--- loncom/interface/lonnavmaps.pm	2003/06/18 15:14:23	1.207
+++ loncom/interface/lonnavmaps.pm	2006/03/19 19:50:40	1.373
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.207 2003/06/18 15:14:23 bowersj2 Exp $
+# $Id: lonnavmaps.pm,v 1.373 2006/03/19 19:50:40 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,29 +25,21 @@
 #
 # http://www.lon-capa.org/
 #
-# (Page Handler
-#
-# (TeX Content Handler
-#
-# 05/29/00,05/30 Gerd Kortemeyer)
-# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
-# 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16 Gerd Kortemeyer)
-#
-# 3/1/1,6/1,17/1,29/1,30/1,2/8,9/21,9/24,9/25 Gerd Kortemeyer
-# YEAR=2002
-# 1/1 Gerd Kortemeyer
-# Oct-Nov Jeremy Bowers
-# YEAR=2003
-# Jeremy Bowers ... lots of days
+###
 
 package Apache::lonnavmaps;
 
 use strict;
+use GDBM_File;
 use Apache::Constants qw(:common :http);
 use Apache::loncommon();
 use Apache::lonmenu();
+use Apache::lonenc();
+use Apache::lonlocal;
+use Apache::lonnet;
 use POSIX qw (floor strftime);
-use Data::Dumper; # for debugging, not always used
+use Data::Dumper; # for debugging, not always 
+use Time::HiRes qw( gettimeofday tv_interval );
 
 # symbolic constants
 sub SYMB { return 1; }
@@ -61,19 +53,15 @@ my $resObj = "Apache::lonnavmaps::resour
 # Keep these mappings in sync with lonquickgrades, which uses the colors
 # instead of the icons.
 my %statusIconMap = 
-    ( $resObj->NETWORK_FAILURE    => '',
-      $resObj->NOTHING_SET        => '',
-      $resObj->CORRECT            => 'navmap.correct.gif',
-      $resObj->EXCUSED            => 'navmap.correct.gif',
-      $resObj->PAST_DUE_NO_ANSWER => 'navmap.wrong.gif',
-      $resObj->PAST_DUE_ANSWER_LATER => 'navmap.wrong.gif',
-      $resObj->ANSWER_OPEN        => 'navmap.wrong.gif',
-      $resObj->OPEN_LATER         => '',
-      $resObj->TRIES_LEFT         => 'navmap.open.gif',
-      $resObj->INCORRECT          => 'navmap.wrong.gif',
-      $resObj->OPEN               => 'navmap.open.gif',
-      $resObj->ATTEMPTED          => 'navmap.ellipsis.gif',
-      $resObj->ANSWER_SUBMITTED   => '' );
+    (
+     $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        => ''
+     );
 
 my %iconAltTags = 
     ( 'navmap.correct.gif' => 'Correct',
@@ -94,12 +82,69 @@ 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,$toplinkitems,$firsttime)=@_;
+    my $result;
+    if ($script ne 'no') {
+	$result.='<script type="text/javascript">';
+    }
+    if ($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') {
+	$result.="\nlaunch_navmapwin();\n";
+    }
+    if ($script ne 'no') {
+	$result.='</script>';
+    }
+    if ($mode eq 'link') {
+	&add_linkitem($toplinkitems,'launchnav','launch_navmapwin()',
+		      "Launch navigation window");
+    }
+    return $result;
+}
+
+sub close {
+    if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
+    return(<<ENDCLOSE);
+<script type="text/javascript">
+window.status='Accessing Nav Control';
+menu=window.open("/adm/rat/empty.html","loncapanav",
+                 "height=600,width=400,scrollbars=1");
+window.status='Closing Nav Control';
+menu.close();
+window.status='Done.';
+</script>
+ENDCLOSE
+}
+
+sub update {
+    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>
+<script type="text/javascript">
+this.document.navform.action='/adm/navmaps#curloc';
+this.document.navform.target='loncapanav';
+this.document.navform.submit();
+</script>
+ENDUPDATE
+}
+
 sub handler {
     my $r = shift;
     real_handler($r);
@@ -107,118 +152,192 @@ sub handler {
 
 sub real_handler {
     my $r = shift;
-
+    #my $t0=[&gettimeofday()];
     # Handle header-only request
     if ($r->header_only) {
-        if ($ENV{'browser.mathml'}) {
-            $r->content_type('text/xml');
+        if ($env{'browser.mathml'}) {
+            &Apache::loncommon::content_type($r,'text/xml');
         } else {
-            $r->content_type('text/html');
+            &Apache::loncommon::content_type($r,'text/html');
         }
         $r->send_http_header;
         return OK;
     }
 
     # Send header, don't cache this page
-    if ($ENV{'browser.mathml'}) {
-        $r->content_type('text/xml');
+    if ($env{'browser.mathml'}) {
+        &Apache::loncommon::content_type($r,'text/xml');
     } else {
-        $r->content_type('text/html');
+        &Apache::loncommon::content_type($r,'text/html');
     }
     &Apache::loncommon::no_cache($r);
-    $r->send_http_header;
 
-    # Create the nav map
-    my $navmap = Apache::lonnavmaps::navmap->new(
-                        $ENV{"request.course.fn"}.".db",
-                        $ENV{"request.course.fn"}."_parms.db", 1, 1);
+    my %toplinkitems=();
+    &add_linkitem(\%toplinkitems,'blank','',"Select Action");
+    if ($ENV{QUERY_STRING} eq 'collapseExternal') {
+	&Apache::lonnet::put('environment',{'remotenavmap' => 'off'});
+	&Apache::lonnet::appenv('environment.remotenavmap' => 'off');
+	my $menu=&Apache::lonmenu::reopenmenu();
+	my $navstatus=&Apache::lonmenu::get_nav_status();
+	if ($menu) {
+	    $menu=(<<MENU)
+             swmenu=$menu
+             swmenu.clearTimeout(swmenu.menucltim);
+	     $navstatus
+MENU
+        } else {
+	    my $nothing = &Apache::lonhtmlcommon::javascript_nothing();
+	    my $mainwindow='window.open('.$nothing.',"loncapaclient","",false);';
+	    $menu=(<<MENU)
+             swmenu=$mainwindow
+	     $navstatus
+MENU
+	}
+        $r->send_http_header;
+	my $js =<<"ENDSUBM";
+	  <script type="text/javascript">
+ 	    function submitthis() {
+		    $menu
+		    self.close();
+	    }
+	
+  	  </script>
+ENDSUBM
+        $r->print(&Apache::lonxml::xmlbegin().
+		  &Apache::loncommon::head(undef,$js).
+		  '<body bgcolor="#FFFFFF" onLoad="submitthis()">'.
+		  &Apache::loncommon::end_page(undef,$js));
+
+        return OK;
+    }
+    if ($ENV{QUERY_STRING} =~ /^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
+    my $navmap = Apache::lonnavmaps::navmap->new();
 
     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");
-    $r->print("<title>Navigate Course Contents</title>");
 # ------------------------------------------------------------ Get query string
-    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register']);
+    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register','sort','showOnlyHomework','postsymb']);
     
 # ----------------------------------------------------- Force menu registration
     my $addentries='';
-    if ($ENV{'form.register'}) {
-       $addentries=' onLoad="'.&Apache::lonmenu::loadevents().
-	   '" onUnload="'.&Apache::lonmenu::unloadevents().'"';
-       $r->print(&Apache::lonmenu::registerurl(1));
+    my $more_unload;
+    my $body_only='';
+    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'}) {
+	$addentries=' onLoad="'.&Apache::lonmenu::loadevents().
+	    '" onUnload="'.&Apache::lonmenu::unloadevents().';'.
+	    $more_unload.'"';
+	$r->print(&Apache::lonmenu::registerurl(1));
+    } else {
+	$addentries=' onUnload="'.$more_unload.'"';
     }
 
     # Header
-    $r->print('</head>'.
+    $r->print(&Apache::lonxml::xmlbegin().
+	      &Apache::loncommon::head('Navigate Course Contents',$js).
               &Apache::loncommon::bodytag('Navigate Course Contents','',
-                                    $addentries,'','',$ENV{'form.register'}));
+					  $addentries,$body_only,'',
+					  $env{'form.register'}));
     $r->print('<script>window.focus();</script>');
-
-    $r->rflush();
-
-    # Now that we've displayed some stuff to the user, init the navmap
-    $navmap->init();
-
+     
     $r->rflush();
 
     # Check that it's defined
     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;
     }
 
     # See if there's only one map in the top-level, if we don't
     # already have a filter... if so, automatically display it
+    # (older code; should use retrieveResources)
     if ($ENV{QUERY_STRING} !~ /filter/) {
         my $iterator = $navmap->getIterator(undef, undef, undef, 0);
-        my $depth = 1;
-        $iterator->next();
-        my $curRes = $iterator->next();
+        my $curRes;
         my $sequenceCount = 0;
         my $sequenceId;
-        while ($depth > 0) {
-            if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
-            if ($curRes == $iterator->END_MAP()) { $depth--; }
-            
+        while ($curRes = $iterator->next()) {
             if (ref($curRes) && $curRes->is_sequence()) {
                 $sequenceCount++;
                 $sequenceId = $curRes->map_pc();
             }
-            
-            $curRes = $iterator->next();
         }
         
         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=navlaunch%3a" 
+                method="post" target="loncapaclient">
+          </form>');
+	$r->print('
+          <script type="text/javascript">
+              this.document.returnwin.submit();
+          </script>');
+    }
+
+    if ($env{'environment.remotenavmap'} ne 'on') {
+	$r->print(&launch_win('link','yes',\%toplinkitems));
+    } 
+    if ($env{'environment.remotenavmap'} eq 'on') {
+	&add_linkitem(\%toplinkitems,'closenav','collapse()',
+		      "Close navigation window");
+    } 
+
     my $jumpToFirstHomework = 0;
     # Check to see if the student is jumping to next open, do-able problem
-    if ($ENV{QUERY_STRING} eq 'jumpToFirstHomework') {
+    if ($ENV{QUERY_STRING} =~ /^jumpToFirstHomework/) {
         $jumpToFirstHomework = 1;
         # Find the next homework problem that they can do.
         my $iterator = $navmap->getIterator(undef, undef, undef, 1);
-        my $depth = 1;
-        $iterator->next();
-        my $curRes = $iterator->next();
+        my $curRes;
         my $foundDoableProblem = 0;
         my $problemRes;
         
-        while ($depth > 0 && !$foundDoableProblem) {
-            if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
-            if ($curRes == $iterator->END_MAP()) { $depth--; }
-
+        while (($curRes = $iterator->next()) && !$foundDoableProblem) {
             if (ref($curRes) && $curRes->is_problem()) {
                 my $status = $curRes->status();
                 if ($curRes->completable()) {
@@ -230,14 +349,12 @@ sub real_handler {
                     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();
                 }
             }
-        } continue {
-            $curRes = $iterator->next();
         }
 
