--- loncom/interface/coursecatalog.pm	2008/09/23 14:41:00	1.43
+++ loncom/interface/coursecatalog.pm	2010/07/08 23:19:19	1.63
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Handler for displaying the course catalog interface
 #
-# $Id: coursecatalog.pm,v 1.43 2008/09/23 14:41:00 bisitz Exp $
+# $Id: coursecatalog.pm,v 1.63 2010/07/08 23:19:19 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -87,10 +87,15 @@ sub handler {
     }
     &Apache::loncommon::extract_categories($cathash,\@cats,\@trails,\%allitems,
                                            \%idx,\@jsarray,$subcats);
+    my ($numtitles,@codetitles);
     if ($env{'form.coursenum'} ne '' && &user_is_known()) {
-        &course_details($r,$codedom,$formname,$domdesc,\@trails,\%allitems);
+        if ($env{'form.currcat_0'} eq 'instcode::0') {
+            $numtitles = &instcode_course_selector($r,$codedom,$formname,$domdesc,
+                                                   undef,undef,\@codetitles);
+        }
+        &course_details($r,$codedom,$formname,$domdesc,\@trails,\%allitems,\@codetitles);
     } else {
-        my ($catlinks,$has_subcats) = &category_breadcrumbs($codedom,@cats);
+        my ($catlinks,$has_subcats,$selitem) = &category_breadcrumbs($codedom,@cats);
         my $catjs = <<"ENDSCRIPT";
 
 function setCatDepth(depth) {
@@ -114,37 +119,57 @@ function setCourseId(caller) {
 
 ENDSCRIPT
         $catjs .= &courselink_javascript(); 
-        my $numtitles;
         if ($env{'form.currcat_0'} eq 'instcode::0') {
             $numtitles = &instcode_course_selector($r,$codedom,$formname,$domdesc,
-                                                   $catlinks,$catjs);
+                                                   $catlinks,$catjs,\@codetitles);
             if ($env{'form.state'} eq 'listing') {
-                $r->print(&print_course_listing($codedom,$numtitles));
+                $r->print(&print_course_listing($codedom,$numtitles,undef,undef,undef,
+                                                \@codetitles));
             }
         } else {
             my (%add_entries);
+            my ($currdepth,$deeper) = &get_depth_values();
+            if ($selitem) {
+                my $alert = &mt('Choose a subcategory to display');
+                if (!$deeper) {
+                    $alert = &mt('Choose a category to display');
+                }
+                $catjs .= <<ENDJS;
+function check_selected() {
+    if (document.coursecats.$selitem.options[document.coursecats.$selitem.selectedIndex].value == "") {
+        alert('$alert');
+        return false;
+    }
+}
+ENDJS
+            }
             $catjs = '<script type="text/javascript">'."\n".$catjs."\n".'</script>';
             &cat_header($r,$codedom,$catjs,\%add_entries,$catlinks);
             if ($env{'form.currcat_0'} ne '') {
                 $r->print('<form name="'.$formname.
                           '" method="post" action="/adm/coursecatalog">'.
                           &additional_filters($codedom,$has_subcats)."\n");
-                my ($currdepth,$deeper) = &get_depth_values();
                 $r->print('<input type="hidden" name="catalog_maxdepth" value="'.
                           $deeper.'" />'."\n");
                 for (my $i=0; $i<$deeper; $i++) {
                     $r->print('<input type="hidden" name="currcat_'.$i.'" value="'.$env{'form.currcat_'.$i}.'" />'."\n");
                 }
+                my $display_button;
+                if ($env{'form.currcat_0'} eq 'communities::0') {
+                    $display_button = &mt('Display communities');
+                } else {
+                    $display_button = &mt('Display courses');
+                }
                 $r->print('<input type="hidden" name="coursenum" value="" />'."\n".
                           '<input type="hidden" name="sortby" value="" />'."\n".
                           '<input type="hidden" name="state" value="listing" />'."\n".
                           '<input type="hidden" name="showdom" value="'.
                           $env{'form.showdom'}.'" />'.
                           '<input type="submit" name="catalogfilter" value="'.
-                          &mt('Display courses').'" /></form><br /><br />');
+                          $display_button.'" /></form><br /><br />');
             }
             if ($env{'form.state'} eq 'listing') {
-                $r->print(&print_course_listing($codedom,undef,\@trails,\%allitems,$subcats));
+                $r->print(&print_course_listing($codedom,undef,\@trails,\%allitems,$subcats,\@codetitles));
             }
         }
     }
@@ -153,34 +178,49 @@ ENDSCRIPT
 }
 
 sub course_details {
-    my ($r,$codedom,$formname,$domdesc,$trails,$allitems) = @_;
+    my ($r,$codedom,$formname,$domdesc,$trails,$allitems,$codetitles) = @_;
     my $output;
     my %add_entries = (topmargin    => "0",
                        marginheight => "0",);
     my $js = '<script type="text/javascript">'."\n".
              &courselink_javascript().'</script>'."\n";
     my $start_page =
-        &Apache::loncommon::start_page('Course Catalog',$js,
-                                           {
-                                             'add_entries' => \%add_entries,
-                                             'no_inline_link'   => 1,});
+        &Apache::loncommon::start_page('Course/Community Catalog',$js,
+                                           {'add_entries' => \%add_entries, });
     $r->print($start_page);
     if ($env{'form.numtitles'} > 0) {
         &Apache::lonhtmlcommon::add_breadcrumb
                 ({href=>"/adm/coursecatalog",
-                  text=>"Select courses"});
+                  text=>"Course/Community Catalog"});
+    }
+    my $brtextone = 'Course listing';
+    my $brtexttwo = 'Course details';
+    if ($env{'form.currcat_0'} eq 'communities::0') {
+        $brtextone = 'Community listing';
+        $brtexttwo = 'Community details';
     }
     &Apache::lonhtmlcommon::add_breadcrumb
              ({href=>"javascript:document.$formname.submit()",
-              text=>"Course listing"},
-             {text=>"Course details"});
-    $r->print(&Apache::lonhtmlcommon::breadcrumbs('Course Details'));
-    $r->print('<br />'.&mt('Detailed course information:').'<br /><br />'.
