Annotation of loncom/interface/lonchatfetch.pm, revision 1.15

1.1       www         1: # The LearningOnline Network
                      2: # Chat Fetching
                      3: #
1.15    ! albertel    4: # $Id: lonchatfetch.pm,v 1.14 2004/06/27 17:36:57 www Exp $
1.1       www         5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
                     28: 
                     29: package Apache::lonchatfetch;
                     30: 
                     31: use strict;
1.12      matthew    32: use Apache::Constants qw(:common :http);
1.1       www        33: use Apache::lontexconvert;
1.4       www        34: use Apache::loncommon;
                     35: use Apache::lonnet;
1.1       www        36: 
                     37: sub handler {
                     38:     my $r = shift;
1.12      matthew    39: 
                     40:     if (! &Apache::lonnet::allowed('pch',$ENV{'request.course.id'}.
                     41:              ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))
                     42:         ) {
                     43:         return HTTP_NOT_ACCEPTABLE;
                     44:     }
1.6       www        45: 
                     46:     my $loaderror=&Apache::lonnet::overloaderror($r);
                     47:     if ($loaderror) { return $loaderror; }
                     48:     $loaderror=
                     49:        &Apache::lonnet::overloaderror($r,
                     50:          $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
                     51:     if ($loaderror) { return $loaderror; }
                     52: 
1.1       www        53:     $r->content_type('text/html');
                     54:     $r->send_http_header;
                     55:     return OK if $r->header_only;
                     56: 
                     57: # ------------------------------------------------------------ retrieve entries
                     58: 
                     59:     my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
                     60:     my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
                     61:     my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.4       www        62: 
1.1       www        63:     my @entries=split(/\:/,
1.8       www        64:        &Apache::lonnet::reply(
                     65:         "chatretr:$cdom:$cnum:$ENV{'user.domain'}:$ENV{'user.name'}",$chome));
1.10      www        66: # Figure out what the last valid entry-id is
                     67:     my ($lastid,$thentime,$idnum);
                     68:     foreach (@entries) {
                     69: 	$_=~/^(\w+)/;
                     70:         if ($1 ne 'active_participant') {
                     71: 	    $lastid=$1;
                     72:             ($thentime,$idnum)=split(/\_/,$lastid);
                     73: 	}
                     74:     }
1.4       www        75: # ----------------------------------------------------------- Can see identity?
                     76:     my $crs='/'.$ENV{'request.course.id'};
                     77:     if ($ENV{'request.course.sec'}) {
                     78:        $crs.='_'.$ENV{'request.course.sec'};
                     79:     }                 
                     80:     $crs=~s/\_/\//g;
                     81:     my $seeid=&Apache::lonnet::allowed('rin',$crs);
1.1       www        82: # -------------------------------------------------------- see which ones apply
                     83:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['lastid']);
                     84:     my $include=0;
                     85:     my $newstuff='';
1.3       www        86:     my $bottomid='';
1.2       www        87:     unless ($ENV{'form.lastid'}) { 
                     88:        $include=1; 
1.15    ! albertel   89:        my $html=&Apache::lonxml::xmlbegin();
        !            90:        $newstuff=$html.'<head></head><body bgcolor="#FFFFFF">';
1.2       www        91:     }
1.9       www        92:     my @participants=();
1.1       www        93:     foreach (@entries) {
1.9       www        94: 	my ($id,$msg,$udom)=split(/\:/,&Apache::lonnet::unescape($_));
                     95:  	if ($id eq 'active_participant') {
                     96:            chomp($udom);
1.14      www        97: 	   my $participant= &Apache::loncommon::nickname($msg,$udom);
