1 package C4::Input; #assumes C4/Input
4 # Copyright 2000-2002 Katipo Communications
6 # This file is part of Koha.
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
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.
17 # You should have received a copy of the GNU General Public License along with
18 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
19 # Suite 330, Boston, MA 02111-1307 USA
26 use vars qw($VERSION @ISA @EXPORT);
28 # set the version for version checking
33 C4::Input - Miscellaneous sanity checks
41 This module provides functions to see whether a given library card
42 number or ISBN is valid.
52 &checkdigit &checkvalidisbn
58 $valid = &checkdigit($cardnumber $nounique);
60 Takes a card number, computes its check digit, and compares it to the
61 checkdigit at the end of C<$cardnumber>. Returns a true value iff
62 C<$cardnumber> has a valid check digit.
68 my ($infl, $nounique) = @_;
72 #Check to make sure the cardnumber is unique
74 #FIXME: We should make the error for a nonunique cardnumber
75 #different from the one where the checkdigit on the number is
80 my $dbh=C4::Context->dbh;
81 my $query=qq{SELECT * FROM borrowers WHERE cardnumber=?};
82 my $sth=$dbh->prepare($query);
84 my %results = $sth->fetchrow_hashref();
85 if ( $sth->rows != 0 )
90 if (C4::Context->preference("checkdigit") eq "none") {
94 my @weightings = (8,4,6,3,5,2,1);
100 my $temp1 = $weightings[$i-1];
101 my $temp2 = substr($infl,$i,1);
102 $sum += $temp1 * $temp2;
108 if ($rem eq substr($infl,8,1)) {
116 $valid = &checkvalidisbn($isbn);
118 Returns a true value iff C<$isbn> is a valid ISBN: it must be ten
119 digits long (counting "X" as a digit), and must have a valid check
124 #--------------------------------------
125 # Determine if a number is a valid ISBN number, according to length
126 # of 10 digits and valid checksum
129 my ($q)=@_ ; # Input: ISBN number
131 my $isbngood = 0; # Return: true or false
133 $q=~s/x$/X/g; # upshift lower case X
137 #return 0 if $q is not ten digits long
138 if (length($q)!=10) {
142 #If we get to here, length($q) must be 10
143 my $checksum=substr($q,9,1);
144 my $isbn=substr($q,0,9);
147 for ($i=0; $i<9; $i++) {
148 my $digit=substr($q,$i,1);
152 ($c==10) && ($c='X');
153 $isbngood = $c eq $checksum;
156 } # sub checkvalidisbn
160 $CGIScrollingList = &BuildCGISort($name string, $input_name string);
162 Returns the scrolling list with name $input_name, built on authorised Values named $name.
163 Returns NULL if no authorised values found
168 my ($name,$input_name,$data) = @_;
169 my $dbh=C4::Context->dbh;
170 my $query=qq{SELECT * FROM authorised_values WHERE category=? order by lib};
171 my $sth=$dbh->prepare($query);
172 $sth->execute($name);
178 for (my $i =0;$i<$sth->rows;$i++){
179 my $results = $sth->fetchrow_hashref;
180 push @values, $results->{authorised_value};
181 $labels{$results->{authorised_value}}=$results->{lib};
184 $CGISort= CGI::scrolling_list(
185 -name => $input_name,
195 END { } # module clean-up code here (global destructor)
204 Koha Developement team <info@koha.org>