-              &print_course_listing($codedom,undef,$trails,$allitems).
+              text=>$brtextone},
+             {text=>$brtexttwo});
+    $r->print(&Apache::lonhtmlcommon::breadcrumbs('Course/Community Catalog'));
+    $r->print('<br />');
+    if ($env{'form.currcat_0'} eq 'communities::0') {
+        $r->print(&mt('Detailed community information:'));
+    } else {
+        $r->print(&mt('Detailed course information:'));
+    }
+    $r->print('<br /><br />'.
+              &print_course_listing($codedom,undef,$trails,$allitems,undef,$codetitles).
               '<br /><br />');
     $r->print('<form name="'.$formname.'" method="post" action="/adm/coursecatalog">'.
-              '<a href = "javascript:document.coursecatalog.submit()">'.
-              &mt('Back to course listing').'</a>'.
+              '<a href = "javascript:document.coursecatalog.submit()">');
+    if ($env{'form.currcat_0'} eq 'communities::0') {
+        $r->print(&mt('Back to community listing'));
+    } else {
+        $r->print(&mt('Back to course listing'));
+    }
+    $r->print('</a>'.
               &Apache::lonhtmlcommon::echo_form_input(['coursenum','catalogfilter',
                                                        'showdetails','courseid']).'</form>');
     return;
@@ -212,87 +252,23 @@ function ToSelfenroll(courseid) {
 END
 }
 
-
 sub instcode_course_selector {
-    my ($r,$codedom,$formname,$domdesc,$catlinks,$catjs) = @_;
+    my ($r,$codedom,$formname,$domdesc,$catlinks,$catjs,$codetitles) = @_;
     my %coursecodes = ();
     my %codes = ();
-    my @codetitles = ();
     my %cat_titles = ();
     my %cat_order = ();
-    my %idlist = ();
-    my %idnums = ();
-    my %idlist_titles = ();
-    my %by_year;
-    my %by_sem;
-    my %by_dept;
     my %cat_items;
     my $caller = 'global';
     my $format_reply;
-    my $totcodes = 0;
-    my $jscript = '';
-    my ($numtitles,$lasttitle);
     my %add_entries = (topmargin    => "0",
                        marginheight => "0",);
-    my $js;
-    $totcodes = &Apache::courseclassifier::retrieve_instcodes(\%coursecodes,$codedom);
-    if ($totcodes > 0) {
-        $format_reply = &Apache::lonnet::auto_instcode_format($caller,$codedom,\%coursecodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
-        if ($format_reply eq 'ok') {
-            my $numtypes = @codetitles;
-            &Apache::courseclassifier::build_code_selections(\%codes,\@codetitles,\%cat_titles,\%cat_order,\%idlist,\%idnums,\%idlist_titles);
-            my ($scripttext,$longtitles) = &Apache::courseclassifier::javascript_definitions(\@codetitles,\%idlist,\%idlist_titles,\%idnums,\%cat_titles);
-            my $longtitles_str = join('","',@{$longtitles});
-            my $allidlist = $idlist{$codetitles[0]};
-            $numtitles = @codetitles;
-            $lasttitle = $numtitles;
-            if ($numtitles > 4) {
-                $lasttitle = 4;
-            }
-            if ($numtitles == 0) {
-                if (!defined($env{'form.state'})) {
-                    $env{'form.state'} = 'listing';
-                }
-            } else {
-                my @data = ('top');
-                for (my $k=0; $k<$lasttitle; $k++) {
-                    my $cat = $codetitles[$k];
-                    my $level = 1;
-                    $level = &recurse_options($codetitles[$k],$idlist{$codetitles[$k]},$level,$cat,\%cat_items,\@data,\%by_year,\%by_sem,\%by_dept);
-                }
-                $scripttext .= &build_javascript(\%by_year,\%by_sem,\%by_dept,\%cat_order,\@codetitles);
-                $jscript .= &javascript_select_filler($formname,$scripttext,\@codetitles,$longtitles_str,$allidlist);
-                if ($env{'form.state'} eq 'listing') {
-                    $jscript .= '
-function setElements() {
-';
-                    for (my $i=0; $i<@codetitles-1; $i++) {
-                        if ($env{'form.'.$codetitles[$i]} != -1) {
-                            $jscript .= '
-    for (var j=0; j<document.'.$formname.'.'.$codetitles[$i].'.length; j++) {
-        if (document.'.$formname.'.'.$codetitles[$i].'[j].value == "'.$env{'form.'.$codetitles[$i]}.'") {
-            document.'.$formname.'.'.$codetitles[$i].'.selectedIndex = j;
-        }
-    }
-';
-                        }
-                    }
-                    $jscript .= '   courseSet()'."\n";
-                    if ($env{'form.'.$codetitles[-1]} != -1) {
-                        $jscript .= '
-    for (var j=0; j<document.'.$formname.'.'.$codetitles[-1].'.length; j++) {
-        if (document.'.$formname.'.'.$codetitles[-1].'[j].value == "'.$env{'form.'.$codetitles[-1]}.'") {
-            document.'.$formname.'.'.$codetitles[-1].'.selectedIndex = j;
-        }
-    }
-';
-                    }
-                    $jscript .= '}';
-                }
-            }
-        }
-        $js = '<script type"text/javascript">'."\n$jscript\n$catjs\n".
+    my ($jscript,$totcodes,$numtitles,$lasttitle) = 
+        &Apache::courseclassifier::instcode_selectors_data($codedom,$formname,
+                           \%cat_items,$codetitles,\%cat_titles,\%cat_order);
+    my $js = '<script type"text/javascript">'."\n$jscript\n$catjs\n".
