--- loncom/interface/lonnavmaps.pm	2002/10/17 19:25:27	1.84
+++ loncom/interface/lonnavmaps.pm	2002/10/24 18:38:26	1.85
@@ -2,7 +2,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.84 2002/10/17 19:25:27 bowersj2 Exp $
+# $Id: lonnavmaps.pm,v 1.85 2002/10/24 18:38:26 bowersj2 Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -890,7 +890,7 @@ sub new_handle {
           $res->TRIES_LEFT         => 'navmap.open.gif',
           $res->INCORRECT          => 'navmap.wrong.gif',
           $res->OPEN               => 'navmap.open.gif',
-          $res->ATTEMPTED          => '' );
+          $res->ATTEMPTED          => 'navmap.open.gif' );
 
     my %iconAltTags = 
         ( 'navmap.correct.gif' => 'Correct',
@@ -925,7 +925,7 @@ sub new_handle {
 
     # Begin the HTML table
     # four cols: resource + indent, chat+feedback, icon, text string
-    $r->print('<table cellspacing="0" cellpadding="3" width="100%" border="0" bgcolor="#FFFFFF">' ."\n");
+    $r->print('<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n");
 
     my $condition = 0;
     if ($ENV{'form.condition'}) {
@@ -1218,7 +1218,7 @@ sub new_handle {
 
                 my $discussionHTML = ""; my $feedbackHTML = "";
 
-                # SECOND COL: Is there text or feedback?
+                # SECOND COL: Is there text, feedback, errors??
                 if ($curRes->hasDiscussion()) {
                     $discussionHTML = $linkopen .
                         '<img border="0" src="/adm/lonMisc/chat.gif" />' .
@@ -1473,7 +1473,7 @@ sub timeToHumanString {
         # Less then 5 days away, display day of the week and
         # HH:MM
         if ( $delta < $day * 5 ) {
-            my $timeStr = strftime("%A at %I:%M %P", localtime($time));
+            my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
             $timeStr =~ s/12:00 am/midnight/;
             $timeStr =~ s/12:00 pm/noon/;
             return ($inPast ? "last " : "next ") .
@@ -2270,7 +2270,9 @@ These are methods that help you retrieve
 
 # These info functions can be used directly, as they don't return
 # resource information.
+sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
 sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
+sub from { my $self=shift; return $self->navHash("from_", 1); }
 sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
 sub kind { my $self=shift; return $self->navHash("kind_", 1); }
 sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
@@ -2554,7 +2556,7 @@ sub hasDiscussion {
 
 sub getFeedback {
     my $self = shift;
-    return $self->{NAV_MAP}->getFeedback($self->symb());
+    return $self->{NAV_MAP}->getFeedback($self->src());
 }
 
 =pod
@@ -2884,20 +2886,18 @@ sub status {
 
 =over 4
 
-=item * B<getNext>(): Gets the next resource in the navmap after this one.
+=item * B<getNext>($alreadySeenHashRef): Retreive an array of the possible next resources after this one. Always returns an array, even in the one- or zero-element case. The "alreadySeenHashRef" is an optional parameter that can be passed in to the method. If $$alreadySeenHashRef{$res->id()} is true in that hash, getNext will not return it in the list. In other words, you can use it to suppress resources you've already seen in the getNext method directly.
 
-=cut
+=item * B<getPrevious>($alreadySeenHashRef): Retreive an array of the possible previous resources from this one. Always returns an array, even in the one- or zero-element case. $alreadySeenHashRef is the same as in getNext.
 
-# For the simple single-link case, to get from a resource to the next
-# resource, you need to look up the "to_" link in the nav hash, then
-# follow that with the "goesto_" link.
+=cut
 
 sub getNext {
     my $self = shift;
     my $alreadySeenHash = shift;
     my @branches;
     my $to = $self->to();
-    foreach my $branch ( split(/\,/, $to) ) {
+    foreach my $branch ( split(/,/, $to) ) {
         my $choice = $self->{NAV_MAP}->getById($branch);
         my $next = $choice->goesto();
         $next = $self->{NAV_MAP}->getById($next);
@@ -2913,6 +2913,28 @@ sub getNext {
     }
     return \@branches;
 }
+
+sub getPrevious {
+    my $self = shift;
+    my @alreadySeen = shift;
+    my @branches;
+    my $from = $self->from();
+    foreach my $branch ( split /,/, $from) {
+        my $choice = $self->{NAV_MAP}->getById($branch);
+        my $prev = $choice->comesfrom();
+        $prev = $self->{NAV_MAP}->getById($prev);
+
+        # Skip it if we've already seen it or the user doesn't have
+        # browse privs
+        my $browsePriv = &Apache::lonnet::allowed('bre', $self->src);
+        if (!defined($alreadySeenHash) ||
+            !defined($alreadySeenHash->{$next->{ID}}) ||
+            ($browsePriv ne '2' && $browsePriv ne 'F')) {
+            push @branches, $next;
+        }
+    }
+    return \@branches;
+}
 
 =pod