Annotation of loncom/interface/lonchatfetch.pm, revision 1.34
1.1 www 1: # The LearningOnline Network
2: # Chat Fetching
3: #
1.34 ! bisitz 4: # $Id: lonchatfetch.pm,v 1.33 2009/02/25 16:39:54 hauer 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;
1.24 raeburn 36: use Apache::longroup;
1.32 raeburn 37: use Apache::lonlocal;
1.25 www 38: use lib '/home/httpd/lib/perl/';
39: use LONCAPA;
40:
1.1 www 41:
42: sub handler {
43: my $r = shift;
1.12 matthew 44:
1.22 albertel 45: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
46: ['lastid','group']);
1.21 raeburn 47: my ($group,$grouptitle);
48: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
49: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
50: if (defined($env{'form.group'})) {
51: $group = $env{'form.group'};
1.28 raeburn 52: if ((! &Apache::lonnet::allowed('pgc',$env{'request.course.id'}.'/'.
53: $group)) &&
1.31 raeburn 54: (! &Apache::lonnet::allowed('vcg',$env{'request.course.id'}.
55: ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'')))) {
1.21 raeburn 56: return HTTP_NOT_ACCEPTABLE;
57: }
1.24 raeburn 58: my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum,$group);
1.23 albertel 59: if (%curr_groups) {
1.22 albertel 60: my %group_info =
1.24 raeburn 61: &Apache::longroup::get_group_settings($curr_groups{$group});
1.22 albertel 62: $grouptitle =
1.25 www 63: '<b>'.&unescape($group_info{description}).
1.22 albertel 64: '</b><br />';
1.21 raeburn 65: }
66: } elsif (! &Apache::lonnet::allowed('pch',$env{'request.course.id'}.
1.17 albertel 67: ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
1.12 matthew 68: ) {
69: return HTTP_NOT_ACCEPTABLE;
70: }
1.6 www 71:
72: my $loaderror=&Apache::lonnet::overloaderror($r);
73: if ($loaderror) { return $loaderror; }
74: $loaderror=
75: &Apache::lonnet::overloaderror($r,
1.17 albertel 76: $env{'course.'.$env{'request.course.id'}.'.home'});
1.6 www 77: if ($loaderror) { return $loaderror; }
78:
1.16 albertel 79: &Apache::loncommon::content_type($r,'text/html');
1.1 www 80: $r->send_http_header;
81: return OK if $r->header_only;
82:
83: # ------------------------------------------------------------ retrieve entries
84:
1.17 albertel 85: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1.4 www 86:
1.1 www 87: my @entries=split(/\:/,
1.8 www 88: &Apache::lonnet::reply(
1.21 raeburn 89: "chatretr:$cdom:$cnum:$env{'user.domain'}:$env{'user.name'}:$group",
90: $chome));
1.10 www 91: # Figure out what the last valid entry-id is
92: my ($lastid,$thentime,$idnum);
1.32 raeburn 93: foreach my $entry (@entries) {
94: $entry =~/^(\w+)/;
1.10 www 95: if ($1 ne 'active_participant') {
96: $lastid=$1;
97: ($thentime,$idnum)=split(/\_/,$lastid);
98: }
99: }
1.4 www 100: # ----------------------------------------------------------- Can see identity?
1.21 raeburn 101: my $seeid = &get_seeid_status();
1.1 www 102: # -------------------------------------------------------- see which ones apply
103: my $include=0;
1.32 raeburn 104: my $header;
1.1 www 105: my $newstuff='';
1.3 www 106: my $bottomid='';
1.17 albertel 107: unless ($env{'form.lastid'}) {
1.20 albertel 108: $include=1;
1.32 raeburn 109: $header =
1.20 albertel 110: &Apache::loncommon::start_page(undef,undef,
111: {'only_body' => 1,
112: 'bgcolor' => '#FFFFFF',
113: 'js_ready' => 1,});
1.2 www 114: }
1.9 www 115: my @participants=();
1.32 raeburn 116: foreach my $entry (@entries) {
117: my ($id,$msg,$udom)=split(/\:/,&unescape($entry));
1.9 www 118: if ($id eq 'active_participant') {
119: chomp($udom);
1.14 www 120: my $participant= &Apache::loncommon::nickname($msg,$udom);
1.32 raeburn 121: unless ($participant=~/\w/) { $participant=$msg.':'.$udom; }
1.14 www 122: $participants[$#participants+1]=$participant;
1.9 www 123: } elsif ($include) {
124: chomp($msg);
125: my ($msgtime,$msgnum)=split(/\_/,$id);
126: my ($sdom,$snum,$anon,$contrib)=split(/\:/,
1.25 www 127: &unescape($msg));
128: $contrib=&unescape($contrib);
1.18 albertel 129: &Apache::lonfeedback::newline_to_br(\$contrib);
1.11 albertel 130: ($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
1.32 raeburn 131: if ($errors) { $contrib.=&mt('[Message not fully displayed due to incorrect embedded TeX]'); }
1.17 albertel 132: if ($errors && $snum eq $env{'user.name'} &&
133: $sdom eq $env{'user.domain'} ) {
1.32 raeburn 134: $contrib.='<br />'.&mt('[TeX error message: [_1]',$errors);
1.11 albertel 135: }
1.9 www 136: $contrib=~s/\n/ /g;
137: $contrib=~s/\'/\&\#39\;/g;
138: my $sender='';
139: if ($seeid) {
140: $sender=&Apache::loncommon::plainname($snum,$sdom);
141: my $nick=&Apache::loncommon::nickname($snum,$sdom);
142: if (($nick) && ($nick ne $sender)) {
143: $sender.=' '.$nick;
144: }
1.32 raeburn 145: unless ($sender) { $sender=$snum.':'.$sdom; }
1.9 www 146: if ($anon) { $sender.=' [Anon]' };
147: } elsif (!$anon) {
148: $sender=&Apache::loncommon::nickname($snum,$sdom);
1.32 raeburn 149: unless ($sender) { $sender=$snum.':'.$sdom; }
1.7 www 150: } else {
1.9 www 151: $sender=&Apache::loncommon::screenname($snum,$sdom);
1.32 raeburn 152: unless ($sender) { $sender=&mt("Anonymous"); }
1.7 www 153: }
1.13 www 154: $sender=~s/\'/\&\#39\;/g;
1.9 www 155: my $color=$sender;
156: $color=~tr/a-j/0-9/;
157: $color=~tr/A-J/0-9/;
158: $color=~tr/k-t/0-9/;
159: $color=~tr/K-T/0-9/;
160: $color=~tr/u-z/0-5/;
161: $color=~tr/U-Z/0-5/;
162: $color=~s/\D//g;
163: $color=substr($color,0,6);
164: my $timestamp=localtime($msgtime);
165: my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/);
1.26 albertel 166: $newstuff.='<font color="#'.$color.'"><a name="LC_'.$id.'"></a><b>'.
