#!/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 2 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, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA  02111-1307 USA

use strict;
use warnings;

use CGI;
use Encode qw(encode);
use Switch;

use C4::Auth;
use C4::Biblio;
use C4::Items;
use C4::Output;
use C4::VirtualShelves;
use C4::Record;
use C4::Ris;
use C4::Csv;
use utf8;
my $query = new CGI;

my ( $template, $borrowernumber, $cookie ) = get_template_and_user (
    {
        template_name   => "opac-downloadshelf.tmpl",
        query           => $query,
        type            => "opac",
        authnotrequired => 1,
        flagsrequired   => { borrow => 1 },
    }
);

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

if ($shelfid && $format) {

    my @shelf               = GetShelf($shelfid);
    my ($items, $totitems)  = GetShelfContents($shelfid);
    my $marcflavour         = C4::Context->preference('marcflavour');
    my $output;

   # CSV 
    if ($format =~ /^\d+$/) {
        my @biblios;
        foreach (@$items) {
            push @biblios, $_->{biblionumber};
        }
        $output = marc2csv(\@biblios, $format);
            
    # Other formats
    } else {
	foreach my $biblio (@$items) {
	    my $biblionumber = $biblio->{biblionumber};

	    my $record = GetMarcBiblio($biblionumber);

	    switch ($format) {
		case "iso2709" { $output .= $record->as_usmarc(); }
		case "ris"     { $output .= marc2ris($record); }
		case "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 $query->header(
	-type => 'application/octet-stream',
	-'Content-Transfer-Encoding' => 'binary',
	-attachment=>"shelf.$format");
    print $output;

} else {
    $template->param(csv_profiles => GetCsvProfilesLoop());
    $template->param(shelfid => $shelfid); 
    output_html_with_http_headers $query, $cookie, $template->output;
}