1 * $temp2; |
| 100 |
} |
| 101 |
my $rem = ($sum%11); |
| 102 |
if ($rem == 10) { |
| 103 |
$rem = "X"; |
| 104 |
} |
| 105 |
if ($rem eq substr($infl,8,1)) { |
| 106 |
return 1; |
| 107 |
} |
| 108 |
return 0; |
| 109 |
} # sub checkdigit |
| 110 |
|
| 111 |
END { } # module clean-up code here (global destructor) |
| 112 |
|
| 113 |
1; |
| 114 |
__END__ |
| 115 |
|
| 116 |
=back |
| 117 |
|
| 118 |
=head1 AUTHOR |
| 119 |
|
| 120 |
Koha Development Team <http://koha-community.org/> |
| 121 |
|
| 122 |
=cut |