--- loncom/interface/coursecatalog.pm	2006/08/29 21:03:11	1.1
+++ loncom/interface/coursecatalog.pm	2010/12/22 04:14:09	1.58.4.6
@@ -1,3 +1,7 @@
+# The LearningOnline Network with CAPA
+# Handler for displaying the course catalog interface
+#
+# $Id: coursecatalog.pm,v 1.58.4.6 2010/12/22 04:14:09 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -28,11 +32,11 @@ use strict;
 use lib qw(/home/httpd/lib/perl);
 use Apache::Constants qw(:common);
 use Apache::loncommon;
+use Apache::lonhtmlcommon;
 use Apache::lonnet;
 use Apache::lonlocal;
-use Apache::lonsupportreq;
+use Apache::courseclassifier;
 use Apache::lonacc;
-use lib '/home/httpd/lib/perl/';
 use LONCAPA;
 
 sub handler {
@@ -42,223 +46,733 @@ sub handler {
     if ($r->header_only) {
         return OK;
     }
+    my $handle = &Apache::lonnet::check_for_valid_session($r);
+    my $lonidsdir=$r->dir_config('lonIDsDir');
+    if ($handle ne '') {
+        &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
+    }
     &Apache::lonacc::get_posted_cgi($r);
     &Apache::lonlocal::get_language_handle($r);
-    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['sortby']);
-    my $codedom = $Apache::lonnet::perlvar{'lonDefDomain'};
-    my $ccode = '';
-    my %coursecodes = ();
-    my %codes = ();
-    my @codetitles = ();
-    my %cat_titles = ();
-    my %cat_order = ();
-    my %idlist = ();
-    my %idnums = ();
-    my %idlist_titles = ();
-    my $caller = 'global';
-    my $format_reply;
-    my $totcodes = 0;
-    my $jscript = '';
+    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+                                            ['sortby','showdom']);
+
+    my $codedom = &Apache::lonnet::default_login_domain();
+
+    if (($env{'user.domain'} ne '') && ($env{'user.domain'} ne 'public')) { 
+        $codedom = $env{'user.domain'};
+        if ($env{'request.role.domain'} ne '') {
+            $codedom = $env{'request.role.domain'};
+        }
+    }
     my $formname = 'coursecatalog';
-    $totcodes = &Apache::lonsupportreq::retrieve_instcodes(\%coursecodes,$codedom,$totcodes);
-    if ($totcodes > 0) {
-        if ($ccode eq '') {
-            $format_reply = &Apache::lonnet::auto_instcode_format($caller,$codedom,\%coursecodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
-            if ($format_reply eq 'ok') {
-                my $numtypes = @codetitles;
-                &Apache::lonsupportreq::build_code_selections(\%codes,\@codetitles,\%cat_titles,\%cat_order,\%idlist,\%idnums,\%idlist_titles);
-                &Apache::lonsupportreq::javascript_code_selections($formname,$numtypes,\%cat_titles,\$jscript,\%idlist,\%idnums,\%idlist_titles,\@codetitles);
-            }
-        }
-        if ($env{'form.state'} eq 'listing') {
-            $jscript .= '
-function setElements() {
-';
-            for (my $i=0; $i<@codetitles; $i++) {
-                if ($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[$i].'.selectedIndex = j;
+    if ($env{'form.showdom'} ne '') {
+        if (&Apache::lonnet::domain($env{'form.showdom'}) ne '') {
+            $codedom = $env{'form.showdom'};
         }
     }
-';
-                    $jscript .= '  courseSet('."'$codetitles[$i]'".');'."\n";
+    my $domdesc = &Apache::lonnet::domain($codedom,'description');
+    &Apache::lonhtmlcommon::clear_breadcrumbs();
+
+    my %domconfig =
+        &Apache::lonnet::get_dom('configuration',['coursecategories'],$codedom);
+    my (@cats,@trails,%allitems,%idx,@jsarray,%subcathash,$cathash);
+    if (ref($domconfig{'coursecategories'}) eq 'HASH') {
+        $cathash = $domconfig{'coursecategories'}{'cats'};
+    } else {
+        $cathash = {};
+    }
+    my $subcats;
+    if ($env{'form.withsubcats'}) {
+        $subcats = \%subcathash;
+    }
+    &Apache::loncommon::extract_categories($cathash,\@cats,\@trails,\%allitems,
+                                           \%idx,\@jsarray,$subcats);
+    my ($numtitles,@codetitles);
+    if ($env{'form.coursenum'} ne '' && &user_is_known()) {
+        &course_details($r,$codedom,$formname,$domdesc,\@trails,\%allitems,\@codetitles);
+    } else {
