3 # Copyright (C) 2008 LibLime
5 # This file is part of Koha.
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
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.
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.
21 #use warnings; FIXME - Bug 2505
25 use C4::Heading::MARC21;
38 my $heading = C4::Heading->new_from_bib_field($field);
39 my $thesaurus = $heading->thesaurus();
40 my $type = $heading->type();
41 my $display_heading = $heading->display();
42 my $search_string = $heading->search_string();
46 C<C4::Heading> implements a simple class to representing
47 headings found in bibliographic and authority records.
51 =head2 new_from_bib_field
53 my $heading = C4::Heading->new_from_bib_field($field[, $marc_flavour]);
55 Given a C<MARC::Field> object containing a heading from a
56 bib record, create a C<C4::Heading> object.
58 The optional second parameter is the MARC flavour (i.e., MARC21
59 or UNIMARC); if this parameter is not supplied, it is
60 taken from the Koha application context.
62 If the MARC field supplied is not a valid heading, undef
67 sub new_from_bib_field {
70 my $marcflavour = @_ ? shift : C4::Context->preference('marcflavour');
72 my $marc_handler = _marc_format_handler($marcflavour);
74 my $tag = $field->tag();
75 return unless $marc_handler->valid_bib_heading_tag($tag);
78 ($self->{'auth_type'}, $self->{'subject_added_entry'}, $self->{'series_added_entry'}, $self->{'main_entry'},
79 $self->{'thesaurus'}, $self->{'search_form'}, $self->{'display_form'}) =
80 $marc_handler->parse_heading($field);
88 my $display = $heading->display_form();
90 Return the "canonical" display form of the heading.
96 return $self->{'display_form'};
101 my $authorities = $heading->authorities;
103 Return a list of authority records for this
110 my $query = qq(Match-heading,do-not-truncate,ext="$self->{'search_form'}");
111 $query .= $self->_query_limiters();
112 my ($error, $results, $total_hits) = SimpleSearch( $query, undef, undef, [ "authorityserver" ] );
113 if (defined $error) {
114 carp "Error:$error from search $query";
119 =head2 preferred_authorities
121 my $preferred_authorities = $heading->preferred_authorities;
123 Return a list of authority records for headings
124 that are a preferred form of the heading.
128 sub preferred_authorities {
130 my $query = "Match-heading-see-from,do-not-truncate,ext='$self->{'search_form'}'";
131 $query .= $self->_query_limiters();
132 my ($error, $results, $total_hits) = SimpleSearch( $query, undef, undef, [ "authorityserver" ] );
133 if (defined $error) {
134 carp "Error:$error from search $query";
139 =head1 INTERNAL METHODS
141 =head2 _query_limiters
145 sub _query_limiters {
148 my $limiters = " AND at='$self->{'auth_type'}'";
149 if ($self->{'subject_added_entry'}) {
150 $limiters .= " AND Heading-use-subject-added-entry=a"; # FIXME -- is this properly in C4::Heading::MARC21?
151 $limiters .= " AND Subject-heading-thesaurus=$self->{'thesaurus'}";
153 if ($self->{'series_added_entry'}) {
154 $limiters .= " AND Heading-use-series-added-entry=a"; # FIXME -- is this properly in C4::Heading::MARC21?
156 if (not $self->{'subject_added_entry'} and not $self->{'series_added_entry'}) {
157 $limiters .= " AND Heading-use-main-or-added-entry=a" # FIXME -- is this properly in C4::Heading::MARC21?
162 =head1 INTERNAL FUNCTIONS
164 =head2 _marc_format_handler
166 Returns a C4::Heading::MARC21 or C4::Heading::UNIMARC object
167 depending on the selected MARC flavour.
171 sub _marc_format_handler {
172 my $marcflavour = shift;
174 if ($marcflavour eq 'UNIMARC') {
175 return C4::Heading::UNIMARC->new();
177 return C4::Heading::MARC21->new();
184 Koha Development Team <http://koha-community.org/>
186 Galen Charlton <galen.charlton@liblime.com>