'.&mt('View student activity').'

# The LearningOnline Network with CAPA
#
# $Id: lontrackstudent.pm,v 1.1 2004/08/11 18:41:05 matthew 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/
#
###

=pod

=head1 NAME

lontrackstudent

=head1 SYNOPSIS

Track student progress through course materials

=over 4

=cut

package Apache::lontrackstudent;

use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet();
use Apache::lonlocal;
use Time::HiRes;

###################################################################
###################################################################
sub get_all_data {}
sub get_student_data {}
sub html_output_student_data {}
sub html_output_class_data {}

sub request_data_update {
    my $command = 'prepare activity log';
    my $cid = $ENV{'request.course.id'};
    my $domain = $ENV{'course.'.$cid.'.domain'};
    my $home = $ENV{'course.'.$cid.'.home'};
    my $course = $ENV{'course.'.$cid.'.num'};
    &Apache::lonnet::logthis($command.' '.$course.' '.$domain.' '.$home);
    my $result = &Apache::lonnet::metadata_query($command,$course,$domain,
                                                 [$home]);
    return $result;
}

###################################################################
###################################################################


###################################################################
###################################################################
sub handler {
    my $r=shift;
    my $c = $r->connection();
    #
    # Check for overloading here and on the course home server
    my $loaderror=&Apache::lonnet::overloaderror($r);
    if ($loaderror) { return $loaderror; }
    $loaderror=
        &Apache::lonnet::overloaderror
        ($r,
         $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
    if ($loaderror) { return $loaderror; }
    #
    # Check for access
    if (! &Apache::lonnet::allowed('vsa',$ENV{'request.course.id'})) {
        $ENV{'user.error.msg'}=
            $r->uri.":vsa:0:0:Cannot student activity for complete course";
        if (! 
            &Apache::lonnet::allowed('vsa',
                                     $ENV{'request.course.id'}.'/'.
                                     $ENV{'request.course.sec'})) {
            $ENV{'user.error.msg'}=
                $r->uri.":vsa:0:0:Cannot view student activity with given role";
            return HTTP_NOT_ACCEPTABLE;
        }
    }
    #
    # Send the header
    &Apache::loncommon::no_cache($r);
    &Apache::loncommon::content_type($r,'text/html');
    $r->send_http_header;
    if ($r->header_only) { return OK; }
    #
    # Extract form elements from query string
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                                            ['selected_student']);
    #
    # Give the LON-CAPA page header
    $r->print('<html><head><title>'.
              &mt('Student Activity').
              "</title></head>\n".
              &Apache::loncommon::bodytag('Student Activity'));
    $r->rflush();
    # 
    # Either print out a menu for them or send them to a report
    &Apache::lonhtmlcommon::clear_breadcrumbs();
    &Apache::lonhtmlcommon::add_breadcrumb({href=>'/adm/studentactivity',
                                            title=>'Student Activity',
                                            text =>'Student Activity',
                                            faq=>139,
                                            bug=>'instructor interface'});
    #
    # Begin form output
    $r->print('<form name="Statistics" ');
    $r->print('method="post" action="/adm/statistics">');
    $r->rflush();
    $r->print('<h1>'.&mt('View student activity').'</h1>');
    #
    my $result = &request_data_update();
    if (ref($result) eq 'HASH') {
        $result = join(map { $_.'=>'.$result->{$_}; } keys(%$result));
    }
    $r->print('<h2>'.$result.'</h2>');
    #
    if (! exists($ENV{'form.selected_student'})) {
        # Choose a student
        $r->print('If you worked here you would be done by now');
    } else {
        # Show a students activity
        $r->print('I would like to have something to show you but I do not.');
    }
    #
    $r->print("</form>\n");
    $r->print("</body>\n</html>\n");
    $r->rflush();
    #
    return OK;
}

1;

#######################################################
#######################################################

=pod

=back

=cut

#######################################################
#######################################################

__END__