--- loncom/interface/lonfeedback.pm	2003/11/03 20:34:54	1.65
+++ loncom/interface/lonfeedback.pm	2004/04/28 23:59:53	1.79
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Feedback
 #
-# $Id: lonfeedback.pm,v 1.65 2003/11/03 20:34:54 www Exp $
+# $Id: lonfeedback.pm,v 1.79 2004/04/28 23:59:53 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,24 +25,7 @@
 #
 # http://www.lon-capa.org/
 #
-# (Internal Server Error Handler
-#
-# (Login Screen
-# 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14,
-# 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9 Gerd Kortemeyer)
-#
-# 3/1/1 Gerd Kortemeyer)
-#
-# 3/1,2/3,2/5,2/6,2/8 Gerd Kortemeyer
-# 2/9 Guy Albertelli
-# 2/10 Gerd Kortemeyer
-# 2/13 Guy Albertelli
-# 7/25 Gerd Kortemeyer
-# 7/26 Guy Albertelli
-# 7/26,8/10,10/1,11/5,11/6,12/27,12/29 Gerd Kortemeyer
-# YEAR=2002
-# 1/1,1/16 Gerd Kortemeyer
-#
+###
 
 package Apache::lonfeedback;
 
@@ -55,6 +38,11 @@ use Apache::lonlocal;
 
