Koha/OAI/Server/GetRecord.pm

   1 # Copyright Tamil s.a.r.l. 2008-2015
   2 # Copyright Biblibre 2008-2015
   3 #
   4 # This file is part of Koha.
   5 #
   6 # Koha is free software; you can redistribute it and/or modify it
   7 # under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # Koha is distributed in the hope that it will be useful, but
  12 # WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  18
  19 package Koha::OAI::Server::GetRecord;
  20
  21 use Modern::Perl;
  22 use HTTP::OAI;
  23 use C4::Biblio;
  24 use C4::OAI::Sets;
  25 use MARC::File::XML;
  26
  27 use base ("HTTP::OAI::GetRecord");
  28
  29
  30 sub new {
  31     my ($class, $repository, %args) = @_;
  32
  33     my $self = HTTP::OAI::GetRecord->new(%args);
  34
  35     my $prefix = $repository->{koha_identifier} . ':';
  36     my ($biblionumber) = $args{identifier} =~ /^$prefix(.*)/;
  37     my $items_included = $repository->items_included( $args{metadataPrefix} );
  38     my $dbh = C4::Context->dbh;
  39     my $sql = "
  40         SELECT timestamp
  41         FROM   biblioitems
  42         WHERE  biblionumber=?
  43     ";
  44     my @bind_params = ($biblionumber);
  45     if ( $items_included ) {
  46         # Take latest timestamp of biblio and any items
  47         # Or timestamp of deleted items where bib not deleted
  48         $sql .= "
  49             UNION
  50             SELECT deleteditems.timestamp FROM deleteditems JOIN biblio USING (biblionumber)
  51             WHERE deleteditems.biblionumber=?
  52             UNION
  53             SELECT timestamp from items
  54             WHERE biblionumber=?
  55         ";
  56         push @bind_params, $biblionumber;
  57         push @bind_params, $biblionumber;
  58         $sql = "
  59             SELECT max(timestamp)
  60             FROM ($sql) bib
  61         ";
  62     }
  63
  64     my $sth = $dbh->prepare( $sql ) || die( 'Could not prepare statement: ' . $dbh->errstr );
  65     $sth->execute( @bind_params ) || die( 'Could not execute statement: ' . $sth->errstr );
  66     my ($timestamp, $deleted);
  67     unless ( ($timestamp = $sth->fetchrow) ) {
  68         $sql = "
  69             SELECT timestamp
  70             FROM deletedbiblio
  71             WHERE biblionumber=?
  72         ";
  73         @bind_params = ($biblionumber);
  74
  75         if ( $items_included ) {
  76             # Take latest timestamp among biblio and items
  77             $sql .= "
  78                 UNION
  79                 SELECT timestamp from deleteditems
  80                 WHERE biblionumber=?
  81             ";
  82             push @bind_params, $biblionumber;
  83             $sql = "
  84                 SELECT max(timestamp)
  85                 FROM ($sql) bib
  86             ";
  87         }
  88
  89         $sth = $dbh->prepare($sql) || die('Could not prepare statement: ' . $dbh->errstr);
  90         $sth->execute( @bind_params ) || die('Could not execute statement: ' . $sth->errstr);
  91         unless ( ($timestamp = $sth->fetchrow) )
  92         {
  93             return HTTP::OAI::Response->new(
  94              requestURL  => $repository->self_url(),
  95              errors      => [ HTTP::OAI::Error->new(
  96                 code    => 'idDoesNotExist',
  97                 message => "There is no biblio record with this identifier",
  98                 ) ],
  99             );
 100         }
 101         $deleted = 1;
 102     }
 103
 104     my $oai_sets = GetOAISetsBiblio($biblionumber);
 105     my @setSpecs;
 106     foreach (@$oai_sets) {
 107         push @setSpecs, $_->{spec};
 108     }
 109
 110     if ($deleted) {
 111         $self->record(
 112             Koha::OAI::Server::DeletedRecord->new($timestamp, \@setSpecs, %args)
 113         );
 114     } else {
 115         # We fetch it using this method, rather than the database directly,
 116         # so it'll include the item data
 117         my $marcxml;
 118         $marcxml = $repository->get_biblio_marcxml($biblionumber, $args{metadataPrefix})
 119             unless $deleted;
 120
 121         $self->record(
 122             Koha::OAI::Server::Record->new($repository, $marcxml, $timestamp, \@setSpecs, %args)
 123         );
 124     }
 125     return $self;
 126 }
 127
 128 1;