         # If we found no problems, print a note to that effect.
@@ -245,8 +362,9 @@ sub real_handler {
             $r->print("<font size='+2'>All homework assignments have been completed.</font><br /><br />");
         }
     } else {
-        $r->print("<a href='navmaps?jumpToFirstHomework'>" .
-                  "Go To My First Homework Problem</a>&nbsp;&nbsp;&nbsp;&nbsp;");
+	&add_linkitem(\%toplinkitems,'firsthomework',
+		      'location.href="navmaps?jumpToFirstHomework"',
+		      "Show Me My First Homework Problem");
     }
 
     my $suppressEmptySequences = 0;
@@ -255,44 +373,67 @@ sub real_handler {
 
     # Display only due homework.
     my $showOnlyHomework = 0;
-    if ($ENV{QUERY_STRING} eq 'showOnlyHomework') {
+    if ($env{'form.showOnlyHomework'} eq "1") {
         $showOnlyHomework = 1;
         $suppressEmptySequences = 1;
         $filterFunc = sub { my $res = shift; 
                             return $res->completable() || $res->is_map();
                         };
-        $r->print("<p><font size='+2'>Uncompleted Homework</font></p>");
-        $ENV{'form.filter'} = '';
-        $ENV{'form.condition'} = 1;
+	&add_linkitem(\%toplinkitems,'everything',
+		     'location.href="navmaps?sort='.$env{'form.sort'}.'"',
+		      "Show Everything");
+        $r->print("<p><font size='+2'>".&mt("Uncompleted Homework")."</font></p>");
+        $env{'form.filter'} = '';
+        $env{'form.condition'} = 1;
 	$resource_no_folder_link = 1;
     } else {
-        $r->print("<a href='navmaps?showOnlyHomework'>" .
-                  "Show Only Uncompleted Homework</a>&nbsp;&nbsp;&nbsp;&nbsp;");
-    }
-
+	&add_linkitem(\%toplinkitems,'uncompleted',
+		      'location.href="navmaps?sort='.$env{'form.sort'}.
+		          '&showOnlyHomework=1"',
+		      "Show Only Uncompleted Homework");
+    }
+
+    my %selected=($env{'form.sort'} => 'selected=on');
+    my $sort_html=("<form>
+                 <nobr>
+                    <input type=\"hidden\" name=\"showOnlyHomework\" value=\"".$env{'form.showOnlyHomework'}."\" />
+                    <input type=\"submit\" value=\"".&mt('Sort by:')."\" />
+                    <select name=\"sort\">
+                       <option value=\"default\" $selected{'default'}>".&mt('Default')."</option>
+                       <option value=\"title\"   $selected{'title'}  >".&mt('Title')."</option>
+                       <option value=\"duedate\" $selected{'duedate'}>".&mt('Duedate')."</option>
+                       <option value=\"discussion\" $selected{'discussion'}>".&mt('Has New Discussion')."</option>
+                    </select>
+                 </nobr>
+               </form>");
     # renderer call
     my $renderArgs = { 'cols' => [0,1,2,3],
+		       'sort' => $env{'form.sort'},
                        'url' => '/adm/navmaps',
                        'navmap' => $navmap,
                        'suppressNavmap' => 1,
                        'suppressEmptySequences' => $suppressEmptySequences,
                        'filterFunc' => $filterFunc,
 		       'resource_no_folder_link' => $resource_no_folder_link,
-                       'r' => $r};
+		       'sort_html'=> $sort_html,
+                       'r' => $r,
+                       'caller' => 'navmapsdisplay',
+                       'linkitems' => \%toplinkitems};
     my $render = render($renderArgs);
-    $navmap->untieHashes();
 
     # If no resources were printed, print a reassuring message so the
     # user knows there was no error.
     if ($renderArgs->{'counter'} == 0) {
         if ($showOnlyHomework) {
-            $r->print("<p><font size='+1'>All homework is currently completed.</font></p>");
+            $r->print("<p><font size='+1'>".&mt("All homework is currently completed").".</font></p>");
         } else { # both jumpToFirstHomework and normal use the same: course must be empty
             $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;
@@ -321,15 +462,26 @@ sub removeFromFilter {
 
 # Convenience function: Given a stack returned from getStack on the iterator,
 # return the correct src() value.
-# Later, this should add an anchor when we start putting anchors in pages.
 sub getLinkForResource {
     my $stack = shift;
     my $res;
 
     # Check to see if there are any pages in the stack
     foreach $res (@$stack) {
-        if (defined($res) && $res->is_page()) {
-            return $res->src();
+        if (defined($res)) {
+	    my $anchor;
+	    if ($res->is_page()) {
+		foreach (@$stack) { if (defined($_)) { $anchor = $_; }  }
+		$anchor=&Apache::lonnet::escape($anchor->shown_symb());
+		return ($res->link(),$res->shown_symb(),$anchor);
+	    }
+            # in case folder was skipped over as "only sequence"
+	    my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
+	    if ($map=~/\.page$/) {
+		my $url=&Apache::lonnet::clutter($map);
+		$anchor=&Apache::lonnet::escape($src->shown_symb());
+		return ($url,$res->shown_symb(),$anchor);
+	    }
         }
     }
 
@@ -341,12 +493,12 @@ sub getLinkForResource {
         if (defined($_)) { $res = $_; }
     }
 
-    return $res->src();
+    return ($res->link(),$res->shown_symb());
 }
 
-# Convenience function: This seperates the logic of how to create
+# Convenience function: This separates the logic of how to create
 # the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
-# etc.) into a seperate function. It takes a resource object as the
+# etc.) into a separate function. It takes a resource object as the
 # first parameter, and the part number of the resource as the second.
 # It's basically a big switch statement on the status of the resource.
 
@@ -356,35 +508,36 @@ sub getDescription {
     my $status = $res->status($part);
 
     if ($status == $res->NETWORK_FAILURE) { 
-        return "Having technical difficulties; please check status later"; 
+        return &mt("Having technical difficulties; please check status later"); 
     }
     if ($status == $res->NOTHING_SET) {
-        return "Not currently assigned.";
+        return &mt("Not currently assigned.");
     }
     if ($status == $res->OPEN_LATER) {
-        return "Open " . timeToHumanString($res->opendate($part));
+        return "Open " . timeToHumanString($res->opendate($part),'start');
     }
     if ($status == $res->OPEN) {
         if ($res->duedate($part)) {
-            return "Due " . timeToHumanString($res->duedate($part));
+            return &mt("Due")."  " .timeToHumanString($res->duedate($part),'end');
         } else {
-            return "Open, no due date";
+            return &mt("Open, no due date");
         }
     }
     if ($status == $res->PAST_DUE_ANSWER_LATER) {
-        return "Answer open " . timeToHumanString($res->answerdate($part));
+        return &mt("Answer open")." " . timeToHumanString($res->answerdate($part),'start');
     }
     if ($status == $res->PAST_DUE_NO_ANSWER) {
-        return "Was due " . timeToHumanString($res->duedate($part));
+        return &mt("Was due")." " . timeToHumanString($res->duedate($part),'end');
     }
-    if ($status == $res->ANSWER_OPEN) {
-        return "Answer available";
+    if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
+	&& $res->handgrade($part) ne 'yes') {
+        return &mt("Answer available");
     }
     if ($status == $res->EXCUSED) {
-        return "Excused by instructor";
+        return &mt("Excused by instructor");
     }
     if ($status == $res->ATTEMPTED) {
-        return "Answer submitted, not yet graded.";
+        return &mt("Answer submitted, not yet graded");
     }
     if ($status == $res->TRIES_LEFT) {
         my $tries = $res->tries($part);
@@ -396,30 +549,30 @@ sub getDescription {
                 $triesString = "<b>$triesString</b>";
             }
         }
-        if ($res->duedate()) {
-            return "Due " . timeToHumanString($res->duedate($part)) .
+        if ($res->duedate($part)) {
+            return &mt("Due")." " . timeToHumanString($res->duedate($part),'end') .
                 " $triesString";
         } else {
-            return "No due date $triesString";
+            return &mt("No due date")." $triesString";
         }
     }
     if ($status == $res->ANSWER_SUBMITTED) {
-        return 'Answer submitted';
+        return &mt('Answer submitted');
     }
 }
 
 # Convenience function, so others can use it: Is the problem due in less then
 # 24 hours, and still can be done?
 
-sub dueInLessThen24Hours {
+sub dueInLessThan24Hours {
     my $res = shift;
     my $part = shift;
     my $status = $res->status($part);
 
     return ($status == $res->OPEN() ||
             $status == $res->TRIES_LEFT()) &&
-           $res->duedate() && $res->duedate() < time()+(24*60*60) &&
-           $res->duedate() > time();
+	    $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
+	    $res->duedate($part) > time();
 }
 
 # Convenience function, so others can use it: Is there only one try remaining for the
@@ -431,14 +584,14 @@ sub lastTry {
     my $tries = $res->tries($part);
     my $maxtries = $res->maxtries($part);
     return $tries && $maxtries && $maxtries > 1 &&
-        $maxtries - $tries == 1 && $res->duedate() &&
-        $res->duedate() > time();
+        $maxtries - $tries == 1 && $res->duedate($part) &&
+        $res->duedate($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'};
 }
 
 
@@ -450,13 +603,18 @@ 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 'never';
+        return &mt('never');
     }
-
+    unless (&Apache::lonlocal::current_language()=~/^en/) {
+	return &Apache::lonlocal::locallocaltime($time);
+    } 
     my $now = time();
 
     my @time = localtime($time);
@@ -520,30 +678,44 @@ sub timeToHumanString {
             return "$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/midnight/;
+            $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));
-            $timeStr =~ s/12:00 am/midnight/;
+            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 $timeStr = strftime("on %A, %b %e %G at %I:%M %P", localtime($time));
-        $timeStr =~ s/12:00 am/midnight/;
+        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();
     }
 }
 
@@ -552,7 +724,8 @@ sub timeToHumanString {
 
 =head1 NAME
 
-Apache::lonnavmap - Subroutines to handle and render the navigation maps
+Apache::lonnavmap - Subroutines to handle and render the navigation
+    maps
 
 =head1 SYNOPSIS
 
@@ -560,18 +733,62 @@ The main handler generates the navigatio
 the other objects export this information in a usable fashion for
 other modules.
 
+=head1 OVERVIEW
+
+X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
+course structure and caches it in what is often referred to as the
+"big hash" X<big hash>. You can see it if you are logged into
+LON-CAPA, in a course, by going to /adm/test. (You may need to
+tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
+content of the hash will be under the heading "Big Hash".
+
+Big Hash contains, among other things, how resources are related
+to each other (next/previous), what resources are maps, which 
+resources are being chosen to not show to the student (for random
+selection), and a lot of other things that can take a lot of time
+to compute due to the amount of data that needs to be collected and
+processed.
+
+Apache::lonnavmaps provides an object model for manipulating this
+information in a higher-level fashion then directly manipulating 
+the hash. It also provides access to several auxilary functions 
+that aren't necessarily stored in the Big Hash, but are a per-
+resource sort of value, like whether there is any feedback on 
+a given resource.
+
+Apache::lonnavmaps also abstracts away branching, and someday, 
+conditions, for the times where you don't really care about those
+things.
+
+Apache::lonnavmaps also provides fairly powerful routines for
+rendering navmaps, and last but not least, provides the navmaps
+view for when the user clicks the NAV button.
+
+B<Note>: Apache::lonnavmaps I<only> works for the "currently
+logged in user"; if you want things like "due dates for another
+student" lonnavmaps can not directly retrieve information like
+that. You need the EXT function. This module can still help,
+because many things, such as the course structure, are constant
+between users, and Apache::lonnavmaps can help by providing
+symbs for the EXT call.
+
+The rest of this file will cover the provided rendering routines, 
+which can often be used without fiddling with the navmap object at
+all, then documents the Apache::lonnavmaps::navmap object, which
+is the key to accessing the Big Hash information, covers the use
+of the Iterator (which provides the logic for traversing the 
+somewhat-complicated Big Hash data structure), documents the
+Apache::lonnavmaps::Resource objects that are returned by 
+
 =head1 Subroutine: render
 
 The navmap renderer package provides a sophisticated rendering of the
 standard navigation maps interface into HTML. The provided nav map
 handler is actually just a glorified call to this.
 
-Because of the large number of parameters this function presents,
+Because of the large number of parameters this function accepts,
 instead of passing it arguments as is normal, pass it in an anonymous
-hash with the given options. This is because there is no obvious order
-you may wish to override these in and a hash is easier to read and
-understand then "undef, undef, undef, 1, undef, undef, renderButton,
-undef, 0" when you mostly want default behaviors.
+hash with the desired options.
 
 The package provides a function called 'render', called as
 Apache::lonnavmaps::render({}).
@@ -599,29 +816,33 @@ that takes a resource reference, a part
 argument hash passed to the renderer, and returns a string that will
 be inserted into the HTML representation as it.
 
+All other parameters are ways of either changing how the columns
+are printing, or which rows are shown.
+
 The pre-packaged column names are refered to by constants in the
 Apache::lonnavmaps namespace. The following currently exist:
 
 =over 4
 
-=item * B<resource>:
+=item * B<Apache::lonnavmaps::resource>:
 
 The general info about the resource: Link, icon for the type, etc. The
-first column in the standard nav map display. This column also accepts
+first column in the standard nav map display. This column provides the
+indentation effect seen in the B<NAV> screen. This column also accepts
 the following parameters in the renderer hash:
 
 =over 4
 
-=item * B<resource_nolink>:
+=item * B<resource_nolink>: default false
 
-If true, the resource will not be linked. Default: false, resource
-will have links.
+If true, the resource will not be linked. By default, all non-folder
+resources are linked.
 
-=item * B<resource_part_count>:
+=item * B<resource_part_count>: default true
 
-If true (default), the resource will show a part count if the full
-part list is not displayed. If false, the resource will never show a
-part count.
+If true, the resource will show a part count B<if> the full
+part list is not displayed. (See "condense_parts" later.) If false,
+the resource will never show a part count.
 