               '</script>';
+    if ($totcodes) {
         if (($env{'form.state'} eq 'listing') && ($numtitles > 0)) {
             $add_entries{'onLoad'} = 'setElements()';
         }
@@ -304,43 +280,9 @@ function setElements() {
                   '<input type="hidden" name="currcat_0" value="instcode::0" />'.
                   &additional_filters($codedom));
         if ($numtitles > 0) {
-            $r->print('<b>'.&mt('Choose which course(s) to list.').'</b><br />');
-            $r->print('<table><tr>');
-            for (my $k=0; $k<$lasttitle-1; $k++) {
-                my (@items,@unsorted);
-                if (ref($cat_items{$codetitles[$k]}) eq 'ARRAY') {
-                    @unsorted = @{$cat_items{$codetitles[$k]}};
-                }
-                &Apache::courseclassifier::sort_cats($k,\%cat_order,\@codetitles,\@unsorted,\@items);
-                my @longitems;
-                if (defined($cat_titles{$codetitles[$k]})) {
-                    foreach my $item (@items) {
-                        push(@longitems,$cat_titles{$codetitles[$k]}{$item});
-                    }
-                } else {
-                    @longitems = @items;
-                }
-                $r->print('<td align="center">'.$codetitles[$k].'<br />'."\n".
-                          '<select name="'.$codetitles[$k].'" onChange="courseSet()"');
-                $r->print('>'."\n".'<option value="0" />All'."\n");
-                for (my $i=0; $i<@items; $i++) {
-                    if ($longitems[$i] eq '') {
-                        $longitems[$i] = $items[$i];
-                    }
-                    $r->print(' <option value="'.$items[$i].'">'.$longitems[$i].'</option>');
-                }
-                $r->print('</select></td>');
-            }
-            $r->print('<td align="center">'.$codetitles[$lasttitle-1].'<br />'."\n".
-                      '<select name="'.$codetitles[$lasttitle-1].'">'."\n".
-                      '<option value="0">All'."\n".
-                      '</option>'."\n".'</select>'."\n".
-                 '</td></tr></table>'."\n");
-            if ($numtitles > 4) {
-                $r->print('<br /><br />'.$codetitles[$numtitles-1].'<br />'."\n".
-                '<input type="text" name="'.$codetitles[$numtitles-1].'" /><br />'."\n");
-            }
-            $r->print('<br />');
+            $r->print('<b>'.&mt('Choose which course(s) to list.').'</b><br />'.
+                      &Apache::courseclassifier::build_instcode_selectors($numtitles,
+                       $lasttitle,\%cat_items,$codetitles,\%cat_titles,\%cat_order));
         }
         $r->print('<input type="hidden" name="coursenum" value="" />'."\n".
                   '<input type="hidden" name="sortby" value="" />'."\n".
@@ -351,6 +293,7 @@ function setElements() {
                   '<input type="hidden" name="numtitles" value="'.$numtitles.
                   '" /></form><br /><br />');
     } else {
+        $js = '<script type"text/javascript">'."\n$catjs\n".'</script>';
         &cat_header($r,$codedom,$js,\%add_entries,$catlinks,$numtitles);
         my $cat_maxdepth = $env{'form.catalog_maxdepth'};
         $r->print('<form name="'.$formname.'" method="post" action="/adm/coursecatalog">'.
@@ -365,92 +308,112 @@ function setElements() {
 sub cat_header {
     my ($r,$codedom,$js,$add_entries,$catlinks,$numtitles) = @_;
     my $start_page =
-        &Apache::loncommon::start_page('Course Catalog',$js,
-                                       {
-                                         'add_entries' => $add_entries,
-                                         'no_inline_link'   => 1,});
+        &Apache::loncommon::start_page('Other',$js,
+                                       { 'add_entries' => $add_entries, });
     $r->print($start_page);
+    my $brtext = 'Course listing';
+    if ($env{'form.currcat_0'} eq 'communities::0') {
+        $brtext = 'Community listing';
+    }
     if ($env{'form.state'} eq 'listing') {
         if ($numtitles > 0) {
             &Apache::lonhtmlcommon::add_breadcrumb
                 ({href=>"/adm/coursecatalog",
-                  text=>"Select courses"},
-                 {text=>"Course listing"});
+                  text=>"Course/Community Catalog"},
+                 {text=>$brtext});
         } else {
             &Apache::lonhtmlcommon::add_breadcrumb
-            ({text=>"Course listing"});
+            ({text=>$brtext});
         }
-        $r->print(&Apache::lonhtmlcommon::breadcrumbs('Course Listing'));
     } else {
         &Apache::lonhtmlcommon::add_breadcrumb
         ({href=>"/adm/coursecatalog",
-          text=>"Select courses"});
-        $r->print(&Apache::lonhtmlcommon::breadcrumbs('Select courses'));
+          text=>"Course/Community Catalog"});
     }
+    $r->print(&Apache::lonhtmlcommon::breadcrumbs('Course/Community Catalog'));
+    my $onchange = 'this.form.submit()';
     $r->print('<form name="coursecatdom" method="post" action="/adm/coursecatalog">'.
               '<table border="0"><tr><td><b>'.&mt('Domain:').'</b></td><td>'.
-              &Apache::loncommon::select_dom_form($codedom,'showdom','',1).
-	      '&nbsp;<input type="submit" name="godom" value="'.&mt('Change').'" /></td></tr></table></form>'.
-	      '<form name="coursecats" method="post" action="/adm/coursecatalog">'.
+              &Apache::loncommon::select_dom_form($codedom,'showdom','',1,$onchange));
+    if (!$onchange) {
+	   $r->print('&nbsp;<input type="submit" name="godom" value="'.&mt('Change').'" />');
+    }
+    $r->print('</td></tr></table></form>'.
