--- loncom/interface/lonnavmaps.pm	2004/12/17 22:40:09	1.311
+++ loncom/interface/lonnavmaps.pm	2006/03/16 20:48:30	1.371
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.311 2004/12/17 22:40:09 albertel Exp $
+# $Id: lonnavmaps.pm,v 1.371 2006/03/16 20:48:30 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -30,6 +30,7 @@
 package Apache::lonnavmaps;
 
 use strict;
+use GDBM_File;
 use Apache::Constants qw(:common :http);
 use Apache::loncommon();
 use Apache::lonmenu();
@@ -38,6 +39,7 @@ use Apache::lonlocal;
 use Apache::lonnet;
 use POSIX qw (floor strftime);
 use Data::Dumper; # for debugging, not always 
+use Time::HiRes qw( gettimeofday tv_interval );
 
 # symbolic constants
 sub SYMB { return 1; }
@@ -55,6 +57,7 @@ my %statusIconMap =
      $resObj->CLOSED       => '',
      $resObj->OPEN         => 'navmap.open.gif',
      $resObj->CORRECT      => 'navmap.correct.gif',
+     $resObj->PARTIALLY_CORRECT      => 'navmap.partial.gif',
      $resObj->INCORRECT    => 'navmap.wrong.gif',
      $resObj->ATTEMPTED    => 'navmap.ellipsis.gif',
      $resObj->ERROR        => ''
@@ -79,21 +82,28 @@ my %colormap =
       $resObj->OPEN                   => '',
       $resObj->NOTHING_SET            => '',
       $resObj->ATTEMPTED              => '',
-      $resObj->ANSWER_SUBMITTED       => ''
+      $resObj->ANSWER_SUBMITTED       => '',
+      $resObj->PARTIALLY_CORRECT      => '#006600'
       );
 # And a special case in the nav map; what to do when the assignment
 # is not yet done and due in less then 24 hours
 my $hurryUpColor = "#FF0000";
 
 sub launch_win {
-    my ($mode,$script,$toplinkitems)=@_;
+    my ($mode,$script,$toplinkitems,$firsttime)=@_;
     my $result;
     if ($script ne 'no') {
 	$result.='<script type="text/javascript">';
     }
-    $result.='function launch_navmapwin() {
+    if ($firsttime) {
+	$result.='function launch_navmapwin() {
+                 newWindow=open(\'/adm/navmaps?launchExternalRoles\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');
+               }';
+    } else {
+	$result.='function launch_navmapwin() {
                  newWindow=open(\'/adm/navmaps?launchExternal\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');
                }';
+    }
     if ($mode eq 'now') {
 	$result.="\nlaunch_navmapwin();\n";
     }
@@ -108,7 +118,7 @@ sub launch_win {
 }
 
 sub close {
-    if ($ENV{'environment.remotenavmap'} ne 'on') { return ''; }
+    if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
     return(<<ENDCLOSE);
 <script type="text/javascript">
 window.status='Accessing Nav Control';
@@ -122,8 +132,8 @@ ENDCLOSE
 }
 
 sub update {
-    if ($ENV{'environment.remotenavmap'} ne 'on') { return ''; }
-    if (!$ENV{'request.course.id'}) { return ''; }
+    if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
+    if (!$env{'request.course.id'}) { return ''; }
     if ($ENV{'REQUEST_URI'}=~m|^/adm/navmaps|) { return ''; }
     return(<<ENDUPDATE);
 <form name="navform"></form>
@@ -142,10 +152,10 @@ sub handler {
 
 sub real_handler {
     my $r = shift;
-
+    #my $t0=[&gettimeofday()];
     # Handle header-only request
     if ($r->header_only) {
-        if ($ENV{'browser.mathml'}) {
+        if ($env{'browser.mathml'}) {
             &Apache::loncommon::content_type($r,'text/xml');
         } else {
             &Apache::loncommon::content_type($r,'text/html');
@@ -155,16 +165,15 @@ sub real_handler {
     }
 
     # Send header, don't cache this page
-    if ($ENV{'browser.mathml'}) {
+    if ($env{'browser.mathml'}) {
         &Apache::loncommon::content_type($r,'text/xml');
     } else {
         &Apache::loncommon::content_type($r,'text/html');
     }
     &Apache::loncommon::no_cache($r);
-    $r->send_http_header;
 
     my %toplinkitems=();
-
+    &add_linkitem(\%toplinkitems,'blank','',"Select Action");
     if ($ENV{QUERY_STRING} eq 'collapseExternal') {
 	&Apache::lonnet::put('environment',{'remotenavmap' => 'off'});
 	&Apache::lonnet::appenv('environment.remotenavmap' => 'off');
@@ -184,9 +193,8 @@ MENU
 	     $navstatus
 MENU
 	}
-	$r->print(<<"ENDSUBM");
-	<html>
-        <head>
+        $r->send_http_header;
+	my $js =<<"ENDSUBM";
 	  <script type="text/javascript">
  	    function submitthis() {
 		    $menu
@@ -194,15 +202,31 @@ MENU
 	    }
 	
   	  </script>
-        </head>
-	<body bgcolor="#FFFFFF" onLoad="submitthis()"></body>
-        </html>
 ENDSUBM
-        return;
+        $r->print(&Apache::lonxml::xmlbegin().
+		  &Apache::loncommon::head(undef,$js).
+		  '<body bgcolor="#FFFFFF" onLoad="submitthis()">'.
+		  &Apache::loncommon::end_page(undef,$js));
+
+        return OK;
     }
-    if ($ENV{QUERY_STRING} eq 'launchExternal') {
+    if ($ENV{QUERY_STRING} =~ /^launchExternal/) {
 	&Apache::lonnet::put('environment',{'remotenavmap' => 'on'});
 	&Apache::lonnet::appenv('environment.remotenavmap' => 'on');
+ 	my $menu=&Apache::lonmenu::reopenmenu();
+	my $navstatus=&Apache::lonmenu::get_nav_status();
+	if ($menu) {
+	    $r->print(<<MENU);
+             <script type="text/javascript">
+             swmenu=$menu
+             swmenu.clearTimeout(swmenu.menucltim);
+	     $navstatus
+             </script>
+MENU
+        }
+   }
+    if ($ENV{QUERY_STRING} eq 'turningOffExternal') {
+	$env{'environment.remotenavmap'}='off';
     }
 
     # Create the nav map
@@ -210,30 +234,30 @@ ENDSUBM
 
     if (!defined($navmap)) {
         my $requrl = $r->uri;
-        $ENV{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";
+        $env{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";
         return HTTP_NOT_ACCEPTABLE;
     }
+    $r->send_http_header;
 
-    $r->print("<html><head>\n");
-    $r->print("<title>".&mt('Navigate Course Contents')."</title>");
 # ------------------------------------------------------------ Get query string
-    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register','sort','showOnlyHomework']);
+    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register','sort','showOnlyHomework','postsymb']);
     
 # ----------------------------------------------------- Force menu registration
     my $addentries='';
     my $more_unload;
     my $body_only='';
-    if ($ENV{'environment.remotenavmap'} eq 'on') {
-	$r->print('<script type="text/javascript">
-                      function collapse() {
-                         this.document.location="/adm/navmaps?collapseExternal";
-                      }
-                   </script>');
+    my $js;
+    if ($env{'environment.remotenavmap'} eq 'on') {
+	$js='<script type="text/javascript">
+                function collapse() {
+                   this.document.location="/adm/navmaps?collapseExternal";
+                }
+             </script>';
 # FIXME need to be smarter to only catch window close events
 #	$more_unload="collapse()"
 	$body_only=1;
     }
-    if ($ENV{'form.register'}) {
+    if ($env{'form.register'}) {
 	$addentries=' onLoad="'.&Apache::lonmenu::loadevents().
 	    '" onUnload="'.&Apache::lonmenu::unloadevents().';'.
 	    $more_unload.'"';
@@ -243,10 +267,11 @@ ENDSUBM
     }
 