 =item * B<resource_no_folder_link>:
 
@@ -631,23 +852,38 @@ can't close or open folders when this is
 
 =back
 
-=item B<communication_status>:
+=item * B<Apache::lonnavmaps::communication_status>:
 
 Whether there is discussion on the resource, email for the user, or
 (lumped in here) perl errors in the execution of the problem. This is
 the second column in the main nav map.
 
-=item B<quick_status>:
+=item * B<Apache::lonnavmaps::quick_status>:
 
-An icon for the status of a problem, with four possible states:
-Correct, incorrect, open, or none (not open yet, not a problem). The
+An icon for the status of a problem, with five possible states:
+Correct, incorrect, open, awaiting grading (for a problem where the
+computer's grade is suppressed, or the computer can't grade, like
+essay problem), or none (not open yet, not a problem). The
 third column of the standard navmap.
 
-=item B<long_status>:
+=item * B<Apache::lonnavmaps::long_status>:
 
 A text readout of the details of the current status of the problem,
 such as "Due in 22 hours". The fourth column of the standard navmap.
 
+=item * B<Apache::lonnavmaps::part_status_summary>:
+
+A text readout summarizing the status of the problem. If it is a
+single part problem, will display "Correct", "Incorrect", 
+"Not yet open", "Open", "Attempted", or "Error". If there are
+multiple parts, this will output a string that in HTML will show a
+status of how many parts are in each status, in color coding, trying
+to match the colors of the icons within reason.
+
+Note this only makes sense if you are I<not> showing parts. If 
+C<showParts> is true (see below), this column will not output
+anything. 
+
 =back
 
 If you add any others please be sure to document them here.
@@ -666,9 +902,7 @@ to override vertical and horizontal alig
 
 =head2 Parameters
 
-Most of these parameters are only useful if you are *not* using the
-folder interface (i.e., the default first column), which is probably
-the common case. If you are using this interface, then you should be
+Minimally, you should be
 able to get away with just using 'cols' (to specify the columns
 shown), 'url' (necessary for the folders to link to the current screen
 correctly), and possibly 'queryString' if your app calls for it. In
@@ -677,115 +911,115 @@ automatically.
 
 =over 4
 
-=item * B<iterator>:
+=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>:
+=item * B<iterator_map>: default: not used
 
 If you are letting the renderer do the iterator handling, you can
 instruct the renderer to render only a particular map by passing it
 the source of the map you want to process, like
 '/res/103/jerf/navmap.course.sequence'.
 
-=item * B<navmap>:
+=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>:
+=item * B<r>: default: must be passed in
 
 The standard Apache response object. This must be passed to the
 renderer or the course hash will be locked.
 
-=item * B<cols>:
+=item * B<cols>: default: empty (useless)
 
 An array reference
 
-=item * B<showParts>:
+=item * B<showParts>:default true
 
-A flag. If yes (default), a line for the resource itself, and a line
+A flag. If true, a line for the resource itself, and a line
 for each part will be displayed. If not, only one line for each
 resource will be displayed.
 
-=item * B<condenseParts>:
+=item * B<condenseParts>: default true
 
-A flag. If yes (default), if all parts of the problem have the same
+A flag. If true, if all parts of the problem have the same
 status and that status is Nothing Set, Correct, or Network Failure,
 then only one line will be displayed for that resource anyhow. If no,
 all parts will always be displayed. If showParts is 0, this is
 ignored.
 
-=item * B<jumpCount>:
+=item * B<jumpCount>: default: determined from %env
 
-A string identifying the URL to place the anchor 'curloc' at. Default
-to no anchor at all. It is the responsibility of the renderer user to
+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>:
+=item * B<here>: default: empty string
 
-A Symb identifying where to place the 'here' marker. Default empty,
-which means no marker.
+A Symb identifying where to place the 'here' marker. The empty
+string means no marker.
 
-=item * B<indentString>:
+=item * B<indentString>: default: 25 pixel whitespace image
 
-A string identifying the indentation string to use. By default, this
-is a 25 pixel whitespace image with no alt text.
+A string identifying the indentation string to use. 
 
-=item * B<queryString>:
+=item * B<queryString>: default: empty
 
 A string which will be prepended to the query string used when the
-folders are opened or closed.
+folders are opened or closed. You can use this to pass
+application-specific values.
 
-=item * B<url>:
+=item * B<url>: default: none
 
 The url the folders will link to, which should be the current
-page. Required if the resource info column is shown.
+page. Required if the resource info column is shown, and you 
+are allowing the user to open and close folders.
 
-=item * B<currentJumpIndex>:
+=item * B<currentJumpIndex>: default: no jumping
 
 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>:
+=item * B<printKey>: default: false
 
 If true, print the key that appears on the top of the standard
-navmaps. Default is false.
+navmaps.
 
-=item * B<printCloseAll>:
+=item * B<printCloseAll>: default: true
 
 If true, print the "Close all folders" or "open all folders"
-links. Default is true.
+links.
 
-=item * B<filterFunc>:
+=item * B<filterFunc>: default: sub {return 1;} (accept everything)
 
 A function that takes the resource object as its only parameter and
 returns a true or false value. If true, the resource is displayed. If
-false, it is simply skipped in the display. By default, all resources
-are shown.
+false, it is simply skipped in the display.
 
-=item * B<suppressEmptySequences>:
+=item * B<suppressEmptySequences>: default: false
 
 If you're using a filter function, and displaying sequences to orient
 the user, then frequently some sequences will be empty. Setting this to
 true will cause those sequences not to display, so as not to confuse the
 user into thinking that if the sequence is there there should be things
-under it.
+under it; for example, see the "Show Uncompleted Homework" view on the
+B<NAV> screen.
 
-=item * B<suppressNavmaps>:
+=item * B<suppressNavmaps>: default: false
 
-If true, will not display Navigate Content resources. Default to
-false.
+If true, will not display Navigate Content resources. 
 
 =back
 
@@ -796,13 +1030,19 @@ be passed through unchange to the column
 generate the following information which your renderer may find
 useful:
 
-If you want to know how many rows were printed, the 'counter' element
-of the hash passed into the render function will contain the
-count. You may want to check whether any resources were printed at
-all.
-
 =over 4
 
+=item * B<counter>: 
+
+Contains the number of rows printed. Useful after calling the render 
+function, as you can detect whether anything was printed at all.
+
+=item * B<isNewBranch>:
+
+Useful for renderers: If this resource is currently the first resource
+of a new branch, this will be true. The Resource column (leftmost in the
+navmaps screen) uses this to display the "new branch" icon 
+
 =back
 
 =cut
@@ -811,8 +1051,7 @@ sub resource { return 0; }
 sub communication_status { return 1; }
 sub quick_status { return 2; }
 sub long_status { return 3; }
-
-# Data for render_resource
+sub part_status_summary { return 4; }
 
 sub render_resource {
     my ($resource, $part, $params) = @_;
@@ -820,43 +1059,47 @@ sub render_resource {
     my $nonLinkedText = ''; # stuff after resource title not in link
 
     my $link = $params->{"resourceLink"};
+
+    #  The URL part is not escaped at this point, but the symb is... 
+    #  The stuff to the left of the ? must have ' replaced by \' since
+    #  it will be quoted with ' in the href.
+
+    my ($left,$right) = split(/\?/, $link);
+    $link = $left.'?'.$right;
+
     my $src = $resource->src();
     my $it = $params->{"iterator"};
     my $filter = $it->{FILTER};
 
     my $title = $resource->compTitle();
-    if ($src =~ /^\/uploaded\//) {
-        $nonLinkedText=$title;
-        $title = '';
-    }
+
     my $partLabel = "";
     my $newBranchText = "";
-    
+    my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
     # If this is a new branch, label it so
     if ($params->{'isNewBranch'}) {
-        $newBranchText = "<img src='/adm/lonIcons/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='/adm/lonIcons/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="/adm/lonIcons/problem.gif" alt="" border="0" />';
+            $icon ='<img src="'.$location.'/problem.gif" alt="'.&mt('Problem').'" border="0" />';
         } else {
             $icon = $params->{'indentString'};
         }
     } else {
-	my $curfext= (split (/\./,$resource->src))[-1];
-	my $embstyle = &Apache::loncommon::fileembstyle($curfext);
-	# The unless conditional that follows is a bit of overkill
-	if (!(!defined($embstyle) || $embstyle eq 'unk' || $embstyle eq 'hdn')) {
-	    $icon = "<img src='/adm/lonIcons/$curfext.gif' 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
@@ -868,12 +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';
-            $icon = "<img src='/adm/lonIcons/$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, $mapId) :
@@ -883,12 +1128,14 @@ sub render_resource {
                 &Apache::lonnet::escape($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';
-            $icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";
+            $icon = "<img src='$location/$icon' alt=\"".
+		($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
 
             $linkopen = "";
             $linkclose = "";
@@ -896,7 +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
@@ -911,6 +1161,7 @@ sub render_resource {
     }
 
     # Decide what to display
+
     $result .= "$newBranchText$linkopen$icon$linkclose";
     
     my $curMarkerBegin = '';
@@ -919,24 +1170,29 @@ sub render_resource {
     # Is this the current resource?
     if (!$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;
     }
 
     if ($resource->is_problem() && $part ne '0' && 
         !$params->{'condensed'}) {
-        $partLabel = " (Part $part)";
+	my $displaypart=$resource->part_display($part);
+        $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()).')';
     }
 
-    if (!$params->{'resource_nolink'} && $src !~ /^\/uploaded\// &&
-	!$resource->is_sequence()) {
-        $result .= "  $curMarkerBegin<a href='$link'>$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
+    my $target;
+    if ($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>";
     } else {
         $result .= "  $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
     }
@@ -949,12 +1205,16 @@ 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()) {
         $discussionHTML = $linkopen .
-            '<img border="0" src="/adm/lonMisc/chat.gif" />' .
+            '<img border="0" src="'.$location.'/chat.gif" />' .
             $linkclose;
     }
     
@@ -962,9 +1222,9 @@ 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($_) . '">'
-                    . '<img src="/adm/lonMisc/feedback.gif" '
+                    . '<img src="'.$location.'/feedback.gif" '
                     . 'border="0" /></a>';
             }
         }
@@ -972,11 +1232,14 @@ sub render_communication_status {
     
     if ($resource->getErrors()) {
         my $errors = $resource->getErrors();
+        my $errorcount = 0;
         foreach (split(/,/, $errors)) {
+            last if ($errorcount>=10); # Only output 10 bombs maximum
             if ($_) {
-                $errorHTML .= '&nbsp;<a href="/adm/email?display='
+                $errorcount++;
+                $errorHTML .= '&nbsp;<a '.$target.' href="/adm/email?display='
                     . &Apache::lonnet::escape($_) . '">'
-                    . '<img src="/adm/lonMisc/bomb.gif" '
+                    . '<img src="'.$location.'/bomb.gif" '
                     . 'border="0" /></a>';
             }
         }
@@ -996,15 +1259,22 @@ 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 ($resource->is_problem() &&
         !$firstDisplayed) {
-        my $icon = $statusIconMap{$resource->status($part)};
+	
+        my $icon = $statusIconMap{$resource->simpleStatus($part)};
         my $alt = $iconAltTags{$icon};
         if ($icon) {
-            $result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='/adm/lonIcons/$icon' border='0' alt='$alt' />$linkclose</td>\n";
+	    my $location=
+		&Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
+            $result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='$location' border='0' alt='$alt' />$linkclose</td>\n";
         } else {
             $result .= "<td width='30'>&nbsp;</td>\n";
         }
@@ -1021,10 +1291,10 @@ sub render_long_status {
         $params->{'multipart'} && $part eq "0";
                 
     my $color;
-    if ($resource->is_problem() && ($resource->countParts() <= 1) ) {
+    if ($resource->is_problem()) {
         $color = $colormap{$resource->status};
         