+	      '<form name="coursecats" method="post" action="/adm/coursecatalog"'.
+              ' onsubmit="return check_selected();">'.
               '<table border="0"><tr>'.$catlinks.'</tr></table></form>');
     return;
 }
 
 sub category_breadcrumbs {
     my ($dom,@cats) = @_;
+    my $crumbsymbol = ' &#x25b6; ';
     my ($currdepth,$deeper) = &get_depth_values();
-    my $currcat_str = '<input type="hidden" name="catalog_maxdepth" value="'.$deeper.'" /><input type="hidden" name="showdom" value="'.$dom.'" />';
-    my $catlinks = '<td valign="top"><b>'.&mt('Catalog:').'</b></td><td><table><tr>';
+    my $currcat_str = 
+        '<input type="hidden" name="catalog_maxdepth" value="'.$deeper.'" />'.
+        '<input type="hidden" name="showdom" value="'.$dom.'" />';
+    my $catlinks = '<td valign="top"><b>'.&mt('Catalog:').'</b></td><td><table><tr><td>';
     my $has_subcats;
-    for (my $i=0; $i<$deeper; $i++) {
-        $currcat_str .= '<input type="hidden" name="currcat_'.$i.'" value="'.$env{'form.currcat_'.$i}.'" />';
-        my ($cattitle,$shallower);
-        if ($i == 0) {
-            $cattitle = &mt('Main Categories');
-        } else {
-            $shallower = $i-1;
-            my ($cat,$container,$depth) = map { &unescape($_); } split(/:/,$env{'form.currcat_'.$shallower});
-            $cattitle = $cat;
-        }
-        $catlinks .= '<td valign="top"><a href="javascript:setCatDepth('."'$shallower'".')">'.$cattitle.'</a>-&gt;</td>';
-    }
-    if ($deeper == 0) {
-        $catlinks .= '<td>'.&mt('Main Categories').':&nbsp;';
-        if (ref($cats[0]) eq 'ARRAY') {
-            if ((@{$cats[0]} == 1) && ($cats[0][0] eq 'instcode')) {
-                $catlinks .= &mt('Official courses (with institutional codes)').
-                             '<input type="hidden" name="currcat_0" value="instcode::0" />';
+    my $selitem;
+    if (ref($cats[0]) eq 'ARRAY') {
+        if (@{$cats[0]} == 0) {
+            $catlinks .= &mt('No categories defined in this domain'); 
+        } elsif (@{$cats[0]} == 1) {
+            if ($cats[0][0] eq 'instcode') {
+                $catlinks .= &mt('Official courses (with institutional codes)');
                 $env{'form.currcat_0'} = 'instcode::0';
+            } elsif ($cats[0][0] eq 'communities') {
+                $catlinks .= &mt('Communities');
+                $env{'form.currcat_0'} = 'communities::0';
             } else {
-                $has_subcats = 1;
-                $catlinks .= '<select name="currcat_0">'."\n";
-                if (@{$cats[0]} > 1) {
-                    my $selstr;
-                    if ($env{'form.currcat_0'} eq '') {
-                        $selstr = ' selected="selected" ';
-                    }
-                    $catlinks .= '<option value=""  selected="selected">'.&mt('Select').'</option>'."\n";
-                }
-                for (my $i=0; $i<@{$cats[0]}; $i++) {
-                    my $name = $cats[0][$i];
-                    my $item = &escape($name).'::0';
-                    $catlinks .= '<option value="'.$item.'">';
-                    if ($name eq 'instcode') {
-                        $catlinks .= &mt('Official courses (with institutional codes)');
-                    } else {
-                        $catlinks .= $name;
-                    }
-                    $catlinks .= '</option>'."\n";
-                }
-                $catlinks .= '</select>'."\n".
-                             '&nbsp;<input type="submit" name="gocats" value="'.&mt('Change').'" />';
+                my $name = $cats[0][0];
+                my $item = &escape($name).'::0';
+                $catlinks .= $name;
+                $env{'form.currcat_0'} = $item;
             }
+            $currcat_str .= '<input type="hidden" name="currcat_0" value="'.$env{'form.currcat_0'}.'" />';
         } else {
-            $catlinks .= &mt('Official courses (with institutional codes)').
-                         '<input type="hidden" name="currcat_0" value="instcode::0" />';
-            $env{'form.currcat_0'} = 'instcode::0';
+            $catlinks .= &main_category_selector(@cats);
+            if (($env{'form.currcat_0'} ne '') && 
+                ($env{'form.currcat_0'} ne 'instcode::0')) {
+                $catlinks .= $crumbsymbol;
+            } else {
+                $catlinks .= '</td>';
+            }
         }
     } else {
+        $catlinks .= &mt('Official courses (with institutional codes)');
+                     $env{'form.currcat_0'} = 'instcode::0';
+         $currcat_str .= '<input type="hidden" name="currcat_0" value="'.$env{'form.currcat_0'}.'" />';
+    }
+    if ($deeper) {
+        for (my $i=1; $i<=$deeper; $i++) {
+            my $shallower = $i-1;
+            next if ($shallower == 0);
+            my ($cat,$container,$depth) = map { &unescape($_); } split(/:/,$env{'form.currcat_'.$shallower});
+            if ($cat ne '') {
+                $catlinks .= '<td valign="top">'.
+                             '<select name="currcat_'.$shallower.'" onchange="'.
