Koha/OAI/Server/Identify.pm

   1 # Copyright Tamil s.a.r.l. 2008-2015
   2 # Copyright Biblibre 2008-2015
   3 # Copyright The National Library of Finland, University of Helsinki 2016-2017
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  19
  20 package Koha::OAI::Server::Identify;
  21
  22 use Modern::Perl;
  23 use HTTP::OAI;
  24 use C4::Context;
  25
  26 use base ("HTTP::OAI::Identify");
  27
  28 sub new {
  29     my ($class, $repository) = @_;
  30
  31     my ($baseURL) = $repository->self_url() =~ /(.*)\?.*/;
  32     my $self = $class->SUPER::new(
  33         baseURL             => $baseURL,
  34         repositoryName      => C4::Context->preference("LibraryName"),
  35         adminEmail          => C4::Context->preference("KohaAdminEmailAddress"),
  36         MaxCount            => C4::Context->preference("OAI-PMH:MaxCount"),
  37         granularity         => 'YYYY-MM-DDThh:mm:ssZ',
  38         earliestDatestamp   => _get_earliest_datestamp() || '0001-01-01T00:00:00Z',
  39         deletedRecord       => C4::Context->preference("OAI-PMH:DeletedRecord") || 'no',
  40     );
  41
  42     # FIXME - alas, the description element is not so simple; to validate
  43     # against the OAI-PMH schema, it cannot contain just a string,
  44     # but one or more elements that validate against another XML schema.
  45     # For now, simply omitting it.
  46     # $self->description( "Koha OAI Repository" );
  47
  48     $self->compression( 'gzip' );
  49
  50     return $self;
  51 }
  52
  53 # Find the earliest timestamp in the biblio table. If this table is empty, undef
  54 # will be returned and we will report the fallback 0001-01-01.
  55 sub _get_earliest_datestamp {
  56     my $dbh = C4::Context->dbh;
  57     my ( $earliest ) = $dbh->selectrow_array("SELECT MIN(timestamp) AS earliest FROM biblio" );
  58     return $earliest
  59 }
  60
  61 1;