Annotation of loncom/interface/lonchatfetch.pm, revision 1.20

1.1       www         1: # The LearningOnline Network
                      2: # Chat Fetching
                      3: #
1.20    ! albertel    4: # $Id: lonchatfetch.pm,v 1.19 2006/03/19 22:48:53 albertel 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 $r = shift;
1.12      matthew    39: 
1.17      albertel   40:     if (! &Apache::lonnet::allowed('pch',$env{'request.course.id'}.
                     41:              ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
1.12      matthew    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,
1.17      albertel   50:          $env{'course.'.$env{'request.course.id'}.'.home'});
1.6       www        51:     if ($loaderror) { return $loaderror; }
                     52: 
1.16      albertel   53:     &Apache::loncommon::content_type($r,'text/html');
1.1       www        54:     $r->send_http_header;
                     55:     return OK if $r->header_only;
                     56: 
                     57: # ------------------------------------------------------------ retrieve entries
                     58: 
1.17      albertel   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.'.$env{'request.course.id'}.'.home'};
1.4       www        62: 
1.1       www        63:     my @entries=split(/\:/,
1.8       www        64:        &Apache::lonnet::reply(
1.17      albertel   65:         "chatretr:$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?
1.17      albertel   76:     my $crs='/'.$env{'request.course.id'};
                     77:     if ($env{'request.course.sec'}) {
                     78:        $crs.='_'.$env{'request.course.sec'};
1.4       www        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 $bottomid='';
1.17      albertel   87:     unless ($env{'form.lastid'}) { 
1.20    ! albertel   88: 	$include=1; 
        !            89: 	$newstuff .=
        !            90: 	    &Apache::loncommon::start_page(undef,undef,
        !            91: 					   {'only_body' => 1,
        !            92: 					    'bgcolor'   => '#FFFFFF',
        !            93: 					    'js_ready'  => 1,});
1.2       www        94:     }
1.9       www        95:     my @participants=();
1.1       www        96:     foreach (@entries) {
1.9       www        97: 	my ($id,$msg,$udom)=split(/\:/,&Apache::lonnet::unescape($_));
                     98:  	if ($id eq 'active_participant') {
                     99:            chomp($udom);
1.14      www       100: 	   my $participant= &Apache::loncommon::nickname($msg,$udom);
                    101: 	   unless ($participant=~/\w/) { $participant=$msg.'@'.$udom; }
                    102: 	   $participants[$#participants+1]=$participant;
1.9       www       103: 	} elsif ($include) {
                    104: 	    chomp($msg);
                    105: 	    my ($msgtime,$msgnum)=split(/\_/,$id);
                    106: 	    my ($sdom,$snum,$anon,$contrib)=split(/\:/,
                    107: 					     &Apache::lonnet::unescape($msg));
                    108: 	    $contrib=&Apache::lonnet::unescape($contrib);
1.18      albertel  109: 	    &Apache::lonfeedback::newline_to_br(\$contrib);
1.11      albertel  110: 	    ($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
                    111: 	    if ($errors) { $contrib.="[Message not fully displayed due to incorrect embedded TeX]"; }
1.17      albertel  112: 	    if ($errors && $snum eq $env{'user.name'} &&
                    113: 		$sdom eq $env{'user.domain'} ) {
1.11      albertel  114: 		$contrib.="<br />[TeX error message: $errors]";
                    115: 	    }
1.9       www       116: 	    $contrib=~s/\n/ /g;
                    117: 	    $contrib=~s/\'/\&\#39\;/g;
                    118: 	    my $sender='';
                    119: 	    if ($seeid) {
                    120: 		$sender=&Apache::loncommon::plainname($snum,$sdom);
                    121: 		my $nick=&Apache::loncommon::nickname($snum,$sdom);
                    122: 		if (($nick) && ($nick ne $sender)) {
                    123: 		    $sender.=' '.$nick;
                    124: 		}
1.14      www       125: 		unless ($sender) { $sender=$snum.'@'.$sdom; }
1.9       www       126: 		if ($anon) { $sender.=' [Anon]' };
                    127: 	    } elsif (!$anon) {
                    128: 		$sender=&Apache::loncommon::nickname($snum,$sdom);
1.14      www       129: 		unless ($sender) { $sender=$snum.'@'.$sdom; }
1.7       www       130: 	    } else {
1.9       www       131: 		$sender=&Apache::loncommon::screenname($snum,$sdom);
                    132: 		unless ($sender) { $sender="Anonymous"; }
1.7       www       133: 	    }
1.13      www       134: 	    $sender=~s/\'/\&\#39\;/g;
1.9       www       135: 	    my $color=$sender;
                    136: 	    $color=~tr/a-j/0-9/;
                    137: 	    $color=~tr/A-J/0-9/;
                    138: 	    $color=~tr/k-t/0-9/;
                    139: 	    $color=~tr/K-T/0-9/;
                    140: 	    $color=~tr/u-z/0-5/;
                    141: 	    $color=~tr/U-Z/0-5/;
                    142: 	    $color=~s/\D//g;
                    143: 	    $color=substr($color,0,6);
                    144: 	    my $timestamp=localtime($msgtime);
                    145: 	    my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/);
                    146: 	    $newstuff.='<font color="#'.$color.'"><a name="'.$id.'"><b>'.
                    147: 		$sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
                    148: 		$contrib."</font><br>";
                    149: 	    $bottomid=$id;
                    150: 	} else {
                    151: 	    $_=~/^(\w+)/;
1.17      albertel  152: 	    if ($1 eq $env{'form.lastid'}) { $include=1; }
1.9       www       153: 	}
1.1       www       154:     }
1.9       www       155:     my $participant_output=join('<br />',sort @participants);
1.19      albertel  156:     my $start_page = 
                    157: 	&Apache::loncommon::start_page('Chat',undef,
                    158: 				       {'redirect'  => [5,"/adm/chatfetch?lastid=$lastid"],
                    159: 					'only_body' => 1,});
                    160:     my $end_page = &Apache::loncommon::end_page();
1.1       www       161:     $r->print(<<ENDDOCUMENT);
1.19      albertel  162: $start_page
                    163: <script type="text/javascript">
1.1       www       164: parent.chatout.document.writeln('$newstuff');
1.3       www       165: parent.chatout.scroll(0,10000000);
1.1       www       166: </script>
1.9       www       167: $participant_output
1.19      albertel  168: $end_page
1.1       www       169: ENDDOCUMENT
                    170:     return OK;
                    171: } 
                    172: 
                    173: 1;
                    174: __END__

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