+                             'setCatDepth('."'$shallower'".');this.form.submit();">';
+                if (ref($cats[$shallower]{$container}) eq 'ARRAY') {
+                    $catlinks .= '<option value="">'.&mt('De-select').'</option>';
+                    for (my $j=0; $j<@{$cats[$shallower]{$container}}; $j++) {
+                        my $name = $cats[$shallower]{$container}[$j];
+                        my $item = &escape($name).':'.$container.':'.$shallower;
+                        my $selected = '';
+                        if ($item eq $env{'form.currcat_'.$shallower}) {
+                            $selected = ' selected="selected"';
+                        }
+                        $catlinks .= 
+                           '<option value="'.$item.'"'.$selected.'>'.$name.'</option>';
+                    }
+                }
+                $catlinks .= '</select>';
+            }
+            unless ($i == $deeper) {
+                $catlinks .= $crumbsymbol;
+            } 
+        }
         my ($cat,$container,$depth);
         if ($env{'form.currcat_'.$currdepth} eq '') {
             my $shallower = $currdepth - 1;
@@ -458,29 +421,64 @@ sub category_breadcrumbs {
         } else {
             ($cat,$container,$depth) = map { &unescape($_); } split(/:/,$env{'form.currcat_'.$currdepth});
         }
-        my $deeper = $depth +1;
-        my $currcat = $cat;
-        if ($cat eq 'instcode') {
-            $currcat = &mt('Official courses (with institutional codes)');
-        }
-        $catlinks .= '<td>'.$currcat;
-        if (ref($cats[$deeper]{$cat}) eq 'ARRAY') {
+        my $deeperlevel = $depth +1;
+        if (ref($cats[$deeperlevel]{$cat}) eq 'ARRAY') {
             $has_subcats = 1;
-            my $selstr;
-            $catlinks .= ':&nbsp;<select name="currcat_'.$deeper.'">'.
-                         '<option value="" selected="selected">'.
-                         &mt('Select').'</option>';
-            for (my $k=0; $k<@{$cats[$deeper]{$cat}}; $k++) {
-                my $name = $cats[$deeper]{$cat}[$k];
-                my $item = &escape($name).':'.&escape($cat).':'.$deeper;
+            my $buttontext = &mt('Show subcategories');
+            my $selitem = 'currcat_'.$deeperlevel;
+            $catlinks .= '&nbsp;<select name="'.$selitem.'" onchange="this.form.submit()">';
+            if (@{$cats[$deeperlevel]{$cat}}) {
+                $catlinks .= '<option value="" selected="selected">'.
+                             &mt('Subcategory ...').'</option>';
+            }
+            for (my $k=0; $k<@{$cats[$deeperlevel]{$cat}}; $k++) {
+                my $name = $cats[$deeperlevel]{$cat}[$k];
+                my $item = &escape($name).':'.&escape($cat).':'.$deeperlevel;
                 $catlinks .= '<option value="'.$item.'">'.$name.'</option>'."\n";
             }
-            $catlinks .= '</select>'."\n".
-                         '&nbsp;<input type="submit" name="gocats" value="'.&mt('Change').'" />';
+            $catlinks .= '</select>'."\n";
+        } elsif ($cat ne 'instcode') {
+            $catlinks .= '&nbsp;'.&mt('(No subcategories)');
         }
+    } else {
+        $selitem = 'currcat_0';
     }
     $catlinks .= $currcat_str.'</td></tr></table></td>';
-    return ($catlinks,$has_subcats);
+    return ($catlinks,$has_subcats,$selitem);
+}
+
+sub main_category_selector {
+    my (@cats) = @_;
+    my $maincatlinks = '<select name="currcat_0" onchange="setCatDepth('."'0'".');this.form.submit();">'."\n";
+    if (ref($cats[0]) eq 'ARRAY') {
+        if (@{$cats[0]} > 1) {
+            my $selected = '';
+            if ($env{'form.currcat_0'} eq '') {
+                $selected = ' selected="selected"';    
+            }
+            $maincatlinks .= 
+                '<option value=""'.$selected.'>'.&mt('Select').'</option>'."\n";
+        }
+        for (my $i=0; $i<@{$cats[0]}; $i++) {
+            my $name = $cats[0][$i];
+            my $item = &escape($name).'::0';
+            my $selected;
+            if ($env{'form.currcat_0'} eq $item) {
+                $selected = ' selected="selected"';
+            }
+            $maincatlinks .= '<option value="'.$item.'"'.$selected.'>';
+            if ($name eq 'instcode') {
+                $maincatlinks .= &mt('Official courses (with institutional codes)');
+            } elsif ($name eq 'communities') {
+                $maincatlinks .= &mt('Communities');
+            } else {
+                $maincatlinks .= $name;
+            }
+            $maincatlinks .= '</option>'."\n";
+        }
+        $maincatlinks .= '</select>'."\n";
+    }
+    return $maincatlinks;
 }
 
 sub get_depth_values {
@@ -527,10 +525,15 @@ sub additional_filters {
     if ($env{'form.showselfenroll'}) {
         $show_selfenroll_status = 'checked="checked" ';
     }
+    my $selfenroll_text;
+    if ($env{'form.currcat_0'} eq 'communities::0') {
+        $selfenroll_text = &mt('Only show communities which allow self-enrollment');
+    } else {
+        $selfenroll_text = &mt('Only show courses which allow self-enrollment');
+    }
     $output .= '<tr><td>'.
                '<label><input type="checkbox" name="showselfenroll" value="1" '.
-               $show_selfenroll_status.'/>'.
-               &mt('Only show courses which allow self-enrollment').
+               $show_selfenroll_status.'/>'.$selfenroll_text.
                '</label></td></tr>';
     if (&user_is_dc($codedom)) {
         my $showdetails_status;
@@ -542,14 +545,20 @@ sub additional_filters {
              $showhidden_status = 'checked="checked" ';
         }
         my $dc_title = &Apache::lonnet::plaintext('dc');
+        my ($details_text,$hidden_text);
+        if ($env{'form.currcat_0'} eq 'communities::0') {
+            $details_text = &mt('Show full details for each community ([_1] only)',$dc_title);
+            $hidden_text = &mt('Include communities set to be hidden from catalog ([_1] only)',$dc_title);
+        } else {
+            $details_text = &mt('Show full details for each course ([_1] only)',$dc_title);
+            $hidden_text = &mt('Include courses set to be hidden from catalog ([_1] only)',$dc_title);
+        }
         $output .= '<tr><td>'."\n".