     # Header
-    $r->print('</head>'.
+    $r->print(&Apache::lonxml::xmlbegin().
+	      &Apache::loncommon::head('Navigate Course Contents',$js).
               &Apache::loncommon::bodytag('Navigate Course Contents','',
 					  $addentries,$body_only,'',
-					  $ENV{'form.register'}));
+					  $env{'form.register'}));
     $r->print('<script>window.focus();</script>');
      
     $r->rflush();
@@ -255,7 +280,7 @@ ENDSUBM
     if (!($navmap->courseMapDefined())) {
 	$r->print(&Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT'));
         $r->print('<font size="+2" color="red">Coursemap undefined.</font>' .
-                  '</body></html>');
+                  &Apache::loncommon::end_page());
         return OK;
     }
 
@@ -277,15 +302,15 @@ ENDSUBM
         if ($sequenceCount == 1) {
             # The automatic iterator creation in the render call 
             # will pick this up. We know the condition because
-            # the defined($ENV{'form.filter'}) also ensures this
+            # the defined($env{'form.filter'}) also ensures this
             # is a fresh call.
-            $ENV{'form.filter'} = "$sequenceId";
+            $env{'form.filter'} = "$sequenceId";
         }
     }
 
     if ($ENV{QUERY_STRING} eq 'launchExternal') {
 	$r->print('
-          <form name="returnwin" action="/adm/flip?postdata=return%3a" 
+          <form name="returnwin" action="/adm/flip?postdata=navlaunch%3a" 
                 method="post" target="loncapaclient">
           </form>');
 	$r->print('
@@ -294,10 +319,10 @@ ENDSUBM
           </script>');
     }
 
-    if ($ENV{'environment.remotenavmap'} ne 'on') {
+    if ($env{'environment.remotenavmap'} ne 'on') {
 	$r->print(&launch_win('link','yes',\%toplinkitems));
     } 
-    if ($ENV{'environment.remotenavmap'} eq 'on') {
+    if ($env{'environment.remotenavmap'} eq 'on') {
 	&add_linkitem(\%toplinkitems,'closenav','collapse()',
 		      "Close navigation window");
     } 
@@ -324,10 +349,10 @@ ENDSUBM
                     pop @$stack; # last resource in the stack is the problem
                                  # itself, which we don't need in the map stack
                     my @mapPcs = map {$_->map_pc()} @$stack;
-                    $ENV{'form.filter'} = join(',', @mapPcs);
+                    $env{'form.filter'} = join(',', @mapPcs);
 
                     # Mark as both "here" and "jump"
-                    $ENV{'form.postsymb'} = $curRes->symb();
+                    $env{'form.postsymb'} = $curRes->symb();
                 }
             }
         }
@@ -348,30 +373,30 @@ ENDSUBM
 
     # Display only due homework.
     my $showOnlyHomework = 0;
-    if ($ENV{'form.showOnlyHomework'} eq "1") {
+    if ($env{'form.showOnlyHomework'} eq "1") {
         $showOnlyHomework = 1;
         $suppressEmptySequences = 1;
         $filterFunc = sub { my $res = shift; 
                             return $res->completable() || $res->is_map();
                         };
 	&add_linkitem(\%toplinkitems,'everything',
-		     'location.href="navmaps?sort='.$ENV{'form.sort'}.'"',
+		     'location.href="navmaps?sort='.$env{'form.sort'}.'"',
 		      "Show Everything");
         $r->print("<p><font size='+2'>".&mt("Uncompleted Homework")."</font></p>");
-        $ENV{'form.filter'} = '';
-        $ENV{'form.condition'} = 1;
+        $env{'form.filter'} = '';
+        $env{'form.condition'} = 1;
 	$resource_no_folder_link = 1;
     } else {
 	&add_linkitem(\%toplinkitems,'uncompleted',
-		      'location.href="navmaps?sort='.$ENV{'form.sort'}.
+		      'location.href="navmaps?sort='.$env{'form.sort'}.
 		          '&showOnlyHomework=1"',
 		      "Show Only Uncompleted Homework");
     }
 
-    my %selected=($ENV{'form.sort'} => 'selected=on');
+    my %selected=($env{'form.sort'} => 'selected=on');
     my $sort_html=("<form>
                  <nobr>
-                    <input type=\"hidden\" name=\"showOnlyHomework\" value=\"".$ENV{'form.showOnlyHomework'}."\" />
+                    <input type=\"hidden\" name=\"showOnlyHomework\" value=\"".$env{'form.showOnlyHomework'}."\" />
                     <input type=\"submit\" value=\"".&mt('Sort by:')."\" />
                     <select name=\"sort\">
                        <option value=\"default\" $selected{'default'}>".&mt('Default')."</option>
@@ -383,7 +408,7 @@ ENDSUBM
                </form>");
     # renderer call
     my $renderArgs = { 'cols' => [0,1,2,3],
-		       'sort' => $ENV{'form.sort'},
+		       'sort' => $env{'form.sort'},
                        'url' => '/adm/navmaps',
                        'navmap' => $navmap,
                        'suppressNavmap' => 1,
@@ -405,8 +430,10 @@ ENDSUBM
             $r->print("<p><font size='+1'>This course is empty.</font></p>");
         }
     }
+    #my $td=&tv_interval($t0);
+    #$r->print("<br />$td");
 
-    $r->print("</body></html>");
+    $r->print(&Apache::loncommon::end_page());
     $r->rflush();
 
     return OK;
@@ -487,22 +514,23 @@ sub getDescription {
         return &mt("Not currently assigned.");
     }
     if ($status == $res->OPEN_LATER) {
-        return "Open " . timeToHumanString($res->opendate($part));
+        return "Open " . timeToHumanString($res->opendate($part),'start');
     }
     if ($status == $res->OPEN) {
         if ($res->duedate($part)) {
-            return &mt("Due")."  " .timeToHumanString($res->duedate($part));
+            return &mt("Due")."  " .timeToHumanString($res->duedate($part),'end');
         } else {
             return &mt("Open, no due date");
         }
     }
     if ($status == $res->PAST_DUE_ANSWER_LATER) {
-        return &mt("Answer open")." " . timeToHumanString($res->answerdate($part));
+        return &mt("Answer open")." " . timeToHumanString($res->answerdate($part),'start');
     }
     if ($status == $res->PAST_DUE_NO_ANSWER) {
-        return &mt("Was due")." " . timeToHumanString($res->duedate($part));
+        return &mt("Was due")." " . timeToHumanString($res->duedate($part),'end');
     }
-    if ($status == $res->ANSWER_OPEN) {
+    if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
+	&& $res->handgrade($part) ne 'yes') {
         return &mt("Answer available");
     }
     if ($status == $res->EXCUSED) {
@@ -522,7 +550,7 @@ sub getDescription {
             }
         }
         if ($res->duedate($part)) {
-            return &mt("Due")." " . timeToHumanString($res->duedate($part)) .
+            return &mt("Due")." " . timeToHumanString($res->duedate($part),'end') .
                 " $triesString";
         } else {
             return &mt("No due date")." $triesString";
@@ -560,10 +588,10 @@ sub lastTry {
         $res->duedate($part) > time();
 }
 
-# This puts a human-readable name on the ENV variable.
+# This puts a human-readable name on the env variable.
 
 sub advancedUser {
-    return $ENV{'request.role.adv'};
+    return $env{'request.role.adv'};
 }
 
 
@@ -575,8 +603,11 @@ sub advancedUser {
 # print "Answer available $timestring"
 # Very, very, very, VERY English-only... goodness help a localizer on
 # this func...
+
+
 sub timeToHumanString {
-    my ($time) = @_;
+    my ($time,$type,$format) = @_;
+
     # zero, '0' and blank are bad times
     if (!$time) {
         return &mt('never');
@@ -647,30 +678,44 @@ sub timeToHumanString {
             return "$prefix$hourString$minuteString$tense";
         }
 