 sub list_discussion {
     my ($mode,$status,$symb)=@_;
+#    &Apache::lonnet::logthis("status is $status");
+    if (!($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER'
+	  || $status eq 'OPEN')) {
+	return '';
+    }
     my $discussiononly=0;
     if ($mode eq 'board') { $discussiononly=1; }
     unless ($ENV{'request.course.id'}) { return ''; }
@@ -67,21 +55,89 @@ sub list_discussion {
 	$symb=&Apache::lonnet::symbread();
     }
     unless ($symb) { return ''; }
+
+    my %dischash = &Apache::lonnet::restore($symb,'nohist_'.$ENV{'request.course.id'}.'_discuss',$ENV{'user.domain'},$ENV{'user.name'});
+    my %readids = ();
+    my $showonlyunread;
+    my $prevread = 0;
+
+    foreach my $key (keys %dischash) {
+        if ($key eq 'lastread') {
+            $prevread = $dischash{$key};
+        }
+        if ($key eq 'showonlyunread') {
+            $showonlyunread = $dischash{$key};
+        } else {
+            if ($dischash{$key} eq 'read') {
+                $readids{$key} = 1;
+            }
+        }
+    }
+
     my $seeid=&Apache::lonnet::allowed('rin',$crs);
-    my $viewgrades=&Apache::lonnet::allowed('vgr',$crs);
-    my %discussionitems=();
-    my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
+    my $viewgrades=(&Apache::lonnet::allowed('vgr',$crs)
+	&& ($symb=~/\.(problem|exam|quiz|assess|survey|form)$/));
+    my @discussionitems=();
+    # backward compatibility (bulletin boards used to be 'wrapped')
+    my $ressymb=$symb;
+    if ($mode eq 'board') {
+	$ressymb=~s|(bulletin___\d+___)|$1adm/wrapper|;
+    }
+    my %contrib=&Apache::lonnet::restore($ressymb,$ENV{'request.course.id'},
 			  $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
 			  $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
+    my $visible=0;
+    my @depth=();
+    my @original=();
+    my @index=();
+    my @replies=();
+    my %alldiscussion=();
+    my $maxdepth=0;
+
+    my $target='';
+    unless ($ENV{'browser.interface'} eq 'textual' ||
+	    $ENV{'environment.remote'} eq 'off' ) {
+	$target='target="LONcom"';
+    }
+    
+    my $now = time;
+    my %discinfo = (
+                   'lastread' => $now,
+                   ); 
+    &Apache::lonnet::cstore(\%discinfo,$symb,'nohist_'.$ENV{'request.course.id'}.'_discuss',$ENV{'user.domain'},$ENV{'user.name'});
+
     if ($contrib{'version'}) {
 	for (my $id=1;$id<=$contrib{'version'};$id++) {
 	    my $idx=$id;
 	    my $hidden=($contrib{'hidden'}=~/\.$idx\./);
 	    my $deleted=($contrib{'deleted'}=~/\.$idx\./);
+	    my $origindex='0.';
+	    if (($contrib{$idx.':replyto'}) && ($ENV{'environment.threadeddiscussion'})) {
+# this is a follow-up message
+		$original[$idx]=$original[$contrib{$idx.':replyto'}];
+		$depth[$idx]=$depth[$contrib{$idx.':replyto'}]+1;
+		$origindex=$index[$contrib{$idx.':replyto'}];
+		if ($depth[$idx]>$maxdepth) { $maxdepth=$depth[$idx]; }
+	    } else {
+# this is an original message
+		$original[$idx]=0;
+		$depth[$idx]=0;
+	    }
+	    if ($replies[$depth[$idx]]) {
+		$replies[$depth[$idx]]++;
+	    } else {
+		$replies[$depth[$idx]]=1;
+	    }
 	    unless ((($hidden) && (!$seeid)) || ($deleted)) {
+		$visible++;
 		my $message=$contrib{$idx.':message'};
 		$message=~s/\n/\<br \/\>/g;
 		$message=&Apache::lontexconvert::msgtexconverted($message);
+                my $subject=$contrib{$idx.':subject'};
+                if (defined($subject)) {
+                    $subject=~s/\n/\<br \/\>/g;
+                    $subject=&Apache::lontexconvert::msgtexconverted($subject);
+                }
 		if ($contrib{$idx.':attachmenturl'}) {
 		    my ($fname,$ft)
                         =($contrib{$idx.':attachmenturl'}=~/\/(\w+)\.(\w+)$/);
@@ -116,52 +172,123 @@ sub list_discussion {
 			if ($seeid) {
 			    if ($hidden) {
 				$sender.=' <a href="/adm/feedback?unhide='.
-				    $symb.':::'.$idx.'">'.&mt('Make Visible').'</a>';
+				    $ressymb.':::'.$idx.'">'.&mt('Make Visible').'</a>';
 			    } else {
 				$sender.=' <a href="/adm/feedback?hide='.
-				    $symb.':::'.$idx.'">'.&mt('Hide').'</a>';
+				    $ressymb.':::'.$idx.'">'.&mt('Hide').'</a>';
 			    }                     
 			    $sender.=' <a href="/adm/feedback?deldisc='.
-				$symb.':::'.$idx.'">'.&mt('Delete').'</a>';
-			}
-			if (&Apache::lonnet::allowed('pch',
-				   $ENV{'request.course.id'}.
-	($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
-			    $sender.=' <a href="/adm/feedback?replydisc='.
-				$symb.':::'.$idx.'">'.&mt('Reply').'</a>';
+				$ressymb.':::'.$idx.'">'.&mt('Delete').'</a>';
 			}
 		    } else {
 			if ($screenname) {
 			    $sender='<i>'.$screenname.'</i>';
 			}
 		    }
+		    if (&Apache::lonnet::allowed('pch',
+						 $ENV{'request.course.id'}.
+						 ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
+			$sender.=' <a href="/adm/feedback?replydisc='.
+			    $ressymb.':::'.$idx.'" '.$target.'>'.&mt('Reply').'</a>';
+		    }
 		    my $vgrlink;
+                    my $ctlink;
+                    if ($readids{$idx} == 1) {
+                        $ctlink = '<b>'.&mt('Mark unread').'?</b>&nbsp;'.
+                            '<input type="checkbox" name="'.
+                            'postunread_'.$idx.'" />';
+                    } else {
+                        $ctlink = '<b>'.&mt('Mark read').'?</b>&nbsp;'.
+                            '<input type="checkbox" name="'.
+                            'postread_'.$idx.'" />';
+                    }
 		    if ($viewgrades) {
 			$vgrlink=&Apache::loncommon::submlink('Submissions',
             $contrib{$idx.':sendername'},$contrib{$idx.':senderdomain'},$symb);