-        if (dueInLessThen24Hours($resource, $part) ||
+        if (dueInLessThan24Hours($resource, $part) ||
             lastTry($resource, $part)) {
             $color = $hurryUpColor;
         }
@@ -1040,12 +1310,94 @@ sub render_long_status {
     if ($resource->is_map() && advancedUser() && $resource->randompick()) {
         $result .= '(randomly select ' . $resource->randompick() .')';
     }
+
+    # Debugging code
+    #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
+    #	' - Part: ' . $part;
+
+    $result .= "</td>\n";
     
     return $result;
 }
 
+# Colors obtained by taking the icons, matching the colors, and
+# possibly reducing the Value (HSV) of the color, if it's too bright
+# for text, generally by one third or so.
+my %statusColors = 
+    (
+     $resObj->CLOSED => '#000000',
+     $resObj->OPEN   => '#998b13',
+     $resObj->CORRECT => '#26933f',
+     $resObj->INCORRECT => '#c48207',
+     $resObj->ATTEMPTED => '#a87510',
+     $resObj->ERROR => '#000000'
+     );
+my %statusStrings = 
+    (
+     $resObj->CLOSED => 'Not yet open',
+     $resObj->OPEN   => 'Open',
+     $resObj->CORRECT => 'Correct',
+     $resObj->INCORRECT => 'Incorrect',
+     $resObj->ATTEMPTED => 'Attempted',
+     $resObj->ERROR => 'Network Error'
+     );
+my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
+
+use Data::Dumper;
+sub render_parts_summary_status {
+    my ($resource, $part, $params) = @_;
+    if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
+    if ($params->{showParts}) { 
+	return '<td></td>';
+    }
+
+    my $td = "<td align='right'>\n";
+    my $endtd = "</td>\n";
+    my @probs;
+
+    if ($resource->contains_problem) {
+	@probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
+    } else {
+	@probs=($resource);
+    }
+    my $return;
+    my %overallstatus;
+    my $totalParts;
+    foreach my $resource (@probs) {
+	# If there is a single part, just show the simple status
+	if ($resource->singlepart()) {
+	    my $status = $resource->simpleStatus(${$resource->parts}[0]);
+	    $overallstatus{$status}++;
+	    $totalParts++;
+	    next;
+	}
+	# Now we can be sure the $part doesn't really matter.
+	my $statusCount = $resource->simpleStatusCount();
+	my @counts;
+	foreach my $status (@statuses) {
+	    # decouple display order from the simpleStatusCount order
+	    my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
+	    if ($statusCount->[$slot]) {
+		$overallstatus{$status}+=$statusCount->[$slot];
+		$totalParts+=$statusCount->[$slot];
+	    }
+	}
+    }
+    $return.= $td . $totalParts . ' parts: ';
+    foreach my $status (@statuses) {
+	if ($overallstatus{$status}) {
+	    $return.="<font color='" . $statusColors{$status} .
+		"'>" . $overallstatus{$status} . ' '
+		. $statusStrings{$status} . "</font>";
+	}
+    }
+    $return.= $endtd;
+    return $return;
+}
+
 my @preparedColumns = (\&render_resource, \&render_communication_status,
-                       \&render_quick_status, \&render_long_status);
+                       \&render_quick_status, \&render_long_status,
+		       \&render_parts_summary_status);
 
 sub setDefault {
     my ($val, $default) = @_;
@@ -1053,18 +1405,23 @@ sub setDefault {
     return $val;
 }
 
+sub cmp_title {
+    my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
+    $atitle=~s/^\s*//;
+    $btitle=~s/^\s*//;
+    return $atitle cmp $btitle;
+}
+
 sub render {
     my $args = shift;
     &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
     my $result = '';
-
     # Configure the renderer.
     my $cols = $args->{'cols'};
     if (!defined($cols)) {
         # no columns, no nav maps.
         return '';
     }
-    my $mustCloseNavMap = 0;
     my $navmap;
     if (defined($args->{'navmap'})) {
         $navmap = $args->{'navmap'};
@@ -1075,6 +1432,7 @@ sub render {
     my $jump = $args->{'jump'};
     my $here = $args->{'here'};
     my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
+    my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
     my $currentJumpDelta = 2; # change this to change how many resources are displayed
                              # before the current resource when using #current
 
@@ -1084,7 +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";
         }
@@ -1104,48 +1462,53 @@ 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(
-                        $ENV{"request.course.fn"}.".db",
-                        $ENV{"request.course.fn"}."_parms.db", 1, 1);
-            $mustCloseNavMap = 1;
-        }
-        $navmap->init();
+            $navmap = Apache::lonnavmaps::navmap->new();
+	    if (!defined($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 = $ENV{'form.postsymb'};
-        } elsif ($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);
-        my $depth = 1;
-        $mapIterator->next(); # discard the first BEGIN_MAP
-        my $curRes = $mapIterator->next();
+        my $curRes;
         my $found = 0;
         
         # We only need to do this if we need to open the maps to show the
         # current position. This will change the counter so we can't count
         # for the jump marker with this loop.
-        while ($depth > 0 && !$found) {
-            if ($curRes == $mapIterator->BEGIN_MAP()) { $depth++; }
-            if ($curRes == $mapIterator->END_MAP()) { $depth--; }
-            
+        while ($here && ($curRes = $mapIterator->next()) && !$found) {
             if (ref($curRes) && $curRes->symb() eq $here) {
                 my $mapStack = $mapIterator->getStack();
                 
@@ -1159,31 +1522,24 @@ sub render {
                 }
                 $found = 1;
             }
-            
-            $curRes = $mapIterator->next();
         }            
     }        
 
-    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)) {
-            $navmap = Apache::lonnavmaps::navmap->new($r, 
-                        $ENV{"request.course.fn"}.".db",
-                        $ENV{"request.course.fn"}."_parms.db", 1, 1);
-            $mustCloseNavMap = 1;
+            $navmap = Apache::lonnavmaps::navmap->new();
         }
-        # Paranoia: Make sure it's ready
-        $navmap->init();
 
         # See if we're being passed a specific map
         if ($args->{'iterator_map'}) {
@@ -1197,20 +1553,16 @@ sub render {
             $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition);
         }
     }
-    
+
     # (re-)Locate the jump point, if any
     # Note this does not take filtering or hidden into account... need
     # to be fixed?
     my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
-    my $depth = 1;
-    $mapIterator->next();
-    my $curRes = $mapIterator->next();
+    my $curRes;
     my $foundJump = 0;
     my $counter = 0;
     
-    while ($depth > 0 && !$foundJump) {
-        if ($curRes == $mapIterator->BEGIN_MAP()) { $depth++; }
-        if ($curRes == $mapIterator->END_MAP()) { $depth--; }
+    while (($curRes = $mapIterator->next()) && !$foundJump) {
         if (ref($curRes)) { $counter++; }
         
         if (ref($curRes) && $jump eq $curRes->symb()) {
@@ -1221,8 +1573,6 @@ sub render {
             $args->{'currentJumpIndex'} = $counter;
             $foundJump = 1;
         }
-        
-        $curRes = $mapIterator->next();
     }
 
     my $showParts = setDefault($args->{'showParts'}, 1);
@@ -1233,23 +1583,24 @@ sub render {
     my $printKey = $args->{'printKey'};
     my $printCloseAll = $args->{'printCloseAll'};
     if (!defined($printCloseAll)) { $printCloseAll = 1; }
-    
+
     # Print key?
     if ($printKey) {
         $result .= '<table border="0" cellpadding="2" cellspacing="0">';
         my $date=localtime;
         $result.='<tr><td align="right" valign="bottom">Key:&nbsp;&nbsp;</td>';
+	my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
         if ($navmap->{LAST_CHECK}) {
             $result .= 
-                '<img src="/adm/lonMisc/chat.gif"> New discussion since '.
+                '<img src="'.$location.'/chat.gif"> '.&mt('New discussion since').' '.
                 strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
                 '</td><td align="center" valign="bottom">&nbsp;&nbsp;'.
-                '<img src="/adm/lonMisc/feedback.gif"> New message (click to open)<p>'.
+                '<img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').'<p>'.
                 '</td>'; 
         } else {
             $result .= '<td align="center" valign="bottom">&nbsp;&nbsp;'.
-                '<img src="/adm/lonMisc/chat.gif"> Discussions</td><td align="center" valign="bottom">'.
-                '&nbsp;&nbsp;<img src="/adm/lonMisc/feedback.gif"> New message (click to open)'.
+                '<img src="'.$location.'/chat.gif"> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
+                '&nbsp;&nbsp;<img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').
                 '</td>'; 
         }
 
@@ -1257,18 +1608,81 @@ sub render {
     }
 
     if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
+	my ($link,$text);
         if ($condition) {
-            $result.="<a href=\"navmaps?condition=0&filter=&$queryString" .
-                "&here=" . Apache::lonnet::escape($here) .
-                "\">Close All Folders</a>";
+	    $link='"navmaps?condition=0&filter=&'.$queryString.
+		'&here='.&Apache::lonnet::escape($here).'"';
+	    $text='Close All Folders';
         } else {
-            $result.="<a href=\"navmaps?condition=1&filter=&$queryString" .
-                "&here=" . Apache::lonnet::escape($here) . 
-                "\">Open All Folders</a>";
+	    $link='"navmaps?condition=1&filter=&'.$queryString.
+		'&here='.&Apache::lonnet::escape($here).'"';
+	    $text='Open All Folders';
+        }
+	if ($args->{'caller'} eq 'navmapsdisplay') {
+	    &add_linkitem($args->{'linkitems'},'changefolder',
+			  'location.href='.$link,$text);
+	} else {
+	    $result.='<a href='.$link.'>'.&mt($text).'</a>';
+	}
+        $result .= "\n";
+    }
+
+    # Check for any unread discussions in all resources.
+    if ($args->{'caller'} eq 'navmapsdisplay') {
+	&add_linkitem($args->{'linkitems'},'clearbubbles',
+		      'document.clearbubbles.submit()',
+		      'Mark all posts read');
+	my $time=time;
+	$result .= (<<END);
+    <form name="clearbubbles" method="post" action="/adm/feedback">
+	<input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />
+	<input type="hidden" name="navtime" value="$time" />
+END
+        if ($args->{'sort'} eq 'discussion') { 
+	    my $totdisc = 0;
+	    my $haveDisc = '';
+	    my @allres=$navmap->retrieveResources();
+	    foreach my $resource (@allres) {
+		if ($resource->hasDiscussion()) {
+		    $haveDisc .= $resource->wrap_symb().':';
+		    $totdisc ++;
+		}
+	    }
+	    if ($totdisc > 0) {
+		$haveDisc =~ s/:$//;
+		$result .= (<<END);
+	<input type="hidden" name="navmaps" value="$haveDisc" />
+    </form>
+END
+            }
+	}
+	$result.='</form>';
+    }
+
+    if ($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') {
+	    $result .= '<td>&nbsp;</td>'; 
+        } else {
+	    $result .= '</tr><tr>'; 
         }
-        $result .= "<br /><br />\n";
-    }    
+	$result.=&show_linkitems($args->{'linkitems'});
+        if ($args->{'sort_html'}) {
+	    if ($env{'environment.remotenavmap'} ne 'on') {
+		$result.='<td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td>'.
+		    '<td align="right">'.$args->{'sort_html'}.'</td></tr>';
+	    } else {
+		$result.='</tr><tr><td align="left"><br />'.
+		    $args->{'sort_html'}.'</td></tr>';
+	    }
+	}
+        $result .= '</table>';
+    } elsif ($args->{'sort_html'}) { 
+        $result.=$args->{'sort_html'}; 
+    }
 
+    $result .= "<br />\n";
     if ($r) {
         $r->print($result);
         $r->rflush();
@@ -1290,7 +1704,9 @@ sub render {
     $args->{'indentLevel'} = 0;
     $args->{'isNewBranch'} = 0;
     $args->{'condensed'} = 0;    
-    $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='/adm/lonIcons/whitespace1.gif' width='25' height='1' alt='' border='0' />");
+    my $location=
+	&Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace1.gif");
+    $args->{'indentString'} = setDefault($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,
@@ -1300,7 +1716,7 @@ sub render {
                                                          $it->{FIRST_RESOURCE},
                                                          $it->{FINISH_RESOURCE},
                                                          {}, undef, 1);
-        $depth = 0;
+        my $depth = 0;
         $dfsit->next();
         my $curRes = $dfsit->next();
         while ($depth > -1) {
@@ -1332,9 +1748,6 @@ sub render {
 
     my $displayedJumpMarker = 0;
     # Set up iteration.
-    $depth = 1;
-    $it->next(); # discard initial BEGIN_MAP
-    $curRes = $it->next();
     my $now = time();
     my $in24Hours = $now + 24 * 60 * 60;
     my $rownum = 0;
@@ -1342,9 +1755,60 @@ sub render {
     # export "here" marker information
     $args->{'here'} = $here;
 