                    '<label><input type="checkbox" name="showdetails" value="1" '.
-                   $showdetails_status.'/>'.
-                   &mt('Show full details for each course ([_1] only)',$dc_title).
+                   $showdetails_status.'/>'.$details_text.
                    '</label>'."\n".'</td></tr><tr><td>'.
                    '<label><input type="checkbox" name="showhidden" value="1" '.
-                   $showhidden_status.'/>'.
-                   &mt('Include courses set to be hidden from catalog ([_1] only)',$dc_title).
+                   $showhidden_status.'/>'.$hidden_text.
                    '</label>'."\n".'</td></tr>';
     }
     $output .= '</table><br />';
@@ -569,113 +578,9 @@ sub user_is_dc {
     return;
 }
 
-sub recurse_options {
-    my ($currkey,$currlist,$level,$cat,$cat_options,$data,$by_year,$by_sem,$by_dept) = @_;
-    if (ref($currlist) eq 'HASH') {
-        $level ++;
-        foreach my $key (sort(keys(%{$currlist}))) {
-            $$data[$level-1]= $key;
-            &recurse_options($key,$currlist->{$key},$level,$cat,$cat_options,$data,$by_year,$by_sem,$by_dept);
-        }
-    } else {
-        $level --;
-        my @contents = split(/","/,$currlist);
-        foreach my $item (@contents) {
-            if (!grep(/^\Q$item\E$/,@{$cat_options->{$cat}})) {
-                push(@{$cat_options->{$cat}},$item);
-            }
-            if ($level == 3) {
-                if (!grep/^\Q$item\E$/,@{$by_year->{$data->[1]}->{$currkey}}) {
-                    push(@{$by_year->{$data->[1]}->{$currkey}},$item);                 
-                }
-                if (!grep/^\Q$item\E$/,@{$by_sem->{$data->[2]}->{$currkey}}) {
-                    push(@{$by_sem->{$data->[2]}->{$currkey}},$item);
-                }
-                if (!grep/^\Q$item\E$/,@{$by_dept->{$currkey}}) {
-                    push(@{$by_dept->{$currkey}},$item);
-                }
-
-            }
-        }
-    }
-    return $level;
-}
-
-sub build_javascript {
-    my ($by_year,$by_sem,$by_dept,$cat_order,$codetitles) = @_;
-    my @unsorted = keys(%{$by_year});
-    my @sorted_yrs; 
-    &Apache::courseclassifier::sort_cats('0',$cat_order,$codetitles,\@unsorted,\@sorted_yrs);
-    my $output = 'var idcse_by_yr_year = new Array("'.join('","',@sorted_yrs).'");'."\n".
-                 'var idcse_by_yr_dept = new Array('.scalar(@sorted_yrs).');'."\n".
-                 'var idcse_by_yr_num = new Array('.scalar(@sorted_yrs).');'."\n";
-    for (my $i=0; $i<@sorted_yrs; $i++) {
-        my $numkeys = keys(%{$by_year->{$sorted_yrs[$i]}});
-        $output .= " idcse_by_yr_num[$i] = new Array($numkeys);\n";
-        if (ref($by_year->{$sorted_yrs[$i]}) eq 'HASH') {
-            @unsorted = keys(%{$by_year->{$sorted_yrs[$i]}});
-            my @sorted_depts;
-            &Apache::courseclassifier::sort_cats('2',$cat_order,$codetitles,\@unsorted,\@sorted_depts);
-            $output .= qq| idcse_by_yr_dept[$i] = new Array ("|.join('","',@sorted_depts).'");'."\n";
-            for (my $j=0; $j<@sorted_depts; $j++) {
-                $output .= qq| idcse_by_yr_num[$i][$j] = new Array ("|;
-                $output .= join('","',sort(@{$by_year->{$sorted_yrs[$i]}->{$sorted_depts[$j]}})).'");'."\n";
-            }
-        }
-    }
-    @unsorted = keys(%{$by_sem});
-    my @sorted_sems;
-    &Apache::courseclassifier::sort_cats('1',$cat_order,$codetitles,\@unsorted,\@sorted_sems);
-    $output .=  'idcse_by_sem_sems = new Array("'.join('","',@sorted_sems).'");'."\n".
-                'idcse_by_sem_dept = new Array('.scalar(@sorted_sems).');'."\n".
