1: # The LearningOnline Network
2: # Chat Fetching
3: #
4: # $Id: lonchatfetch.pm,v 1.31 2006/07/17 16:10:57 raeburn 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 :http);
33: use Apache::lontexconvert;
34: use Apache::loncommon;
35: use Apache::lonnet;
36: use Apache::longroup;
37: use lib '/home/httpd/lib/perl/';
38: use LONCAPA;
39:
40:
41: sub handler {
42: my $r = shift;
43:
44: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
45: ['lastid','group']);
46: my ($group,$grouptitle);
47: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
48: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
49: if (defined($env{'form.group'})) {
50: $group = $env{'form.group'};
51: if ((! &Apache::lonnet::allowed('pgc',$env{'request.course.id'}.'/'.
52: $group)) &&
53: (! &Apache::lonnet::allowed('vcg',$env{'request.course.id'}.
54: ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'')))) {
55: return HTTP_NOT_ACCEPTABLE;
56: }
57: my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum,$group);
58: if (%curr_groups) {
59: my %group_info =
60: &Apache::longroup::get_group_settings($curr_groups{$group});
61: $grouptitle =
62: '<b>'.&unescape($group_info{description}).
63: '</b><br />';
64: }
65: } elsif (! &Apache::lonnet::allowed('pch',$env{'request.course.id'}.
66: ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
67: ) {
68: return HTTP_NOT_ACCEPTABLE;
69: }
70:
71: my $loaderror=&Apache::lonnet::overloaderror($r);
72: if ($loaderror) { return $loaderror; }
73: $loaderror=
74: &Apache::lonnet::overloaderror($r,
75: $env{'course.'.$env{'request.course.id'}.'.home'});
76: if ($loaderror) { return $loaderror; }
77:
78: &Apache::loncommon::content_type($r,'text/html');
79: $r->send_http_header;
80: return OK if $r->header_only;
81:
82: # ------------------------------------------------------------ retrieve entries
83:
84: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
85:
86: my @entries=split(/\:/,
87: &Apache::lonnet::reply(
88: "chatretr:$cdom:$cnum:$env{'user.domain'}:$env{'user.name'}:$group",
89: $chome));
90: # Figure out what the last valid entry-id is
91: my ($lastid,$thentime,$idnum);
92: foreach (@entries) {
93: $_=~/^(\w+)/;
94: if ($1 ne 'active_participant') {
95: $lastid=$1;
96: ($thentime,$idnum)=split(/\_/,$lastid);
97: }
98: }
99: # ----------------------------------------------------------- Can see identity?
100: my $seeid = &get_seeid_status();
101: # -------------------------------------------------------- see which ones apply
102: my $include=0;
103: my $newstuff='';
104: my $bottomid='';
105: unless ($env{'form.lastid'}) {
106: $include=1;
107: $newstuff .=
108: &Apache::loncommon::start_page(undef,undef,
109: {'only_body' => 1,
110: 'bgcolor' => '#FFFFFF',
111: 'js_ready' => 1,});
112: }
113: my @participants=();
114: foreach (@entries) {
115: my ($id,$msg,$udom)=split(/\:/,&unescape($_));
116: if ($id eq 'active_participant') {
117: chomp($udom);
118: my $participant= &Apache::loncommon::nickname($msg,$udom);
119: unless ($participant=~/\w/) { $participant=$msg.'@'.$udom; }
120: $participants[$#participants+1]=$participant;
121: } elsif ($include) {
122: chomp($msg);
123: my ($msgtime,$msgnum)=split(/\_/,$id);
124: my ($sdom,$snum,$anon,$contrib)=split(/\:/,
125: &unescape($msg));
126: $contrib=&unescape($contrib);
127: &Apache::lonfeedback::newline_to_br(\$contrib);
128: ($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
129: if ($errors) { $contrib.="[Message not fully displayed due to incorrect embedded TeX]"; }
130: if ($errors && $snum eq $env{'user.name'} &&
131: $sdom eq $env{'user.domain'} ) {
132: $contrib.="<br />[TeX error message: $errors]";
133: }
134: $contrib=~s/\n/ /g;
135: $contrib=~s/\'/\&\#39\;/g;
136: my $sender='';
137: if ($seeid) {
138: $sender=&Apache::loncommon::plainname($snum,$sdom);
139: my $nick=&Apache::loncommon::nickname($snum,$sdom);
140: if (($nick) && ($nick ne $sender)) {
141: $sender.=' '.$nick;
142: }
143: unless ($sender) { $sender=$snum.'@'.$sdom; }
144: if ($anon) { $sender.=' [Anon]' };
145: } elsif (!$anon) {
146: $sender=&Apache::loncommon::nickname($snum,$sdom);
147: unless ($sender) { $sender=$snum.'@'.$sdom; }
148: } else {
149: $sender=&Apache::loncommon::screenname($snum,$sdom);
150: unless ($sender) { $sender="Anonymous"; }
151: }
152: $sender=~s/\'/\&\#39\;/g;
153: my $color=$sender;
154: $color=~tr/a-j/0-9/;
155: $color=~tr/A-J/0-9/;
156: $color=~tr/k-t/0-9/;
157: $color=~tr/K-T/0-9/;
158: $color=~tr/u-z/0-5/;
159: $color=~tr/U-Z/0-5/;
160: $color=~s/\D//g;
161: $color=substr($color,0,6);
162: my $timestamp=localtime($msgtime);
163: my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/);
164: $newstuff.='<font color="#'.$color.'"><a name="LC_'.$id.'"></a><b>'.
165: $sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
166: $contrib."</font><br />";
167: $bottomid='LC_'.$id;
168: } else {
169: $_=~/^(\w+)/;
170: if ($1 eq $env{'form.lastid'}) { $include=1; }
171: }
172: }
173: my $participant_output=join('<br />',sort @participants);
174: my $refresh_cmd = "/adm/chatfetch?lastid=$lastid";
175: if (defined($group)) {
176: $refresh_cmd .= "&group=$group";
177: }
178: my $start_page =
179: &Apache::loncommon::start_page('Chat',undef,
180: {'redirect' => [5,$refresh_cmd,1],
181: 'only_body' => 1,});
182: my $end_page = &Apache::loncommon::end_page();
183: $r->print(<<ENDDOCUMENT);
184: $start_page
185: <script type="text/javascript">
186: parent.chatout.document.writeln('$newstuff');
187: parent.chatout.scroll(0,10000000);
188: </script>
189: $grouptitle
190: $participant_output
191: $end_page
192: ENDDOCUMENT
193: return OK;
194: }
195:
196: sub get_seeid_status {
197: my $crs='/'.$env{'request.course.id'};
198: my $seeid;
199: if (exists($env{'form.group'})) {
200: $seeid = &Apache::lonnet::allowed('rci',$crs.'/'.$env{'form.group'});
201: } else {
202: if ($env{'request.course.sec'}) {
203: $crs.='_'.$env{'request.course.sec'};
204: }
205: $crs=~s/\_/\//g;
206: $seeid=&Apache::lonnet::allowed('rin',$crs);
207: }
208: return $seeid;
209: }
210:
211: 1;
212: __END__
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