-    while ($depth > 0) {
-        if ($curRes == $it->BEGIN_MAP()) { $depth++; }
-        if ($curRes == $it->END_MAP()) { $depth--; }
+    $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
+    my @resources;
+    my $code='';# sub { !(shift->is_map();) };
+    if ($args->{'sort'} eq 'title') {
+        my $oldFilterFunc = $filterFunc;
+	my $filterFunc= 
+	    sub {
+		my ($res)=@_;
+		if ($res->is_map()) { return 0;}
+		return &$oldFilterFunc($res);
+	    };
+	@resources=$navmap->retrieveResources(undef,$filterFunc);
+	@resources= sort { &cmp_title($a,$b) } @resources;
+    } elsif ($args->{'sort'} eq 'duedate') {
+	my $oldFilterFunc = $filterFunc;
+	my $filterFunc= 
+	    sub {
+		my ($res)=@_;
+		if (!$res->is_problem()) { return 0;}
+		return &$oldFilterFunc($res);
+	    };
+	@resources=$navmap->retrieveResources(undef,$filterFunc);
+	@resources= sort {
+	    if ($a->duedate ne $b->duedate) {
+	        return $a->duedate cmp $b->duedate;
+	    }
+	    my $value=&cmp_title($a,$b);
+	    return $value;
+	} @resources;
+    } elsif ($args->{'sort'} eq 'discussion') {
+	my $oldFilterFunc = $filterFunc;
+	my $filterFunc= 
+	    sub {
+		my ($res)=@_;
+		if (!$res->hasDiscussion() &&
+		    !$res->getFeedback() &&
+		    !$res->getErrors()) { return 0;}
+		return &$oldFilterFunc($res);
+	    };
+	@resources=$navmap->retrieveResources(undef,$filterFunc);
+	@resources= sort { &cmp_title($a,$b) } @resources;
+    } else {
+	#unknow sort mechanism or default
+	undef($args->{'sort'});
+    }
+
+
+    while (1) {
+	if ($args->{'sort'}) {
+	    $curRes = shift(@resources);
+	} else {
+	    $curRes = $it->next($closeAllPages);
+	}
+	if (!$curRes) { last; }
 
         # Maintain indentation level.
         if ($curRes == $it->BEGIN_MAP() ||
@@ -1395,10 +1859,6 @@ sub render {
             $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]);
@@ -1448,7 +1908,26 @@ sub render {
             # Add part 0 so we display it correctly.
             unshift @parts, '0';
         }
-
+	
+	{
+	    my ($src,$symb,$anchor,$stack);
+	    if ($args->{'sort'}) {
+		my $it = $navmap->getIterator(undef, undef, undef, 1);
+		while ( my $res=$it->next()) {
+		    if (ref($res) &&
+			$res->symb() eq  $curRes->symb()) { last; }
+		}
+		$stack=$it->getStack();
+	    } else {
+		$stack=$it->getStack();
+	    }
+	    ($src,$symb,$anchor)=getLinkForResource($stack);
+	    if (defined($anchor)) { $anchor='#'.$anchor; }
+	    my $srcHasQuestion = $src =~ /\?/;
+	    $args->{"resourceLink"} = $src.
+		($srcHasQuestion?'&':'?') .
+		'symb=' . &Apache::lonnet::escape($symb).$anchor;
+	}
         # Now, we've decided what parts to show. Loop through them and
         # show them.
         foreach my $part (@parts) {
@@ -1459,14 +1938,7 @@ sub render {
 
             # Set up some data about the parts that the cols might want
             my $filter = $it->{FILTER};
-            my $stack = $it->getStack();
-            my $src = getLinkForResource($stack);
-            
-            my $srcHasQuestion = $src =~ /\?/;
-            $args->{"resourceLink"} = $src.
-                ($srcHasQuestion?'&':'?') .
-                'symb=' . &Apache::lonnet::escape($curRes->symb());
-            
+
             # Now, display each column.
             foreach my $col (@$cols) {
                 my $colHTML = '';
@@ -1498,7 +1970,14 @@ sub render {
             $r->rflush();
         }
     } continue {
-        $curRes = $it->next();
+	if ($r) {
+	    # If we have the connection, make sure the user is still connected
+	    my $c = $r->connection;
+	    if ($c->aborted()) {
+		# Who cares what we do, nobody will see it anyhow.
+		return '';
+	    }
+	}
     }
     
     # Print out the part that jumps to #curloc if it exists
@@ -1509,7 +1988,12 @@ sub render {
     # it's quite likely this might fix other browsers, too, and 
     # certainly won't hurt anything.
     if ($displayedJumpMarker) {
-        $result .= "<script>setTimeout(\"location += '#curloc';\", 0)</script>\n";
+        $result .= "
+<script>
+if (location.href.indexOf('#curloc')==-1) {
+    setTimeout(\"location += '#curloc';\", 0)
+}
+</script>";
     }
 
     $result .= "</table>";
@@ -1520,8 +2004,46 @@ sub render {
         $r->rflush();
     }
         
-    if ($mustCloseNavMap) { $navmap->untieHashes(); } 
+    return $result;
+}
 
+sub add_linkitem {
+    my ($linkitems,$name,$cmd,$text)=@_;
+    $$linkitems{$name}{'cmd'}=$cmd;
+    $$linkitems{$name}{'text'}=&mt($text);
+}
+
+sub show_linkitems {
+    my ($linkitems)=@_;
+    my @linkorder = ("blank","launchnav","closenav","firsthomework",
+		     "everything","uncompleted","changefolder","clearbubbles");
+    
+    my $result .= (<<ENDBLOCK);
+              <td align="left">
+<script type="text/javascript">
+    function changeNavDisplay () {
+	var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
+ENDBLOCK
+    foreach my $link (@linkorder) {
+	$result.= "if (navchoice == '$link') {".
+	    $linkitems->{$link}{'cmd'}."}\n";
+    }
+    $result.='}
+              </script>
+                   <form name="linkitems" method="post">
+                       <nobr><select name="toplink">'."\n";
+    foreach my $link (@linkorder) {
+	if (defined($linkitems->{$link})) {
+	    if ($linkitems->{$link}{'text'} ne '') {
+		$result .= ' <option value="'.$link.'">'.
+		    $linkitems->{$link}{'text'}."</option>\n";
+	    }
+	}
+    }
+    $result .= '</select>&nbsp;<input type="button" name="chgnav"
+                   value="Go" onClick="javascript:changeNavDisplay()" />
+                </nobr></form></td>'."\n";
+	
     return $result;
 }
 
@@ -1531,41 +2053,61 @@ package Apache::lonnavmaps::navmap;
 
 =pod
 
-lonnavmaps provides functions and objects for dealing with the
-compiled course hashes generated when a user enters the course, the
-Apache handler for the "Navigation Map" button, and a flexible
-prepared renderer for navigation maps that are easy to use anywhere.
+=head1 Object: Apache::lonnavmaps::navmap
 
-=head1 Object: navmap
+=head2 Overview
 
-Encapsulating the compiled nav map
+The navmap object's job is to provide access to the resources
+in the course as Apache::lonnavmaps::resource objects, and to
+query and manage the relationship between those resource objects.
 
-navmap is an object that encapsulates a compiled course map and
-provides a reasonable interface to it.
+Generally, you'll use the navmap object in one of three basic ways.
+In order of increasing complexity and power:
 
-Most notably it provides a way to navigate the map sensibly and a
-flexible iterator that makes it easy to write various renderers based
-on nav maps.
+=over 4
 
-You must obtain resource objects through the navmap object.
+=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 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 (see the B<getResourceByUrl>
+    documentation for more details.)
+
+=item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
+    retrieves resources matching some criterion and returns them
+    in a flat array, with no structure information. Use this when
+    you are manipulating a series of resources, based on what map
+    the are in, but do not care about branching, or exactly how
+    the maps and resources are related. This is the most common case.
+
+=item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
+    the course's navmap in various ways without writing the traversal
+    code yourself. See iterator documentation below. Use this when
+    you need to know absolutely everything about the course, including
+    branches and the precise relationship between maps and resources.
 
-=head2 Methods
+=back
+
+=head2 Creation And Destruction
+
+To create a navmap object, use the following function:
 
 =over 4
 
-=item * B<new>(navHashFile, parmHashFile, genCourseAndUserOptions,
-  genMailDiscussStatus):
+=item * B<Apache::lonnavmaps::navmap-E<gt>new>():
+
+Creates a new navmap object. Returns the navmap object if this is
+successful, or B<undef> if not.
+
+=back
 
-Binds a new navmap object to the compiled nav map hash and parm hash
-given as filenames. genCourseAndUserOptions is a flag saying whether
-the course options and user options hash should be generated. This is
-for when you are using the parameters of the resources that require
-them; see documentation in resource object
-documentation. genMailDiscussStatus causes the nav map to retreive
-information about the email and discussion status of
-resources. Returns the navmap object if this is successful, or
-B<undef> if not. You must check for undef; errors will occur when you
-try to use the other methods otherwise.
+=head2 Methods
+
+=over 4
 
 =item * B<getIterator>(first, finish, filter, condition):
 
@@ -1575,6 +2117,7 @@ See iterator documentation below.
 
 use strict;
 use GDBM_File;
+use Apache::lonnet;
 
 sub new {
     # magic invocation to create a class instance
@@ -1582,11 +2125,6 @@ sub new {
     my $class = ref($proto) || $proto;
     my $self = {};
 
-    $self->{NAV_HASH_FILE} = shift;
-    $self->{PARM_HASH_FILE} = shift;
-    $self->{GENERATE_COURSE_USER_OPT} = shift;
-    $self->{GENERATE_EMAIL_DISCUSS_STATUS} = shift;
-
     # Resource cache stores navmap resources as we reference them. We generate
     # them on-demand so we don't pay for creating resources unless we use them.
     $self->{RESOURCE_CACHE} = {};
@@ -1599,12 +2137,13 @@ sub new {
 
     my %navmaphash;
     my %parmhash;
-    if (!(tie(%navmaphash, 'GDBM_File', $self->{NAV_HASH_FILE},
+    my $courseFn = $env{"request.course.fn"};
+    if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
               &GDBM_READER(), 0640))) {
         return undef;
     }
     
-    if (!(tie(%parmhash, 'GDBM_File', $self->{PARM_HASH_FILE},
+    if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
               &GDBM_READER(), 0640)))
     {
         untie %{$self->{PARM_HASH}};
@@ -1613,122 +2152,142 @@ sub new {
 
     $self->{NAV_HASH} = \%navmaphash;
     $self->{PARM_HASH} = \%parmhash;
-    $self->{INITED} = 0;
+    $self->{PARM_CACHE} = {};
 
     bless($self);
         
     return $self;
 }
 
-sub init {
+sub generate_course_user_opt {
     my $self = shift;
-    if ($self->{INITED}) { return; }
+    if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
 
-    # If the course opt hash and the user opt hash should be generated,
-    # generate them
-    if ($self->{GENERATE_COURSE_USER_OPT}) {
-        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 $userprefix=$uname.'_'.$udom.'_';
-        
-        my %courserdatas; my %useropt; my %courseopt; my %userrdatas;
-        unless ($uhome eq 'no_host') { 
+    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.'.$cid.'.num'};
+    
 # ------------------------------------------------- Get coursedata (if present)
-            unless ((time-$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);
-            }
-            $self->{COURSE_OPT} = \%courseopt;
-            $self->{USER_OPT} = \%useropt;
-        }
-    }   
+	
+    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) {
+	    $self->{NETWORK_FAILURE} = 1;
+	}
+	undef($useropt);
+    }
 
