# The LearningOnline Network
# Cookie Based Access Handler
#
# $Id: publiccheck.pm,v 1.2 2006/04/13 19:07:33 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::publiccheck;

use strict;
use Apache::Constants qw(:common :http :methods);
use Apache::lonnet;
use Apache::loncommon();
use Apache::lonlocal;
use CGI::Cookie();
use Fcntl qw(:flock);
use Apache::lonacc();

sub handler {
    my $r = shift;
    my $requrl=$r->uri;
    my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
    my $lonid=$cookies{'lonID'};
    if ($lonid) {
	my $handle=$lonid->value;
        $handle=~s/\W//g;
        my $lonidsdir=$r->dir_config('lonIDsDir');
        if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
	    &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
	    if ($env{'user.name'} ne 'public'
		&& $env{'user.domain'} ne 'public') {
		return OK;
	    }
	}
    }
    if ($requrl=~m|^/public/|
	|| (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) {
        &Apache::lonnet::logthis('Granting public access: '.$requrl);
	if ($env{'user.name'} ne 'public' 
	    && $env{'user.domain'} ne 'public') {
	    my $cookie=
		&Apache::lonauth::success($r,'public','public','public');
	    my $lonidsdir=$r->dir_config('lonIDsDir');
	    &Apache::lonnet::transfer_profile_to_env($lonidsdir,$cookie);
	    $r->header_out('Set-cookie',"lonID=$cookie; path=/");
	}
	&Apache::lonacc::get_posted_cgi($r);
        $env{'request.state'} = "published";
        $env{'request.publicaccess'} = 1;
        $env{'request.filename'} = $r->filename;
        return OK;
    }
    return DECLINED;
}

1;

__END__