                     98: 	   unless ($participant=~/\w/) { $participant=$msg.'@'.$udom; }
                     99: 	   $participants[$#participants+1]=$participant;
1.9       www       100: 	} elsif ($include) {
                    101: 	    chomp($msg);
                    102: 	    my ($msgtime,$msgnum)=split(/\_/,$id);
                    103: 	    my ($sdom,$snum,$anon,$contrib)=split(/\:/,
                    104: 					     &Apache::lonnet::unescape($msg));
                    105: 	    $contrib=&Apache::lonnet::unescape($contrib);
                    106: 	    $contrib=~s/\n/\<br \/\>/g;
1.11      albertel  107: 	    ($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
                    108: 	    if ($errors) { $contrib.="[Message not fully displayed due to incorrect embedded TeX]"; }
                    109: 	    if ($errors && $snum eq $ENV{'user.name'} &&
                    110: 		$sdom eq $ENV{'user.domain'} ) {
                    111: 		$contrib.="<br />[TeX error message: $errors]";
                    112: 	    }
1.9       www       113: 	    $contrib=~s/\n/ /g;
                    114: 	    $contrib=~s/\'/\&\#39\;/g;
                    115: 	    my $sender='';
                    116: 	    if ($seeid) {
                    117: 		$sender=&Apache::loncommon::plainname($snum,$sdom);
                    118: 		my $nick=&Apache::loncommon::nickname($snum,$sdom);
                    119: 		if (($nick) && ($nick ne $sender)) {
                    120: 		    $sender.=' '.$nick;
                    121: 		}
1.14      www       122: 		unless ($sender) { $sender=$snum.'@'.$sdom; }
1.9       www       123: 		if ($anon) { $sender.=' [Anon]' };
                    124: 	    } elsif (!$anon) {
                    125: 		$sender=&Apache::loncommon::nickname($snum,$sdom);
1.14      www       126: 		unless ($sender) { $sender=$snum.'@'.$sdom; }
1.7       www       127: 	    } else {
1.9       www       128: 		$sender=&Apache::loncommon::screenname($snum,$sdom);
                    129: 		unless ($sender) { $sender="Anonymous"; }
1.7       www       130: 	    }
1.13      www       131: 	    $sender=~s/\'/\&\#39\;/g;
1.9       www       132: 	    my $color=$sender;
                    133: 	    $color=~tr/a-j/0-9/;
                    134: 	    $color=~tr/A-J/0-9/;
                    135: 	    $color=~tr/k-t/0-9/;
                    136: 	    $color=~tr/K-T/0-9/;
                    137: 	    $color=~tr/u-z/0-5/;
                    138: 	    $color=~tr/U-Z/0-5/;
                    139: 	    $color=~s/\D//g;
                    140: 	    $color=substr($color,0,6);
                    141: 	    my $timestamp=localtime($msgtime);
                    142: 	    my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/);
                    143: 	    $newstuff.='<font color="#'.$color.'"><a name="'.$id.'"><b>'.
                    144: 		$sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
                    145: 		$contrib."</font><br>";
                    146: 	    $bottomid=$id;
                    147: 	} else {
                    148: 	    $_=~/^(\w+)/;
                    149: 	    if ($1 eq $ENV{'form.lastid'}) { $include=1; }
                    150: 	}
1.1       www       151:     }
1.9       www       152:     my $participant_output=join('<br />',sort @participants);
1.15    ! albertel  153:     my $html=&Apache::lonxml::xmlbegin();
1.1       www       154:     $r->print(<<ENDDOCUMENT);
1.15    ! albertel  155: $html
1.1       www       156: <head>
                    157: <title>The LearningOnline Network with CAPA</title>
                    158:   <meta HTTP-EQUIV="Refresh" CONTENT="5; url=/adm/chatfetch?lastid=$lastid">
                    159: </head>
                    160: <body bgcolor="#FFFFFF">
                    161: <script>
                    162: parent.chatout.document.writeln('$newstuff');
1.3       www       163: parent.chatout.scroll(0,10000000);
1.1       www       164: </script>
1.9       www       165: $participant_output
1.1       www       166: </body>
                    167: </html>
                    168: ENDDOCUMENT
                    169:     return OK;
                    170: } 
                    171: 
                    172: 1;
                    173: __END__

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