-    if ($self->{GENERATE_EMAIL_DISCUSS_STATUS}) {
-        my $cid=$ENV{'request.course.id'};
-        my ($cdom,$cnum)=split(/\_/,$cid);
-        
-        my %emailstatus = &Apache::lonnet::dump('email_status');
-        my $logoutTime = $emailstatus{'logout'};
-        my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
-        $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
-                               $courseLeaveTime : $logoutTime);
-        my %discussiontime = &Apache::lonnet::dump('discussiontimes', 
-                                                   $cdom, $cnum);
-        my %feedback=();
-        my %error=();
-        my $keys = &Apache::lonnet::reply('keys:'.
-                                          $ENV{'user.domain'}.':'.
-                                          $ENV{'user.name'}.':nohist_email',
-                                          $ENV{'user.home'});
-
-        foreach my $msgid (split(/\&/, $keys)) {
-            $msgid=&Apache::lonnet::unescape($msgid);
-            my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
-            if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
-                my ($what,$url)=($1,$2);
-                my %status=
-                    &Apache::lonnet::get('email_status',[$msgid]);
-                if ($status{$msgid}=~/^error\:/) { 
-                    $status{$msgid}=''; 
-                }
-                
-                if (($status{$msgid} eq 'new') || 
-                    (!$status{$msgid})) { 
-                    if ($what eq 'Error') {
-                        $error{$url}.=','.$msgid; 
-                    } else {
-                        $feedback{$url}.=','.$msgid;
-                    }
-                }
-            }
-        }
-        
-        $self->{FEEDBACK} = \%feedback;
-        $self->{ERROR_MSG} = \%error; # what is this? JB
-        $self->{DISCUSSION_TIME} = \%discussiontime;
-        $self->{EMAIL_STATUS} = \%emailstatus;
-        
-    }    
+    $self->{COURSE_OPT} = $courseopt;
+    $self->{USER_OPT} = $useropt;
 
-    $self->{PARM_CACHE} = {};
-    $self->{INITED} = 1;
+    $self->{COURSE_USER_OPT_GENERATED} = 1;
+    
+    return;
+}
+
+sub generate_email_discuss_status {
+    my $self = shift;
+    my $symb = shift;
+    if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
+
+    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'}};
+    $self->{LAST_CHECK} = (($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');
+    my %lastreadtime = ();
+    foreach (keys %lastread) {
+        my $key = $_;
+        $key =~ s/_lastread$//;
+        $lastreadtime{$key} = $lastread{$_};
+    }
+
+    my %feedback=();
+    my %error=();
+    my @keys = &Apache::lonnet::getkeys('nohist_email',$env{'user.domain'},
+					$env{'user.name'});
+    
+    foreach my $msgid (@keys) {
+	if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
+	    my $plain=
+		&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
+	    if ($plain=~/ \[([^\]]+)\]\:/) {
+		my $url=$1;
+		if ($plain=~/\:Error \[/) {
+		    $error{$url}.=','.$msgid; 
+		} else {
+		    $feedback{$url}.=','.$msgid;
+		}
+	    }
+	}
+    }
+    
+    #url's of resources that have feedbacks
+    $self->{FEEDBACK} = \%feedback;
+    #or errors
+    $self->{ERROR_MSG} = \%error;
+    $self->{DISCUSSION_TIME} = \%discussiontime;
+    $self->{EMAIL_STATUS} = \%emailstatus;
+    $self->{LAST_READ} = \%lastreadtime;
+    
+    $self->{EMAIL_DISCUSS_GENERATED} = 1;
 }
 
+sub get_user_data {
+    my $self = shift;
+    if ($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'});
+    $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 {
@@ -1736,10 +2295,19 @@ sub navhash {
     return $self->{NAV_HASH}->{$key};
 }
 
+=pod
+
+=item * B<courseMapDefined>(): Returns true if the course map is defined, 
+    false otherwise. Undefined course maps indicate an error somewhere in
+    LON-CAPA, and you will not be able to proceed with using the navmap.
+    See the B<NAV> screen for an example of using this.
+
+=cut
+
 # 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");
@@ -1749,36 +2317,119 @@ 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;
 }
 
-# unties the hash when done
-sub untieHashes {
-    my $self = shift;
-    untie %{$self->{NAV_HASH}};
-    untie %{$self->{PARM_HASH}};
-}
-
 # Private method: Does the given resource (as a symb string) have
 # current discussion? Returns 0 if chat/mail data not extracted.
 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});
-    return $self->{DISCUSSION_TIME}->{$symb} >
-           $self->{LAST_CHECK};
+
+    # 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 {
+#        return $self->{DISCUSSION_TIME}->{$ressymb} >  $self->{LAST_CHECK}; # v.1.1 behavior 
+        return $self->{DISCUSSION_TIME}->{$ressymb} >  0; # in 1.2 will display speech bubble icons for all items with posts until marked as read (even if read in v 1.1).
+    }
+}
+
+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);
+    # keys used to store bulletinboard postings use 'unwrapped' symb. 
+    my $discsymb = $self->unwrap_symb($ressymb);
+    my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
+    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}{$id.':keys:'.$discsymb};
+	my @keys=split(/:/,$vkeys);
+	if (grep(/^hidden$/ ,@keys)) {
+	    if (!$hiddenflag) {
+		$hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
+		$hiddenflag = 1;
+	    }
+	} elsif (grep(/^deleted$/,@keys)) {
+	    if (!$deletedflag) {
+		$deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
+		$deletedflag = 1;
+	    }
+	} else {
+	    if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)
+		&& $prevread < $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
+		    $unreadcount++;
+		    $subjects{$unreadcount}=
+			$id.': '.$self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
+		}
+	}
+    }
+    if (wantarray) {
+	return ($unreadcount,\%subjects);
+    }
+    return $unreadcount
+}
+
+sub wrap_symb {
+    my $self = shift;
+    my $symb = shift;
+    if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
+        unless ($symb =~ m|adm/wrapper/adm|) {
+            $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
+        }
+    }
+    return $symb;
+}
+
+sub unwrap_symb {
+    my $self = shift;
+    my $ressymb = shift;
+    my $discsymb = $ressymb;
+    if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
+         $discsymb = $1.$2;
+    }
+    return $discsymb;
 }
 
 # 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;
 
+    $self->generate_email_discuss_status();
+
     if (!defined($self->{FEEDBACK})) { return ""; }
     
     return $self->{FEEDBACK}->{$symb};
@@ -1788,7 +2439,9 @@ sub getFeedback {
 sub getErrors { 
     my $self = shift;
     my $src = shift;
-    
+
+    $self->generate_email_discuss_status();
+
     if (!defined($self->{ERROR_MSG})) { return ""; }
     return $self->{ERROR_MSG}->{$src};
 }
@@ -1817,7 +2470,6 @@ the given map. This is one of the proper
 # The strategy here is to cache the resource objects, and only construct them
 # as we use them. The real point is to prevent reading any more from the tied
 # hash then we have to, which should hopefully alleviate speed problems.
-# Caching is just an incidental detail I throw in because it makes sense.
 
 sub getById {
     my $self = shift;
@@ -1837,9 +2489,14 @@ sub getById {
 sub getBySymb {
     my $self = shift;
     my $symb = shift;
-    my ($mapUrl, $id, $filename) = split (/___/, $symb);
+
+    my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
     my $map = $self->getResourceByUrl($mapUrl);
-    return $self->getById($map->map_pc() . '.' . $id);
+    my $returnvalue = undef;
+    if (ref($map)) {
+        $returnvalue = $self->getById($map->map_pc() .'.'.$id);
+    }
+    return $returnvalue;
 }
 
 sub getByMapPc {
@@ -1862,7 +2519,7 @@ 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);
 }
 
@@ -1878,7 +2535,7 @@ 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);
 }
 
@@ -1900,17 +2557,26 @@ sub parmval {
 
 sub parmval_real {
     my $self = shift;
-    my ($what,$symb) = @_;
+    my ($what,$symb,$recurse) = @_;
+
+    # 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='';
 
-    my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);
+    my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
 
 # ----------------------------------------------------- Cascading lookup scheme
     my $rwhat=$what;
@@ -1919,7 +2585,11 @@ 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;
@@ -1941,6 +2611,12 @@ 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}; }
@@ -1949,8 +2625,6 @@ 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
@@ -1960,10 +2634,20 @@ sub parmval_real {
 
 # ----------------------------------------------------- fourth , check default
 
-    my $default=&Apache::lonnet::metadata($fn,$rwhat.'.default');
+    my $meta_rwhat=$rwhat;
+    $meta_rwhat=~s/\./_/g;
+    my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
+    if (defined($default)) { return $default}
+    $default=&Apache::lonnet::metadata($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);
@@ -1972,24 +2656,30 @@ sub parmval_real {
 	my $id=pop(@parts);
 	my $part=join('_',@parts);
 	if ($part eq '') { $part='0'; }
-	my $partgeneral=$self->parmval($part.".$qualifier",$symb);
+	my $partgeneral=$self->parmval($part.".$qualifier",$symb,1);
 	if (defined($partgeneral)) { return $partgeneral; }
     }
+    if ($recurse) { return undef; }
+    my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$what);
+    if (defined($pack_def)) { return $pack_def; }
     return '';
 }
 
 =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
@@ -1997,13 +2687,14 @@ 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
@@ -2012,30 +2703,50 @@ want to know is if I<any> resources matc
 parameter will allow you to avoid potentially expensive enumeration of
 all matching resources.
 
-=item * B<hasResources>(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 {
@@ -2049,37 +2760,33 @@ 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);
     }
 
+    # If nothing was passed, assume top-level map
+    if (!$map) {
+	$map = $self->getById('0.0');
+    }
+
     # Check the map's validity.
-    if (!$map || !$map->is_map()) {
+    if (!$map->is_map()) {
         # Oh, to throw an exception.... how I'd love that!
         return ();
     }
 
     # Get an iterator.
     my $it = $self->getIterator($map->map_start(), $map->map_finish(),
-                                !$recursive);
+                                undef, $recursive, $showall);
 
     my @resources = ();
 
     # Run down the iterator and collect the resources.
-    my $depth = 1;
-    $it->next();
-    my $curRes = $it->next();
-
-    while ($depth > 0) {
-        if ($curRes == $it->BEGIN_MAP()) {
-            $depth++;
-        }
-        if ($curRes == $it->END_MAP()) {
-            $depth--;
-        }
-        
+    my $curRes;
+
+    while ($curRes = $it->next()) {
         if (ref($curRes)) {
             if (!&$filterFunc($curRes)) {
                 next;
@@ -2092,7 +2799,6 @@ sub retrieveResources {
             }
         }
 
-        $curRes = $it->next();
     }
 
     return @resources;
@@ -2103,13 +2809,22 @@ 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 Scalar::Util qw(weaken);
+use Apache::lonnet;
 
 =pod
 
@@ -2168,21 +2883,28 @@ new branch. The possible tokens are:
 
 =over 4
 
-=item * BEGIN_MAP:
+=item * B<END_ITERATOR>:
+
+The iterator has returned all that it's going to. Further calls to the
+iterator will just produce more of these. This is a "false" value, and
+is the only false value the iterator which will be returned, so it can
+be used as a loop sentinel.
+
+=item * B<BEGIN_MAP>:
 
 A new map is being recursed into. This is returned I<after> the map
 resource itself is returned.
 
-=item * END_MAP:
+=item * B<END_MAP>:
 
 The map is now done.
 
-=item * BEGIN_BRANCH:
+=item * B<BEGIN_BRANCH>:
 
 A branch is now starting. The next resource returned will be the first
 in that branch.
 
-=item * END_BRANCH:
+=item * B<END_BRANCH>:
 
 The branch is now done.
 
@@ -2200,10 +2922,31 @@ but only one resource will be returned.
 