-                'idcse_by_sem_num = new Array('.scalar(@sorted_sems).');'."\n";
-    for (my $i=0; $i<@sorted_sems; $i++) {
-        my $numkeys = keys(%{$by_sem->{$sorted_sems[$i]}});
-        $output .= " idcse_by_sem_num[$i] = new Array($numkeys);\n";
-        if (ref($by_sem->{$sorted_sems[$i]}) eq 'HASH') {
-            @unsorted = keys(%{$by_sem->{$sorted_sems[$i]}});
-            my @sorted_depts;
-            &Apache::courseclassifier::sort_cats('2',$cat_order,$codetitles,\@unsorted,\@sorted_depts);
-            $output .= qq| idcse_by_sem_dept[$i] = new Array("|.join('","',@sorted_depts).'");'."\n";
-            for (my $j=0; $j<@sorted_depts; $j++) {
-                $output .= qq| idcse_by_sem_num[$i][$j] = new Array ("|.join('","',sort(@{$by_sem->{$sorted_sems[$i]}->{$sorted_depts[$j]}})).'");'."\n";
-            }
-        }
-    }
-    @unsorted = keys(%{$by_dept});
-    my @sorted_deps;
-    &Apache::courseclassifier::sort_cats('2',$cat_order,$codetitles,\@unsorted,\@sorted_deps);
-    $output .= 'idcse_by_dep = new Array('.scalar(@sorted_deps).');'."\n"; 
-    for (my $k=0; $k<@sorted_deps; $k++) {
-        $output .= qq| idcse_by_dep[$k] = new Array ("|.join('","',sort(@{$by_dept->{$sorted_deps[$k]}})).'");'."\n";
-    }
-    return $output;
-}
-
 sub search_official_courselist {
-    my ($domain,$numtitles) = @_;
-    my $instcode;
-    if (defined($numtitles) && $numtitles == 0) {
-        $instcode = '.+';
-    } else {
-        my (%codedefaults,@code_order);
-        my $defaults_result = 
-            &Apache::lonnet::auto_instcode_defaults($domain,\%codedefaults,
-                                                    \@code_order);
-        if ($defaults_result eq 'ok') {
-            $instcode ='^';
-            foreach my $item (@code_order) {
-                if ($env{'form.'.$item} eq '0' ) {
-                    $instcode .= $codedefaults{$item}; 
-                } else {
-                    $instcode .= $env{'form.'.$item};
-                }
-            }
-            $instcode .= '$';
-        } else {
-            $instcode = '.';
-        }
-    }
+    my ($domain,$numtitles,$codetitles) = @_;
+    my $instcode = &Apache::courseclassifier::instcode_search_str($domain,$numtitles,$codetitles);
     my $showhidden;
     if (&user_is_dc($domain)) {
         $showhidden = $env{'form.showhidden'};
@@ -714,20 +619,25 @@ sub search_courselist {
         } else {
             $filterstr = $filter; 
         }
-        my $showhidden;
+        my ($showhidden,$typefilter);
         if (&user_is_dc($domain)) {
             $showhidden = $env{'form.showhidden'};
         }
+        if ($env{'form.currcat_0'} eq 'communities::0') {
+            $typefilter = 'Community';
+        } else {
+            $typefilter = '.';
+        }
         %courses = 
             &Apache::lonnet::courseiddump($domain,'.',1,'.','.','.',undef,undef,
-                                          '.',1,$env{'form.showselfenroll'},
+                                          $typefilter,1,$env{'form.showselfenroll'},
                                           $filterstr,$showhidden,'coursecatalog');
     }
     return %courses;
 }
 
 sub print_course_listing {
-    my ($domain,$numtitles,$trails,$allitems,$subcats) = @_;
+    my ($domain,$numtitles,$trails,$allitems,$subcats,$codetitles) = @_;
     my $output;
     my %courses;
     my $knownuser = &user_is_known();
@@ -742,17 +652,25 @@ sub print_course_listing {
                                                  $env{'form.coursenum'},
                                                  undef,undef,'.',1);
         if (keys(%courses) == 0) {
-            $output .= &mt('The courseID provided does not match a course in this domain.');
+            if ($env{'form.currcat_0'} eq 'communities::0') {
+                $output .= &mt('The courseID provided does not match a community in this domain.');
+            } else { 
+                $output .= &mt('The courseID provided does not match a course in this domain.');
+            }
             return $output;
         }
     } else {
         if ($env{'form.currcat_0'} eq 'instcode::0') {
-            %courses = &search_official_courselist($domain,$numtitles);
+            %courses = &search_official_courselist($domain,$numtitles,$codetitles);
         } else {
             %courses = &search_courselist($domain,$subcats);
         }
         if (keys(%courses) == 0) {
-            $output = &mt('No courses match the criteria you selected.');
+            if ($env{'form.currcat_0'} eq 'communities::0') {
+                $output = &mt('No communities match the criteria you selected.');
+            } else {
+                $output = &mt('No courses match the criteria you selected.');
+            }
             return $output;
         }
         if (($knownuser) && (!$env{'form.showdetails'}) && (!&user_is_dc($domain))) {
@@ -807,10 +725,14 @@ sub construct_data_table {
     }
     if ($knownuser) {
         if ($details) {
-            $output .=
-              '<th>'.&mt('Default Access Dates for Students').'</th>'.
-              '<th>'.&mt('Student Counts').'</th>'.
-              '<th>'.&mt('Auto-enrollment of[_1]registered students','<br />').'</th>';
+            if ($env{'form.currcat_0'} eq 'communities::0') {
+                $output .= '<th>'.&mt('Default Access Dates for Members').'</th>';
+            } else {
+                $output .=
+                    '<th>'.&mt('Default Access Dates for Students').'</th>'.
+                    '<th>'.&mt('Student Counts').'</th>'.
+                    '<th>'.&mt('Auto-enrollment of[_1]registered students','<br />').'</th>';
+            }
         } else {
             $output .= '<th>'.&mt('Details').'</th>';
         }
@@ -888,7 +810,7 @@ sub build_courseinfo_hash {
             }
         }
         foreach my $owner (@owners) {
-            my ($ownername,$ownerdom) = @_; 
+            my ($ownername,$ownerdom); 
             if ($owner =~ /:/) {
                 ($ownername,$ownerdom) = split(/:/,$owner);
             } else {
@@ -1079,10 +1001,14 @@ sub courseinfo_row {
                '<td>'.$ownerlast.'</td>';
     if ($knownuser) {
         if ($details) {
-            $output .=
-               '<td>'.$accessdates.'</td>'. 
-               '<td>'.$counts.'</td>'.
-               '<td>'.$autoenrollment.'</td>';
+            if ($env{'form.currcat_0'} eq 'communities::0') {
+                $output .= '<td>'.$accessdates.'</td>';
+            } else { 
+                $output .=
+                    '<td>'.$accessdates.'</td>'. 
+                    '<td>'.$counts.'</td>'.
