loncom/interface/lonchatfetch.pm - view

File: [LON-CAPA] / loncom / interface / lonchatfetch.pm
Revision 1.11: download - view: text, annotated - select for diffs
Mon Jun 23 21:30:42 2003 UTC (21 years ago) by albertel
Branches: MAIN
CVS tags: version_0_99_3, HEAD

- BUG# 1779, if TeX throws errors in chat mode show a generic error message to all, show the tTex error messages to the person who wrote it.

1: # The LearningOnline Network 2: # Chat Fetching 3: # 4: # $Id: lonchatfetch.pm,v 1.11 2003/06/23 21:30:42 albertel Exp $ 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; 32: use Apache::Constants qw(:common); 33: use Apache::lontexconvert; 34: use Apache::loncommon; 35: use Apache::lonnet; 36: 37: sub handler { 38: my $r = shift; 39: 40: my $loaderror=&Apache::lonnet::overloaderror($r); 41: if ($loaderror) { return $loaderror; } 42: $loaderror= 43: &Apache::lonnet::overloaderror($r, 44: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}); 45: if ($loaderror) { return $loaderror; } 46: 47: $r->content_type('text/html'); 48: $r->send_http_header; 49: return OK if $r->header_only; 50: 51: # ------------------------------------------------------------ retrieve entries 52: 53: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'}; 54: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}; 55: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'}; 56: 57: my @entries=split(/\:/, 58: &Apache::lonnet::reply( 59: "chatretr:$cdom:$cnum:$ENV{'user.domain'}:$ENV{'user.name'}",$chome)); 60: # Figure out what the last valid entry-id is 61: my ($lastid,$thentime,$idnum); 62: foreach (@entries) { 63: $_=~/^(\w+)/; 64: if ($1 ne 'active_participant') { 65: $lastid=$1; 66: ($thentime,$idnum)=split(/\_/,$lastid); 67: } 68: } 69: # ----------------------------------------------------------- Can see identity? 70: my $crs='/'.$ENV{'request.course.id'}; 71: if ($ENV{'request.course.sec'}) { 72: $crs.='_'.$ENV{'request.course.sec'}; 73: } 74: $crs=~s/\_/\//g; 75: my $seeid=&Apache::lonnet::allowed('rin',$crs); 76: # -------------------------------------------------------- see which ones apply 77: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['lastid']); 78: my $include=0; 79: my $newstuff=''; 80: my $bottomid=''; 81: unless ($ENV{'form.lastid'}) { 82: $include=1; 83: $newstuff='<html><body bgcolor="#FFFFFF">'; 84: } 85: my @participants=(); 86: foreach (@entries) { 87: my ($id,$msg,$udom)=split(/\:/,&Apache::lonnet::unescape($_)); 88: if ($id eq 'active_participant') { 89: chomp($udom); 90: $participants[$#participants+1]= 91: &Apache::loncommon::nickname($msg,$udom); 92: } elsif ($include) { 93: chomp($msg); 94: my ($msgtime,$msgnum)=split(/\_/,$id); 95: my ($sdom,$snum,$anon,$contrib)=split(/\:/, 96: &Apache::lonnet::unescape($msg)); 97: $contrib=&Apache::lonnet::unescape($contrib); 98: $contrib=~s/\n/\<br \/\>/g; 99: ($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib); 100: if ($errors) { $contrib.="[Message not fully displayed due to incorrect embedded TeX]"; } 101: if ($errors && $snum eq $ENV{'user.name'} && 102: $sdom eq $ENV{'user.domain'} ) { 103: $contrib.="<br />[TeX error message: $errors]"; 104: } 105: $contrib=~s/\n/ /g; 106: $contrib=~s/\'/\&\#39\;/g; 107: my $sender=''; 108: if ($seeid) { 109: $sender=&Apache::loncommon::plainname($snum,$sdom); 110: my $nick=&Apache::loncommon::nickname($snum,$sdom); 111: if (($nick) && ($nick ne $sender)) { 112: $sender.=' '.$nick; 113: } 114: if ($anon) { $sender.=' [Anon]' }; 115: } elsif (!$anon) { 116: $sender=&Apache::loncommon::nickname($snum,$sdom); 117: } else { 118: $sender=&Apache::loncommon::screenname($snum,$sdom); 119: unless ($sender) { $sender="Anonymous"; } 120: } 121: $sender=~s/\'/\"/g; 122: my $color=$sender; 123: $color=~tr/a-j/0-9/; 124: $color=~tr/A-J/0-9/; 125: $color=~tr/k-t/0-9/; 126: $color=~tr/K-T/0-9/; 127: $color=~tr/u-z/0-5/; 128: $color=~tr/U-Z/0-5/; 129: $color=~s/\D//g; 130: $color=substr($color,0,6); 131: my $timestamp=localtime($msgtime); 132: my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/); 133: $newstuff.='<font color="#'.$color.'"><a name="'.$id.'"><b>'. 134: $sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '. 135: $contrib."</font><br>"; 136: $bottomid=$id; 137: } else { 138: $_=~/^(\w+)/; 139: if ($1 eq $ENV{'form.lastid'}) { $include=1; } 140: } 141: } 142: my $participant_output=join('<br />',sort @participants); 143: $r->print(<<ENDDOCUMENT); 144: <html> 145: <head> 146: <title>The LearningOnline Network with CAPA</title> 147: <meta HTTP-EQUIV="Refresh" CONTENT="5; url=/adm/chatfetch?lastid=$lastid"> 148: </head> 149: <body bgcolor="#FFFFFF"> 150: <script> 151: parent.chatout.document.writeln('$newstuff'); 152: parent.chatout.scroll(0,10000000); 153: </script> 154: $participant_output 155: </body> 156: </html> 157: ENDDOCUMENT 158: return OK; 159: } 160: 161: 1; 162: __END__