+	# If there's a caller supplied format, use it.
+
+	if($format ne '') {
+	    my $timeStr = strftime($format, localtime($time));
+	    return $timeStr.&Apache::lonlocal::gettimezone();
+	}
+
         # Less then 5 days away, display day of the week and
         # HH:MM
+
         if ( $delta < $day * 5 ) {
             my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
             $timeStr =~ s/12:00 am/00:00/;
             $timeStr =~ s/12:00 pm/noon/;
-            return ($inPast ? "last " : "next ") .
-                $timeStr;
+            return ($inPast ? "last " : "this ") .
+                $timeStr.&Apache::lonlocal::gettimezone();
         }
         
+	my $conjunction='on';
+	if ($type eq 'start') {
+	    $conjunction='at';
+	} elsif ($type eq 'end') {
+	    $conjunction='by';
+	}
         # Is it this year?
         if ( $time[5] == $now[5]) {
             # Return on Month Day, HH:MM meridian
-            my $timeStr = strftime("on %A, %b %e at %I:%M %P", localtime($time));
+            my $timeStr = strftime("$conjunction %A, %b %e at %I:%M %P", localtime($time));
             $timeStr =~ s/12:00 am/00:00/;
             $timeStr =~ s/12:00 pm/noon/;
-            return $timeStr;
+            return $timeStr.&Apache::lonlocal::gettimezone();
         }
 
         # Not this year, so show the year
-        my $timeStr = strftime("on %A, %b %e %Y at %I:%M %P", localtime($time));
+        my $timeStr = strftime("$conjunction %A, %b %e %Y at %I:%M %P", localtime($time));
         $timeStr =~ s/12:00 am/00:00/;
         $timeStr =~ s/12:00 pm/noon/;
-        return $timeStr;
+        return $timeStr.&Apache::lonlocal::gettimezone();
     }
 }
 
@@ -866,13 +911,13 @@ automatically.
 
 =over 4
 
-=item * B<iterator>: default: constructs one from %ENV
+=item * B<iterator>: default: constructs one from %env
 
 A reference to a fresh ::iterator to use from the navmaps. The
 rendering will reflect the options passed to the iterator, so you can
 use that to just render a certain part of the course, if you like. If
 one is not passed, the renderer will attempt to construct one from
-ENV{'form.filter'} and ENV{'form.condition'} information, plus the
+env{'form.filter'} and env{'form.condition'} information, plus the
 'iterator_map' parameter if any.
 
 =item * B<iterator_map>: default: not used
@@ -882,11 +927,11 @@ instruct the renderer to render only a p
 the source of the map you want to process, like
 '/res/103/jerf/navmap.course.sequence'.
 
-=item * B<navmap>: default: constructs one from %ENV
+=item * B<navmap>: default: constructs one from %env
 
 A reference to a navmap, used only if an iterator is not passed in. If
 this is necessary to make an iterator but it is not passed in, a new
-one will be constructed based on ENV info. This is useful to do basic
+one will be constructed based on env info. This is useful to do basic
 error checking before passing it off to render.
 
 =item * B<r>: default: must be passed in
@@ -912,12 +957,12 @@ then only one line will be displayed for
 all parts will always be displayed. If showParts is 0, this is
 ignored.
 
-=item * B<jumpCount>: default: determined from %ENV
+=item * B<jumpCount>: default: determined from %env
 
 A string identifying the URL to place the anchor 'curloc' at.
 It is the responsibility of the renderer user to
 ensure that the #curloc is in the URL. By default, determined through
-the use of the ENV{} 'jump' information, and should normally "just
+the use of the env{} 'jump' information, and should normally "just
 work" correctly.
 
 =item * B<here>: default: empty string
@@ -945,7 +990,7 @@ are allowing the user to open and close
 
 Describes the currently-open row number to cause the browser to jump
 to, because the user just opened that folder. By default, pulled from
-the Jump information in the ENV{'form.*'}.
+the Jump information in the env{'form.*'}.
 
 =item * B<printKey>: default: false
 
@@ -1020,7 +1065,6 @@ sub render_resource {
     #  it will be quoted with ' in the href.
 
     my ($left,$right) = split(/\?/, $link);
-    $left =~ s/'/\\'/g;
     $link = $left.'?'.$right;
 
     my $src = $resource->src();
@@ -1034,28 +1078,28 @@ sub render_resource {
     my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
     # If this is a new branch, label it so
     if ($params->{'isNewBranch'}) {
-        $newBranchText = "<img src='$location/branch.gif' border='0' />";
+        $newBranchText = "<img src='$location/branch.gif' border='0' alt='Branch' />";
     }
 
     # links to open and close the folder
 
     
-    my $linkopen = "<a href='$link'>";
+    my $linkopen = "<a href=\"$link\">";
 
 
     my $linkclose = "</a>";
 
     # Default icon: unknown page
-    my $icon = "<img src='$location/unknown.gif' alt='' border='0' />";
+    my $icon = "<img src='$location/unknown.gif' alt='' border='0' alt='&nbsp;&nbsp;' ' />";
     
     if ($resource->is_problem()) {
         if ($part eq '0' || $params->{'condensed'}) {
-            $icon ='<img src="'.$location.'/problem.gif" alt="" border="0" />';
+            $icon ='<img src="'.$location.'/problem.gif" alt="'.&mt('Problem').'" border="0" />';
         } else {
             $icon = $params->{'indentString'};
         }
     } else {
-	$icon = "<img src='".&Apache::loncommon::lonhttpdurl(&Apache::loncommon::icon($resource->src))."' alt='' border='0' />";
+	$icon = "<img src='".&Apache::loncommon::icon($resource->src)."' alt='&nbsp;&nbsp;' border='0' />";
     }
 
     # Display the correct map icon to open or shut map
@@ -1067,12 +1111,14 @@ sub render_resource {
         }
 
 	my $folderType = $resource->is_sequence() ? 'folder' : 'page';
-
+        my $title=$resource->title;
+        $title=~s/\"/\&quot;/g;
         if (!$params->{'resource_no_folder_link'}) {
             $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
-            $icon = "<img src='$location/$icon' alt='' border='0' />";
+	    $icon = "<img src='$location/$icon' alt=\"".
+		($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
 
-            $linkopen = "<a href='" . $params->{'url'} . '?' . 
+            $linkopen = "<a href=\"" . $params->{'url'} . '?' . 
                 $params->{'queryString'} . '&filter=';
             $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
                 addToFilter($filter, $mapId) :
@@ -1082,13 +1128,14 @@ sub render_resource {
                 &Apache::lonnet::escape($params->{'here'}) . 
                 '&jump=' .
                 &Apache::lonnet::escape($resource->symb()) . 
-                "&folderManip=1'>";
+                "&folderManip=1\">";
 
         } else {
             # Don't allow users to manipulate folder
             $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .
                 '.nomanip.gif';
-            $icon = "<img src='$location/$icon' alt='' border='0' />";
+            $icon = "<img src='$location/$icon' alt=\"".
+		($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
 
             $linkopen = "";
             $linkclose = "";
@@ -1096,7 +1143,10 @@ sub render_resource {
     }
 
     if ($resource->randomout()) {
-        $nonLinkedText .= ' <i>(hidden)</i> ';
+        $nonLinkedText .= ' <i>('.&mt('hidden').')</i> ';
+    }
+    if (!$resource->condval()) {
+        $nonLinkedText .= ' <i>('.&mt('conditionally hidden').')</i> ';
     }
     
