--- loncom/interface/lonchatfetch.pm	2004/06/27 17:14:28	1.13
+++ loncom/interface/lonchatfetch.pm	2009/10/23 10:21:00	1.36
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Chat Fetching
 #
-# $Id: lonchatfetch.pm,v 1.13 2004/06/27 17:14:28 www Exp $
+# $Id: lonchatfetch.pm,v 1.36 2009/10/23 10:21:00 bisitz Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -33,12 +33,38 @@ use Apache::Constants qw(:common :http);
 use Apache::lontexconvert;
 use Apache::loncommon;
 use Apache::lonnet;
+use Apache::longroup;
+use Apache::lonlocal;
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
+ 
 
 sub handler {
     my $r = shift;
 
-    if (! &Apache::lonnet::allowed('pch',$ENV{'request.course.id'}.
-             ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))
+    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+					    ['lastid','group']);
+    my ($group,$grouptitle);
+    my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
+    my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
+    if (defined($env{'form.group'})) {
+        $group = $env{'form.group'};
+        if ((! &Apache::lonnet::allowed('pgc',$env{'request.course.id'}.'/'.
+				       $group)) &&
+           (! &Apache::lonnet::allowed('vcg',$env{'request.course.id'}.
+         ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'')))) {
+            return HTTP_NOT_ACCEPTABLE;
+        }
+        my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum,$group);
+        if (%curr_groups) {
+            my %group_info = 
+		&Apache::longroup::get_group_settings($curr_groups{$group});
+            $grouptitle = 
+		'<b>'.&unescape($group_info{description}).
+		'</b><br />';
+        }
+    } elsif (! &Apache::lonnet::allowed('pch',$env{'request.course.id'}.
+             ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
         ) {
         return HTTP_NOT_ACCEPTABLE;
     }
@@ -47,66 +73,71 @@ sub handler {
     if ($loaderror) { return $loaderror; }
     $loaderror=
        &Apache::lonnet::overloaderror($r,
-         $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
+         $env{'course.'.$env{'request.course.id'}.'.home'});
     if ($loaderror) { return $loaderror; }
 
-    $r->content_type('text/html');
+    &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
     return OK if $r->header_only;
 
 # ------------------------------------------------------------ retrieve entries
 
-    my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
-    my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
-    my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
+    my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
 
