--- loncom/interface/lonchatfetch.pm	2002/09/16 20:15:10	1.6
+++ loncom/interface/lonchatfetch.pm	2013/07/22 18:06:51	1.39
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Chat Fetching
 #
-# $Id: lonchatfetch.pm,v 1.6 2002/09/16 20:15:10 www Exp $
+# $Id: lonchatfetch.pm,v 1.39 2013/07/22 18:06:51 bisitz Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -29,114 +29,220 @@
 package Apache::lonchatfetch;
 
 use strict;
-use Apache::Constants qw(:common);
+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;
 
-    my $loaderror=&Apache::lonnet::overloaderror($r);
-    if ($loaderror) { return $loaderror; }
-    $loaderror=
-       &Apache::lonnet::overloaderror($r,
-         $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
-    if ($loaderror) { return $loaderror; }
+    &Apache::loncommon::get_unprocessed_cgi($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('plc',$env{'request.course.id'}.
+             ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
+        ) {
+        return HTTP_NOT_ACCEPTABLE;
+    }
 
-    $r->content_type('text/html');
+    &Apache::loncommon::content_type($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",$chome));
-    my ($lastid)=($entries[$#entries]=~/^(\w+)/);
-    my ($thentime,$idnum)=split(/\_/,$lastid);
+       &Apache::lonnet::reply(
+        "chatretr:$cdom:$cnum:$env{'user.domain'}:$env{'user.name'}:$group",
+        $chome));
+# Figure out what the last valid entry-id is
+    my ($lastid,$thentime,$idnum);
+    foreach 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; 
-       $newstuff='<html><body bgcolor="#FFFFFF">';
-    }
-    foreach (@entries) {
-	if ($include) {
-            my ($id,$msg)=split(/\:/,&Apache::lonnet::unescape($_));
-            chomp($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;
-	    $contrib=&Apache::lontexconvert::msgtexconverted($contrib);
-            $contrib=~s/\n/ /g;
-            $contrib=~s/\'/\&\#39\;/g;
-            my $sender='';
-            if ($seeid) {
-               $sender=&Apache::loncommon::plainname($snum,$sdom);
-               my $nick=&Apache::loncommon::nickname($snum,$sdom);
-               if (($nick) && ($nick ne $sender)) {
-		   $sender.=' '.$nick;
-               }
-	       if ($anon) { $sender.=' [Anon]' };
-            } elsif (!$anon) {
-               $sender=&Apache::loncommon::nickname($snum,$sdom);
-            } else {
-		$sender=&Apache::loncommon::screenname($snum,$sdom);
-                unless ($sender) { $sender="Anonymous"; }
+    unless ($env{'form.lastid'}) { 
+	$include=1; 
+	$header = 
+	    &Apache::loncommon::start_page(undef,undef,
+					   {'only_body' => 1,
+					    'bgcolor'   => '#FFFFFF',
+					    'js_ready'  => 1,});
+    }
+    my @participants=();
+    foreach my $entry (@entries) {
+	my ($id,$msg,$udom)=split(/\:/,&unescape($entry));
+ 	if ($id eq 'active_participant') {
+           chomp($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(/\:/,
+					     &unescape($msg));
+	    $contrib=&unescape($contrib);
+	    &Apache::lonfeedback::newline_to_br(\$contrib);
+	    ($contrib,my $errors)=&Apache::lontexconvert::msgtexconverted($contrib);
+            if ($errors) {
+                $contrib.=' <span class="LC_error">'
+                         .&mt('(Message not fully displayed due to incorrect embedded TeX.)')
+                         .'</span>';
             }
-            $sender=~s/\'/\"/g;
-            my $color=$sender;
-            $color=~tr/a-j/0-9/;
-            $color=~tr/A-J/0-9/;
-            $color=~tr/k-t/0-9/;
-            $color=~tr/K-T/0-9/;
-            $color=~tr/u-z/0-5/;
-            $color=~tr/U-Z/0-5/;
-            $color=~s/\D//g;
-            $color=substr($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>'.
-                       $sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
-                       $contrib."</font><br>";
-            $bottomid=$id;
-        } else {
-            $_=~/^(\w+)/;
-            if ($1 eq $ENV{'form.lastid'}) { $include=1; }
-        }
+	    if ($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;
+	    my $sender='';
+	    if ($seeid) {
+		$sender=&Apache::loncommon::plainname($snum,$sdom);
+		my $nick=&Apache::loncommon::nickname($snum,$sdom);
+		if (($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=&mt("Anonymous"); }
+	    }
+	    $sender=~s/\'/\&\#39\;/g;
+	    my $color=$sender;
+	    $color=~tr/a-j/0-9/;
+	    $color=~tr/A-J/0-9/;
+	    $color=~tr/k-t/0-9/;
+	    $color=~tr/K-T/0-9/;
+	    $color=~tr/u-z/0-5/;
+	    $color=~tr/U-Z/0-5/;
+	    $color=~s/\D//g;
+	    $color=substr($color,0,6);
+	    my $timestamp=localtime($msgtime);
+	    my ($mhour,$mmin,$msec)=($timestamp=~/(\d\d)\:(\d\d)\:(\d\d)/);
+	    $newstuff.='<span style="color:#'.$color.'"><a name="LC_'.$id.'"></a><b>'.
+		$sender.'</b> ('.$mhour.':'.$mmin.':'.$msec.'): '.
+		$contrib."</span><br />";
+	    $bottomid='LC_'.$id;
+	} else {
+	    $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>
-</body>
-</html>
+$grouptitle
+$participant_output
+$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);
+                $output .= &mt('Block for [_1] starts: [_2], ends [_3], set by: [_4]',$courseinfo{'description'},$openblock,$closeblock,$fullname).'<br />';
+            }
+        }
+    }
+    return ($blocked,$output);
+}
 
 1;
 __END__