     # We're done preparing and finally ready to start the rendering
@@ -1120,7 +1170,7 @@ sub render_resource {
     # Is this the current resource?
     if (!$params->{'displayedHereMarker'} && 
         $resource->symb() eq $params->{'here'} ) {
-        $curMarkerBegin = '<font color="red" size="+2">&gt; </font>';
+        $curMarkerBegin = '<font color="red" size="+2">&gt;</font>';
         $curMarkerEnd = '<font color="red" size="+2">&lt;</font>';
         $params->{'displayedHereMarker'} = 1;
     }
@@ -1128,21 +1178,21 @@ sub render_resource {
     if ($resource->is_problem() && $part ne '0' && 
         !$params->{'condensed'}) {
 	my $displaypart=$resource->part_display($part);
-        $partLabel = " (Part: $displaypart)";
+        $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
 	if ($link!~/\#/) { $link.='#'.&Apache::lonnet::escape($part); }
         $title = "";
     }
 
     if ($params->{'condensed'} && $resource->countParts() > 1) {
-        $nonLinkedText .= ' (' . $resource->countParts() . ' parts)';
+        $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
     }
 
     my $target;
-    if ($ENV{'environment.remotenavmap'} eq 'on') {
+    if ($env{'environment.remotenavmap'} eq 'on') {
 	$target=' target="loncapaclient" ';
     }
     if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
-        $result .= "  $curMarkerBegin<a $target href='$link'>$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
+        $result .= "  $curMarkerBegin<a $target href=\"$link\">$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
     } else {
         $result .= "  $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
     }
@@ -1155,7 +1205,11 @@ sub render_communication_status {
     my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
 
     my $link = $params->{"resourceLink"};
-    my $linkopen = "<a href='$link'>";
+    my $target;
+    if ($env{'environment.remotenavmap'} eq 'on') {
+	$target=' target="loncapaclient" ';
+    }
+    my $linkopen = "<a $target href=\"$link\">";
     my $linkclose = "</a>";
     my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
     if ($resource->hasDiscussion()) {
@@ -1168,7 +1222,7 @@ sub render_communication_status {
         my $feedback = $resource->getFeedback();
         foreach (split(/\,/, $feedback)) {
             if ($_) {
-                $feedbackHTML .= '&nbsp;<a href="/adm/email?display='
+                $feedbackHTML .= '&nbsp;<a '.$target.' href="/adm/email?display='
                     . &Apache::lonnet::escape($_) . '">'
                     . '<img src="'.$location.'/feedback.gif" '
                     . 'border="0" /></a>';
@@ -1183,7 +1237,7 @@ sub render_communication_status {
             last if ($errorcount>=10); # Only output 10 bombs maximum
             if ($_) {
                 $errorcount++;
-                $errorHTML .= '&nbsp;<a href="/adm/email?display='
+                $errorHTML .= '&nbsp;<a '.$target.' href="/adm/email?display='
                     . &Apache::lonnet::escape($_) . '">'
                     . '<img src="'.$location.'/bomb.gif" '
                     . 'border="0" /></a>';
@@ -1205,7 +1259,11 @@ sub render_quick_status {
         $params->{'multipart'} && $part eq "0";
 
     my $link = $params->{"resourceLink"};
-    my $linkopen = "<a href='$link'>";
+    my $target;
+    if ($env{'environment.remotenavmap'} eq 'on') {
+	$target=' target="loncapaclient" ';
+    }
+    my $linkopen = "<a $target href=\"$link\">";
     my $linkclose = "</a>";
 
     if ($resource->is_problem() &&
@@ -1364,7 +1422,6 @@ sub render {
         # no columns, no nav maps.
         return '';
     }
-    my $mustCloseNavMap = 0;
     my $navmap;
     if (defined($args->{'navmap'})) {
         $navmap = $args->{'navmap'};
@@ -1385,7 +1442,7 @@ sub render {
     # marker
     my $filterHash = {};
     # Figure out what we're not displaying
-    foreach (split(/\,/, $ENV{"form.filter"})) {
+    foreach (split(/\,/, $env{"form.filter"})) {
         if ($_) {
             $filterHash->{$_} = "1";
         }
@@ -1405,30 +1462,43 @@ sub render {
     }
 
     my $condition = 0;
-    if ($ENV{'form.condition'}) {
+    if ($env{'form.condition'}) {
         $condition = 1;
     }
 
-    if (!$ENV{'form.folderManip'} && !defined($args->{'iterator'})) {
+    if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
         # Step 1: Check to see if we have a navmap
         if (!defined($navmap)) {
             $navmap = Apache::lonnavmaps::navmap->new();
-            $mustCloseNavMap = 1;
-        }
+	    if (!defined($navmap)) {
+		# no londer in course
+		return '<font color="red">'.&mt('No course selected').'</font><br />
+                        <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
+	    }
+	}
 
         # Step two: Locate what kind of here marker is necessary
         # Determine where the "here" marker is and where the screen jumps to.
 
-        if ($ENV{'form.postsymb'}) {
-            $here = $jump = &Apache::lonnet::symbclean($ENV{'form.postsymb'});
-        } elsif ($ENV{'form.postdata'}) {
+        if ($env{'form.postsymb'} ne '') {
+            $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
+        } elsif ($env{'form.postdata'} ne '') {
             # couldn't find a symb, is there a URL?
-            my $currenturl = $ENV{'form.postdata'};
+            my $currenturl = $env{'form.postdata'};
             #$currenturl=~s/^http\:\/\///;
             #$currenturl=~s/^[^\/]+//;
             
             $here = $jump = &Apache::lonnet::symbread($currenturl);
-        }
+	}
+	if ($here eq '') {
+	    my $last;
+	    if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
+                    &GDBM_READER(),0640)) {
+		$last=$hash{'last_known'};
+		untie(%hash);
+	    }
+	    if ($last) { $here = $jump = $last; }
+	}
 
         # Step three: Ensure the folders are open
         my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
@@ -1455,21 +1525,20 @@ sub render {
         }            
     }        
 
-    if ( !defined($args->{'iterator'}) && $ENV{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
+    if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
         # If this is a click on a folder or something, we want to preserve the "here"
         # from the querystring, and get the new "jump" marker
-        $here = $ENV{'form.here'};
-        $jump = $ENV{'form.jump'};
+        $here = $env{'form.here'};
+        $jump = $env{'form.jump'};
     } 
     
     my $it = $args->{'iterator'};
     if (!defined($it)) {
-        # Construct a default iterator based on $ENV{'form.'} information
+        # Construct a default iterator based on $env{'form.'} information
         
         # Step 1: Check to see if we have a navmap
         if (!defined($navmap)) {
             $navmap = Apache::lonnavmaps::navmap->new();
-            $mustCloseNavMap = 1;
         }
 
         # See if we're being passed a specific map
@@ -1575,13 +1644,7 @@ END
 	    my @allres=$navmap->retrieveResources();
 	    foreach my $resource (@allres) {
 		if ($resource->hasDiscussion()) {
-		    my $ressymb;
-		    if ($resource->symb() =~ m-(___adm/\w+/\w+)/(\d+)/bulletinboard$-) {
-			$ressymb = 'bulletin___'.$2.$1.'/'.$2.'/bulletinboard';
-		    } else {
-			$ressymb = $resource->symb();
-		    }
-		    $haveDisc .= $ressymb.':';
+		    $haveDisc .= $resource->wrap_symb().':';
 		    $totdisc ++;
 		}
 	    }
@@ -1599,14 +1662,14 @@ END
     if ($args->{'caller'} eq 'navmapsdisplay') {
         $result .= '<table><tr><td>'.
                    &Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT').'</td>';
-	if ($ENV{'environment.remotenavmap'} ne 'on') {
+	if ($env{'environment.remotenavmap'} ne 'on') {
 	    $result .= '<td>&nbsp;</td>'; 
         } else {
 	    $result .= '</tr><tr>'; 
         }
 	$result.=&show_linkitems($args->{'linkitems'});
         if ($args->{'sort_html'}) {
-	    if ($ENV{'environment.remotenavmap'} ne 'on') {
+	    if ($env{'environment.remotenavmap'} ne 'on') {
 		$result.='<td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td>'.
 		    '<td align="right">'.$args->{'sort_html'}.'</td></tr>';
 	    } else {
@@ -1643,7 +1706,7 @@ END
     $args->{'condensed'} = 0;    
     my $location=
 	&Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace1.gif");
-    $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' width='25' height='1' alt='' border='0' />");
+    $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' width='25' height='1' alt='&nbsp;&nbsp;' border='0' />");
     $args->{'displayedHereMarker'} = 0;
 
