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 $nb=1;
  72         warn "value : ".@$value;
  73         for(my $i=0; $i<=@$value;$i++) {
  74                 if (@$value[$i]) {
  75                         if ($nb==1) {
  76                                 if (@$operator[$i] eq "starts") {
  77                                         $sql_tables .= "marc_subfield_table as m$nb,";
  78                                         $sql_where1 .= "@$excluding[$i](m1.subfieldvalue like '@$value[$i]%'";
  79                                         if (@$tags[$i]) {
  80                                                 $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]'";
  81                                         }
  82                                         $sql_where1.=")";
  83                                 } elsif (@$operator[$i] eq "contains") {
  84                                         $sql_tables .= "marc_word as m$nb,";
  85                                         $sql_where1 .= "@$excluding[$i](m1.word ='@$value[$i]'";
  86                                         if (@$tags[$i]) {
  87                                                  $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldid='@$subfields[$i]'";
  88                                         }
  89                                         $sql_where1.=")";
  90                                 } else {
  91                                         $sql_tables .= "marc_subfield_table as m$nb,";
  92                                         $sql_where1 .= "@$excluding[$i](m1.subfieldvalue @$operator[$i] '@$value[$i]' ";
  93                                         if (@$tags[$i]) {
  94                                                  $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]'";
  95                                         }
  96                                         $sql_where1.=")";
  97                                 }
  98                         } else {
  99                                 if (@$operator[$i] eq "starts") {
 100                                         $sql_tables .= "marc_subfield_table as m$nb,";
 101                                         $sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb.subfieldvalue like '@$value[$i]%'";
 102                                         if (@$tags[$i]) {
 103                                                  $sql_where1 .=" and m$nb.tag=@$tags[$i] and m$nb.subfieldcode='@$subfields[$i])";
 104                                         }
 105                                         $sql_where1.=")";
 106                                         $sql_where2 .= "m1.bibid=m$nb.bibid";
 107                                 } elsif (@$operator[$i] eq "contains") {
 108                                         $sql_tables .= "marc_word as m$nb,";
 109                                         $sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb.word='@$value[$i]'";
 110                                         if (@$tags[$i]) {
 111                                                  $sql_where1 .="  and m$nb.tag=@$tags[$i] and m$nb.subfieldid='@$subfields[$i]'";
 112                                         }
 113                                         $sql_where1.=")";
 114                                         $sql_where2 .= "m1.bibid=m$nb.bibid";
 115                                 } else {
 116                                         $sql_tables .= "marc_subfield_table as m$nb,";
 117                                         $sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb.subfieldvalue @$operator[$i] '@$value[$i]'";
 118                                         if (@$tags[$i]) {
 119                                                  $sql_where1 .="  and m$nb.tag=@$tags[$i] and m$nb.subfieldcode='@$subfields[$i]'";
 120                                         }
 121                                         $sql_where2 .= "m1.bibid=m$nb.bibid";
 122                                         $sql_where1.=")";
 123                                 }
 124                         }
 125                         $nb++;
 126                 }
 127         }
 128         chop $sql_tables;
 129         my $sth;
 130         if ($sql_where2) {
 131                 $sth = $dbh->prepare("select m1.bibid from $sql_tables where $sql_where2 and ($sql_where1)");
 132         } else {
 133                 $sth = $dbh->prepare("select m1.bibid from $sql_tables where $sql_where1");
 134         }
 135         $sth->execute;
 136         my @result;
 137         while (my ($bibid) = $sth->fetchrow) {
 138                 push @result,$bibid;
 139         }
 140         # we have bibid list. Now, loads title and author from [offset] to [offset]+[length]
 141         my $counter = $offset;
 142         $sth = $dbh->prepare("select author,title from biblio,marc_biblio where biblio.biblionumber=marc_biblio.biblionumber and bibid=?");
 143         my @finalresult = ();
 144         while ($counter <= ($offset + $length)) {
 145                 $sth->execute($result[$counter]);
 146                 my ($author,$title) = $sth->fetchrow;
 147                 my %line;
 148                 $line{bibid}=$result[$counter];
 149                 $line{author}=$author;
 150                 $line{title}=$title;
 151                 push @finalresult, \%line;
 152                 $counter++;
 153         }
 154         return @finalresult;
 155 }
 156
 157 END { }       # module clean-up code here (global destructor)
 158
 159 1;
 160 __END__
 161
 162 =back
 163
 164 =head1 AUTHOR
 165
 166 Koha Developement team <info@koha.org>
 167
 168 =cut