 		    }
-		    $discussionitems{$idx}='<p><b>'.$sender.'</b> '.$vgrlink.' ('.
-			localtime($contrib{$idx.':timestamp'}).
-			'):<blockquote>'.$message.
-			'</blockquote></p>';
-	        }
-	    } 
+#figure out at what position this needs to print
+		    my $thisindex=$idx;
+		    if ($ENV{'environment.threadeddiscussion'}) {
+			$thisindex=$origindex.substr('00'.$replies[$depth[$idx]],-2,2);	
+		    }
+		    $alldiscussion{$thisindex}=$idx;
+		    $index[$idx]=$thisindex;
+                    my $posttime = $contrib{$idx.':timestamp'};
+                    my $spansize = 2;
+                    $discussionitems[$idx]='<p><table border="0" width="100%"><tr>';
+                    if ($prevread > 0 && $prevread < $posttime) {
+                        $discussionitems[$idx] .= '<td align="left" bgcolor="#FFFFFF"><font color="#FF0000">NEW</font></td>';
+                        $spansize ++;
+                    }
+                    $discussionitems[$idx] .= '<td align ="left">&nbsp;&nbsp;'.
+                        '<b>'.$subject.'</b>&nbsp;&nbsp;'.
+                        $sender.'</b> '.$vgrlink.' ('.
+                        localtime($posttime).')'.
+                        '</td><td align="right">&nbsp;&nbsp;'.
+                        $ctlink.'</td></tr>';
+                    if ($showonlyunread && $readids{$idx}) {
+                        $discussionitems[$idx] .= '<tr><td colspan="'.$spansize.'" align="right"><i><font size="-1">Check "Show all posts?" or "Mark unread?", then "Save read settings" to display message</font></i></td></tr></table>';
+                    } else {
+                        $discussionitems[$idx] .= '</table><blockquote>'.$message.'</blockquote></p>';
+                    }
+                }
+            }
 	}
     }
-    my $discussion='<hr />';
-    foreach (sort { $a <=> $b } keys %discussionitems) {
-	$discussion.=$discussionitems{$_};
+    my $discussion='';
+    if ($visible) {
+# Print a the discusssion
+        $discussion .= '<form name="readchoices" method="post" action="/adm/feedback?chgreads='.$symb.'">';
+	$discussion.='<table bgcolor="#AAAAAA" cellpadding="2" cellspacing="2" border="0">';
+	if ($visible>2) {
+	    my $colspan=$maxdepth+1;
+my $showoption = '<tr><td align="right" bgcolor="#FFFFFF" colspan="'.$colspan.'">';
+            my $showflag = 'all';
+            if ($showonlyunread) {
+                $showoption .= '<b>Show all posts?</b><input type="checkbox"
+name="allposts" value="1"></td></tr>';
+            } else {
+                $showoption .= '<b>Show only unread posts?</b><input type="checkbox" name="onlyunread" value="1"></td></tr>';
+            }
+            $discussion.=$showoption;
+	    $discussion.='<tr><td bgcolor="DDDDBB" colspan="'.$colspan.'">'.
+            '<table border="0" width="100%" bgcolor="#DDDDBB"><tr><td align="left">'.
+            '<a href="/adm/feedback?threadedon='.$symb.'">'.&mt('Threaded View').'</a>&nbsp;&nbsp;'.
+            '<a href="/adm/feedback?threadedoff='.$symb.'">'.&mt('Chronological View').'</a>&nbsp;&nbsp;</td>'.
+            '<td align="right"><a href="/adm/feedback?markread='.$symb.'">'.&mt('Mark all read').'</a>&nbsp;&nbsp;'.
+            '<a href="/adm/feedback?markunread='.$symb.'">'.&mt('Mark all unread').'</a>&nbsp;&nbsp;'.
+            '</td></tr></table></td></tr>';
+	}
+
+	foreach (sort { $a <=> $b } keys %alldiscussion) {
+	    $discussion.="\n<tr>";
+	    my $thisdepth=$depth[$alldiscussion{$_}];
+	    for (1..$thisdepth) {
+		$discussion.='<td>&nbsp;&nbsp;&nbsp;</td>';
+	    }
+	    my $colspan=$maxdepth-$thisdepth+1;
+            $discussion.='<td  bgcolor="#CCCCCC" colspan="'.$colspan.'">'.
+                         $discussionitems[$alldiscussion{$_}].
+	                 '</td></tr>';
+	}
+        my $colspan=$maxdepth+1;
+        $discussion.='<tr><td bgcolor="#FFFFFF" align="right" colspan="'.
+        $colspan.'"><br /><input type="hidden" name="storereads" value="0">'.            '<input type="hidden" name="discsymb" value="'.$symb.'">'.
+        '<input type="button" name="readoptions" '.
+        'value="Save read settings" onClick="this.form.storereads.value=1;this.form.submit();"></td></tr>';
+        $discussion .= '</table><br /><br /></form>';
     }
     if ($discussiononly) {
 	$discussion.=(<<ENDDISCUSS);
 <form action="/adm/feedback" method="post" name="mailform" enctype="multipart/form-data">
 <input type="submit" name="discuss" value="Post Discussion" />
 <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
-<input type="hidden" name="symb" value="$symb" />
+<input type="hidden" name="symb" value="$ressymb" />
 <input type="hidden" name="sendit" value="true" />
 <br />
 <font size="1">Note: in anonymous discussion, your name is visible only to
 course faculty</font><br />
+<b>Title:</b>&nbsp;<input type="text" name="subject" value="" size="30" /><br /><br />
 <textarea name="comment" cols="60" rows="10" wrap="hard"></textarea>
 <p>
 Attachment (128 KB max size): <input type="file" name="attachment" />
@@ -169,7 +296,16 @@ Attachment (128 KB max size): <input typ
 </form>
 ENDDISCUSS
       $discussion.=&generate_preview_button();
-   }
+    } else {
+	if (&Apache::lonnet::allowed('pch',
+				   $ENV{'request.course.id'}.
+	($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
+			    $discussion.='<table bgcolor="#BBBBBB"><tr><td><a href="/adm/feedback?replydisc='.
+				$symb.':::" '.$target.'>'.
+				'<img src="/adm/lonMisc/chat.gif" border="0" />'.
+				&mt('Post Discussion').'</a></td></tr></table>';
+			}
+    }
    return $discussion;
 }
 