 =back
 
+=head2 Normal Usage
+
+Normal usage of the iterator object is to do the following:
+
+ my $it = $navmap->getIterator([your params here]);
+ my $curRes;
+ while ($curRes = $it->next()) {
+   [your logic here]
+ }
+
+Note that inside of the loop, it's frequently useful to check if
+"$curRes" is a reference or not with the reference function; only
+resource objects will be references, and any non-references will 
+be the tokens described above.
+
+Also note there is some old code floating around that trys to track
+the depth of the iterator to see when it's done; do not copy that 
+code. It is difficult to get right and harder to understand then
+this. They should be migrated to this new style.
+
 =cut
 
 # Here are the tokens for the iterator:
 
+sub END_ITERATOR { return 0; }
 sub BEGIN_MAP { return 1; }    # begining of a new map
 sub END_MAP { return 2; }      # end of the map
 sub BEGIN_BRANCH { return 3; } # beginning of a branch
@@ -2216,18 +2959,13 @@ sub min {
     if ($a < $b) { return $a; } else { return $b; }
 }
 
-# In the CVS repository, documentation of this algorithm is included 
-# in /doc/lonnavdocs, as a PDF and .tex source. Markers like **1**
-# will reference the same location in the text as the part of the
-# algorithm is running through.
-
 sub new {
     # magic invocation to create a class instance
     my $proto = shift;
     my $class = ref($proto) || $proto;
     my $self = {};
 
-    $self->{NAV_MAP} = shift;
+    weaken($self->{NAV_MAP} = shift);
     return undef unless ($self->{NAV_MAP});
 
     # Handle the parameters
@@ -2276,6 +3014,9 @@ sub new {
     # that isn't just a redirector.
     my $resource; my $resourceCount = 0;
 
+    # Documentation on this algorithm can be found in the CVS repository at 
+    # /docs/lonnavdocs; these "**#**" markers correspond to documentation
+    # in that file.
     # **1**
 
     foreach my $pass (@iterations) {
@@ -2291,13 +3032,13 @@ sub new {
     
         # prime the recursion
         $self->{$firstResourceName}->{DATA}->{$valName} = 0;
-        my $depth = 0;
-        $iterator->next();
+	$iterator->next();
         my $curRes = $iterator->next();
-        while ($depth > -1) {
-            if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
-            if ($curRes == $iterator->END_MAP()) { $depth--; }
-        
+	my $depth = 1;
+        while ($depth > 0) {
+	    if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
+	    if ($curRes == $iterator->END_MAP()) { $depth--; }
+
             if (ref($curRes)) {
                 # If there's only one resource, this will save it
                 # we have to filter empty resources from consideration here,
@@ -2331,20 +3072,21 @@ sub new {
                 $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
                 if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
             }
-        } continue {
-            $curRes = $iterator->next();
+
+	    $curRes = $iterator->next();
         }
     }
 
     # Check: Was this only one resource, a map?
-    if ($resourceCount == 1 && $resource->is_map() && !$self->{FORCE_TOP}) { 
+    if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) { 
         my $firstResource = $resource->map_start();
         my $finishResource = $resource->map_finish();
         return 
             Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
                                               $finishResource, $self->{FILTER},
                                               $self->{ALREADY_SEEN}, 
-                                              $self->{CONDITION}, 0);
+                                              $self->{CONDITION},
+					      $self->{FORCE_TOP});
         
     }
 
@@ -2353,6 +3095,7 @@ sub new {
     $self->{MAX_DEPTH} = $maxDepth;
     $self->{STACK} = [];
     $self->{RECURSIVE_ITERATOR_FLAG} = 0;
+    $self->{FINISHED} = 0; # When true, the iterator has finished
 
     for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
         push @{$self->{STACK}}, [];
@@ -2369,6 +3112,10 @@ sub new {
 
 sub next {
     my $self = shift;
+    my $closeAllPages=shift;
+    if ($self->{FINISHED}) {
+	return END_ITERATOR();
+    }
 
     # If we want to return the top-level map object, and haven't yet,
     # do so.
@@ -2379,7 +3126,7 @@ sub next {
 
     if ($self->{RECURSIVE_ITERATOR_FLAG}) {
         # grab the next from the recursive iterator 
-        my $next = $self->{RECURSIVE_ITERATOR}->next();
+        my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
 
         # is it a begin or end map? If so, update the depth
         if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
@@ -2429,6 +3176,7 @@ sub next {
             $self->{CURRENT_DEPTH}--;
             return END_BRANCH();
         } else {
+	    $self->{FINISHED} = 1;
             return END_MAP();
         }
     }
@@ -2492,7 +3240,7 @@ sub next {
 
     # That ends the main iterator logic. Now, do we want to recurse
     # down this map (if this resource is a map)?
-    if ($self->{HERE}->is_map() &&
+    if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
         (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
         $self->{RECURSIVE_ITERATOR_FLAG} = 1;
         my $firstResource = $self->{HERE}->map_start();
@@ -2501,7 +3249,9 @@ 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.
@@ -2510,7 +3260,7 @@ sub next {
     my $browsePriv = $self->{HERE}->browsePriv();
     if (!$self->{HERE}->src() || 
         (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
-        return $self->next();
+        return $self->next($closeAllPages);
     }
 
     return $self->{HERE};
@@ -2554,6 +3304,8 @@ sub populateStack {
 1;
 
 package Apache::lonnavmaps::DFSiterator;
+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
@@ -2562,7 +3314,7 @@ package Apache::lonnavmaps::DFSiterator;
 #  useful for pre-processing of some kind, and is in fact used by the main
 #  iterator that way, but that's about it.
 # One could imagine merging this into the init routine of the main iterator,
-#  but this might as well be left seperate, since it is possible some other
+#  but this might as well be left separate, since it is possible some other
 #  use might be found for it. - Jeremy
 
 # Unlike the main iterator, this DOES return all resources, even blank ones.
@@ -2582,7 +3334,7 @@ sub new {
     my $class = ref($proto) || $proto;
     my $self = {};
 
-    $self->{NAV_MAP} = shift;
+    weaken($self->{NAV_MAP} = shift);
     return undef unless ($self->{NAV_MAP});
 
     $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
@@ -2736,13 +3488,14 @@ sub populateStack {
 1;
 
 package Apache::lonnavmaps::resource;
-
+use Scalar::Util qw(weaken);
 use Apache::lonnet;
 
 =pod
 
-=head1 Object: resource
+=head1 Object: resource 
 
+X<resource, navmap object>
 A resource object encapsulates a resource in a resource map, allowing
 easy manipulation of the resource, querying the properties of the
 resource (including user properties), and represents a reference that
@@ -2762,24 +3515,52 @@ writing, there is no way to override thi
 parts will never be returned, nor will their response types or ids be
 stored.
 
-=head2 Public Members
+=head2 Overview
 
-resource objects have a hash called DATA ($resourceRef->{DATA}) that
-you can store whatever you want in. This allows you to easily do
-two-pass algorithms without worrying about managing your own
-resource->data hash.
-
-=head2 Methods
-
-=over 4
-
-=item * B<new>($navmapRef, $idString):
-
-The first arg is a reference to the parent navmap object. The second
-is the idString of the resource itself. Very rarely, if ever, called
-directly. Use the nav map->getByID() method.
-
-=back
+A B<Resource> is the most granular type of object in LON-CAPA that can
+be included in a course. It can either be a particular resource, like
+an HTML page, external resource, problem, etc., or it can be a
+container sequence, such as a "page" or a "map".
+
+To see a sequence from the user's point of view, please see the
+B<Creating a Course: Maps and Sequences> chapter of the Author's
+Manual.
+
+A Resource Object, once obtained from a navmap object via a B<getBy*>
+method of the navmap, or from an iterator, allows you to query
+information about that resource.
+
+Generally, you do not ever want to create a resource object yourself,
+so creation has been left undocumented. Always retrieve resources
+from navmap objects.
+
+=head3 Identifying Resources
+
+X<big hash>Every resource is identified by a Resource ID in the big hash that is
+unique to that resource for a given course. X<resource ID, in big hash>
+The Resource ID has the form #.#, where the first number is the same
+for every resource in a map, and the second is unique. For instance,
+for a course laid out like this:
+
+ * Problem 1
+ * Map
+   * Resource 2
+   * Resource 3
+
+C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
+C<Resource 3> will share a first number. The second number may end up
+re-used between the two groups.
+
+The resource ID is only used in the big hash, but can be used in the
+context of a course to identify a resource easily. (For instance, the
+printing system uses it to record which resources from a sequence you 
+wish to print.)
+
+X<symb> X<resource, symb>
+All resources also have B<symb>s, which uniquely identify a resource
+in a course. Many internal LON-CAPA functions expect a symb. A symb
+carries along with it the URL of the resource, and the map it appears
+in. Symbs are much larger then resource IDs.
 
 =cut
 
@@ -2789,7 +3570,7 @@ sub new {
     my $class = ref($proto) || $proto;
     my $self = {};
 
-    $self->{NAV_MAP} = shift;
+    weaken($self->{NAV_MAP} = shift);
     $self->{ID} = shift;
 
     # Store this new resource in the parent nav map's cache.
@@ -2818,14 +3599,21 @@ sub navHash {
 
 =pod
 
-B<Metadata Retreival>
+=head2 Methods
 
-These are methods that help you retrieve metadata about the resource:
-Method names are based on the fields in the compiled course
-representation.
+Once you have a resource object, here's what you can do with it:
+
+=head3 Attribute Retrieval
+
+Every resource has certain attributes that can be retrieved and used:
 
 =over 4
 
+=item * B<ID>: Every resource has an ID that is unique for that
+    resource in the course it is in. The ID is actually in the hash
+    representing the resource, so for a resource object $res, obtain
+    it via C<$res->{ID}).
+
 =item * B<compTitle>:
 
 Returns a "composite title", that is equal to $res->title() if the
@@ -2836,11 +3624,6 @@ resource has a title, and is otherwise t
 
 Returns true if the resource is external.
 
-=item * B<goesto>:
-
-Returns the "goesto" value from the compiled nav map. (It is likely
-you want to use B<getNext> instead.)
-
 =item * B<kind>:
 
 Returns the kind of the resource from the compiled nav map.
@@ -2868,11 +3651,6 @@ Returns the symb for the resource.
 
 Returns the title of the resource.
 
-=item * B<to>:
-
-Returns the "to" value from the compiled nav map. (It is likely you
-want to use B<getNext> instead.)
-
 =back
 
 =cut
@@ -2880,30 +3658,83 @@ want to use B<getNext> instead.)
 # 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 encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
 sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
 sub from { my $self=shift; return $self->navHash("from_", 1); }
+# considered private and undocumented
 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); }
 sub randompick { 
     my $self = shift;
-    return $self->{NAV_MAP}->{PARM_HASH}->{$self->symb .
-                                               '.0.parameter_randompick'};
+    return $self->parmval('randompick');
+}
+sub link {
+    my $self=shift;
+    if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
+    return $self->src;
 }
 sub src { 
     my $self=shift;
     return $self->navHash("src_", 1);
 }
+sub shown_symb {
+    my $self=shift;
+    if ($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+)/;
     my $symbSrc = &Apache::lonnet::declutter($self->src());
-    return &Apache::lonnet::declutter(
-         $self->navHash('map_id_'.$first)) 
+    my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first)) 
         . '___' . $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; return $self->navHash("title_", 1); }
+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 $self->navHash("title_", 1); }
+# considered private and undocumented
 sub to { my $self=shift; return $self->navHash("to_", 1); }
+sub condition {
+    my $self=shift;
+    my $undercond=$self->navHash("undercond_", 1);
+    if (!defined($undercond)) { return 1; };
+    my $condid=$self->navHash("condid_$undercond");
+    if (!defined($condid)) { return 1; };
+    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();
@@ -2944,7 +3775,26 @@ Returns true if the resource is a sequen
 
 =cut
 
+sub hasResource {
+   my $self = shift;
+   return $self->{NAV_MAP}->hasResource(@_);
+}
+
+sub retrieveResources {
+   my $self = shift;
+   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();
@@ -2957,10 +3807,29 @@ 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$/);
+    if ($src =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/) {
+	return !($self->is_practice());
+    }
+    return 0;
+}
+sub contains_problem {
+    my $self=shift;
+    if ($self->is_page()) {
+	my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
+	return $hasProblem;
+    }
+    return 0;
 }
 sub is_sequence {
     my $self=shift;
@@ -2968,6 +3837,28 @@ sub is_sequence {
     return $self->navHash("is_map_", 1) && 
 	$self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
 }
+sub is_survey {
+    my $self = shift();
+    my $part = shift();
+    if ($self->parmval('type',$part) eq 'survey') {
+        return 1;
+    }
+    if ($self->src() =~ /\.(survey)$/) {
+        return 1;
+    }
+    return 0;
+}
+sub is_task {
+    my $self=shift;
+    my $src = $self->src();
+    return ($src =~ /\.(task)$/)
+}
+
+sub is_empty_sequence {
+    my $self=shift;
+    my $src = $self->src();
+    return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
+}
 
 # Private method: Shells out to the parmval in the nav map, handler parts.
 sub parmval {
@@ -3078,6 +3969,11 @@ Get the Client IP/Name Access Control in
 
 Get the answer-reveal date for the problem.
 
