140 lines
4.6 KiB
Perl
140 lines
4.6 KiB
Perl
package C4::SearchMarc;
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# Copyright 2000-2002 Katipo Communications
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#
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# This file is part of Koha.
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#
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# Koha is free software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
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# Suite 330, Boston, MA 02111-1307 USA
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use strict;
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require Exporter;
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use DBI;
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use C4::Context;
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use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
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# set the version for version checking
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$VERSION = 0.02;
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=head1 NAME
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C4::Search - Functions for searching the Koha MARC catalog
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=head1 SYNOPSIS
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use C4::Search;
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my ($count, @results) = catalogsearch();
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=head1 DESCRIPTION
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This module provides the searching facilities for the Koha MARC catalog
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C<&catalogsearch> is a front end to all the other searches. Depending
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on what is passed to it, it calls the appropriate search function.
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=head1 FUNCTIONS
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=over 2
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=cut
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@ISA = qw(Exporter);
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@EXPORT = qw(&catalogsearch);
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# make all your functions, whether exported or not;
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# marcsearch : search in the MARC biblio table.
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# everything is choosen by the user : what to search, the conditions...
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# FIXME this is a 1st version of the Marc Search. It does not use fulltext searching or marc_words table
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sub catalogsearch {
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my ($dbh, $tags, $subfields, $and_or, $excluding, $operator, $value, $offset,$length) = @_;
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# build the sql request. She will look like :
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# select m1.bibid
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# from marc_subfield_table as m1, marc_subfield_table as m2
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# where m1.bibid=m2.bibid and
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# (m1.subfieldvalue like "Des%" and m2.subfieldvalue like "27%")
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my $sql_tables; # will contain marc_subfield_table as m1,...
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my $sql_where1; # will contain the "true" where
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my $sql_where2; # will contain m1.bibid=m2.bibid
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my $nb=1;
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for(my $i=0; $i<=@$tags;$i++) {
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if (@$tags[$i] && @$value[$i]) {
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$sql_tables .= "marc_subfield_table as m$nb,";
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if ($nb==1) {
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if (@$operator[$i] eq "starts") {
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$sql_where1 .= "@$excluding[$i](m1.subfieldvalue like '@$value[$i] %' and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]')";
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} elsif (@$operator[$i] eq "contains") {
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$sql_where1 .= "@$excluding[$i](m1.subfieldvalue like '%@$value[$i]%' and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]')";
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} else {
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$sql_where1 .= "@$excluding[$i](m1.subfieldvalue @$operator[$i] '@$value[$i]' and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]')";
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}
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} else {
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if (@$operator[$i] eq "starts") {
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$sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb.subfieldvalue like '@$value[$i]%' and m$nb.tag=@$tags[$i] and m$nb.subfieldcode='@$subfields[$i]')";
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$sql_where2 .= "m1.bibid=m$nb.bibid";
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} elsif (@$operator[$i] eq "contains") {
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$sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb.subfieldvalue like '%@$value[$i]%' and m$nb.tag=@$tags[$i] and m$nb.subfieldcode='@$subfields[$i]')";
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$sql_where2 .= "m1.bibid=m$nb.bibid";
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} else {
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$sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb.subfieldvalue @$operator[$i] '@$value[$i]' and m$nb.tag=@$tags[$i] and m$nb.subfieldcode='@$subfields[$i]')";
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$sql_where2 .= "m1.bibid=m$nb.bibid";
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}
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}
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$nb++;
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}
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}
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chop $sql_tables;
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warn "select m1.bibid from $sql_tables where $sql_where2 and ($sql_where1)";
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my $sth;
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if ($sql_where2) {
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$sth = $dbh->prepare("select m1.bibid from $sql_tables where $sql_where2 and ($sql_where1)");
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} else {
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$sth = $dbh->prepare("select m1.bibid from $sql_tables where $sql_where1");
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}
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$sth->execute;
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my @result;
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while (my ($bibid) = $sth->fetchrow) {
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push @result,$bibid;
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}
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# we have bibid list. Now, loads title and author from [offset] to [offset]+[length]
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my $counter = $offset;
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$sth = $dbh->prepare("select author,title from biblio,marc_biblio where biblio.biblionumber=marc_biblio.biblionumber and bibid=?");
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my @finalresult = ();
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while ($counter <= ($offset + $length)) {
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$sth->execute($result[$counter]);
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my ($author,$title) = $sth->fetchrow;
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my %line;
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$line{bibid}=$result[$counter];
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$line{author}=$author;
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$line{title}=$title;
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push @finalresult, \%line;
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$counter++;
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}
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return @finalresult;
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}
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END { } # module clean-up code here (global destructor)
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1;
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__END__
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=back
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=head1 AUTHOR
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Koha Developement team <info@koha.org>
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=cut
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