     my @entries=split(/\:/,
        &Apache::lonnet::reply(
-        "chatretr:$cdom:$cnum:$ENV{'user.domain'}:$ENV{'user.name'}",$chome));
+        "chatretr:$cdom:$cnum:$env{'user.domain'}:$env{'user.name'}:$group",
+        $chome));
 # Figure out what the last valid entry-id is
     my ($lastid,$thentime,$idnum);
-    foreach (@entries) {
-	$_=~/^(\w+)/;
+    foreach my $entry (@entries) {
+	$entry =~/^(\w+)/;
         if ($1 ne 'active_participant') {
 	    $lastid=$1;
             ($thentime,$idnum)=split(/\_/,$lastid);
 	}
     }
 # ----------------------------------------------------------- Can see identity?
-    my $crs='/'.$ENV{'request.course.id'};
-    if ($ENV{'request.course.sec'}) {
-       $crs.='_'.$ENV{'request.course.sec'};
-    }                 
-    $crs=~s/\_/\//g;
-    my $seeid=&Apache::lonnet::allowed('rin',$crs);
+    my $seeid = &get_seeid_status();
 # -------------------------------------------------------- see which ones apply
-    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['lastid']);
     my $include=0;
+    my $header;
     my $newstuff='';
     my $bottomid='';
-    unless ($ENV{'form.lastid'}) { 
-       $include=1; 
-       $newstuff='<html><body bgcolor="#FFFFFF">';
+    unless ($env{'form.lastid'}) { 
+	$include=1; 
+	$header = 
+	    &Apache::loncommon::start_page(undef,undef,
+					   {'only_body' => 1,
+					    'bgcolor'   => '#FFFFFF',
+					    'js_ready'  => 1,});
     }
     my @participants=();
-    foreach (@entries) {
-	my ($id,$msg,$udom)=split(/\:/,&Apache::lonnet::unescape($_));
+    foreach my $entry (@entries) {
+	my ($id,$msg,$udom)=split(/\:/,&unescape($entry));
  	if ($id eq 'active_participant') {
            chomp($udom);
-	   $participants[$#participants+1]=
-           &Apache::loncommon::nickname($msg,$udom);
+	   my $participant= &Apache::loncommon::nickname($msg,$udom);
+	   unless ($participant=~/\w/) { $participant=$msg.':'.$udom; }
+	   $participants[$#participants+1]=$participant;
 	} elsif ($include) {
 	    chomp($msg);
 	    my ($msgtime,$msgnum)=split(/\_/,$id);
 	    my ($sdom,$snum,$anon,$contrib)=split(/\:/,
-					     &Apache::lonnet::unescape($msg));
-	    $contrib=&Apache::lonnet::unescape($contrib);
-	    $contrib=~s/\n/\<br \/\>/g;
+					     &unescape($msg));
+	    $contrib=&unescape($contrib);
+	    &Apache::lonfeedback::newline_to_br(\$contrib);
 	    ($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
-	    if ($errors) { $contrib.="[Message not fully displayed due to incorrect embedded TeX]"; }
-	    if ($errors && $snum eq $ENV{'user.name'} &&
-		$sdom eq $ENV{'user.domain'} ) {
-		$contrib.="<br />[TeX error message: $errors]";
+            if ($errors) {
+                $contrib.=' <span class="LC_error">'
+                         .&mt('(Message not fully displayed due to incorrect embedded TeX.)')
+                         .'</span>';
+            }
+	    if ($errors && $snum eq $env{'user.name'} &&
+		$sdom eq $env{'user.domain'} ) {
+                $contrib.='<br /><span class="LC_error">'
+                         .&mt('TeX error message: [_1]',$errors)
+                         .'</span>';
 	    }
 	    $contrib=~s/\n/ /g;
 	    $contrib=~s/\'/\&\#39\;/g;
@@ -117,12 +148,14 @@ sub handler {
 		if (($nick) && ($nick ne $sender)) {
 		    $sender.=' '.$nick;
 		}
+		unless ($sender) { $sender=$snum.':'.$sdom; }
 		if ($anon) { $sender.=' [Anon]' };
 	    } elsif (!$anon) {
 		$sender=&Apache::loncommon::nickname($snum,$sdom);
+		unless ($sender) { $sender=$snum.':'.$sdom; }
 	    } else {
 		$sender=&Apache::loncommon::screenname($snum,$sdom);
-		unless ($sender) { $sender="Anonymous"; }
+		unless ($sender) { $sender=&mt("Anonymous"); }
 	    }
 	    $sender=~s/\'/\&\#39\;/g;
 	    my $color=$sender;
@@ -136,33 +169,87 @@ sub handler {
 	    $color=substr($color,0,6);
 	    my $timestamp=localtime($msgtime);
 	    my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/);
-	    $newstuff.='<font color="#'.$color.'"><a name="'.$id.'"><b>'.
+	    $newstuff.='<span style="color:#'.$color.'"><a name="LC_'.$id.'"></a><b>'.
 		$sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
-		$contrib."</font><br>";
-	    $bottomid=$id;
+		$contrib."</span><br />";
+	    $bottomid='LC_'.$id;
 	} else {
-	    $_=~/^(\w+)/;
-	    if ($1 eq $ENV{'form.lastid'}) { $include=1; }
+	    $entry=~/^(\w+)/;
+	    if ($1 eq $env{'form.lastid'}) { $include=1; }
 	}
     }
     my $participant_output=join('<br />',sort @participants);
+    my $refresh_cmd = "/adm/chatfetch?lastid=$lastid";
+    if (defined($group)) {
+        $refresh_cmd .= "&amp;group=$group";
+    }
+    my $headarg;
+    my ($blocked,$blocktext) = blockstatus();
+    if ($blocked) {
+        $newstuff = $blocktext;
+        $headarg =  {'only_body' => 1,};
+
+	$r->print(<<ENDSCRIPT);
+          <script type="text/javascript">
+            parent.location.href="/adm/blockingstatus/?activity=chat"
+          </script>
+ENDSCRIPT
+    } else {
+        $headarg = {'redirect'  => [5,$refresh_cmd,1],
+                                    'only_body' => 1,};
+    }
+    my $start_page = &Apache::loncommon::start_page('Chat Room',undef,$headarg); 
+    my $end_page = &Apache::loncommon::end_page();
     $r->print(<<ENDDOCUMENT);
-<html>
-<head>
-<title>The LearningOnline Network with CAPA</title>
-  <meta HTTP-EQUIV="Refresh" CONTENT="5; url=/adm/chatfetch?lastid=$lastid">
-</head>
-<body bgcolor="#FFFFFF">
-<script>
-parent.chatout.document.writeln('$newstuff');
+$start_page
+<script type="text/javascript">
+parent.chatout.document.writeln('$header$newstuff');
 parent.chatout.scroll(0,10000000);
 </script>
+$grouptitle
 $participant_output
-</body>
-</html>
+$end_page
 ENDDOCUMENT
     return OK;
-} 
+}
+
+sub get_seeid_status {
+    my $crs='/'.$env{'request.course.id'};
+    my $seeid;
+    if (exists($env{'form.group'})) {
+        $seeid = &Apache::lonnet::allowed('rci',$crs.'/'.$env{'form.group'});
+    } else {
+        if ($env{'request.course.sec'}) {
+            $crs.='_'.$env{'request.course.sec'};
+        }
+        $crs=~s/\_/\//g;
+        $seeid=&Apache::lonnet::allowed('rin',$crs);
+    }
+    return $seeid;
+}
+
+sub blockstatus {
+    my ($blocked,$output);
+    my %setters;
+    my ($startblock,$endblock) = &Apache::loncommon::blockcheck(\%setters,'chat');
+    if ($startblock && $endblock) {
+        $blocked = 1;
+        my $endblocktime = &Apache::lonlocal::locallocaltime($endblock);
+        $output .= &mt('Chat Room will be unavailable to you until [_1] because communication is blocked in one or more of your courses:',$endblocktime).'<br /><br />';
+        foreach my $course (keys(%setters)) {
+            my %courseinfo=&Apache::lonnet::coursedescription($course);
+            for (my $i=0; $i<@{$setters{$course}{staff}}; $i++) {
+                my ($uname,$udom) = @{$setters{$course}{staff}[$i]};
+                my $fullname = &Apache::loncommon::plainname($uname,$udom);
+                my ($openblock,$closeblock) = @{$setters{$course}{times}[$i]};
+                $openblock = &Apache::lonlocal::locallocaltime($openblock);
+                $closeblock= &Apache::lonlocal::locallocaltime($closeblock);
+                $output .= &mt('Block for [_1] starts: [_2], ends [_3], set by: [_4]<br />',$courseinfo{'description'},$openblock,$closeblock,$fullname);
+            }
+        }
+    }
+    return ($blocked,$output);
+}
 
 1;
 __END__