+=item * B<awarded>: 
+
+Gets the awarded value for the problem part. Requires genUserData set to
+true when the navmap object was created.
+
 =item * B<duedate>:
 
 Get the due date for the problem.
@@ -3131,11 +4027,25 @@ sub answerdate {
     }
     return $self->parmval("answerdate", $part);
 }
-sub awarded { my $self = shift; return $self->queryRestoreHash('awarded', shift); }
+sub awarded { 
+    my $self = shift; my $part = shift;
+    $self->{NAV_MAP}->get_user_data();
+    if (!defined($part)) { $part = '0'; }
+    return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
+}
 sub duedate {
     (my $self, my $part) = @_;
+    my $interval=$self->parmval("interval", $part);
+    if ($interval) {
+	my $first_access=&Apache::lonnet::get_first_access('map',$self->symb);
+	if ($first_access) { return ($first_access+$interval); }
+    }
     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);
@@ -3150,7 +4060,7 @@ sub opendate {
 }
 sub problemstatus {
     (my $self, my $part) = @_;
-    return $self->parmval("problemstatus", $part);
+    return lc $self->parmval("problemstatus", $part);
 }
 sub sig {
     (my $self, my $part) = @_;
@@ -3172,7 +4082,21 @@ sub type {
 }
 sub weight { 
     my $self = shift; my $part = shift;
-    return $self->parmval("weight", $part);
+    if (!defined($part)) { $part = '0'; }
+    return &Apache::lonnet::EXT('resource.'.$part.'.weight',
+				$self->symb(), $env{'user.domain'},
+				$env{'user.name'}, 
+				$env{'request.course.sec'});
+}
+sub part_display {
+    my $self= shift(); my $partID = shift();
+    if (! defined($partID)) { $partID = '0'; }
+    my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
+                                     $self->symb);
+    if (! defined($display) || $display eq '') {
+        $display = $partID;
+    }
+    return $display;
 }
 
 # Multiple things need this
@@ -3213,6 +4137,19 @@ 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
@@ -3233,6 +4170,16 @@ 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();
@@ -3262,6 +4209,16 @@ Returns the number of parts of the probl
 for single part problems, returns 1. For multipart, it returns the
 number of parts in the problem, not including psuedo-part 0. 
 
+=item * B<countResponses>():
+
+Returns the total number of responses in the problem a student can answer.
+
+=item * B<responseTypes>():
+
+Returns a hash whose keys are the response types.  The values are the number 
+of times each response type is used.  This is for the I<entire> problem, not 
+just a single part.
+
 =item * B<multipart>():
 
 Returns true if the problem is multipart, false otherwise. Use this instead
@@ -3308,17 +4265,46 @@ sub countParts {
     return scalar(@{$parts}); # + $delta;
 }
 
+sub countResponses {
+    my $self = shift;
+    my $count;
+    foreach my $part (@{$self->parts()}) {
+        $count+= scalar($self->responseIds($part));
+    }
+    return $count;
+}
+
+sub responseTypes {
+    my $self = shift;
+    my %responses;
+    foreach my $part (@{$self->parts()}) {
+        foreach my $responsetype ($self->responseType($part)) {
+            $responses{$responsetype}++ if (defined($responsetype));
+        }
+    }
+    return %responses;
+}
+
 sub multipart {
     my $self = shift;
     return $self->countParts() > 1;
 }
 
+sub singlepart {
+    my $self = shift;
+    return $self->countParts() == 1;
+}
+
 sub responseType {
     my $self = shift;
     my $part = shift;
 
     $self->extractParts();
-    return $self->{RESPONSE_TYPE}->{$part};
+    if (defined($self->{RESPONSE_TYPES}->{$part})) {
+	return @{$self->{RESPONSE_TYPES}->{$part}};
+    } else {
+	return undef;
+    }
 }
 
 sub responseIds {
@@ -3326,7 +4312,11 @@ sub responseIds {
     my $part = shift;
 
     $self->extractParts();
-    return $self->{RESPONSE_IDS}->{$part};
+    if (defined($self->{RESPONSE_IDS}->{$part})) {
+	return @{$self->{RESPONSE_IDS}->{$part}};
+    } else {
+	return undef;
+    }
 }
 
 # Private function: Extracts the parts information, both part names and
@@ -3343,33 +4333,46 @@ sub extractParts {
 
     # Retrieve part count, if this is a problem
     if ($self->is_problem()) {
+	my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
         my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
-        if (!$metadata) {
-            $self->{RESOURCE_ERROR} = 1;
-            $self->{PARTS} = [];
-            $self->{PART_TYPE} = {};
-            return;
-        }
-        foreach (split(/\,/,$metadata)) {
-            if ($_ =~ /^part_(.*)$/) {
-                my $part = $1;
-                # This floods the logs if it blows up
-                if (defined($parts{$part})) {
-                    Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
-                  }
-
-                # check to see if part is turned off.
 
-                if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
-                    $parts{$part} = 1;
-                }
-            }
+	if ($partorder) {
+	    my @parts;
+	    for my $part (split (/,/,$partorder)) {
+		if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
+		    push @parts, $part;
+		    $parts{$part} = 1;
+		}
+	    }
+	    $self->{PARTS} = \@parts;
+	} else {
+	    if (!$metadata) {
+		$self->{RESOURCE_ERROR} = 1;
+		$self->{PARTS} = [];
+		$self->{PART_TYPE} = {};
+		return;
+	    }
+	    foreach (split(/\,/,$metadata)) {
+		if ($_ =~ /^(?:part|Task)_(.*)$/) {
+		    my $part = $1;
+		    # This floods the logs if it blows up
+		    if (defined($parts{$part})) {
+			&Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
+		    }
+		    
+		    # check to see if part is turned off.
+		    
+		    if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
+			$parts{$part} = 1;
+		    }
+		}
+	    }
+	    my @sortedParts = sort keys %parts;
+	    $self->{PARTS} = \@sortedParts;
         }
         
-        
-        my @sortedParts = sort keys %parts;
-        $self->{PARTS} = \@sortedParts;
 
+        # These hashes probably do not need names that end with "Hash"....
         my %responseIdHash;
         my %responseTypeHash;
 
@@ -3380,19 +4383,19 @@ sub extractParts {
         }
 
         # Now, the unfortunate thing about this is that parts, part name, and
-        # response if are delimited by underscores, but both the part
+        # response id are delimited by underscores, but both the part
         # name and response id can themselves have underscores in them.
         # So we have to use our knowlege of part names to figure out 
         # 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 = '';
                 my @partChunks = split /_/, $partStuff;
                 my $i = 0;
-
                 for ($i = 0; $i < scalar(@partChunks); $i++) {
                     if ($partIdSoFar) { $partIdSoFar .= '_'; }
                     $partIdSoFar .= $partChunks[$i];
@@ -3400,13 +4403,35 @@ sub extractParts {
                         my @otherChunks = @partChunks[$i+1..$#partChunks];
                         my $responseId = join('_', @otherChunks);
                         push @{$responseIdHash{$partIdSoFar}}, $responseId;
-                        $responseTypeHash{$partIdSoFar} = $responseType;
-                        last;
+                        push @{$responseTypeHash{$partIdSoFar}}, $responseType;
                     }
                 }
             }
         }
-
+	my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
+        #
+        # Reorder the arrays in the %responseIdHash and %responseTypeHash
+	if ($resorder) {
+	    my @resorder=split(/,/,$resorder);
+	    foreach my $part (keys(%responseIdHash)) {
+		my $i=0;
+		my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
+		my @neworder;
+		foreach my $possibleid (@resorder) {
+		    if (exists($resids{$possibleid})) {
+			push(@neworder,$resids{$possibleid});
+		    }
+		}
+		my @ids;
+		my @type;
+		foreach my $element (@neworder) {
+		    push (@ids,$responseIdHash{$part}->[$element]);
+		    push (@type,$responseTypeHash{$part}->[$element]);
+		}
+		$responseIdHash{$part}=\@ids;
+		$responseTypeHash{$part}=\@type;
+	    }
+	}
         $self->{RESPONSE_IDS} = \%responseIdHash;
         $self->{RESPONSE_TYPES} = \%responseTypeHash;
     }
@@ -3594,13 +4619,17 @@ 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 seperate if statements in case we ever do more with this
+    # 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_override') {return $self->CORRECT_BY_OVERRIDE; }
+    if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
+    if ($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; }
@@ -3704,6 +4733,7 @@ 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;
@@ -3716,14 +4746,35 @@ sub status {
     # dimension and 5 entries on the other, which we want to colorize,
     # plus network failure and "no date data at all".
 
+    #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
     if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
 
-    my $suppressFeedback = lc($self->parmval("problemstatus", $part)) eq 'no';
+    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 ($self->duedate($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) {
@@ -3744,7 +4795,7 @@ sub status {
 
     if ($dateStatus == PAST_DUE_ANSWER_LATER ||
         $dateStatus == PAST_DUE_NO_ANSWER ) {
-        return $dateStatus; 
+        return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus; 
     }
 
     if ($dateStatus == ANSWER_OPEN) {
@@ -3762,7 +4813,7 @@ sub status {
     if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
         # and there are TRIES LEFT:
         if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
-            return TRIES_LEFT;
+            return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
         }
         return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
     }
@@ -3771,6 +4822,97 @@ sub status {
     return OPEN; 
 }
 
+sub CLOSED { return 23; }
+sub ERROR { return 24; }
+
+=pod
+
+B<Simple Status>
+
+Convenience method B<simpleStatus> provides a "simple status" for the resource.
+"Simple status" corresponds to "which icon is shown on the
+Navmaps". There are six "simple" statuses:
+
+=over 4
+
+=item * B<CLOSED>: The problem is currently closed. (No icon shown.)
+
+=item * B<OPEN>: The problem is open and unattempted.
+
+=item * B<CORRECT>: The problem is correct for any reason.
+
+=item * B<INCORRECT>: The problem is incorrect and can still be
+completed successfully.
+
+=item * B<ATTEMPTED>: The problem has been attempted, but the student
+does not know if they are correct. (The ellipsis icon.)
+
+=item * B<ERROR>: There is an error retrieving information about this
+problem.
+
+=back
+
+=cut
+
+# This hash maps the composite status to this simple status, and
+# can be used directly, if you like
+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,
+      ANSWER_OPEN()           => INCORRECT,
+      OPEN_LATER()            => CLOSED,
+      TRIES_LEFT()            => OPEN,
+      INCORRECT()             => INCORRECT,
+      OPEN()                  => OPEN,
+      ATTEMPTED()             => ATTEMPTED,
+      ANSWER_SUBMITTED()      => ATTEMPTED
+     );
+
+sub simpleStatus {
+    my $self = shift;
+    my $part = shift;
+    my $status = $self->status($part);
+    return $compositeToSimple{$status};
+}
+
+=pod
+
+B<simpleStatusCount> will return an array reference containing, in
+this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
+and ERROR parts the given problem has.
+
+=cut
+    
+# This maps the status to the slot we want to increment
+my %statusToSlotMap = 
+    (
+     OPEN()      => 0,
+     CLOSED()    => 1,
+     CORRECT()   => 2,
+     INCORRECT() => 3,
+     ATTEMPTED() => 4,
+     ERROR()     => 5
+     );
+
+sub statusToSlot { return $statusToSlotMap{shift()}; }
+
+sub simpleStatusCount {
+    my $self = shift;
+
+    my @counts = (0, 0, 0, 0, 0, 0, 0);
+    foreach my $part (@{$self->parts()}) {
+	$counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
+    }
+
+    return \@counts;
+}
+
 =pod
 
 B<Completable>
@@ -3802,15 +4944,18 @@ sub completable {
         # "If any of the parts are open, or have tries left (implies open),
         # and it is not "attempted" (manually graded problem), it is
         # not "complete"
-        if (!(($status == OPEN() || $status == TRIES_LEFT()) 
-              && $self->getCompletionStatus($part) != ATTEMPTED()
-              && $status != ANSWER_SUBMITTED())) {
-            return 0;
-        }
+	if ($self->getCompletionStatus($part) == ATTEMPTED() ||
+	    $status == ANSWER_SUBMITTED() ) {
+	    # did this part already, as well as we can
+	    next;
+	}
+	if ($status == OPEN() || $status == TRIES_LEFT()) {
+	    return 1;
+	}
     }
         
     # If all the parts were complete, so was this problem.
-    return 1;
+    return 0;
 }
 
 =pod
@@ -3837,6 +4982,7 @@ sub getNext {
     my $to = $self->to();
     foreach my $branch ( split(/,/, $to) ) {
         my $choice = $self->{NAV_MAP}->getById($branch);
+        #if (!$choice->condition()) { next; }
         my $next = $choice->goesto();
         $next = $self->{NAV_MAP}->getById($next);
 
@@ -3865,7 +5011,8 @@ sub browsePriv {
         return $self->{BROWSE_PRIV};
     }
 
-    $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre', $self->src());
+    $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
+						    $self->symb());
 }
 
 =pod