package C4::ClassSortRoutine::LCC;

# Copyright (C) 2007 LibLime
# Copyright (C) 2012 Equinox Software, Inc.
# 
# 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 3 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, see <http://www.gnu.org/licenses>.

use strict;
use warnings;
use Library::CallNumber::LC;



=head1 NAME 

C4::ClassSortRoutine::LCC - generic call number sorting key routine

=head1 SYNOPSIS

use C4::ClassSortRoutine;

my $cn_sort = GetClassSortKey('LCC', $cn_class, $cn_item);

=head1 FUNCTIONS

=head2 get_class_sort_key

  my $cn_sort = C4::ClassSortRoutine::LCC::LCC($cn_class, $cn_item);

Generates sorting key for LC call numbers.

=cut

sub get_class_sort_key {
    my ($cn_class, $cn_item) = @_;

    $cn_class = '' unless defined $cn_class;
    $cn_item  = '' unless defined $cn_item;
    my $call_number = Library::CallNumber::LC->new(uc "$cn_class $cn_item");
    return '' unless defined $call_number;
    my $key = $call_number->normalize();
    $key = '' unless defined $key;
    return $key;

}

1;

=head1 AUTHOR

Koha Development Team <http://koha-community.org/>

=cut