104 lines
2.9 KiB
Perl
104 lines
2.9 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 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 <https://www.gnu.org/licenses>.
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
=head1 NAME
|
|
|
|
C4::ClassSortRoutine::Dewey - generic call number sorting key routine
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
use C4::ClassSortRoutine qw( GetClassSortKey );
|
|
|
|
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 ) = @_;
|
|
|
|
$cn_class = '' unless defined $cn_class;
|
|
$cn_item = '' unless defined $cn_item;
|
|
my $init = uc "$cn_class $cn_item";
|
|
$init =~ s/^\s+//;
|
|
$init =~ s/\s+$//;
|
|
$init =~ s/\// /g;
|
|
$init =~ s!/!!g;
|
|
$init =~ s/^([\p{IsAlpha}]+)/$1 /;
|
|
my @tokens = split /\.|\s+/, $init;
|
|
my $digit_group_count = 0;
|
|
my $first_digit_group_idx;
|
|
|
|
for ( my $i = 0 ; $i <= $#tokens ; $i++ ) {
|
|
if ( $tokens[$i] =~ /^\d+$/ ) {
|
|
$digit_group_count++;
|
|
if ( 1 == $digit_group_count ) {
|
|
$first_digit_group_idx = $i;
|
|
}
|
|
if ( 2 == $digit_group_count ) {
|
|
if ( $i - $first_digit_group_idx == 1 ) {
|
|
$tokens[$i] = sprintf( "%-15.15s", $tokens[$i] );
|
|
$tokens[$i] =~ tr/ /0/;
|
|
} else {
|
|
$tokens[$first_digit_group_idx] .= '_000000000000000';
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
# Pad the first digit_group if there was only one
|
|
if ( 1 == $digit_group_count ) {
|
|
$tokens[$first_digit_group_idx] .= '_000000000000000';
|
|
}
|
|
my $key = join( "_", @tokens );
|
|
$key =~ s/[^\p{IsAlnum}_]//g;
|
|
|
|
return $key;
|
|
|
|
}
|
|
|
|
1;
|
|
|
|
=head1 AUTHOR
|
|
|
|
Koha Development Team <https://koha-community.org/>
|
|
|
|
=cut
|
|
|