@@ -179,7 +315,24 @@ sub mail_screen {
                                           '','onLoad="window.focus();"');
   my $title=&Apache::lonnet::gettitle($feedurl);
   if (!$title) { $title = $feedurl; }
+  my $quote='';
+  my $subject = '';
+  if ($ENV{'form.replydisc'}) {
+      my ($symb,$idx)=split(/\:\:\:/,$ENV{'form.replydisc'});
+      my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
+					   $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
+					   $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
+      unless (($contrib{'hidden'}=~/\.$idx\./) || ($contrib{'deleted'}=~/\.$idx\./)) { 
+	  my $message=$contrib{$idx.':message'};
+	  $message=~s/\n/\<br \/\>/g;
+	  $quote='<blockquote>'.&Apache::lontexconvert::msgtexconverted($message).'</blockquote>';
+          if ($idx > 0) {
+              $subject = 'Re: '.$contrib{$idx.':subject'};
+          }
+      }
+  }
   my $latexHelp = Apache::loncommon::helpLatexCheatsheet();
+  my $send=&mt('Send');
   $r->print(<<ENDDOCUMENT);
 <html>
 <head>
@@ -234,11 +387,15 @@ $bodytag
 <form action="/adm/feedback" method="post" name="mailform"
 enctype="multipart/form-data">
 <input type="hidden" name="postdata" value="$feedurl" />
+<input type="hidden" name="replydisc" value="$ENV{'form.replydisc'}" />
 Please check at least one of the following feedback types:
 $options<hr />
+$quote
 <p>My question/comment/feedback:</p>
 <p>
 $latexHelp
+Title: <input type="text" name="subject" size="30" value="$subject" /></p>
+<p>
 <textarea name="comment" cols="60" rows="10" wrap="hard">
 </textarea></p>
 <p>
@@ -246,7 +403,7 @@ Attachment (128 KB max size): <input typ
 </p>
 <p>
 <input type="hidden" name="sendit" value="1" />
-<input type="button" value="Send Feedback" onClick='gosubmit();' />
+<input type="button" value="$send" onClick='gosubmit();' />
 </p>
 </form>
 ENDDOCUMENT
@@ -255,12 +412,13 @@ $r->print(&generate_preview_button().'</
 
