Annotation of loncom/interface/lonchatfetch.pm, revision 1.38
1.1 www 1: # The LearningOnline Network
2: # Chat Fetching
3: #
1.38 ! raeburn 4: # $Id: lonchatfetch.pm,v 1.37 2010/05/03 16:41:51 www 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: }
1.38 ! raeburn 66: } elsif (! &Apache::lonnet::allowed('plc',$env{'request.course.id'}.
1.17 albertel 67: ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
1.12 matthew 68: ) {
69: return HTTP_NOT_ACCEPTABLE;
70: }
1.6 www 71:
1.16 albertel 72: &Apache::loncommon::content_type($r,'text/html');
1.1 www 73: $r->send_http_header;
74: return OK if $r->header_only;
75:
76: # ------------------------------------------------------------ retrieve entries
77:
1.17 albertel 78: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1.4 www 79:
1.1 www 80: my @entries=split(/\:/,
1.8 www 81: &Apache::lonnet::reply(
1.21 raeburn 82: "chatretr:$cdom:$cnum:$env{'user.domain'}:$env{'user.name'}:$group",
83: $chome));
1.10 www 84: # Figure out what the last valid entry-id is
85: my ($lastid,$thentime,$idnum);
1.32 raeburn 86: foreach my $entry (@entries) {
87: $entry =~/^(\w+)/;
1.10 www 88: if ($1 ne 'active_participant') {
89: $lastid=$1;
90: ($thentime,$idnum)=split(/\_/,$lastid);
91: }
92: }
1.4 www 93: # ----------------------------------------------------------- Can see identity?
1.21 raeburn 94: my $seeid = &get_seeid_status();
1.1 www 95: # -------------------------------------------------------- see which ones apply
96: my $include=0;
1.32 raeburn 97: my $header;
1.1 www 98: my $newstuff='';
1.3 www 99: my $bottomid='';
1.17 albertel 100: unless ($env{'form.lastid'}) {
1.20 albertel 101: $include=1;
1.32 raeburn 102: $header =
1.20 albertel 103: &Apache::loncommon::start_page(undef,undef,
104: {'only_body' => 1,
105: 'bgcolor' => '#FFFFFF',
106: 'js_ready' => 1,});
1.2 www 107: }
1.9 www 108: my @participants=();
1.32 raeburn 109: foreach my $entry (@entries) {
110: my ($id,$msg,$udom)=split(/\:/,&unescape($entry));
1.9 www 111: if ($id eq 'active_participant') {
112: chomp($udom);
1.14 www 113: my $participant= &Apache::loncommon::nickname($msg,$udom);
1.32 raeburn 114: unless ($participant=~/\w/) { $participant=$msg.':'.$udom; }
1.14 www 115: $participants[$#participants+1]=$participant;
1.9 www 116: } elsif ($include) {
117: chomp($msg);
118: my ($msgtime,$msgnum)=split(/\_/,$id);
119: my ($sdom,$snum,$anon,$contrib)=split(/\:/,
1.25 www 120: &unescape($msg));
121: $contrib=&unescape($contrib);
1.18 albertel 122: &Apache::lonfeedback::newline_to_br(\$contrib);
1.11 albertel 123: ($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
1.36 bisitz 124: if ($errors) {
125: $contrib.=' <span class="LC_error">'
126: .&mt('(Message not fully displayed due to incorrect embedded TeX.)')
127: .'</span>';
128: }
1.17 albertel 129: if ($errors && $snum eq $env{'user.name'} &&
130: $sdom eq $env{'user.domain'} ) {
1.36 bisitz 131: $contrib.='<br /><span class="LC_error">'
132: .&mt('TeX error message: [_1]',$errors)
133: .'</span>';
1.11 albertel 134: }
1.9 www 135: $contrib=~s/\n/ /g;
136: $contrib=~s/\'/\&\#39\;/g;
137: my $sender='';
138: if ($seeid) {
139: $sender=&Apache::loncommon::plainname($snum,$sdom);
140: my $nick=&Apache::loncommon::nickname($snum,$sdom);
141: if (($nick) && ($nick ne $sender)) {
142: $sender.=' '.$nick;
143: }
1.32 raeburn 144: unless ($sender) { $sender=$snum.':'.$sdom; }
1.9 www 145: if ($anon) { $sender.=' [Anon]' };
146: } elsif (!$anon) {
147: $sender=&Apache::loncommon::nickname($snum,$sdom);
1.32 raeburn 148: unless ($sender) { $sender=$snum.':'.$sdom; }
1.7 www 149: } else {
1.9 www 150: $sender=&Apache::loncommon::screenname($snum,$sdom);
1.32 raeburn 151: unless ($sender) { $sender=&mt("Anonymous"); }
1.7 www 152: }
1.13 www 153: $sender=~s/\'/\&\#39\;/g;
1.9 www 154: my $color=$sender;
155: $color=~tr/a-j/0-9/;
156: $color=~tr/A-J/0-9/;
157: $color=~tr/k-t/0-9/;
158: $color=~tr/K-T/0-9/;
159: $color=~tr/u-z/0-5/;
160: $color=~tr/U-Z/0-5/;
161: $color=~s/\D//g;
162: $color=substr($color,0,6);
163: my $timestamp=localtime($msgtime);
164: my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/);
1.36 bisitz 165: $newstuff.='<span style="color:#'.$color.'"><a name="LC_'.$id.'"></a><b>'.
