Koha/C4/ClassSortRoutine/Dewey.pm
Galen Charlton 7e044751ef ignore "/" when sorting Dewey call numbers
Signed-off-by: Chris Cormack <crc@liblime.com>
Signed-off-by: Joshua Ferraro <jmf@liblime.com>
2007-10-23 18:24:29 -05:00

91 lines
2.4 KiB
Perl

package C4::ClassSortRoutine::Dewey;
# Copyright (C) 2007 LibLime
#
# 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 vars qw($VERSION);
# set the version for version checking
$VERSION = 3.00;
=head1 NAME
C4::ClassSortRoutine::Dewey - generic call number sorting key routine
=head1 SYNOPSIS
use C4::ClassSortRoutine;
my $cn_sort = GetClassSortKey('Dewey', $cn_class, $cn_item);
=head1 FUNCTIONS
=head2 get_class_sort_key
my $cn_sort = C4::ClassSortRoutine::Dewey::Dewey($cn_class, $cn_item);
Generates sorting key using the following rules:
* Concatenates class and item part.
* Converts to uppercase.
* Removes leading and trailing whitespace and '/'
* Separates alphabetic prefix from the rest of the call number
* Splits into tokens on whitespaces and periods.
* Leaves first digit group as is.
* Converts second digit group to 15-digit long group, padded on right with zeroes.
* Converts each run of whitespace to an underscore.
* Removes any remaining non-alphabetical, non-numeric, non-underscore characters.
=cut
sub get_class_sort_key {
my ($cn_class, $cn_item) = @_;
my $init = uc "$cn_class $cn_item";
$init =~ s/^\s+//;
$init =~ s/\s+$//;
$init =~ s!/!!g;
$init =~ s/^([\p{IsAlpha}]+)/$1 /;
my @tokens = split /\.|\s+/, $init;
my $digit_group_count = 0;
for (my $i = 0; $i <= $#tokens; $i++) {
if ($tokens[$i] =~ /^\d+$/) {
$digit_group_count++;
if (2 == $digit_group_count) {
$tokens[$i] = sprintf("%-15.15s", $tokens[$i]);
$tokens[$i] =~ tr/ /0/;
}
}
}
my $key = join("_", @tokens);
$key =~ s/[^\p{IsAlnum}_]//g;
return $key;
}
1;
=head1 AUTHOR
Koha Developement team <info@koha.org>
=cut