# The LearningOnline Network
# Chat Fetching
#
# $Id: lonchatfetch.pm,v 1.18 2005/06/06 02:29:46 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::lonchatfetch;
use strict;
use Apache::Constants qw(:common :http);
use Apache::lontexconvert;
use Apache::loncommon;
use Apache::lonnet;
sub handler {
my $r = shift;
if (! &Apache::lonnet::allowed('pch',$env{'request.course.id'}.
($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
) {
return HTTP_NOT_ACCEPTABLE;
}
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 $loaderror; }
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
return OK if $r->header_only;
# ------------------------------------------------------------ retrieve entries
my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
my @entries=split(/\:/,
&Apache::lonnet::reply(
"chatretr:$cdom:$cnum:$env{'user.domain'}:$env{'user.name'}",$chome));
# Figure out what the last valid entry-id is
my ($lastid,$thentime,$idnum);
foreach (@entries) {
$_=~/^(\w+)/;
if ($1 ne 'active_participant') {
$lastid=$1;
($thentime,$idnum)=split(/\_/,$lastid);
}
}
# ----------------------------------------------------------- Can see identity?
my $crs='/'.$env{'request.course.id'};
if ($env{'request.course.sec'}) {
$crs.='_'.$env{'request.course.sec'};
}
$crs=~s/\_/\//g;
my $seeid=&Apache::lonnet::allowed('rin',$crs);
# -------------------------------------------------------- see which ones apply
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['lastid']);
my $include=0;
my $newstuff='';
my $bottomid='';
unless ($env{'form.lastid'}) {
$include=1;
my $html=&Apache::lonxml::xmlbegin();
$newstuff=$html.'';
}
my @participants=();
foreach (@entries) {
my ($id,$msg,$udom)=split(/\:/,&Apache::lonnet::unescape($_));
if ($id eq 'active_participant') {
chomp($udom);
my $participant= &Apache::loncommon::nickname($msg,$udom);
unless ($participant=~/\w/) { $participant=$msg.'@'.$udom; }
$participants[$#participants+1]=$participant;
} elsif ($include) {
chomp($msg);
my ($msgtime,$msgnum)=split(/\_/,$id);
my ($sdom,$snum,$anon,$contrib)=split(/\:/,
&Apache::lonnet::unescape($msg));
$contrib=&Apache::lonnet::unescape($contrib);
&Apache::lonfeedback::newline_to_br(\$contrib);
($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
if ($errors) { $contrib.="[Message not fully displayed due to incorrect embedded TeX]"; }
if ($errors && $snum eq $env{'user.name'} &&
$sdom eq $env{'user.domain'} ) {
$contrib.="
[TeX error message: $errors]";
}
$contrib=~s/\n/ /g;
$contrib=~s/\'/\&\#39\;/g;
my $sender='';
if ($seeid) {
$sender=&Apache::loncommon::plainname($snum,$sdom);
my $nick=&Apache::loncommon::nickname($snum,$sdom);
if (($nick) && ($nick ne $sender)) {
$sender.=' '.$nick;
}
unless ($sender) { $sender=$snum.'@'.$sdom; }
if ($anon) { $sender.=' [Anon]' };
} elsif (!$anon) {
$sender=&Apache::loncommon::nickname($snum,$sdom);
unless ($sender) { $sender=$snum.'@'.$sdom; }
} else {
$sender=&Apache::loncommon::screenname($snum,$sdom);
unless ($sender) { $sender="Anonymous"; }
}
$sender=~s/\'/\&\#39\;/g;
my $color=$sender;
$color=~tr/a-j/0-9/;
$color=~tr/A-J/0-9/;
$color=~tr/k-t/0-9/;
$color=~tr/K-T/0-9/;
$color=~tr/u-z/0-5/;
$color=~tr/U-Z/0-5/;
$color=~s/\D//g;
$color=substr($color,0,6);
my $timestamp=localtime($msgtime);
my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/);
$newstuff.=''.
$sender.' ('.$mhour.':'.$mmin.':'.$msec.'): '.
$contrib."
";
$bottomid=$id;
} else {
$_=~/^(\w+)/;
if ($1 eq $env{'form.lastid'}) { $include=1; }
}
}
my $participant_output=join('
',sort @participants);
my $html=&Apache::lonxml::xmlbegin();
$r->print(<
The LearningOnline Network with CAPA
$participant_output