     # If we're suppressing empty sequences, look for them here. Use DFS for speed,
@@ -1796,10 +1859,6 @@ END
             $args->{'multipart'} = $curRes->multipart();
             
             if ($condenseParts) { # do the condensation
-                if (!$curRes->opendate("0")) {
-                    @parts = ();
-                    $args->{'condensed'} = 1;
-                }
                 if (!$args->{'condensed'}) {
                     # Decide whether to condense based on similarity
                     my $status = $curRes->status($parts[0]);
@@ -1956,8 +2015,8 @@ sub add_linkitem {
 
 sub show_linkitems {
     my ($linkitems)=@_;
-    my @linkorder = ("launchnav","closenav","firsthomework","everything",
-		     "uncompleted","changefolder","clearbubbles");
+    my @linkorder = ("blank","launchnav","closenav","firsthomework",
+		     "everything","uncompleted","changefolder","clearbubbles");
     
     my $result .= (<<ENDBLOCK);
               <td align="left">
@@ -2007,15 +2066,16 @@ In order of increasing complexity and po
 
 =over 4
 
-=item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb>, B<Url> or B<MapPc>. This provides
+=item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
     various ways to obtain resource objects, based on various identifiers.
     Use this when you want to request information about one object or 
     a handful of resources you already know the identities of, from some
     other source. For more about Ids, Symbs, and MapPcs, see the
     Resource documentation. Note that Url should be a B<last resort>,
-    not your first choice; it only works when there is only one
+    not your first choice; it only really works when there is only one
     instance of the resource in the course, which only applies to
-    maps, and even that may change in the future.
+    maps, and even that may change in the future (see the B<getResourceByUrl>
+    documentation for more details.)
 
 =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
     retrieves resources matching some criterion and returns them
@@ -2057,6 +2117,7 @@ See iterator documentation below.
 
 use strict;
 use GDBM_File;
+use Apache::lonnet;
 
 sub new {
     # magic invocation to create a class instance
@@ -2076,7 +2137,7 @@ sub new {
 
     my %navmaphash;
     my %parmhash;
-    my $courseFn = $ENV{"request.course.fn"};
+    my $courseFn = $env{"request.course.fn"};
     if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
               &GDBM_READER(), 0640))) {
         return undef;
@@ -2102,56 +2163,36 @@ sub generate_course_user_opt {
     my $self = shift;
     if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
 
-    my $uname=$ENV{'user.name'};
-    my $udom=$ENV{'user.domain'};
-    my $uhome=$ENV{'user.home'};
-    my $cid=$ENV{'request.course.id'};
-    my $chome=$ENV{'course.'.$cid.'.home'};
-    my ($cdom,$cnum)=split(/\_/,$cid);
+    my $uname=$env{'user.name'};
+    my $udom=$env{'user.domain'};
+    my $cid=$env{'request.course.id'};
+    my $cdom=$env{'course.'.$cid.'.domain'};
+    my $cnum=$env{'course.'.$cid.'.num'};
     
-    my $userprefix=$uname.'_'.$udom.'_';
-    
-    my %courserdatas; my %useropt; my %courseopt; my %userrdatas;
-    unless ($uhome eq 'no_host') { 
 # ------------------------------------------------- Get coursedata (if present)
-	unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
-	    my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
-					     ':resourcedata',$chome);
-	    # Check for network failure
-	    if ( $reply =~ /no.such.host/i || $reply =~ /con_lost/i) {
-		$self->{NETWORK_FAILURE} = 1;
-	    } elsif ($reply!~/^error\:/) {
-		$courserdatas{$cid}=$reply;
-		$courserdatas{$cid.'.last_cache'}=time;
-	    }
-	}
-	foreach (split(/\&/,$courserdatas{$cid})) {
-	    my ($name,$value)=split(/\=/,$_);
-	    $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
-		&Apache::lonnet::unescape($value);
+    my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
+    # Check for network failure
+    if (!ref($courseopt)) {
+	if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
+	    $self->{NETWORK_FAILURE} = 1;
 	}
+	undef($courseopt);
+    }
+
 # --------------------------------------------------- Get userdata (if present)
-	unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
-	    my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
-	    if ($reply!~/^error\:/) {
-		$userrdatas{$uname.'___'.$udom}=$reply;
-		$userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
-	    }
-	    # check to see if network failed
-	    elsif ( $reply=~/no.such.host/i || $reply=~/con.*lost/i )
-	    {
-		$self->{NETWORK_FAILURE} = 1;
-	    }
-	}
-	foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
-	    my ($name,$value)=split(/\=/,$_);
-	    $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
-		&Apache::lonnet::unescape($value);
+	
+    my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
+    # Check for network failure
+    if (!ref($useropt)) {
+	if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
+	    $self->{NETWORK_FAILURE} = 1;
 	}
-	$self->{COURSE_OPT} = \%courseopt;
-	$self->{USER_OPT} = \%useropt;
+	undef($useropt);
     }
 
+    $self->{COURSE_OPT} = $courseopt;
+    $self->{USER_OPT} = $useropt;
+
     $self->{COURSE_USER_OPT_GENERATED} = 1;
     
     return;
@@ -2162,18 +2203,19 @@ sub generate_email_discuss_status {
     my $symb = shift;
     if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
 
-    my $cid=$ENV{'request.course.id'};
-    my ($cdom,$cnum)=split(/\_/,$cid);
+    my $cid=$env{'request.course.id'};
+    my $cdom=$env{'course.'.$cid.'.domain'};
+    my $cnum=$env{'course.'.$cid.'.num'};
     
     my %emailstatus = &Apache::lonnet::dump('email_status');
     my $logoutTime = $emailstatus{'logout'};
-    my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
+    my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
     $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
 			   $courseLeaveTime : $logoutTime);
     my %discussiontime = &Apache::lonnet::dump('discussiontimes', 
 					       $cdom, $cnum);
     my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
-                                        $ENV{'user.domain'},$ENV{'user.name'},'lastread');
+                                        $env{'user.domain'},$env{'user.name'},'lastread');
     my %lastreadtime = ();
     foreach (keys %lastread) {
         my $key = $_;
@@ -2183,19 +2225,16 @@ sub generate_email_discuss_status {
 
     my %feedback=();
     my %error=();
-    my $keys = &Apache::lonnet::reply('keys:'.
-				      $ENV{'user.domain'}.':'.
-				      $ENV{'user.name'}.':nohist_email',
-				      $ENV{'user.home'});
+    my @keys = &Apache::lonnet::getkeys('nohist_email',$env{'user.domain'},
+					$env{'user.name'});
     
-    foreach my $msgid (split(/\&/, $keys)) {
-	$msgid=&Apache::lonnet::unescape($msgid);
+    foreach my $msgid (@keys) {
 	if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
 	    my $plain=
 		&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
-	    if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
-		my ($what,$url)=($1,$2);
-		if ($what eq 'Error') {
+	    if ($plain=~/ \[([^\]]+)\]\:/) {
+		my $url=$1;
+		if ($plain=~/\:Error \[/) {
 		    $error{$url}.=','.$msgid; 
 		} else {
 		    $feedback{$url}.=','.$msgid;
@@ -2220,14 +2259,35 @@ sub get_user_data {
     if ($self->{RETRIEVED_USER_DATA}) { return; }
 
     # Retrieve performance data on problems
-    my %student_data = Apache::lonnet::currentdump($ENV{'request.course.id'},
-						   $ENV{'user.domain'},
-						   $ENV{'user.name'});
+    my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
+						   $env{'user.domain'},
+						   $env{'user.name'});
     $self->{STUDENT_DATA} = \%student_data;
 