+                    '<td>'.$autoenrollment.'</td>';
+            }
         } else {
             $output .= "<td><a href=\"javascript:setCourseId('$cnum')\">".&mt('Show more details').'</a></td>';
         }
@@ -1173,145 +1099,6 @@ sub get_valid_classes {
     return $response;
 }
 
-sub javascript_select_filler {
-    my ($formname,$scripttext,$codetitles,$longtitles_str,$allidlist) = @_;
-    my $output = <<END;
-function courseSet() {
-    var longtitles = new Array ("$longtitles_str");
-    var valyr = document.$formname.Year.options[document.$formname.Year.selectedIndex].value
-    var valsem  = document.$formname.Semester.options[document.$formname.Semester.selectedIndex].value
-    var valdept = document.$formname.Department.options[document.$formname.Department.selectedIndex].value
-    var valclass = document.$formname.Number.options[document.$formname.Number.selectedIndex].value
-    var idyears = new Array("$allidlist");
-    var idyr = -1;
-    var idsem = -1;
-    var iddept = -1;
-    document.$formname.Number.length = 0;
-
-    $scripttext
-
-    selYear = document.$formname.Year.selectedIndex-1;
-    selSemester = document.$formname.Semester.selectedIndex-1;
-    selDepartment = document.$formname.Department.selectedIndex-1;
-    if (selYear == -1) {
-        if (selSemester == -1) {
-            if (selDepartment > -1) {
-                document.$formname.Number.options[0] =  new Option('All','0',false,false);
-                for (var k=0; k<idcse_by_dep[selDepartment].length; k++) {
-                    document.$formname.Number.options[k+1] = new Option(idcse_by_dep[selDepartment][k],idcse_by_dep[selDepartment][k],false,false);
-
-                }
-            } 
-            else {
-                document.$formname.Number.options[0] = new Option("All","0",true,true);
-            }
-        }
-        else {
-            if (selDepartment > -1) {
-                for (var i=0; i<idcse_by_sem_sems.length; i++) {
-                    if (idcse_by_sem_sems[i] == valsem) {
-                        idsem = i;
-                    }
-                }
-                if (idsem != -1) {
-                    for (var i=0; i<idcse_by_sem_dept[idsem].length; i++) {
-                        if (idcse_by_sem_dept[idsem][i] == valdept) {
-                            iddept = i;
-                        }
-                    }
-                }
-                if (iddept != -1) {
-                    document.$formname.Number.options[0] =  new Option('All','0',false,false);
-                    for (var k=0; k<idcse_by_sem_num[idsem][iddept].length; k++) {
-                        document.$formname.Number.options[k+1] = new Option(idcse_by_sem_num[idsem][iddept][k],idcse_by_sem_num[idsem][iddept][k],false,false);
-                    }
-                }
-                else {
-                    document.$formname.Number.options[0] =  new Option('No courses','0',true,true);
-                }
-            }
-            else {
-                document.$formname.Number.options[0] = new Option("All","0",true,true);
-            }
-        }
-    }
-    else {
-        if (selSemester == -1) {
-            if (selDepartment > -1) {
-                for (var i=0; i<idcse_by_yr_year.length; i++) {
-                    if (idcse_by_yr_year[i] == valyr) {
-                        idyr = i;
-                    }
-                }
-                if (idyr != -1) {      
-                    for (var i=0; i<idcse_by_yr_dept[idyr].length; i++) {
-                        if (idcse_by_yr_dept[idyr][i] == valdept) {
-                            iddept = i;
-                        }
-                    }
-                }
-                if (iddept != -1) {
-                    document.$formname.Number.options[0] =  new Option('All','0',false,false);
-                    for (var k=0; k<idcse_by_yr_num[idyr][iddept].length; k++) {
-                        document.$formname.Number.options[k+1] = new Option(idcse_by_yr_num[idyr][iddept][k],idcse_by_yr_num[idyr][iddept][k],false,false);
-                    }
-                } 
-                else {
-                    document.$formname.Number.options[0] =  new Option('No courses','0',true,true);
-                }
-            }
-            else {
-                document.$formname.Number.options[0] = new Option("All","0",true,true);
-            }
-        }
-        else {
-            if (selDepartment > -1) {
-                for (var k=0; k<idyears.length; k++) {
-                    if (idyears[k] == valyr) {
-                        idyr = k;
-                    }
-                }
-                if (idyr != -1) {
-                    for (var k=0; k<idsems[idyr].length; k++) {
-                        if (idsems[idyr][k] == valsem) {
-                            idsem = k;
-                        }
-                    }
-                }
-                if (idsem != -1) {
-                    for (var k=0; k<idcodes[idyr][idsem].length; k++) {
-                        if (idcodes[idyr][idsem][k] == valdept) {
-                            iddept = k;
-                        }
-                    }
-                }
-                if (iddept != -1) {
-                    document.$formname.Number.options[0] =  new Option('All','0',false,false);
-                    for (var i=0; i<idcourses[idyr][idsem][iddept].length; i++) {
-                        var display = idcourses[idyr][idsem][iddept][i];
-                        if (longtitles[3] == 1) {
-                            if (idcourseslongs[idyr][idsem][iddept][i] != "") {
-                                display = idcourseslongs[idyr][idsem][iddept][i]
-                            }
-                        }
-                        document.$formname.Number.options[i+1] = new Option(display,idcourses[idyr][idsem][iddept][i],false,false)
-                    }
-                } 
-                else {
-                    document.$formname.Number.options[0] =  new Option('No courses','0',true,true);
-                }
-            } 
-            else {
-                document.$formname.Number.options[0] =  new Option('All','0',true,true);
-            }
-        }
-        document.$formname.Number.selectedIndex = 0
-    }
-}
-END
-    return $output;
-}
-
 sub autoenroll_info {
     my ($coursehash,$now,$seclist,$xlist_items,$code,$owners,$cdom,$cnum) = @_;
     my $autoenrolldates = &mt('Not enabled');