1: # The LearningOnline Network
2: # Chat Fetching
3: #
4: # $Id: lonchatfetch.pm,v 1.25 2006/05/30 12:46:08 www 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: $group) ) {
53: return HTTP_NOT_ACCEPTABLE;
54: }
55: my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum,$group);
56: if (%curr_groups) {
57: my %group_info =
58: &Apache::longroup::get_group_settings($curr_groups{$group});
59: $grouptitle =
60: '<b>'.&unescape($group_info{description}).
61: '</b><br />';
62: }
63: } elsif (! &Apache::lonnet::allowed('pch',$env{'request.course.id'}.
64: ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
65: ) {
66: return HTTP_NOT_ACCEPTABLE;
67: }
68:
69: my $loaderror=&Apache::lonnet::overloaderror($r);
70: if ($loaderror) { return $loaderror; }
71: $loaderror=
72: &Apache::lonnet::overloaderror($r,
73: $env{'course.'.$env{'request.course.id'}.'.home'});
74: if ($loaderror) { return $loaderror; }
75:
76: &Apache::loncommon::content_type($r,'text/html');
77: $r->send_http_header;
78: return OK if $r->header_only;
79:
80: # ------------------------------------------------------------ retrieve entries
81:
82: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
83:
84: my @entries=split(/\:/,
85: &Apache::lonnet::reply(
86: "chatretr:$cdom:$cnum:$env{'user.domain'}:$env{'user.name'}:$group",
87: $chome));
88: # Figure out what the last valid entry-id is
89: my ($lastid,$thentime,$idnum);
90: foreach (@entries) {
91: $_=~/^(\w+)/;
92: if ($1 ne 'active_participant') {
93: $lastid=$1;
94: ($thentime,$idnum)=split(/\_/,$lastid);
95: }
96: }
97: # ----------------------------------------------------------- Can see identity?
98: my $seeid = &get_seeid_status();
99: # -------------------------------------------------------- see which ones apply
100: my $include=0;
101: my $newstuff='';
102: my $bottomid='';
103: unless ($env{'form.lastid'}) {
104: $include=1;
105: $newstuff .=
106: &Apache::loncommon::start_page(undef,undef,
107: {'only_body' => 1,
108: 'bgcolor' => '#FFFFFF',
109: 'js_ready' => 1,});
110: }
111: my @participants=();
112: foreach (@entries) {
113: my ($id,$msg,$udom)=split(/\:/,&unescape($_));
114: if ($id eq 'active_participant') {
115: chomp($udom);
116: my $participant= &Apache::loncommon::nickname($msg,$udom);
117: unless ($participant=~/\w/) { $participant=$msg.'@'.$udom; }
118: $participants[$#participants+1]=$participant;
119: } elsif ($include) {
120: chomp($msg);
121: my ($msgtime,$msgnum)=split(/\_/,$id);
122: my ($sdom,$snum,$anon,$contrib)=split(/\:/,
123: &unescape($msg));
124: $contrib=&unescape($contrib);
125: &Apache::lonfeedback::newline_to_br(\$contrib);
126: ($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
127: if ($errors) { $contrib.="[Message not fully displayed due to incorrect embedded TeX]"; }
128: if ($errors && $snum eq $env{'user.name'} &&
129: $sdom eq $env{'user.domain'} ) {
130: $contrib.="<br />[TeX error message: $errors]";
131: }
132: $contrib=~s/\n/ /g;
133: $contrib=~s/\'/\&\#39\;/g;
134: my $sender='';
135: if ($seeid) {
136: $sender=&Apache::loncommon::plainname($snum,$sdom);
137: my $nick=&Apache::loncommon::nickname($snum,$sdom);
138: if (($nick) && ($nick ne $sender)) {
139: $sender.=' '.$nick;
140: }
141: unless ($sender) { $sender=$snum.'@'.$sdom; }
142: if ($anon) { $sender.=' [Anon]' };
143: } elsif (!$anon) {
144: $sender=&Apache::loncommon::nickname($snum,$sdom);
145: unless ($sender) { $sender=$snum.'@'.$sdom; }
146: } else {
147: $sender=&Apache::loncommon::screenname($snum,$sdom);
148: unless ($sender) { $sender="Anonymous"; }
149: }
150: $sender=~s/\'/\&\#39\;/g;
151: my $color=$sender;
152: $color=~tr/a-j/0-9/;
153: $color=~tr/A-J/0-9/;
154: $color=~tr/k-t/0-9/;
155: $color=~tr/K-T/0-9/;
156: $color=~tr/u-z/0-5/;
157: $color=~tr/U-Z/0-5/;
158: $color=~s/\D//g;
159: $color=substr($color,0,6);
160: my $timestamp=localtime($msgtime);
161: my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/);
162: $newstuff.='<font color="#'.$color.'"><a name="'.$id.'"><b>'.
163: $sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
164: $contrib."</font><br>";
165: $bottomid=$id;
166: } else {
167: $_=~/^(\w+)/;
168: if ($1 eq $env{'form.lastid'}) { $include=1; }
169: }
170: }
171: my $participant_output=join('<br />',sort @participants);
172: my $refresh_cmd = "/adm/chatfetch?lastid=$lastid";
173: if (defined($group)) {
174: $refresh_cmd .= "&group=$group";
175: }
176: my $start_page =
177: &Apache::loncommon::start_page('Chat',undef,
178: {'redirect' => [5,$refresh_cmd],
179: 'only_body' => 1,});
180: my $end_page = &Apache::loncommon::end_page();
181: $r->print(<<ENDDOCUMENT);
182: $start_page
183: <script type="text/javascript">
184: parent.chatout.document.writeln('$newstuff');
185: parent.chatout.scroll(0,10000000);
186: </script>
187: $grouptitle
188: $participant_output
189: $end_page
190: ENDDOCUMENT
191: return OK;
192: }
193:
194: sub get_seeid_status {
195: my $crs='/'.$env{'request.course.id'};
196: my $seeid;
197: if (exists($env{'form.group'})) {
198: $seeid = &Apache::lonnet::allowed('rci',$crs.'/'.$env{'form.group'});
199: } else {
200: if ($env{'request.course.sec'}) {
201: $crs.='_'.$env{'request.course.sec'};
202: }
203: $crs=~s/\_/\//g;
204: $seeid=&Apache::lonnet::allowed('rin',$crs);
205: }
206: return $seeid;
207: }
208:
209: 1;
210: __END__
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