     $self->{RETRIEVED_USER_DATA} = 1;
 }
 
+sub get_discussion_data {
+    my $self = shift;
+    if ($self->{RETRIEVED_DISCUSSION_DATA}) {
+	return $self->{DISCUSSION_DATA};
+    }
+
+    $self->generate_email_discuss_status();    
+
+    my $cid=$env{'request.course.id'};
+    my $cdom=$env{'course.'.$cid.'.domain'};
+    my $cnum=$env{'course.'.$cid.'.num'};
+    # Retrieve discussion data for resources in course
+    my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
+
+
+    $self->{DISCUSSION_DATA} = \%discussion_data;
+    $self->{RETRIEVED_DISCUSSION_DATA} = 1;
+    return $self->{DISCUSSION_DATA};
+}
+
+
 # Internal function: Takes a key to look up in the nav hash and implements internal
 # memory caching of that key.
 sub navhash {
@@ -2247,7 +2307,7 @@ sub navhash {
 # Checks to see if coursemap is defined, matching test in old lonnavmaps
 sub courseMapDefined {
     my $self = shift;
-    my $uri = &Apache::lonnet::clutter($ENV{'request.course.uri'});
+    my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
 
     my $firstres = $self->navhash("map_start_$uri");
     my $lastres = $self->navhash("map_finish_$uri");
@@ -2257,7 +2317,8 @@ sub courseMapDefined {
 sub getIterator {
     my $self = shift;
     my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
-                                                     shift, undef, shift);
+                                                     shift, undef, shift,
+						     shift, shift);
     return $iterator;
 }
 
@@ -2266,21 +2327,14 @@ sub getIterator {
 sub hasDiscussion {
     my $self = shift;
     my $symb = shift;
-    
     $self->generate_email_discuss_status();
 
     if (!defined($self->{DISCUSSION_TIME})) { return 0; }
 
     #return defined($self->{DISCUSSION_TIME}->{$symb});
 
-# backward compatibility (bulletin boards used to be 'wrapped')
-    my $ressymb = $symb;
-    if ($ressymb =~ m|adm/(\w+)/(\w+)/(\d+)/bulletinboard$|) {
-        unless ($ressymb =~ m|adm/wrapper/adm|) {
-            $ressymb = 'bulletin___'.$3.'___adm/wrapper/adm/'.$1.'/'.$2.'/'.$3.'/bulletinboard';
-        }
-    }
-
+    # backward compatibility (bulletin boards used to be 'wrapped')
+    my $ressymb = $self->wrap_symb($symb);
     if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
         return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
     } else {
@@ -2289,9 +2343,76 @@ sub hasDiscussion {
     }
 }
 
+sub last_post_time {
+    my $self = shift;
+    my $symb = shift;
+    my $ressymb = $self->wrap_symb($symb);
+    return $self->{DISCUSSION_TIME}->{$ressymb};
+}
+
+sub unread_discussion {
+    my $self = shift;
+    my $symb = shift;
+
+    $self->get_discussion_data();
+    
+    my $ressymb = $self->wrap_symb($symb);
+
+    my $version = $self->{DISCUSSION_DATA}{'version:'.$ressymb};
+    if (!$version) { return; }
+
+    my $prevread = $self->{LAST_READ}{$ressymb};
+
+    my $unreadcount = 0;
+    my $hiddenflag = 0;
+    my $deletedflag = 0;
+    my ($hidden,$deleted);
+
+    my %subjects;
+
+    for (my $id=$version; $id>0; $id--) {
+	my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$ressymb};
+	my @keys=split(/:/,$vkeys);
+	if (grep(/^hidden$/ ,@keys)) {
+	    if (!$hiddenflag) {
+		$hidden = $self->{DISCUSSION_DATA}{$id.':'.$ressymb.':hidden'};
+		$hiddenflag = 1;
+	    }
+	} elsif (grep(/^deleted$/,@keys)) {
+	    if (!$deletedflag) {
+		$deleted = $self->{DISCUSSION_DATA}{$id.':'.$ressymb.':deleted'};
+		$deletedflag = 1;
+	    }
+	} else {
+	    if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)
+		&& $prevread < $self->{DISCUSSION_DATA}{$id.':'.$ressymb.':timestamp'}) {
+		    $unreadcount++;
+		    $subjects{$unreadcount}=
+			$id.': '.$self->{DISCUSSION_DATA}{$id.':'.$ressymb.':subject'};
+		}
+	}
+    }
+    if (wantarray) {
+	return ($unreadcount,\%subjects);
+    }
+    return $unreadcount
+}
+
+sub wrap_symb {
+    my $self = shift;
+    my $symb = shift;
+    if ($symb =~ m-___(adm/\w+/\w+/)(\d+)(/bulletinboard)$-) {
+        unless ($symb =~ m|adm/wrapper/adm|) {
+            $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
+        }
+    }
+    return $symb;
+}
+
 # Private method: Does the given resource (as a symb string) have
 # current feedback? Returns the string in the feedback hash, which
 # will be false if it does not exist.
+
 sub getFeedback { 
     my $self = shift;
     my $symb = shift;
@@ -2387,7 +2508,7 @@ resource in the navmap.
 sub firstResource {
     my $self = shift;
     my $firstResource = $self->navhash('map_start_' .
-                     &Apache::lonnet::clutter($ENV{'request.course.uri'}));
+                     &Apache::lonnet::clutter($env{'request.course.uri'}));
     return $self->getById($firstResource);
 }
 
@@ -2403,7 +2524,7 @@ in the navmap.
 sub finishResource {
     my $self = shift;
     my $firstResource = $self->navhash('map_finish_' .
-                     &Apache::lonnet::clutter($ENV{'request.course.uri'}));
+                     &Apache::lonnet::clutter($env{'request.course.uri'}));
     return $self->getById($firstResource);
 }
 
@@ -2430,10 +2551,16 @@ sub parmval_real {
     # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
     $self->generate_course_user_opt();
 
-    my $cid=$ENV{'request.course.id'};
-    my $csec=$ENV{'request.course.sec'};
-    my $uname=$ENV{'user.name'};
-    my $udom=$ENV{'user.domain'};
+    my $cid=$env{'request.course.id'};
+    my $csec=$env{'request.course.sec'};
+    my $cgroup='';
+    my @cgrps=split(/:/,$env{'request.course.groups'});
+    if (@cgrps > 0) {
+        @cgrps = sort(@cgrps);
+        $cgroup = $cgrps[0];
+    } 
+    my $uname=$env{'user.name'};
+    my $udom=$env{'user.domain'};
 
     unless ($symb) { return ''; }
     my $result='';
@@ -2447,7 +2574,11 @@ sub parmval_real {
 
     my $symbparm=$symb.'.'.$what;
     my $mapparm=$mapname.'___(all).'.$what;
-    my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;
+    my $usercourseprefix=$cid;
+
+    my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
+    my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
+    my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
 
     my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
     my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
@@ -2469,6 +2600,12 @@ sub parmval_real {
     }
 
 # ------------------------------------------------------- second, check course
+    if ($cgroup ne '' and defined($courseopt)) {
+        if (defined($$courseopt{$grplevelr})) { return $$courseopt{$grplevelr}; }
+        if (defined($$courseopt{$grplevelm})) { return $$courseopt{$grplevelm}; }
+        if (defined($$courseopt{$grplevel})) { return $$courseopt{$grplevel}; }
+    }
+
     if ($csec and defined($courseopt)) {
         if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }
         if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }
@@ -2477,8 +2614,6 @@ sub parmval_real {
 
     if (defined($courseopt)) {
         if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }
-        if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
-        if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
     }
 
 # ----------------------------------------------------- third, check map parms
@@ -2495,7 +2630,13 @@ sub parmval_real {
     $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
     if (defined($default)) { return $default}
 
-# --------------------------------------------------- fifth , cascade up parts
+# --------------------------------------------------- fifth, check more course
+    if (defined($courseopt)) {
+        if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
+        if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
+    }
+
+# --------------------------------------------------- sixth , cascade up parts
 
     my ($space,@qualifier)=split(/\./,$rwhat);
     my $qualifier=join('.',@qualifier);
@@ -2515,16 +2656,19 @@ sub parmval_real {
 
 =pod
 
-=item * B<getResourceByUrl>(url):
+=item * B<getResourceByUrl>(url,multiple):
 
-Retrieves a resource object by URL of the resource. If passed a
-resource object, it will simply return it, so it is safe to use this
-method in code like "$res = $navmap->getResourceByUrl($res)", if
-you're not sure if $res is already an object, or just a URL. If the
-resource appears multiple times in the course, only the first instance
-will be returned. As a result, this is probably useful only for maps.
+Retrieves a resource object by URL of the resource, unless the optional
+multiple parameter is included in wahich caes an array of resource 
+objects is returned. If passed a resource object, it will simply return  
+it, so it is safe to use this method in code like
+"$res = $navmap->getResourceByUrl($res)"
+if you're not sure if $res is already an object, or just a URL. If the
+resource appears multiple times in the course, only the first instance 
+will be returned (useful for maps), unless the multiple parameter has
+been included, in which case all instances are returned in an array.
 
