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File:  [LON-CAPA] / loncom / interface / lonchatfetch.pm
Revision 1.18: download - view: text, annotated - select for diffs
Mon Jun 6 02:29:46 2005 UTC (19 years, 11 months ago) by albertel
Branches: MAIN
CVS tags: version_2_1_X, version_2_1_3, version_2_1_2, version_2_1_1, version_2_1_0, version_2_0_X, version_2_0_99_1, version_2_0_2, version_2_0_1, version_2_0_0, version_1_99_3, version_1_99_2, version_1_99_1, version_1_99_0, HEAD
- more bug#2667 fix up all of the other paces doing the blind \n to <br /> tranlation

# 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.'<head></head><body bgcolor="#FFFFFF">';
    }
    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.="<br />[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)/);
	    $newstuff.='<font color="#'.$color.'"><a name="'.$id.'"><b>'.
		$sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
		$contrib."</font><br>";
	    $bottomid=$id;
	} else {
	    $_=~/^(\w+)/;
	    if ($1 eq $env{'form.lastid'}) { $include=1; }
	}
    }
    my $participant_output=join('<br />',sort @participants);
    my $html=&Apache::lonxml::xmlbegin();
    $r->print(<<ENDDOCUMENT);
$html
<head>
<title>The LearningOnline Network with CAPA</title>
  <meta HTTP-EQUIV="Refresh" CONTENT="5; url=/adm/chatfetch?lastid=$lastid">
</head>
<body bgcolor="#FFFFFF">
<script>
parent.chatout.document.writeln('$newstuff');
parent.chatout.scroll(0,10000000);
</script>
$participant_output
</body>
</html>
ENDDOCUMENT
    return OK;
} 

1;
__END__
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