 sub fail_redirect {
   my ($r,$feedurl) = @_;
+  if ($feedurl=~/^\/adm\//) { $feedurl.='?register=1' };
   $r->print (<<ENDFAILREDIR);
+<html>
 <head><title>Feedback not sent</title>
 <meta http-equiv="pragma" content="no-cache" />
 <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl" />
 </head>
-<html>
 <body bgcolor="#FFFFFF">
 <img align="right" src="/adm/lonIcons/lonlogos.gif" />
 <b>Sorry, no recipients  ...</b>
@@ -271,13 +429,14 @@ ENDFAILREDIR
 
 sub redirect_back {
   my ($r,$feedurl,$typestyle,$sendsomething,$sendposts,$status) = @_;
+  if ($feedurl=~/^\/adm\//) { $feedurl.='?register=1' };
   $r->print (<<ENDREDIR);
+<html>
 <head>
 <title>Feedback sent</title>
 <meta http-equiv="pragma" content="no-cache" />
 <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
 </head>
-<html>
 <body bgcolor="#FFFFFF" onLoad='if (window.name!="loncapaclient") { this.document.reldt.submit(); self.close(); }'>
 <img align="right" src="/adm/lonIcons/lonlogos.gif" />
 $typestyle
@@ -293,6 +452,7 @@ ENDREDIR
 sub no_redirect_back {
   my ($r,$feedurl) = @_;
   $r->print (<<ENDNOREDIR);
+<html>
 <head><title>Feedback not sent</title>
 <meta http-equiv="pragma" content="no-cache" />
 ENDNOREDIR
@@ -303,7 +463,6 @@ ENDNOREDIR
   
   $r->print (<<ENDNOREDIRTWO);
 </head>
-<html>
 <body bgcolor="#FFFFFF" onLoad='if (window.name!="loncapaclient") { self.close(); }'>
 <img align="right" src="/adm/lonIcons/lonlogos.gif" />
 <b>Sorry, no feedback possible on this resource  ...</b>
@@ -342,16 +501,17 @@ sub screen_header {
 	if (&Apache::lonnet::allowed('pch',
 				     $ENV{'request.course.id'}.
 				     ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
-	    $discussoptions='<input type="checkbox" name="discuss" onClick="this.form.anondiscuss.checked=false;" /> '.
+	    $discussoptions='<input type="checkbox" name="discuss" onClick="this.form.anondiscuss.checked=false;" '.
+		($ENV{'form.replydisc'}?' checked="1"':'').' /> '.
 		&mt('Contribution to course discussion of resource');
 	    $discussoptions.='<br /><input type="checkbox" name="anondiscuss" onClick="this.form.discuss.checked=false;" /> '.
 		&mt('Anonymous contribution to course discussion of resource').
 		' <i>('.&mt('name only visible to course faculty').')</i>';
       }
     }
-    if ($msgoptions) { $msgoptions='<h2>'.&mt('Sending Messages').'</h2>'.$msgoptions; }
+    if ($msgoptions) { $msgoptions='<h2><img src="/adm/lonMisc/feedback.gif" />'.&mt('Sending Messages').'</h2>'.$msgoptions; }
     if ($discussoptions) { 
-	$discussoptions='<h2>'.&mt('Discussion Contributions').'</h2>'.$discussoptions; }
+	$discussoptions='<h2><img src="/adm/lonMisc/chat.gif" />'.&mt('Discussion Contributions').'</h2>'.$discussoptions; }
     return $msgoptions.$discussoptions;
 }
 
@@ -509,7 +669,7 @@ sub send_msg {
 }
 
 sub adddiscuss {
-    my ($symb,$email,$anon,$attachmenturl)=@_;
+    my ($symb,$email,$anon,$attachmenturl,$subject)=@_;
     my $status='';
     if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'}.
         ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
@@ -522,9 +682,10 @@ sub adddiscuss {
 		                   $ENV{'environment.middlename'}.' '.
                                    $ENV{'environment.lastname'}.' '.
                                    $ENV{'enrironment.generation'},
-                 'attachmenturl'=> $attachmenturl);
+                 'attachmenturl'=> $attachmenturl,
+                 'subject'      => $subject);
     if ($ENV{'form.replydisc'}) {
-	$contrib{'replyto'}=$ENV{'form.replydisc'};
+	$contrib{'replyto'}=(split(/\:\:\:/,$ENV{'form.replydisc'}))[1];
     }
     if ($anon) {
 	$contrib{'anonymous'}='true';
@@ -562,7 +723,11 @@ sub show_preview {
     my $message=&clear_out_html($ENV{'form.comment'});
     $message=~s/\n/\<br \/\>/g;
     $message=&Apache::lontexconvert::msgtexconverted($message);
+    my $subject=&clear_out_html($ENV{'form.subject'});
+    $subject=~s/\n/\<br \/\>/g;
+    $subject=&Apache::lontexconvert::msgtexconverted($subject);
     $r->print('<table border="2"><tr><td>'.
+       '<b>Subject:</b> '.$subject.'<br /><br />'.
        $message.'</td></tr></table>');
 }
 
