File:
[LON-CAPA] /
loncom /
interface /
lonchatfetch.pm
Revision
1.38:
download - view:
text,
annotated -
select for diffs
Thu Nov 18 23:18:39 2010 UTC (13 years, 9 months ago) by
raeburn
Branches:
MAIN
CVS tags:
version_2_10_X,
version_2_10_1,
version_2_10_0_RC2,
version_2_10_0,
loncapaMITrelate_1,
language_hyphenation_merge,
language_hyphenation,
HEAD,
BZ4492-merge,
BZ4492-feature_horizontal_radioresponse
- pcl is the priv for chat (not pch); was reversed in lonchatfetch.pm from the
beginning (rev 1.12).
# The LearningOnline Network
# Chat Fetching
#
# $Id: lonchatfetch.pm,v 1.38 2010/11/18 23:18:39 raeburn 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;
use Apache::longroup;
use Apache::lonlocal;
use lib '/home/httpd/lib/perl/';
use LONCAPA;
sub handler {
my $r = shift;
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['lastid','group']);
my ($group,$grouptitle);
my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
if (defined($env{'form.group'})) {
$group = $env{'form.group'};
if ((! &Apache::lonnet::allowed('pgc',$env{'request.course.id'}.'/'.
$group)) &&
(! &Apache::lonnet::allowed('vcg',$env{'request.course.id'}.
($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'')))) {
return HTTP_NOT_ACCEPTABLE;
}
my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum,$group);
if (%curr_groups) {
my %group_info =
&Apache::longroup::get_group_settings($curr_groups{$group});
$grouptitle =
'<b>'.&unescape($group_info{description}).
'</b><br />';
}
} elsif (! &Apache::lonnet::allowed('plc',$env{'request.course.id'}.
($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
) {
return HTTP_NOT_ACCEPTABLE;
}
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
return OK if $r->header_only;
# ------------------------------------------------------------ retrieve entries
my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
my @entries=split(/\:/,
&Apache::lonnet::reply(
"chatretr:$cdom:$cnum:$env{'user.domain'}:$env{'user.name'}:$group",
$chome));
# Figure out what the last valid entry-id is
my ($lastid,$thentime,$idnum);
foreach my $entry (@entries) {
$entry =~/^(\w+)/;
if ($1 ne 'active_participant') {
$lastid=$1;
($thentime,$idnum)=split(/\_/,$lastid);
}
}
# ----------------------------------------------------------- Can see identity?
my $seeid = &get_seeid_status();
# -------------------------------------------------------- see which ones apply
my $include=0;
my $header;
my $newstuff='';
my $bottomid='';
unless ($env{'form.lastid'}) {
$include=1;
$header =
&Apache::loncommon::start_page(undef,undef,
{'only_body' => 1,
'bgcolor' => '#FFFFFF',
'js_ready' => 1,});
}
my @participants=();
foreach my $entry (@entries) {
my ($id,$msg,$udom)=split(/\:/,&unescape($entry));
if ($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(/\:/,
&unescape($msg));
$contrib=&unescape($contrib);
&Apache::lonfeedback::newline_to_br(\$contrib);
($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
if ($errors) {
$contrib.=' <span class="LC_error">'
.&mt('(Message not fully displayed due to incorrect embedded TeX.)')
.'</span>';
}
if ($errors && $snum eq $env{'user.name'} &&
$sdom eq $env{'user.domain'} ) {
$contrib.='<br /><span class="LC_error">'
.&mt('TeX error message: [_1]',$errors)
.'</span>';
}
$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=&mt("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)/);
$newstuff.='<span style="color:#'.$color.'"><a name="LC_'.$id.'"></a><b>'.
$sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
$contrib."</span><br />";
$bottomid='LC_'.$id;
} else {
$entry=~/^(\w+)/;
if ($1 eq $env{'form.lastid'}) { $include=1; }
}
}
my $participant_output=join('<br />',sort @participants);
my $refresh_cmd = "/adm/chatfetch?lastid=$lastid";
if (defined($group)) {
$refresh_cmd .= "&group=$group";
}
my $headarg;
my ($blocked,$blocktext) = blockstatus();
if ($blocked) {
$newstuff = $blocktext;
$headarg = {'only_body' => 1,};
$r->print(<<ENDSCRIPT);
<script type="text/javascript">
parent.location.href="/adm/blockingstatus/?activity=chat"
</script>
ENDSCRIPT
} else {
$headarg = {'redirect' => [5,$refresh_cmd,1],
'only_body' => 1,};
}
my $start_page = &Apache::loncommon::start_page('Chat Room',undef,$headarg);
my $end_page = &Apache::loncommon::end_page();
$r->print(<<ENDDOCUMENT);
$start_page
<script type="text/javascript">
parent.chatout.document.writeln('$header$newstuff');
parent.chatout.scroll(0,10000000);
</script>
$grouptitle
$participant_output
$end_page
ENDDOCUMENT
return OK;
}
sub get_seeid_status {
my $crs='/'.$env{'request.course.id'};
my $seeid;
if (exists($env{'form.group'})) {
$seeid = &Apache::lonnet::allowed('rci',$crs.'/'.$env{'form.group'});
} else {
if ($env{'request.course.sec'}) {
$crs.='_'.$env{'request.course.sec'};
}
$crs=~s/\_/\//g;
$seeid=&Apache::lonnet::allowed('rin',$crs);
}
return $seeid;
}
sub blockstatus {
my ($blocked,$output);
my %setters;
my ($startblock,$endblock) = &Apache::loncommon::blockcheck(\%setters,'chat');
if ($startblock && $endblock) {
$blocked = 1;
my $endblocktime = &Apache::lonlocal::locallocaltime($endblock);
$output .= &mt('Chat Room will be unavailable to you until [_1] because communication is blocked in one or more of your courses:',$endblocktime).'<br /><br />';
foreach my $course (keys(%setters)) {
my %courseinfo=&Apache::lonnet::coursedescription($course);
for (my $i=0; $i<@{$setters{$course}{staff}}; $i++) {
my ($uname,$udom) = @{$setters{$course}{staff}[$i]};
my $fullname = &Apache::loncommon::plainname($uname,$udom);
my ($openblock,$closeblock) = @{$setters{$course}{times}[$i]};
$openblock = &Apache::lonlocal::locallocaltime($openblock);
$closeblock= &Apache::lonlocal::locallocaltime($closeblock);
$output .= &mt('Block for [_1] starts: [_2], ends [_3], set by: [_4]<br />',$courseinfo{'description'},$openblock,$closeblock,$fullname);
}
}
}
return ($blocked,$output);
}
1;
__END__
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