-=item * B<retrieveResources>(map, filterFunc, recursive, bailout):
+=item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall):
 
 The map is a specification of a map to retreive the resources from,
 either as a url or as an object. The filterFunc is a reference to a
@@ -2532,13 +2676,14 @@ function that takes a resource object as
 true if the resource should be included, or false if it should not
 be. If recursive is true, the map will be recursively examined,
 otherwise it will not be. If bailout is true, the function will return
-as soon as it finds a resource, if false it will finish. By default,
-the map is the top-level map of the course, filterFunc is a function
-that always returns 1, recursive is true, bailout is false. The
-resources will be returned in a list containing the resource objects
-for the corresponding resources, with B<no structure information> in
-the list; regardless of branching, recursion, etc., it will be a flat
-list.
+as soon as it finds a resource, if false it will finish. If showall is
+true it will not hide maps that contain nothing but one other map. By
+default, the map is the top-level map of the course, filterFunc is a
+function that always returns 1, recursive is true, bailout is false,
+showall is false. The resources will be returned in a list containing
+the resource objects for the corresponding resources, with B<no
+structure information> in the list; regardless of branching,
+recursion, etc., it will be a flat list.
 
 Thus, this is suitable for cases where you don't want the structure,
 just a list of all resources. It is also suitable for finding out how
@@ -2547,31 +2692,50 @@ want to know is if I<any> resources matc
 parameter will allow you to avoid potentially expensive enumeration of
 all matching resources.
 
-=item * B<hasResource>(map, filterFunc, recursive):
+=item * B<hasResource>(map, filterFunc, recursive, showall):
 
 Convience method for
 
- scalar(retrieveResources($map, $filterFunc, $recursive, 1)) > 0
+ scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
 
 which will tell whether the map has resources matching the description
 in the filter function.
 
+=item * B<usedVersion>(url):
+
+Retrieves version infomation for a url. Returns the version (a number, or 
+the string "mostrecent") for resources which have version information in  
+the big hash.
+    
 =cut
 
 
 sub getResourceByUrl {
     my $self = shift;
     my $resUrl = shift;
+    my $multiple = shift;
 
     if (ref($resUrl)) { return $resUrl; }
 
     $resUrl = &Apache::lonnet::clutter($resUrl);
     my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
-    if ($resId =~ /,/) {
-        $resId = (split (/,/, $resId))[0];
-    }
     if (!$resId) { return ''; }
-    return $self->getById($resId);
+    if ($multiple) {
+        my @resources = ();
+        my @resIds = split (/,/, $resId);
+        foreach my $id (@resIds) {
+            my $resourceId = $self->getById($id);
+            if ($resourceId) { 
+                push(@resources,$resourceId);
+            }
+        }
+        return @resources;
+    } else {
+        if ($resId =~ /,/) {
+            $resId = (split (/,/, $resId))[0];
+        }
+        return $self->getById($resId);
+    }
 }
 
 sub retrieveResources {
@@ -2585,7 +2749,7 @@ sub retrieveResources {
     if (!defined($recursive)) { $recursive = 1; }
     my $bailout = shift;
     if (!defined($bailout)) { $bailout = 0; }
-
+    my $showall = shift;
     # Create the necessary iterator.
     if (!ref($map)) { # assume it's a url of a map.
         $map = $self->getResourceByUrl($map);
@@ -2604,7 +2768,7 @@ sub retrieveResources {
 
     # Get an iterator.
     my $it = $self->getIterator($map->map_start(), $map->map_finish(),
-                                undef, $recursive);
+                                undef, $recursive, $showall);
 
     my @resources = ();
 
@@ -2634,14 +2798,23 @@ sub hasResource {
     my $map = shift;
     my $filterFunc = shift;
     my $recursive = shift;
+    my $showall = shift;
     
-    return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1)) > 0;
+    return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
+}
+
+sub usedVersion {
+    my $self = shift;
+    my $linkurl = shift;
+    return $self->navhash("version_$linkurl");
 }
 
 1;
 
 package Apache::lonnavmaps::iterator;
-use WeakRef;
+use Scalar::Util qw(weaken);
+use Apache::lonnet;
+
 =pod
 
 =back
@@ -2901,7 +3074,8 @@ sub new {
             Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
                                               $finishResource, $self->{FILTER},
                                               $self->{ALREADY_SEEN}, 
-                                              $self->{CONDITION}, 0);
+                                              $self->{CONDITION},
+					      $self->{FORCE_TOP});
         
     }
 
@@ -3064,7 +3238,9 @@ sub next {
         $self->{RECURSIVE_ITERATOR} = 
             Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
                                               $finishResource, $self->{FILTER},
-                                              $self->{ALREADY_SEEN}, $self->{CONDITION});
+                                              $self->{ALREADY_SEEN},
+					      $self->{CONDITION},
+					      $self->{FORCE_TOP});
     }
 
     # If this is a blank resource, don't actually return it.
@@ -3117,7 +3293,9 @@ sub populateStack {
 1;
 
 package Apache::lonnavmaps::DFSiterator;
-use WeakRef;
+use Scalar::Util qw(weaken);
+use Apache::lonnet;
+
 # Not documented in the perldoc: This is a simple iterator that just walks
 #  through the nav map and presents the resources in a depth-first search
 #  fashion, ignorant of conditionals, randomized resources, etc. It presents
@@ -3299,7 +3477,7 @@ sub populateStack {
 1;
 
 package Apache::lonnavmaps::resource;
-use WeakRef;
+use Scalar::Util qw(weaken);
 use Apache::lonnet;
 
 =pod
@@ -3478,8 +3656,7 @@ sub kind { my $self=shift; return $self-
 sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
 sub randompick { 
     my $self = shift;
-    return $self->{NAV_MAP}->{PARM_HASH}->{$self->symb .
-                                               '.0.parameter_randompick'};
+    return $self->parmval('randompick');
 }
 sub link {
     my $self=shift;
@@ -3495,6 +3672,15 @@ sub shown_symb {
     if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->symb());}
     return $self->symb();
 }
+sub id {
+    my $self=shift;
+    return $self->{ID};
+}
+sub enclosing_map_src {
+    my $self=shift;
+    (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
+    return $self->navHash('map_id_'.$first);
+}
 sub symb {
     my $self=shift;
     (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
@@ -3503,12 +3689,16 @@ sub symb {
         . '___' . $second . '___' . $symbSrc;
     return &Apache::lonnet::symbclean($symb);
 }
+sub wrap_symb {
+    my $self = shift;
+    return $self->{NAV_MAP}->wrap_symb($self->symb());
+}
 sub title { 
     my $self=shift; 
     if ($self->{ID} eq '0.0') {
 	# If this is the top-level map, return the title of the course
 	# since this map can not be titled otherwise.
-	return $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
+	return $env{'course.'.$env{'request.course.id'}.'.description'};
     }
     return $self->navHash("title_", 1); }
 # considered private and undocumented
@@ -3522,7 +3712,18 @@ sub condition {
     my $condition=&Apache::lonnet::directcondval($condid);
     return $condition;
 }
+sub condval {
+    my $self=shift;
+    my ($pathname,$filename) = 
+	&Apache::lonnet::split_uri_for_cond($self->src());
 
+    my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
+	       /\&\Q$filename\E\:([\d\|]+)\&/);
+    if ($match) {
+	return &Apache::lonnet::condval($1);
+    }
+    return 0;
+}
 sub compTitle {
     my $self = shift;
     my $title = $self->title();
@@ -3573,6 +3774,16 @@ sub retrieveResources {
    return $self->{NAV_MAP}->retrieveResources(@_);
 }
 