@@ -570,16 +735,18 @@ sub generate_preview_button {
     my $pre=&mt("Show Preview");
     return(<<ENDPREVIEW);
 <form name="preview" action="/adm/feedback?preview=1" method="post" target="preview">
+<input type="hidden" name="subject">
 <input type="hidden" name="comment" />
 <input type="button" value="$pre"
-onClick="this.form.comment.value=document.mailform.comment.value;this.form.submit();" />
+onClick="this.form.comment.value=document.mailform.comment.value;this.form.subject.value=document.mailform.subject.value;this.form.submit();" />
 </form>
 ENDPREVIEW
 }
+
 sub handler {
   my $r = shift;
   if ($r->header_only) {
-     $r->content_type('text/html');
+     &Apache::loncommon::content_type($r,'text/html');
      $r->send_http_header;
      return OK;
   }
@@ -587,11 +754,78 @@ sub handler {
 # --------------------------- Get query string for limited number of parameters
 
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
-         ['hide','unhide','deldisc','postdata','preview','replydisc']);
+#         ['hide','unhide','deldisc','postdata','preview','replydisc','threadedon','threadedoff']);
+         ['hide','unhide','deldisc','postdata','preview','replydisc','threadedon','threadedoff','markread','markunread','storereads','onlyunread','allposts','chgreads']);
+
+  if (($ENV{'form.markread'}) || ($ENV{'form.markunread'})) {
+# ----------------------------------------------------------------- Modify read/unread for all
+      &Apache::loncommon::content_type($r,'text/html');
+      $r->send_http_header;
+      my $symb=$ENV{'form.markread'}?$ENV{'form.markread'}:$ENV{'form.markunread'};
+      my $ressymb = $symb;
+      my ($map,$ind,$url)=&Apache::lonnet::decode_symb($symb);
+      $ressymb=~s|(bulletin___\d+___)|$1adm/wrapper|;
+      my %contrib=&Apache::lonnet::restore($ressymb,$ENV{'request.course.id'},
+                          $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
+                          $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
+      my %readinghash = ();
+                                                                                 
+      if ($contrib{'version'}) {
+          for (my $id=1;$id<=$contrib{'version'};$id++) {
+              my $msgid = $id.':message';
+              if (defined($contrib{$msgid})) {
+                  if ($ENV{'form.markread'}) {
+                      $readinghash{$id} = 'read';
+                  } else {
+                       $readinghash{$id} = 'unread';
+                  }
+              }
+          }
+          if ($ENV{'form.allposts'}) {
+              $readinghash{'showonlyunread'} = 0;
+          } elsif ($ENV{'form.onlyunread'}) {
+              $readinghash{'showonlyunread'} = 1;
+          }
+          &Apache::lonnet::cstore(\%readinghash,$symb,'nohist_'.$ENV{'request.course.id'}.'_discuss',$ENV{'user.domain'},$ENV{'user.name'});
+      }
+                                                                                 
+      &redirect_back($r,&Apache::lonnet::clutter($url),&mt('Changed reading status'),'0','0');
+      return OK;
+  } else {
+      my $symb = $ENV{'form.discsymb'};
+      my %readinghash = ();
+      my $chgcount = 0;
+      foreach my $key (keys %ENV) {
+          if ($key =~ m/^form\.postunread_(\d+)/) {
+              $readinghash{$1} = 'unread';
+              $chgcount ++;
+          } elsif ($key =~ m/^form\.postread_(\d+)/) {
+              $readinghash{$1} = 'read';
+              $chgcount ++;
+          }
+      }
+      if ($ENV{'form.allposts'}) {
+          $readinghash{'showonlyunread'} = 0;
+          $chgcount ++;
+      } elsif ($ENV{'form.onlyunread'}) {
+          $readinghash{'showonlyunread'} = 1;
+          $chgcount ++;
+      }
+                                                                                 
+      if ($chgcount > 0) {
+          &Apache::lonnet::cstore(\%readinghash,$symb,'nohist_'.$ENV{'request.course.id'}.'_discuss',$ENV{'user.domain'},$ENV{'user.name'});
+      }
+  }
 
