# The LearningOnline Network
# Login Screen
#
# $Id: lonlogin.pm,v 1.4 2009/10/03 01:41:27 gci 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::lonlogin;
use strict;
use Apache::Constants qw(:common);
use Apache::File ();
use Apache::lonnet;
use Apache::loncommon();
use Apache::lonauth();
use Apache::lonlocal;
use Apache::migrateuser();
use lib '/home/httpd/lib/perl/';
use LONCAPA;
sub handler {
my $r = shift;
&Apache::loncommon::get_unprocessed_cgi
(join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
$ENV{'REDIRECT_QUERY_STRING'}),
['interface','username','domain','firsturl','localpath','localres',
'token','role','symb']);
if (!defined($env{'form.firsturl'})) {
&Apache::lonacc::get_posted_cgi($r,['firsturl']);
}
# -- check if they are a migrating user
if (defined($env{'form.token'})) {
return &Apache::migrateuser::handler($r);
}
&Apache::loncommon::no_cache($r);
&Apache::lonlocal::get_language_handle($r);
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
return OK if $r->header_only;
# Are we re-routing?
if (-e '/home/httpd/html/lon-status/reroute.txt') {
&Apache::lonauth::reroute($r);
return OK;
}
# -------------------------------- Prevent users from attempting to login twice
my $handle = &Apache::lonnet::check_for_valid_session($r);
if ($handle=~/^publicuser\_/) {
# For "public user" - remove it, we apparently really want to login
unlink($r->dir_config('lonIDsDir')."/$handle.id");
} elsif ($handle ne '') {
# Indeed, a valid token is found
my $start_page =
&Apache::loncommon::start_page('Already logged in');
my $end_page =
&Apache::loncommon::end_page();
my $dest = '/adm/roles';
if ($env{'form.firsturl'} ne '') {
$dest = $env{'form.firsturl'};
}
$r->print(
$start_page
.'
'.&mt('You are already logged in!').'
'
.'
'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
'','','','').'
'.&mt("The $sitename server is temporarily not available for login.").'
'
.''
.''
);
return OK;
}
# ----------------------------------------------- Apparently we are in business
$servadm=~s/\,/\ /g;
# ----------------------------------------------------------- Front page design
my $pgbg=
($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF');
my $font=
($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000');
my $link=
($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF');
my $vlink=
($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF');
my $alink=&Apache::loncommon::designparm('login.alink',$domain);
my $mainbg=
($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF');
my $sidebg=
($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF');
my $textcol =
($fullgraph?&Apache::loncommon::designparm('login.textcol',$domain):'#000000');
my $bgcol =
($fullgraph?&Apache::loncommon::designparm('login.bgcol',$domain):'#FFFFFF');
my $logo=&Apache::loncommon::designparm('login.logo',$domain);
my $img=&Apache::loncommon::designparm('login.img',$domain);
my $domainlogo=&Apache::loncommon::domainlogo($domain);
my $login=&Apache::loncommon::designparm('login.login',$domain);
if ($login eq '') {
$login = $iconpath.'/'.&mt('userauthentication.gif');
}
my $showbanner = 1;
my $showmainlogo = 1;
if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
$showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
}
if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
$showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
}
my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
my $showcoursecat =
&Apache::loncommon::designparm('login.coursecatalog',$domain);
my $loginheader =&Apache::loncommon::designparm('login.loginheader',$domain);
my $shownewuserlink =
&Apache::loncommon::designparm('login.newuser',$domain);
my $now=time;
my $js = (<
//
ENDSCRIPT
# --------------------------------------------------- Print login screen header
my %add_entries = (topmargin => "0",
leftmargin => "0",
marginheight => "0",
marginwidth => "0",
bgcolor => "$pgbg",
text => "$font",
link => "$link",
vlink => "$vlink",
alink => "$alink",