1.9 www 166: $sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
1.36 bisitz 167: $contrib."</span><br />";
1.26 albertel 168: $bottomid='LC_'.$id;
1.9 www 169: } else {
1.32 raeburn 170: $entry=~/^(\w+)/;
1.17 albertel 171: if ($1 eq $env{'form.lastid'}) { $include=1; }
1.9 www 172: }
1.1 www 173: }
1.9 www 174: my $participant_output=join('<br />',sort @participants);
1.21 raeburn 175: my $refresh_cmd = "/adm/chatfetch?lastid=$lastid";
176: if (defined($group)) {
1.26 albertel 177: $refresh_cmd .= "&group=$group";
1.21 raeburn 178: }
1.32 raeburn 179: my $headarg;
1.35 kalberla 180: my ($blocked,$blocktext) = blockstatus();
1.32 raeburn 181: if ($blocked) {
182: $newstuff = $blocktext;
183: $headarg = {'only_body' => 1,};
1.35 kalberla 184:
185: $r->print(<<ENDSCRIPT);
186: <script type="text/javascript">
187: parent.location.href="/adm/blockingstatus/?activity=chat"
188: </script>
189: ENDSCRIPT
1.32 raeburn 190: } else {
191: $headarg = {'redirect' => [5,$refresh_cmd,1],
192: 'only_body' => 1,};
193: }
1.33 hauer 194: my $start_page = &Apache::loncommon::start_page('Chat Room',undef,$headarg);
1.19 albertel 195: my $end_page = &Apache::loncommon::end_page();
1.1 www 196: $r->print(<<ENDDOCUMENT);
1.19 albertel 197: $start_page
198: <script type="text/javascript">
1.32 raeburn 199: parent.chatout.document.writeln('$header$newstuff');
1.3 www 200: parent.chatout.scroll(0,10000000);
1.1 www 201: </script>
1.21 raeburn 202: $grouptitle
1.9 www 203: $participant_output
1.19 albertel 204: $end_page
1.1 www 205: ENDDOCUMENT
206: return OK;
1.21 raeburn 207: }
208:
1.22 albertel 209: sub get_seeid_status {
1.21 raeburn 210: my $crs='/'.$env{'request.course.id'};
211: my $seeid;
212: if (exists($env{'form.group'})) {
213: $seeid = &Apache::lonnet::allowed('rci',$crs.'/'.$env{'form.group'});
214: } else {
215: if ($env{'request.course.sec'}) {
216: $crs.='_'.$env{'request.course.sec'};
217: }
218: $crs=~s/\_/\//g;
219: $seeid=&Apache::lonnet::allowed('rin',$crs);
220: }
221: return $seeid;
222: }
1.1 www 223:
1.32 raeburn 224: sub blockstatus {
225: my ($blocked,$output);
226: my %setters;
227: my ($startblock,$endblock) = &Apache::loncommon::blockcheck(\%setters,'chat');
228: if ($startblock && $endblock) {
229: $blocked = 1;
230: my $endblocktime = &Apache::lonlocal::locallocaltime($endblock);
1.34 bisitz 231: $output .= &mt('Chat Room will be unavailable to you until [_1] because communication is blocked in one or more of your courses:',$endblocktime).'<br /><br />';
1.32 raeburn 232: foreach my $course (keys(%setters)) {
233: my %courseinfo=&Apache::lonnet::coursedescription($course);
234: for (my $i=0; $i<@{$setters{$course}{staff}}; $i++) {
235: my ($uname,$udom) = @{$setters{$course}{staff}[$i]};
236: my $fullname = &Apache::loncommon::plainname($uname,$udom);
237: my ($openblock,$closeblock) = @{$setters{$course}{times}[$i]};
238: $openblock = &Apache::lonlocal::locallocaltime($openblock);
239: $closeblock= &Apache::lonlocal::locallocaltime($closeblock);
240: $output .= &mt('Block for [_1] starts: [_2], ends [_3], set by: [_4]<br />',$courseinfo{'description'},$openblock,$closeblock,$fullname);
241: }
242: }
243: }
244: return ($blocked,$output);
245: }
246:
1.1 www 247: 1;
248: __END__
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