--- loncom/interface/lonwhatsnew.pm	2006/01/13 01:18:44	1.50
+++ loncom/interface/lonwhatsnew.pm	2006/03/04 05:59:01	1.51
@@ -1,5 +1,5 @@
 #
-# $Id: lonwhatsnew.pm,v 1.50 2006/01/13 01:18:44 raeburn Exp $
+# $Id: lonwhatsnew.pm,v 1.51 2006/03/04 05:59:01 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -712,7 +712,6 @@ sub getitems {
     # force retrieve Resource to seed the part id cache we'll need it later
     my @allres=$navmap->retrieveResources(undef,
                      sub {if ($_[0]->is_problem) { $_[0]->parts();} return 1;});
-    my %lastreadtime;
     my %resourcetracker;
     my $discussiontime;
 
@@ -721,17 +720,6 @@ sub getitems {
         &checkversions($cdom,$crs,$navmap,$changed,$starttime);
     }
 
-    if ($$show{'coursediscussion'}) {   
-        my %lastread = &Apache::lonnet::dump('nohist_'.
-                        $env{'request.course.id'}.'_discuss',
-                        $env{'user.domain'},$env{'user.name'},'lastread');
-        foreach my $key (keys(%lastread)) {
-            my $newkey = $key;
-            $newkey =~ s/_lastread$//;
-            $lastreadtime{$newkey} = $lastread{$key};
-        }
-    }
- 
     if ($$show{'abovethreshold'}) {
         %resourcetracker =  &Apache::lonnet::dump('nohist_resourcetracker',
                                                                    $cdom,$crs);
@@ -752,8 +740,8 @@ sub getitems {
 
 # Check if there are unread discussion postings
         if ($$show{'coursediscussion'}) {
-            &check_discussions($cdom,$crs,$resource,$symb,$ressymb,$title,
-                                                      $newdiscussions,$unread);
+            &check_discussions($resource,$symb,$ressymb,$title,
+			       $newdiscussions,$unread,$countunread);
         }
 
 # Check for ungraded problems
@@ -776,73 +764,26 @@ sub getitems {
         }
 
     }
-    my $hasdiscussion = @{$newdiscussions};
-    if ($$show{'coursediscussion'} && $hasdiscussion) { # Get time of last post; 
-        $discussiontime = $navmap->{DISCUSSION_TIME};
-        foreach my $ressymb (@{$newdiscussions}) {
-            $$unread{$ressymb}{'lastpost'} = $$discussiontime{$ressymb};
-        }
-        if ($countunread eq 'on') { #Get count of unread postings for each resource 
-            my $discussiondata = $navmap->get_discussion_data();
-            foreach my $ressymb (@{$newdiscussions}) {
-                &get_discussions($cdom,$crs,$discussiondata,$ressymb,
-                                                       $unread,\%lastreadtime);
-            }
-        }
-    }
 }
 
 sub check_discussions {
-    my ($cdom,$crs,$resource,$symb,$ressymb,$title,$newdiscussions,
-                                                                 $unread) = @_;
-    if ($resource->hasDiscussion()) {
-        %{$$unread{$ressymb}} = ();
-        $$unread{$ressymb}{'title'} = $title;
-        $$unread{$ressymb}{'symb'} = $symb;
-        push(@{$newdiscussions}, $ressymb);
-    }
-}
+    my ($resource,$symb,$ressymb,$title,$newdiscussions,$unread,
+	$countunread) = @_;
 
-sub get_discussions {
-    my ($cdom,$crs,$discussiondata,$ressymb,$unread,$lastreadtime) = @_;
-    my $prevread = 0;
-    my $unreadcount = 0;
-    if (defined($$lastreadtime{$ressymb})) {
-        $prevread = $$lastreadtime{$ressymb};
-    }
-    my $version = $$discussiondata{'version:'.$ressymb};
-    if ($version) {
-        my $hiddenflag = 0;
-        my $deletedflag = 0;
-        my ($hidden,$deleted);
-        for (my $id=$version; $id>0; $id--) {
-            my $vkeys=$$discussiondata{$id.':keys:'.$ressymb};
-            my @keys=split(/:/,$vkeys);
-            if (grep/^hidden$/,@keys) {
-                unless ($hiddenflag) {
-                    $hidden = $$discussiondata{$id.':'.$ressymb.':hidden'};
-                    $hiddenflag = 1;
-                }
-            } elsif (grep/^deleted$/,@keys) {
-                unless ($deletedflag) {
-                    $deleted = $$discussiondata{$id.':'.$ressymb.':deleted'};
-                    $deletedflag = 1;
-                }
-            } else {
-                unless (($hidden =~/\.$id\./) || ($deleted =~/\.$id\./)) {
-                    if ($prevread <$$discussiondata{$id.':'.$ressymb.':timestamp'}) {
-                        $unreadcount ++;
-                        $$unread{$ressymb}{$unreadcount} = $id.': '.
-                                 $$discussiondata{$id.':'.$ressymb.':subject'};
-                    }
-                }
-            }
-        }
-        $$unread{$ressymb}{'unreadcount'} = $unreadcount;
+    if (!$resource->hasDiscussion()) { return; }
+
+    %{$$unread{$ressymb}} = ();
+    $$unread{$ressymb}{'title'} = $title;
+    $$unread{$ressymb}{'symb'} = $symb;
+    push(@{$newdiscussions}, $ressymb);
+    
+    $$unread{$ressymb}{'lastpost'} = $resource->last_post_time();
+    
+    if ($countunread eq 'on') {
+	$$unread{$ressymb}{'unreadcount'} = $resource->unread_discussion();
     }
 }
 
-
 sub check_handgraded {
     my ($resource,$symb,$title,$cdom,$cnum,$ungraded,$tograde) = @_;
     if ($resource->is_problem()) {