--- loncom/lonnet/perl/lonnet.pm	2003/03/25 19:18:40	1.351
+++ loncom/lonnet/perl/lonnet.pm	2003/03/25 22:03:23	1.352
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.351 2003/03/25 19:18:40 www Exp $
+# $Id: lonnet.pm,v 1.352 2003/03/25 22:03:23 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -75,7 +75,7 @@ use vars
 qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom 
    %libserv %pr %prp %metacache %packagetab %titlecache 
    %courselogs %accesshash %userrolehash $processmarker $dumpcount 
-   %coursedombuf %coursehombuf %courseresdatacache 
+   %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache 
    %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);
 use IO::Socket;
 use GDBM_File;
@@ -1027,12 +1027,24 @@ sub log {
 }
 
 # ------------------------------------------------------------------ Course Log
+#
+# This routine flushes several buffers of non-mission-critical nature
+#
 
 sub flushcourselogs {
-    &logthis('Flushing course log buffers');
+    &logthis('Flushing log buffers');
+#
+# course logs
+# This is a log of all transactions in a course, which can be used
+# for data mining purposes
+#
+# It also collects the courseid database, which lists last transaction
+# times and course titles for all courseids
+#
+    my %courseidbuffer=();
     foreach (keys %courselogs) {
         my $crsid=$_;
-        if (&reply('log:'.$coursedombuf{$crsid}.':'.
+        if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
 		          &escape($courselogs{$crsid}),
 		          $coursehombuf{$crsid}) eq 'ok') {
 	    delete $courselogs{$crsid};
@@ -1043,9 +1055,26 @@ sub flushcourselogs {
                         " exceeded maximum size, deleting.</font>");
                delete $courselogs{$crsid};
             }
-        }        
+        }
+        if ($courseidbuffer{$coursehombuf{$crsid}}) {
+           $courseidbuffer{$coursehombuf{$crsid}}.='&'.
+			 &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
+        } else {
+           $courseidbuffer{$coursehombuf{$crsid}}=
+			 &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
+        }    
     }
-    &logthis('Flushing access logs');
+#
+# Write course id database (reverse lookup) to homeserver of courses 
+# Is used in pickcourse
+#
+    foreach (keys %courseidbuffer) {
+        &reply('courseidput:'.$hostdom{$_}.':'.$courseidbuffer{$_},$_);
+    }
+#
+# File accesses
+# Writes to the dynamic metadata of resources to get hit counts, etc.
+#
     foreach (keys %accesshash) {
         my $entry=$_;
         $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
@@ -1054,7 +1083,10 @@ sub flushcourselogs {
 	    delete $accesshash{$entry};
         }
     }
-    &logthis('Flushing role logs');
+#
+# Roles
+# Reverse lookup of user roles for course faculty/staff and co-authorship
+#
     foreach (keys %userrolehash) {
         my $entry=$_;
         my ($role,$uname,$udom,$runame,$rudom,$rsec)=
@@ -1073,10 +1105,13 @@ sub courselog {
     $what=time.':'.$what;
     unless ($ENV{'request.course.id'}) { return ''; }
     $coursedombuf{$ENV{'request.course.id'}}=
-       $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
+       $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
+    $coursenumbuf{$ENV{'request.course.id'}}=
        $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
     $coursehombuf{$ENV{'request.course.id'}}=
        $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
+    $coursedescrbuf{$ENV{'request.course.id'}}=
+       $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
     if (defined $courselogs{$ENV{'request.course.id'}}) {
 	$courselogs{$ENV{'request.course.id'}}.='&'.$what;
     } else {