#!/usr/bin/perl
# CGI-script to allow download of all essay submissions of 
# multiple students.
#
# $Id: multidownload.pl,v 1.4 2007/04/25 00:32:49 banghart Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA 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.
#
# LON-CAPA 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 LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#

use lib '/home/httpd/lib/perl';
use LONCAPA::loncgi;
use File::Path;
use File::Basename;
use File::Copy;
use IO::File;
use Image::Magick;
use Apache::lonhtmlcommon();
use Apache::lonnet;
use Apache::grades;
use Apache::loncommon();
use Apache::lonlocal;
use Apache::lonmsg();
use Apache::lonnet;
use LONCAPA::Enrollment;
use strict;

sub is_student {
    return ($env{'request.role'}=~/^st\./);
}

$|=1;
if (! &LONCAPA::loncgi::check_cookie_and_load_env()) {
    print <<END;
Content-type: text/html

<html>
<head><title>Bad Cookie</title></head>
<body>
Your cookie information is incorrect.
</body>
</html>
END
    return;
}
&Apache::lonlocal::get_language_handle();
&Apache::loncommon::content_type(undef,'text/html');
my $identifier = $ENV{'QUERY_STRING'};
print(&Apache::loncommon::start_page('Multiple Downloads'));
$env{'request.role'} =~ m/^(.+)\./;
my $role = $1;
if ($role eq 'cc') {
    my $symb = $env{'cgi.'.$identifier.'.symb'};
    my $courseid = $env{'request.course.id'};
    my @stuchecked = split(/\n/,$env{'cgi.'.$identifier.'.students'});
    my @parts = split(/\n/,$env{'cgi.'.$identifier.'.parts'});
    my ($partlist,$handgrade,$responseType) = &Apache::grades::response_type($symb);
    my @part_response_id = &Apache::grades::flatten_responseType($responseType);
    my $doc_zip_root = $Apache::lonnet::perlvar{'lonZipDir'};
    my ($partlist,$handgrade,$responseType) = &Apache::grades::response_type($symb);
    mkdir($doc_zip_root."/zipdir",0777);
    foreach my $stu (@stuchecked) {
        my ($uname,$udom,$fullname) = split(/:/,$stu);
        mkdir($doc_zip_root."/zipdir/$uname",0777);
        my %record = &Apache::lonnet::restore($symb,$courseid,$udom,$uname);
        foreach my $part (@part_response_id) {
            my ($partid,$respid) = @{$part};
            mkdir($doc_zip_root."/zipdir/$uname/part$partid",0777);
            mkdir($doc_zip_root."/zipdir/$uname/part$partid/resp$respid",0777);
            my $files = &Apache::grades::get_submitted_files($udom,$uname,$partid,$respid,\%record);
            foreach my $file (@$files) {
                $file =~ /(^.*\/)(.+$)/;
                my $file_name_only = $2;
                my $file_content = &Apache::lonnet::getfile($file);
                if (open(my $fh,">$doc_zip_root/zipdir/$uname/part$partid/resp$respid/$file_name_only")) {
                    print($fh $file_content);
                    close($fh);
                } else {
                    print("problem creating file <br />");
                }
            }
        }
    }
    mkdir($doc_zip_root."/zipout",0777);
    my $statement = "zip -r $doc_zip_root/zipout/output.zip $doc_zip_root/zipdir/* > /dev/null";
    system($statement);
    $statement = "rm -rf $doc_zip_root/zipdir";
    system($statement);
    print('<a href="../zipout/output.zip">Click to download</a><br />');
} else {
    print('You are not authorized to download student submissions.');
}
# print($env{'request.role'}.' == roles <br />');
return 1;
