#!/usr/bin/perl

# Copyright 2009 BibLibre
#
# This file is part of Koha.
#
# Koha is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Koha is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Koha; if not, see <http://www.gnu.org/licenses>.

use Modern::Perl;

use CGI qw ( -utf8 );
use Encode qw( encode );

use C4::Auth qw( get_template_and_user );
use C4::Output qw( output_html_with_http_headers );
use C4::Record;
use C4::Ris qw( marc2ris );

use Koha::CsvProfiles;
use Koha::Biblios;

use utf8;
my $query = CGI->new;

my ( $template, $borrowernumber, $cookie ) = get_template_and_user (
    {
        template_name   => "basket/downloadcart.tt",
        query           => $query,
        type            => "intranet",
        flagsrequired   => { catalogue => 1 },
    }
);

my $bib_list = $query->param('bib_list');
my $format  = $query->param('format');
my $dbh     = C4::Context->dbh;

if ($bib_list && $format) {

    my @bibs = split( /\//, $bib_list );

    my $marcflavour         = C4::Context->preference('marcflavour');
    my $output;

    # CSV   
    if ($format =~ /^\d+$/) {

        $output = marc2csv(\@bibs, $format);
    
    # Other formats
    } else {

        foreach my $biblionumber (@bibs) {

            my $biblio = Koha::Biblios->find($biblionumber);
            my $record = $biblio->metadata->record({ embed_items => 1 });
            next unless $record;

            if ($format eq 'iso2709') {
                #NOTE: If we don't explicitly UTF-8 encode the output,
                #the browser will guess the encoding, and it won't always choose UTF-8.
                $output .= encode("UTF-8", $record->as_usmarc()) // q{};
            }
            elsif ($format eq 'ris') {
                $output .= marc2ris($record);
            }
            elsif ($format eq 'bibtex') {
                $output .= marc2bibtex($record, $biblionumber);
            }
        }
    }

    # If it was a CSV export we change the format after the export so the file extension is fine
    $format = "csv" if ($format =~ m/^\d+$/);

    print $query->header(
	-type => 'application/octet-stream',
	-'Content-Transfer-Encoding' => 'binary',
	-attachment=>"cart.$format");
    print $output;

} else { 
    $template->param(csv_profiles => Koha::CsvProfiles->search({ type => 'marc', used_for => 'export_records' }));
    $template->param(bib_list => $bib_list); 
    output_html_with_http_headers $query, $cookie, $template->output;
}