#!/usr/bin/perl

# Copyright 2009 SARL 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;
use Carp qw( carp );
use Try::Tiny qw( catch try );

use C4::Auth qw( get_template_and_user );
use C4::Biblio qw(
  GetFrameworkCode
  GetMarcISBN
  GetMarcSubjects
);
use C4::Output qw( output_html_with_http_headers );
use Koha::Biblios;
use Koha::Email;
use Koha::Patrons;
use Koha::Virtualshelves;

my $query = CGI->new;

# if virtualshelves is disabled, leave immediately
if ( !C4::Context->preference('virtualshelves') ) {
    print $query->redirect("/cgi-bin/koha/errors/404.pl");
    exit;
}

my ( $template, $borrowernumber, $cookie ) = get_template_and_user(
    {
        template_name => "opac-sendshelfform.tt",
        query         => $query,
        type          => "opac",
    }
);

my $shelfid = $query->param('shelfid');
my $email   = $query->param('email');

my $shelf = Koha::Virtualshelves->find($shelfid);
if ( $shelf and $shelf->can_be_viewed($borrowernumber) ) {
    if ($email) {
        my $comment = $query->param('comment');

        my $patron     = Koha::Patrons->find($borrowernumber);
        my $user_email = $patron->notice_email_address;
        my $shelf      = Koha::Virtualshelves->find($shelfid);
        my $contents   = $shelf->get_contents;
        my $iso2709;

        my @biblionumbers;
        while ( my $content = $contents->next ) {
            push @biblionumbers, $content->biblionumber;
            my $biblio = Koha::Biblios->find( $content->biblionumber );
            $iso2709 .= $biblio->metadata->record->as_usmarc();
        }

        if ( !defined $iso2709 ) {
            carp "Error sending mail: empty list";
            $template->param( error => 1 );
        }
        elsif ( !defined $user_email or $user_email eq '' ) {
            carp "Error sending mail: sender's email address is invalid";
            $template->param( error => 1 );
        }
        else {
            my %loops = ( biblio => \@biblionumbers, );

            my %substitute = (
                comment  => $comment,
                listname => $shelf->shelfname,
            );

            my $letter = C4::Letters::GetPreparedLetter(
                module      => 'catalogue',
                letter_code => 'LIST',
                lang        => $patron->lang,
                tables      => {
                    borrowers => $borrowernumber,
                },
                message_transport_type => 'email',
                loops                  => \%loops,
                substitute             => \%substitute,
            );

            my $attachment = {
                filename => 'list.iso2709',
                type     => 'application/octet-stream',
                content  => Encode::encode( "UTF-8", $iso2709 ),
            };

            my $message_id = C4::Letters::EnqueueLetter(
                {
                    letter                 => $letter,
                    message_transport_type => 'email',
                    borrowernumber         => $patron->borrowernumber,
                    to_address             => $email,
                    reply_address          => $user_email,
                    attachments            => [$attachment],
                }
            );

            C4::Letters::SendQueuedMessages( { message_id => $message_id } ) if $message_id;

            $template->param( SENT => 1 );
        }

        $template->param(
            shelfid => $shelfid,
            email   => $email,
        );
        output_html_with_http_headers $query, $cookie, $template->output,
          undef, { force_no_caching => 1 };

    }
    else {
        $template->param(
            shelfid => $shelfid,
            url     => "/cgi-bin/koha/opac-sendshelf.pl",
        );
        output_html_with_http_headers $query, $cookie, $template->output,
          undef, { force_no_caching => 1 };
    }
}
else {
    $template->param(
        invalidlist => 1,
        url         => "/cgi-bin/koha/opac-sendshelf.pl",
    );
    output_html_with_http_headers $query, $cookie, $template->output, undef,
      { force_no_caching => 1 };
}