Annotation of loncom/interface/lonchatfetch.pm, revision 1.35

1.1       www         1: # The LearningOnline Network
                      2: # Chat Fetching
                      3: #
1.35    ! kalberla    4: # $Id: lonchatfetch.pm,v 1.34 2009/02/25 18:44:29 bisitz 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:         $refresh_cmd .= "&amp;group=$group";
1.21      raeburn   179:     }
1.32      raeburn   180:     my $headarg;
1.35    ! kalberla  181:     my ($blocked,$blocktext) = blockstatus();
1.32      raeburn   182:     if ($blocked) {
                    183:         $newstuff = $blocktext;
                    184:         $headarg =  {'only_body' => 1,};
1.35    ! kalberla  185: 
        !           186: 	$r->print(<<ENDSCRIPT);
        !           187:           <script type="text/javascript">
        !           188:             parent.location.href="/adm/blockingstatus/?activity=chat"
        !           189:           </script>
        !           190: ENDSCRIPT
1.32      raeburn   191:     } else {
                    192:         $headarg = {'redirect'  => [5,$refresh_cmd,1],
                    193:                                     'only_body' => 1,};
                    194:     }
1.33      hauer     195:     my $start_page = &Apache::loncommon::start_page('Chat Room',undef,$headarg); 
1.19      albertel  196:     my $end_page = &Apache::loncommon::end_page();
1.1       www       197:     $r->print(<<ENDDOCUMENT);
1.19      albertel  198: $start_page
                    199: <script type="text/javascript">
1.32      raeburn   200: parent.chatout.document.writeln('$header$newstuff');
1.3       www       201: parent.chatout.scroll(0,10000000);
1.1       www       202: </script>
1.21      raeburn   203: $grouptitle
1.9       www       204: $participant_output
1.19      albertel  205: $end_page
1.1       www       206: ENDDOCUMENT
                    207:     return OK;
1.21      raeburn   208: }
                    209: 
1.22      albertel  210: sub get_seeid_status {
1.21      raeburn   211:     my $crs='/'.$env{'request.course.id'};
                    212:     my $seeid;
                    213:     if (exists($env{'form.group'})) {
                    214:         $seeid = &Apache::lonnet::allowed('rci',$crs.'/'.$env{'form.group'});
                    215:     } else {
                    216:         if ($env{'request.course.sec'}) {
                    217:             $crs.='_'.$env{'request.course.sec'};
                    218:         }
                    219:         $crs=~s/\_/\//g;
                    220:         $seeid=&Apache::lonnet::allowed('rin',$crs);
                    221:     }
                    222:     return $seeid;
                    223: }
1.1       www       224: 
1.32      raeburn   225: sub blockstatus {
                    226:     my ($blocked,$output);
                    227:     my %setters;
                    228:     my ($startblock,$endblock) = &Apache::loncommon::blockcheck(\%setters,'chat');
                    229:     if ($startblock && $endblock) {
                    230:         $blocked = 1;
                    231:         my $endblocktime = &Apache::lonlocal::locallocaltime($endblock);
1.34      bisitz    232:         $output .= &mt('Chat Room will be unavailable to you until [_1] because communication is blocked in one or more of your courses:',$endblocktime).'<br /><br />';
1.32      raeburn   233:         foreach my $course (keys(%setters)) {
                    234:             my %courseinfo=&Apache::lonnet::coursedescription($course);
                    235:             for (my $i=0; $i<@{$setters{$course}{staff}}; $i++) {
                    236:                 my ($uname,$udom) = @{$setters{$course}{staff}[$i]};
                    237:                 my $fullname = &Apache::loncommon::plainname($uname,$udom);
                    238:                 my ($openblock,$closeblock) = @{$setters{$course}{times}[$i]};
                    239:                 $openblock = &Apache::lonlocal::locallocaltime($openblock);
                    240:                 $closeblock= &Apache::lonlocal::locallocaltime($closeblock);
                    241:                 $output .= &mt('Block for [_1] starts: [_2], ends [_3], set by: [_4]<br />',$courseinfo{'description'},$openblock,$closeblock,$fullname);
                    242:             }
                    243:         }
                    244:     }
                    245:     return ($blocked,$output);
                    246: }
                    247: 
1.1       www       248: 1;
                    249: __END__

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