1.9 www 167: $sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
1.26 albertel 168: $contrib."</font><br />";
169: $bottomid='LC_'.$id;
1.9 www 170: } else {
1.32 raeburn 171: $entry=~/^(\w+)/;
1.17 albertel 172: if ($1 eq $env{'form.lastid'}) { $include=1; }
1.9 www 173: }
1.1 www 174: }
1.9 www 175: my $participant_output=join('<br />',sort @participants);
1.21 raeburn 176: my $refresh_cmd = "/adm/chatfetch?lastid=$lastid";
177: if (defined($group)) {
1.26 albertel 178: $refresh_cmd .= "&group=$group";
1.21 raeburn 179: }
1.32 raeburn 180: my $headarg;
181: my ($blocked,$blocktext) = &blockstatus();
182: if ($blocked) {
183: $newstuff = $blocktext;
184: $headarg = {'only_body' => 1,};
185: } else {
186: $headarg = {'redirect' => [5,$refresh_cmd,1],
187: 'only_body' => 1,};
188: }
1.33 hauer 189: my $start_page = &Apache::loncommon::start_page('Chat Room',undef,$headarg);
1.19 albertel 190: my $end_page = &Apache::loncommon::end_page();
1.1 www 191: $r->print(<<ENDDOCUMENT);
1.19 albertel 192: $start_page
193: <script type="text/javascript">
1.32 raeburn 194: parent.chatout.document.writeln('$header$newstuff');
1.3 www 195: parent.chatout.scroll(0,10000000);
1.1 www 196: </script>
1.21 raeburn 197: $grouptitle
1.9 www 198: $participant_output
1.19 albertel 199: $end_page
1.1 www 200: ENDDOCUMENT
201: return OK;
1.21 raeburn 202: }
203:
1.22 albertel 204: sub get_seeid_status {
1.21 raeburn 205: my $crs='/'.$env{'request.course.id'};
206: my $seeid;
207: if (exists($env{'form.group'})) {
208: $seeid = &Apache::lonnet::allowed('rci',$crs.'/'.$env{'form.group'});
209: } else {
210: if ($env{'request.course.sec'}) {
211: $crs.='_'.$env{'request.course.sec'};
212: }
213: $crs=~s/\_/\//g;
214: $seeid=&Apache::lonnet::allowed('rin',$crs);
215: }
216: return $seeid;
217: }
1.1 www 218:
1.32 raeburn 219: sub blockstatus {
220: my ($blocked,$output);
221: my %setters;
222: my ($startblock,$endblock) = &Apache::loncommon::blockcheck(\%setters,'chat');
223: if ($startblock && $endblock) {
224: $blocked = 1;
225: my $endblocktime = &Apache::lonlocal::locallocaltime($endblock);
1.34 ! bisitz 226: $output .= &mt('Chat Room will be unavailable to you until [_1] because communication is blocked in one or more of your courses:',$endblocktime).'<br /><br />';
1.32 raeburn 227: foreach my $course (keys(%setters)) {
228: my %courseinfo=&Apache::lonnet::coursedescription($course);
229: for (my $i=0; $i<@{$setters{$course}{staff}}; $i++) {
230: my ($uname,$udom) = @{$setters{$course}{staff}[$i]};
231: my $fullname = &Apache::loncommon::plainname($uname,$udom);
232: my ($openblock,$closeblock) = @{$setters{$course}{times}[$i]};
233: $openblock = &Apache::lonlocal::locallocaltime($openblock);
234: $closeblock= &Apache::lonlocal::locallocaltime($closeblock);
235: $output .= &mt('Block for [_1] starts: [_2], ends [_3], set by: [_4]<br />',$courseinfo{'description'},$openblock,$closeblock,$fullname);
236: }
237: }
238: }
239: return ($blocked,$output);
240: }
241:
1.1 www 242: 1;
243: __END__
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