fix for 361
[koha.git] / C4 / SearchMarc.pm
1 package C4::SearchMarc;
2
3 # Copyright 2000-2002 Katipo Communications
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 with
17 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
18 # Suite 330, Boston, MA  02111-1307 USA
19
20 use strict;
21 require Exporter;
22 use DBI;
23 use C4::Context;
24
25 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
26
27 # set the version for version checking
28 $VERSION = 0.02;
29
30 =head1 NAME
31
32 C4::Search - Functions for searching the Koha MARC catalog
33
34 =head1 SYNOPSIS
35
36   use C4::Search;
37
38   my ($count, @results) = catalogsearch();
39
40 =head1 DESCRIPTION
41
42 This module provides the searching facilities for the Koha MARC catalog
43
44 C<&catalogsearch> is a front end to all the other searches. Depending
45 on what is passed to it, it calls the appropriate search function.
46
47 =head1 FUNCTIONS
48
49 =over 2
50
51 =cut
52
53 @ISA = qw(Exporter);
54 @EXPORT = qw(&catalogsearch);
55 # make all your functions, whether exported or not;
56
57 # marcsearch : search in the MARC biblio table.
58 # everything is choosen by the user : what to search, the conditions...
59
60 sub catalogsearch {
61         my ($dbh, $tags, $subfields, $and_or, $excluding, $operator, $value, $offset,$length) = @_;
62         # build the sql request. She will look like :
63         # select m1.bibid
64         #               from marc_subfield_table as m1, marc_subfield_table as m2
65         #               where m1.bibid=m2.bibid and
66         #               (m1.subfieldvalue like "Des%" and m2.subfieldvalue like "27%")
67
68         my $sql_tables; # will contain marc_subfield_table as m1,...
69         my $sql_where1; # will contain the "true" where
70         my $sql_where2; # will contain m1.bibid=m2.bibid
71         my $nb=1;
72         for(my $i=0; $i<=@$value;$i++) {
73                 if (@$value[$i]) {
74                         if ($nb==1) {
75                                 if (@$operator[$i] eq "start") {
76                                         $sql_tables .= "marc_subfield_table as m$nb,";
77                                         $sql_where1 .= "@$excluding[$i](m1.subfieldvalue like '@$value[$i]%'";
78                                         if (@$tags[$i]) {
79                                                 $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]'";
80                                         }
81                                         $sql_where1.=")";
82                                 } elsif (@$operator[$i] eq "contains") {
83                                         $sql_tables .= "marc_word as m$nb,";
84                                         $sql_where1 .= "@$excluding[$i](m1.word ='@$value[$i]'";
85                                         if (@$tags[$i]) {
86                                                  $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldid='@$subfields[$i]'";
87                                         }
88                                         $sql_where1.=")";
89                                 } else {
90                                         $sql_tables .= "marc_subfield_table as m$nb,";
91                                         $sql_where1 .= "@$excluding[$i](m1.subfieldvalue @$operator[$i] '@$value[$i]' ";
92                                         if (@$tags[$i]) {
93                                                  $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]'";
94                                         }
95                                         $sql_where1.=")";
96                                 }
97                         } else {
98                                 if (@$operator[$i] eq "start") {
99                                         $sql_tables .= "marc_subfield_table as m$nb,";
100                                         $sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb.subfieldvalue like '@$value[$i]%'";
101                                         if (@$tags[$i]) {
102                                                  $sql_where1 .=" and m$nb.tag=@$tags[$i] and m$nb.subfieldcode='@$subfields[$i])";
103                                         }
104                                         $sql_where1.=")";
105                                         $sql_where2 .= "m1.bibid=m$nb.bibid";
106                                 } elsif (@$operator[$i] eq "contains") {
107                                         $sql_tables .= "marc_word as m$nb,";
108                                         $sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb.word='@$value[$i]'";
109                                         if (@$tags[$i]) {
110                                                  $sql_where1 .="  and m$nb.tag=@$tags[$i] and m$nb.subfieldid='@$subfields[$i]'";
111                                         }
112                                         $sql_where1.=")";
113                                         $sql_where2 .= "m1.bibid=m$nb.bibid";
114                                 } else {
115                                         $sql_tables .= "marc_subfield_table as m$nb,";
116                                         $sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb.subfieldvalue @$operator[$i] '@$value[$i]'";
117                                         if (@$tags[$i]) {
118                                                  $sql_where1 .="  and m$nb.tag=@$tags[$i] and m$nb.subfieldcode='@$subfields[$i]'";
119                                         }
120                                         $sql_where2 .= "m1.bibid=m$nb.bibid";
121                                         $sql_where1.=")";
122                                 }
123                         }
124                         $nb++;
125                 }
126         }
127         chop $sql_tables;
128         my $sth;
129         warn "HERE";
130         if ($sql_where2) {
131                 $sth = $dbh->prepare("select distinct m1.bibid from $sql_tables where $sql_where2 and ($sql_where1)");
132                 warn("-->select m1.bibid from $sql_tables where $sql_where2 and ($sql_where1)");
133         } else {
134                 $sth = $dbh->prepare("select distinct m1.bibid from $sql_tables where $sql_where1");
135                 warn("==>select m1.bibid from $sql_tables where $sql_where1");
136         }
137         $sth->execute;
138         my @result;
139         while (my ($bibid) = $sth->fetchrow) {
140                 push @result,$bibid;
141         }
142         # we have bibid list. Now, loads title and author from [offset] to [offset]+[length]
143         my $counter = $offset;
144         $sth = $dbh->prepare("select author,title from biblio,marc_biblio where biblio.biblionumber=marc_biblio.biblionumber and bibid=?");
145         my @finalresult = ();
146         while ($counter <= ($offset + $length)) {
147                 $sth->execute($result[$counter]);
148                 my ($author,$title) = $sth->fetchrow;
149                 my %line;
150                 $line{bibid}=$result[$counter];
151                 $line{author}=$author;
152                 $line{title}=$title;
153                 push @finalresult, \%line;
154                 $counter++;
155         }
156         return @finalresult;
157 }
158
159 END { }       # module clean-up code here (global destructor)
160
161 1;
162 __END__
163
164 =back
165
166 =head1 AUTHOR
167
168 Koha Developement team <info@koha.org>
169
170 =cut