# The LearningOnline Network
# Unauthorized to access construction space
#
# $Id: lonunauthorized.pm,v 1.10 2011/06/07 18:05:08 www 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::lonunauthorized;

use strict;
use Apache::Constants qw(:common);
use Apache::loncommon;
use Apache::lonnet;
use Apache::loncacc;
use Apache::lonlocal;
use LONCAPA();

sub handler {
    my $r = shift;
    &Apache::loncommon::content_type($r,'text/html');
    $r->send_http_header;
    return OK if $r->header_only;

# ------------------------------------------------------------ Print the screen
# Figure out who the user is and what they wanted to access

    my ($ownername,$ownerdomain)=
     &Apache::loncacc::constructaccess($env{'request.editurl'},$r->dir_config('lonDefDomain'));
# print header
    $r->print(&Apache::loncommon::start_page("Failed Access to Construction Space",
					     undef,
					     {'domain' => $ownerdomain,}));
# figure out what went wrong

    if ($ownerdomain) {
	$r->print('<p class="LC_error">'
                 .&mt('The construction space for this resource is located on another server.')
                 .'</p>'
                 .'<p>'
                 .&mt('Choose another server.')
                 .'</p>');
        my $ownerhome=&Apache::lonnet::homeserver($ownername,$ownerdomain);
        unless ($ownerhome eq 'no_host') {
	    $r->print('<p>'
                     .&mt('Please log into [_1] to edit.'
                         ,'<tt>'.&Apache::lonnet::hostname($ownerhome).'</tt>')
                     .'</p>');
        }
    } elsif (!$env{'request.editurl'}) {
        $r->print('<p class="LC_error">'
                 .&mt('There may be a problem with the filename, e.g., you may be attempting to edit a versioned file (files in construction may not include a version number in front of the extension).')
                 .'</p>');
    } else {
        $r->print('<p class="LC_error">'
                 .&mt('You do not have authoring privileges for this resource')
                 .'</p>');
        my ($realownername)=
	    ($env{'request.editurl'}=~m{/(?:~|priv/|home/)($LONCAPA::username_re)});
        my $realownerhome=
	    &Apache::lonnet::homeserver($realownername,
					$r->dir_config('lonDefDomain'));
        unless ($realownerhome eq 'no_host') {
            my $plainname=&Apache::loncommon::plainname($realownername,$r->dir_config('lonDefDomain'));
            my $user=$realownername.':'.$r->dir_config('lonDefDomain');
            my $userlink=&Apache::loncommon::aboutmewrapper(
                             $plainname.' ('.$user.')'
                            ,$realownername
                            ,$r->dir_config('lonDefDomain'));
	    $r->print('<p>'
                     .&mt('Contact [_1] for access.',$userlink)
                     .'</p>');
        }
    }
    
    $r->print(&Apache::loncommon::end_page());
    return OK;
} 

1;
__END__