-  if (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
+  if ($ENV{'form.chgreads'}) {
+      &Apache::loncommon::content_type($r,'text/html');
+      $r->send_http_header;
+      my ($map,$ind,$url)=&Apache::lonnet::decode_symb($ENV{'form.chgreads'});
+      &redirect_back($r,&Apache::lonnet::clutter($url),
+       &mt('Changed read status').'<br />','0','0');
+  } elsif (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
 # ----------------------------------------------------------------- Hide/unhide
-    $r->content_type('text/html');
+    &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
 
     my $entry=$ENV{'form.hide'}?$ENV{'form.hide'}:$ENV{'form.unhide'};
@@ -619,9 +853,23 @@ sub handler {
 
     &redirect_back($r,&Apache::lonnet::clutter($url),
        &mt('Changed discussion status').'<br />','0','0');
+  } elsif (($ENV{'form.threadedon'}) || ($ENV{'form.threadedoff'})) {
+      &Apache::loncommon::content_type($r,'text/html');
+      $r->send_http_header;
+      if ($ENV{'form.threadedon'}) {
+	  &Apache::lonnet::put('environment',{'threadeddiscussion' => 'on'});
+	  &Apache::lonnet::appenv('environment.threadeddiscussion' => 'on');
+      } else {
+ 	  &Apache::lonnet::del('environment',['threadeddiscussion']);
+	  &Apache::lonnet::delenv('environment\.threadeddiscussion');
+      }
+      my $symb=$ENV{'form.threadedon'}?$ENV{'form.threadedon'}:$ENV{'form.threadedoff'};
+      my ($map,$ind,$url)=&Apache::lonnet::decode_symb($symb);
+      &redirect_back($r,&Apache::lonnet::clutter($url),
+		     &mt('Changed discussion view mode').'<br />','0','0');
   } elsif ($ENV{'form.deldisc'}) {
 # --------------------------------------------------------------- Hide for good
-    $r->content_type('text/html');
+    &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
 
     my $entry=$ENV{'form.deldisc'};
@@ -648,6 +896,8 @@ sub handler {
        &mt('Changed discussion status').'<br />','0','0');
   } elsif ($ENV{'form.preview'}) {
 # -------------------------------------------------------- User wants a preview
+      $r->content_type('text/html');
+      $r->send_http_header;
       &show_preview($r);
   } else {
 # ------------------------------------------------------------- Normal feedback
@@ -657,7 +907,14 @@ sub handler {
   $feedurl=~s/^$ENV{'HTTP_HOST'}//;
   $feedurl=~s/\?.+$//;
 
-  my $symb=&Apache::lonnet::symbread($feedurl);
+  my $symb;
+  if ($ENV{'form.replydisc'}) {
+      $symb=(split(/\:\:\:/,$ENV{'form.replydisc'}))[0];
+      my ($map,$id,$url)=&Apache::lonnet::decode_symb($symb);
+      $feedurl=&Apache::lonnet::clutter($url);
+  } else {
+      $symb=&Apache::lonnet::symbread($feedurl);
+  }
   unless ($symb) {
       $symb=$ENV{'form.symb'};
       if ($symb) {
@@ -669,10 +926,13 @@ sub handler {
   if ($feedurl=~/\.(problem|exam|quiz|assess|survey|form)$/) {
       unless ($symb) { $goahead=0; }
   }
-
+  # backward compatibility (bulltin boards used to be 'wrapped')
+  if ($feedurl=~m|^/adm/wrapper/adm/.*/bulletinboard$|) {
+      $feedurl=~s|^/adm/wrapper||;
+  }
   if ($goahead) {
 # Go ahead with feedback, no ambiguous reference
-    $r->content_type('text/html');
+    &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
   
     if (
@@ -733,12 +993,14 @@ sub handler {
 
       my $numpost=0;
       if ($ENV{'form.discuss'}) {
-	  $typestyle.=&adddiscuss($symb,$message,0,$attachmenturl);
+          my $subject = &clear_out_html($ENV{'form.subject'});
+	  $typestyle.=&adddiscuss($symb,$message,0,$attachmenturl,$subject);
 	  $numpost++;
       }
 
       if ($ENV{'form.anondiscuss'}) {
-	  $typestyle.=&adddiscuss($symb,$message,1,$attachmenturl);
+          my $subject = &clear_out_html($ENV{'form.subject'});
+	  $typestyle.=&adddiscuss($symb,$message,1,$attachmenturl,$subject);
 	  $numpost++;
       }