onload => "if ( document.client.uname ) { document.client.uname.focus(); }",
marginheight => "0",);
my $css_url = "/css/$domain/login.css";
$js .= "\n".''."\n";
$r->print(&Apache::loncommon::start_page('GCI WebCenter Login',$js,
{ 'redirect' => [$expire,'/adm/roles'],
'add_entries' => \%add_entries,
'only_body' => 1,}));
# ----------------------------------------------------------------------- Texts
my %lt=&Apache::lonlocal::texthash(
'un' => 'Username',
'pw' => 'Password',
'dom' => 'Domain',
'load' => 'Server Load',
'userload' => 'User Load',
'about' => 'About LON-CAPA',
'access' => 'Accessibility Options',
'catalog' => 'Course Catalog',
'log' => 'Log in',
'help' => 'Log-in Help',
'serv' => 'Server',
'servadm' => 'Server Administration',
'helpdesk' => 'Contact Helpdesk',
'forgotpw' => 'Forgot password?',
'newuser' => 'New User?',
'options_headline' => 'Select Accessibility Options',
'sprs_img' => 'Suppress rendering of images',
'sprs_applet' => 'Suppress Java applets',
'sprs_embed' => 'Suppress rendering of embedded multimedia',
'sprs_font' => 'Increase font size',
'sprs_blackwhite' => 'Switch to black and white mode',
'remember' => 'Remember these settings for next login',
'tbli' => 'Text-based Interface Login');
# -------------------------------------------------- Change password field name
my $forgotpw = &forgotpwdisplay(%lt);
my $loginhelp = &loginhelpdisplay(%lt);
# ---------------------------------------------------- Serve out DES JavaScript
{
my $jsh=Apache::File->new($include."/londes.js");
$r->print(<$jsh>);
}
# ---------------------------------------------------------- Serve rest of page
my $coursecatalog;
if (($showcoursecat eq '') || ($showcoursecat)) {
$coursecatalog = &coursecatalog_link($lt{'catalog'},$fullgraph);
}
my $newuserlink;
if ($shownewuserlink) {
$newuserlink = &newuser_link($lt{'newuser'});
}
if ($fullgraph) {
$r->print(<<"END_OF_BLOCK1");
New to the $sitename?
$sitedesc
The $shortsitename runs on LON-CAPA - an open source freeware distributed learning content management and assessment system.
END_OF_BLOCK1
if ($domain eq 'gci') {
$r->print(<<"END_OF_BLOCK2");
Create a GCI WebCenter ID use your ID to submit comments or new content, or to create a new test. If you are already a GCI WebCenter user, please log-in.
END_OF_BLOCK2
} else {
$r->print(''.
&mt("If you are already a $sitename user, please log-in.").' '.&mt('If not, contact your instructor to request a username and password.').
'
');
}
$r->print(<<"END_OF_BLOCK3");
Note:
If log-in fails, it may be because your browser is not accepting session cookies, or javascript is disabled. Learn more.
END_OF_BLOCK3
} else {
$r->print(<The LearningOnline Network with CAPA
$lt{'tbli'}
$announcements
$lt{'options_headline'}
ENDLOGIN
if ($fullgraph) {
my $helpdeskscript;
my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
$version,$authdomain,\$helpdeskscript);
}
my %endargs = ( 'noredirectlink' => 1, );
$r->print(&Apache::loncommon::end_page(\%endargs));
return OK;
}
sub contactdisplay {
my ($lt,$servadm,$showadminmail,$version,$authdomain,$helpdeskscript) = @_;
my $contactblock;
my $showhelpdesk = 0;
my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {
$showhelpdesk = 1;
}
if ($servadm && $showadminmail) {
$contactblock .= ' '.$$lt{'servadm'}.': '.
' '.$servadm.'
';
}
if ($showhelpdesk) {
$contactblock .= ''.$lt->{'helpdesk'}.' ';
my $thisurl = &escape('/adm/login');
$$helpdeskscript = <<"ENDSCRIPT";
ENDSCRIPT
}
$contactblock .= <<"ENDBLOCK";
$version
ENDBLOCK
return $contactblock;
}
sub forgotpwdisplay {
my (%lt) = @_;
my $prompt_for_resetpw = 1;
if ($prompt_for_resetpw) {
return ' '.$lt{'forgotpw'}.' ';
}
return;
}
sub loginhelpdisplay {
my (%lt) = @_;
my $login_help = 1;
if ($login_help) {
return ' '.$lt{'help'}.'';
}
return;
}
sub coursecatalog_link {
my ($linkname,$fullgraph) = @_;
my $link = '/adm/coursecatalog';
if (!$fullgraph) {
$link.= '?interface=textual';
}
return ' '.$linkname.' ';
END
}
sub newuser_link {
my ($linkname) = @_;
return ' '.$linkname.' ';
}
1;
__END__