--- loncom/lonnet/perl/lonnet.pm	2002/10/14 15:33:26	1.297
+++ loncom/lonnet/perl/lonnet.pm	2002/11/18 15:16:35	1.301
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.297 2002/10/14 15:33:26 matthew Exp $
+# $Id: lonnet.pm,v 1.301 2002/11/18 15:16:35 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -77,8 +77,8 @@ use Apache::File;
 use LWP::UserAgent();
 use HTTP::Headers;
 use vars 
-qw(%perlvar %hostname %homecache %badServerCache %hostip %spareid %hostdom 
-   %libserv %pr %prp %metacache %packagetab 
+qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom 
+   %libserv %pr %prp %metacache %packagetab %titlecache 
    %courselogs %accesshash $processmarker $dumpcount 
    %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
 use IO::Socket;
@@ -593,6 +593,59 @@ sub idput {
 
 # ------------------------------------- Find the section of student in a course
 
+sub getsection {
+    my ($udom,$unam,$courseid)=@_;
+    $courseid=~s/\_/\//g;
+    $courseid=~s/^(\w)/\/$1/;
+    my %Pending; 
+    my %Expired;
+    #
+    # Each role can either have not started yet (pending), be active, 
+    #    or have expired.
+    #
+    # If there is an active role, we are done.
+    #
+    # If there is more than one role which has not started yet, 
+    #     choose the one which will start sooner
+    # If there is one role which has not started yet, return it.
+    #
+    # If there is more than one expired role, choose the one which ended last.
+    # If there is a role which has expired, return it.
+    #
+    foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
+                        &homeserver($unam,$udom)))) {
+        my ($key,$value)=split(/\=/,$_);
+        $key=&unescape($key);
+        next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
+        my $section=$1;
+        if ($key eq $courseid.'_st') { $section=''; }
+        my ($dummy,$end,$start)=split(/\_/,&unescape($value));
+        my $now=time;
+        if (defined($end) && ($now > $end)) {
+            $Expired{$end}=$section;
+            next;
+        }
+        if (defined($start) && ($now < $start)) {
+            $Pending{$start}=$section;
+            next;
+        }
+        return $section;
+    }
+    #
+    # Presumedly there will be few matching roles from the above
+    # loop and the sorting time will be negligible.
+    if (scalar(keys(%Pending))) {
+        my ($time) = sort {$a <=> $b} keys(%Pending);
+        return $Pending{$time};
+    } 
+    if (scalar(keys(%Expired))) {
+        my @sorted = sort {$a <=> $b} keys(%Expired);
+        my $time = pop(@sorted);
+        return $Expired{$time};
+    }
+    return '-1';
+}
+
 sub usection {
     my ($udom,$unam,$courseid)=@_;
     $courseid=~s/\_/\//g;
@@ -1050,7 +1103,7 @@ sub devalidate {
     if ($cid) {
 	my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
         my $status=
-	    &del('nohist_calculatedsheet',
+	    &del('nohist_calculatedsheets',
 		 [$key.'studentcalc'],
 		 $ENV{'course.'.$cid.'.domain'},
 		 $ENV{'course.'.$cid.'.num'})
@@ -1749,7 +1802,9 @@ sub allowed {
 
     if ($priv eq 'bre') {
         my $copyright=&metadata($uri,'copyright');
-	if ($copyright eq 'public') { return 'F'; }
+	if (($copyright eq 'public') && (!$ENV{'request.course.id'})) { 
+           return 'F'; 
+        }
         if ($copyright eq 'priv') {
             $uri=~/([^\/]+)\/([^\/]+)\//;
 	    unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
@@ -3043,6 +3098,33 @@ sub metadata_generate_part0 {
     }
 }
 
+# ------------------------------------------------- Get the title of a resource
+
+sub gettitle {
+    my $urlsymb=shift;
+    my $symb=&symbread($urlsymb);
+    unless ($symb) {
+	unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
+        return &metadata($urlsymb,'title'); 
+    }
+    if ($titlecache{$symb}) { return $titlecache{$symb}; }
+    my ($map,$resid,$url)=split(/\_\_\_/,$symb);
+    my $title='';
+    my %bighash;
+    if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+                            &GDBM_READER(),0640)) {
+        my $mapid=$bighash{'map_pc_'.&clutter($map)};
+        $title=$bighash{'title_'.$mapid.'.'.$resid};
+        untie %bighash;
+    }
+    if ($title) {
+        $titlecache{$symb}=$title;
+        return $title;
+    } else {
+	return &metadata($urlsymb,'title');
+    }
+}
+    
 # ------------------------------------------------- Update symbolic store links
 
 sub symblist {
@@ -3395,6 +3477,7 @@ BEGIN {
 	 $hostname{$id}=$name;
 	 $hostdom{$id}=$domain;
 	 $hostip{$id}=$ip;
+	 $iphost{$ip}=$id;
 	 if ($domdescr) { $domaindescription{$domain}=$domdescr; }
 	 if ($role eq 'library') { $libserv{$id}=$name; }
        } else {