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# The LearningOnline Network
# Starts a user off based of an existing token.
#
# $Id: migrateuser.pm,v 1.5 2006/04/05 22:39:55 albertel 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/
#

package Apache::migrateuser;

use strict;
use Apache::Constants qw(:common :http :methods);
use Apache::lonauth;
use Apache::lonnet;

sub goto_login {
    my ($r) = @_;
    &Apache::loncommon::content_type($r,'text/html');
    $r->send_http_header;
    $r->print(&Apache::loncommon::start_page('Going to login',undef,
					     {'redirect' =>
						  [0,'/adm/login'],}).
	      '<h1>'.&mt('One moment please...').'</h1>'.
	      '<p>'.&mt('Transferring to login page.').'</p>'.
	      &Apache::loncommon::end_page());
    return OK;
}


sub handler {
    my ($r) = @_;
    
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['token']);
    my %data =   &Apache::lonnet::tmpget($env{'form.token'});
    my $delete = &Apache::lonnet::tmpdel($env{'form.token'});

    if ($delete ne 'ok') {
	return &goto_login($r);
    }

    if ($data{'ip'} ne $ENV{'REMOTE_ADDR'} || !defined($data{'username'}) ||
	!defined($data{'domain'}) ) {
	return &goto_login($r);
    }

    &Apache::lonnet::logthis("Allowing access for $data{'username'}\@$data{'domain'} to $data{'role'}");
    my $home=&Apache::lonnet::homeserver($data{'username'},$data{'domain'});
    if ($home =~ /(con_lost|no_such_host)/) { return &goto_login($r); }

    if (!$data{'role'}) {
	&Apache::lonauth::success($r,$data{'username'},$data{'domain'},
				  $home,'/adm/roles');
	return OK;
    }
    
    my $cookie=&Apache::lonauth::success($r,$data{'username'},$data{'domain'},
					 $home,'noredirect');
    $r->header_out('Set-cookie',"lonID=$cookie; path=/");
    &Apache::lonnet::transfer_profile_to_env($r->dir_config('lonIDsDir'),
					     $cookie);
    $env{'form.selectrole'}='1';
    $env{'form.'.$data{'role'}}='1';
    return &Apache::lonroles::handler($r);
}

1;
__END__