File Coverage

File:C4/Heading.pm
Coverage:26.4%

linestmtbrancondsubtimecode
1package C4::Heading;
2
3# Copyright (C) 2008 LibLime
4#
5# This file is part of Koha.
6#
7# Koha is free software; you can redistribute it and/or modify it under the
8# terms of the GNU General Public License as published by the Free Software
9# Foundation; either version 2 of the License, or (at your option) any later
10# version.
11#
12# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
13# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
15#
16# You should have received a copy of the GNU General Public License along
17# with Koha; if not, write to the Free Software Foundation, Inc.,
18# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19
20
3
3
3
3
23189
7
82
use strict;
21#use warnings; FIXME - Bug 2505
22
3
3
3
3
261
9766
130
use MARC::Record;
23
3
3
3
3
13
22
96
use MARC::Field;
24
3
3
3
3
236
27
70
use C4::Context;
25
3
3
3
3
1173
10
98
use C4::Heading::MARC21;
26
3
3
3
3
21
8
1939
use Carp;
27
28our $VERSION = 3.00;
29
30 - 64
=head1 NAME

C4::Heading

=head1 SYNOPSIS

 use C4::Heading;
 my $heading = C4::Heading->new_from_bib_field($field);
 my $thesaurus = $heading->thesaurus();
 my $type = $heading->type();
 my $display_heading = $heading->display();
 my $search_string = $heading->search_string();

=head1 DESCRIPTION

C<C4::Heading> implements a simple class to representing
headings found in bibliographic and authority records.

=head1 METHODS

=head2 new_from_bib_field

  my $heading = C4::Heading->new_from_bib_field($field[, $marc_flavour]);

Given a C<MARC::Field> object containing a heading from a 
bib record, create a C<C4::Heading> object.

The optional second parameter is the MARC flavour (i.e., MARC21
or UNIMARC); if this parameter is not supplied, it is
taken from the Koha application context.

If the MARC field supplied is not a valid heading, undef
is returned.

=cut
65
66sub new_from_bib_field {
67
0
0
    my $class = shift;
68
0
    my $field = shift;
69
0
0
    my $marcflavour = @_ ? shift : C4::Context->preference('marcflavour');
70
71
0
    my $marc_handler = _marc_format_handler($marcflavour);
72
73
0
    my $tag = $field->tag();
74
0
0
    return unless $marc_handler->valid_bib_heading_tag($tag);
75
0
    my $self = {};
76
77
0
    ($self->{'auth_type'}, $self->{'subject_added_entry'}, $self->{'series_added_entry'}, $self->{'main_entry'},
78     $self->{'thesaurus'}, $self->{'search_form'}, $self->{'display_form'}) =
79        $marc_handler->parse_heading($field);
80
81
0
    bless $self, $class;
82
0
    return $self;
83}
84
85 - 91
=head2 display_form

  my $display = $heading->display_form();

Return the "canonical" display form of the heading.

=cut
92
93sub display_form {
94
0
0
    my $self = shift;
95
0
    return $self->{'display_form'};
96}
97
98 - 105
=head2 authorities

  my $authorities = $heading->authorities;

Return a list of authority records for this 
heading.

=cut
106
107sub authorities {
108
0
0
    my $self = shift;
109
0
    my $query = qq(Match-heading,do-not-truncate,ext="$self->{'search_form'}");
110
0
    $query .= $self->_query_limiters();
111
0
    require C4::Search;
112
0
    my ($error, $results, $total_hits) = C4::Search::SimpleSearch( $query, undef, undef, [ "authorityserver" ] );
113
0
0
    if (defined $error) {
114
0
        carp "Error:$error from search $query";
115    }
116
0
    return $results;
117}
118
119 - 126
=head2 preferred_authorities

  my $preferred_authorities = $heading->preferred_authorities;

Return a list of authority records for headings
that are a preferred form of the heading.

=cut
127
128sub preferred_authorities {
129
0
0
    my $self = shift;
130
0
    my $query = "Match-heading-see-from,do-not-truncate,ext='$self->{'search_form'}'";
131
0
    $query .= $self->_query_limiters();
132
0
    require C4::Search;
133
0
    my ($error, $results, $total_hits) = C4::Search::SimpleSearch( $query, undef, undef, [ "authorityserver" ] );
134
0
0
    if (defined $error) {
135
0
        carp "Error:$error from search $query";
136    }
137
0
    return $results;
138}
139
140 - 144
=head1 INTERNAL METHODS

=head2 _query_limiters

=cut
145
146sub _query_limiters {
147
0
0
    my $self = shift;
148
149
0
    my $limiters = " AND at='$self->{'auth_type'}'";
150
0
0
    if ($self->{'subject_added_entry'}) {
151
0
        $limiters .= " AND Heading-use-subject-added-entry=a"; # FIXME -- is this properly in C4::Heading::MARC21?
152
0
        $limiters .= " AND Subject-heading-thesaurus=$self->{'thesaurus'}";
153    }
154
0
0
    if ($self->{'series_added_entry'}) {
155
0
        $limiters .= " AND Heading-use-series-added-entry=a"; # FIXME -- is this properly in C4::Heading::MARC21?
156    }
157
0
0
0
    if (not $self->{'subject_added_entry'} and not $self->{'series_added_entry'}) {
158
0
        $limiters .= " AND Heading-use-main-or-added-entry=a" # FIXME -- is this properly in C4::Heading::MARC21?
159    }
160
0
    return $limiters;
161}
162
163 - 170
=head1 INTERNAL FUNCTIONS

=head2 _marc_format_handler

Returns a C4::Heading::MARC21 or C4::Heading::UNIMARC object
depending on the selected MARC flavour.

=cut
171
172sub _marc_format_handler {
173
0
0
    my $marcflavour = shift;
174
175
0
0
    if ($marcflavour eq 'UNIMARC') {
176
0
        return C4::Heading::UNIMARC->new();
177    } else {
178
0
        return C4::Heading::MARC21->new();
179    }
180
181}
182
183 - 189
=head1 AUTHOR

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

Galen Charlton <galen.charlton@liblime.com>

=cut
190
1911;