+sub is_exam {
+    my ($self,$part) = @_;
+    if ($self->parmval('type',$part) eq 'exam') {
+        return 1;
+    }
+    if ($self->src() =~ /\.(exam)$/) {
+        return 1;
+    }
+    return 0;
+}
 sub is_html {
     my $self=shift;
     my $src = $self->src();
@@ -3585,10 +3796,21 @@ sub is_page {
     return $self->navHash("is_map_", 1) && 
 	$self->navHash("map_type_" . $self->map_pc()) eq 'page';
 }
+sub is_practice {
+    my $self=shift;
+    my ($part) = @_;
+    if ($self->parmval('type',$part) eq 'practice') {
+        return 1;
+    }
+    return 0;
+}
 sub is_problem {
     my $self=shift;
     my $src = $self->src();
-    return ($src =~ /\.(problem|exam|quiz|assess|survey|form|library)$/)
+    if ($src =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/) {
+	return !($self->is_practice());
+    }
+    return 0;
 }
 sub contains_problem {
     my $self=shift;
@@ -3615,6 +3837,11 @@ sub is_survey {
     }
     return 0;
 }
+sub is_task {
+    my $self=shift;
+    my $src = $self->src();
+    return ($src =~ /\.(task)$/)
+}
 
 sub is_empty_sequence {
     my $self=shift;
@@ -3804,6 +4031,10 @@ sub duedate {
     }
     return $self->parmval("duedate", $part);
 }
+sub handgrade {
+    (my $self, my $part) = @_;
+    return $self->parmval("handgrade", $part);
+}
 sub maxtries {
     (my $self, my $part) = @_;
     return $self->parmval("maxtries", $part);
@@ -3842,9 +4073,9 @@ sub weight {
     my $self = shift; my $part = shift;
     if (!defined($part)) { $part = '0'; }
     return &Apache::lonnet::EXT('resource.'.$part.'.weight',
-				$self->symb(), $ENV{'user.domain'},
-				$ENV{'user.name'}, 
-				$ENV{'request.course.sec'});
+				$self->symb(), $env{'user.domain'},
+				$env{'user.name'}, 
+				$env{'request.course.sec'});
 }
 sub part_display {
     my $self= shift(); my $partID = shift();
@@ -3895,6 +4126,19 @@ Returns a false value if there has been
 logged in, true if there has. Always returns false if the discussion
 data was not extracted when the nav map was constructed.
 
+=item * B<last_post_time>:
+
+Returns a false value if there hasn't been discussion otherwise returns
+unix timestamp of last time a discussion posting (or edit) was made.
+
+=item * B<unread_discussion>:
+
+returns in scalar context the count of the number of unread discussion
+postings
+
+returns in list context both the count of postings and a hash ref
+containing the subjects of all unread postings
+
 =item * B<getFeedback>:
 
 Gets the feedback for the resource and returns the raw feedback string
@@ -3915,6 +4159,16 @@ sub hasDiscussion {
     return $self->{NAV_MAP}->hasDiscussion($self->symb());
 }
 
+sub last_post_time {
+    my $self = shift;
+    return $self->{NAV_MAP}->last_post_time($self->symb());
+}
+
+sub unread_discussion {
+    my $self = shift;
+    return $self->{NAV_MAP}->unread_discussion($self->symb());
+}
+
 sub getFeedback {
     my $self = shift;
     my $source = $self->src();
@@ -4012,7 +4266,7 @@ sub countResponses {
 sub responseTypes {
     my $self = shift;
     my %responses;
-    foreach my $part ($self->parts()) {
+    foreach my $part (@{$self->parts()}) {
         foreach my $responsetype ($self->responseType($part)) {
             $responses{$responsetype}++ if (defined($responsetype));
         }
@@ -4088,7 +4342,7 @@ sub extractParts {
 		return;
 	    }
 	    foreach (split(/\,/,$metadata)) {
-		if ($_ =~ /^part_(.*)$/) {
+		if ($_ =~ /^(?:part|Task)_(.*)$/) {
 		    my $part = $1;
 		    # This floods the logs if it blows up
 		    if (defined($parts{$part})) {
@@ -4124,7 +4378,8 @@ sub extractParts {
         # where the part names begin and end, and even then, it is possible
         # to construct ambiguous situations.
         foreach (split /,/, $metadata) {
-            if ($_ =~ /^([a-zA-Z]+)response_(.*)/) {
+            if ($_ =~ /^([a-zA-Z]+)response_(.*)/
+		|| $_ =~ /^(Task)_(.*)/) {
                 my $responseType = $1;
                 my $partStuff = $2;
                 my $partIdSoFar = '';
@@ -4353,14 +4608,17 @@ sub ATTEMPTED             { return 16; }
 
 sub getCompletionStatus {
     my $self = shift;
+    my $part = shift;
     return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
 
-    my $status = $self->queryRestoreHash('solved', shift);
+    my $status = $self->queryRestoreHash('solved', $part);
 
     # Left as separate if statements in case we ever do more with this
     if ($status eq 'correct_by_student') {return $self->CORRECT;}
     if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
-    if ($status eq 'correct_by_override') {return $self->CORRECT_BY_OVERRIDE; }
+    if ($status eq 'correct_by_override') {
+	return $self->CORRECT_BY_OVERRIDE;
+    }
     if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
     if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
     if ($status eq 'excused') {return $self->EXCUSED; }
@@ -4464,6 +4722,7 @@ An answer has been submitted, but the st
 
 sub TRIES_LEFT       { return 20; }
 sub ANSWER_SUBMITTED { return 21; }
+sub PARTIALLY_CORRECT{ return 22; }
 
 sub status {
     my $self = shift;
@@ -4482,14 +4741,29 @@ sub status {
     my $suppressFeedback = $self->problemstatus($part) eq 'no';
     # If there's an answer date and we're past it, don't
     # suppress the feedback; student should know
-    if ($self->answerdate($part) && $self->answerdate($part) < time()) {
+    if ($self->duedate($part) && $self->duedate($part) < time() &&
+	$self->answerdate($part) && $self->answerdate($part) < time()) {
 	$suppressFeedback = 0;
     }
 
     # There are a few whole rows we can dispose of:
     if ($completionStatus == CORRECT ||
         $completionStatus == CORRECT_BY_OVERRIDE ) {
-        return $suppressFeedback? ANSWER_SUBMITTED : CORRECT; 
+	if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
+	my $awarded=$self->awarded($part);
+	if ($awarded < 1 && $awarded > 0) {
+            return PARTIALLY_CORRECT;
+	} elsif ($awarded<1) {
+	    return INCORRECT;
+	}
+	return CORRECT; 
+    }
+
+    # If it's WRONG... and not open
+    if ( ($completionStatus == INCORRECT || 
+	  $completionStatus == INCORRECT_BY_OVERRIDE)
+	 && (!$self->opendate($part) ||  $self->opendate($part) > time()) ) {
+	return INCORRECT;
     }
 
     if ($completionStatus == ATTEMPTED) {
@@ -4576,6 +4850,7 @@ my %compositeToSimple =
       NETWORK_FAILURE()       => ERROR,
       NOTHING_SET()           => CLOSED,
       CORRECT()               => CORRECT,
+      PARTIALLY_CORRECT()     => PARTIALLY_CORRECT,
       EXCUSED()               => CORRECT,
       PAST_DUE_NO_ANSWER()    => INCORRECT,
       PAST_DUE_ANSWER_LATER() => INCORRECT,
@@ -4696,7 +4971,7 @@ sub getNext {
     my $to = $self->to();
     foreach my $branch ( split(/,/, $to) ) {
         my $choice = $self->{NAV_MAP}->getById($branch);
-        if (!$choice->condition()) { next; }
+        #if (!$choice->condition()) { next; }
         my $next = $choice->goesto();
         $next = $self->{NAV_MAP}->getById($next);