+        my ($catlinks,$has_subcats,$selitem) = &category_breadcrumbs($codedom,@cats);
+        my $catjs = <<"ENDSCRIPT";
+
+function setCatDepth(depth) {
+    document.coursecats.catalog_maxdepth.value = depth;
+    if (depth == '') {
+        document.coursecats.currcat_0.value = '';
+    }
+    document.coursecats.submit();
+    return;
+}
+
+function changeSort(caller) {
+    document.$formname.sortby.value = caller;
+    document.$formname.submit();
+}
+
+function setCourseId(caller) {
+    document.$formname.coursenum.value = caller;
+    document.$formname.submit();
+}
+
+ENDSCRIPT
+        $catjs .= &courselink_javascript(); 
+        if ($env{'form.currcat_0'} eq 'instcode::0') {
+            $numtitles = &instcode_course_selector($r,$codedom,$formname,$domdesc,
+                                                   $catlinks,$catjs,\@codetitles);
+            if ($env{'form.state'} eq 'listing') {
+                $r->print(&print_course_listing($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");
+                $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 {
-                    last;
+                    $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="'.
+                          $display_button.'" /></form><br /><br />');
             }
-            $jscript .= '}';
-            $jscript .= qq|
-function changeSort(caller) {
-    document.coursecatalog.sortby.value = caller;
-    document.coursecatalog.submit();
-}\n|;
-        }
-        my $js = '<script type"text/javascript">'."\n$jscript\n".
-                 '</script>';
-        my %add_entries = (topmargin    => "0",
-                           marginheight => "0",
-                           onLoad       =>"setElements()",);
-        my $start_page =
-            &Apache::loncommon::start_page('Course Catalog',$js,
-                                           { 
+            if ($env{'form.state'} eq 'listing') {
+                $r->print(&print_course_listing($codedom,undef,\@trails,\%allitems,$subcats,\@codetitles));
+            }
+        }
+    }
+    $r->print('<br />'.&Apache::loncommon::end_page());
+    return OK;
+}
+
+sub course_details {
+    my ($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 $start_page =
+        &Apache::loncommon::start_page('Course/Community Catalog',$js,
+                                           {
                                              'add_entries' => \%add_entries,
                                              'no_inline_link'   => 1,});
-        $r->print($start_page);
+    $r->print($start_page);
+    if ($env{'form.numtitles'} > 0) {
+        &Apache::lonhtmlcommon::add_breadcrumb
+                ({href=>"/adm/coursecatalog",
+                  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=>$brtextone},
+             {text=>$brtexttwo});
+    $r->print('<br />');
+    if ($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()">');
+    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;
+}
+
+sub courselink_javascript {
+    return <<"END";
+
+function ToSyllabus(cdom,cnum) {
+    if (cdom == '' || cdom == null) {
+        return;
+    }
+    if (cnum == '' || cnum == null) {
+        return;
+    }
+    document.linklaunch.action = "/public/"+cdom+"/"+cnum+"/syllabus";
+    document.linklaunch.submit();
+}
+
+function ToSelfenroll(courseid) {
+    if (courseid == '') {
+        return;
+    }
+    document.linklaunch.action = "/adm/selfenroll";
+    document.linklaunch.courseid.value = courseid;
+    document.linklaunch.submit();
+}
+
+END
+}
 
-        my $numtitles = @codetitles;
-        my $domdesc = $Apache::lonnet::domaindescription{$codedom};
-        $r->print('<h3>'.&mt('Display information about official [_1] courses in LON-CAPA:',$domdesc).'</h3>');
-        $r->print(&mt('<b>Choose which course(s) to list.</b><br />'));
-        $r->print('<form name="coursecatalog" method="post">'); 
+sub instcode_course_selector {
+    my ($r,$codedom,$formname,$domdesc,$catlinks,$catjs,$codetitles) = @_;
+    my %coursecodes = ();
+    my %codes = ();
+    my %cat_titles = ();
+    my %cat_order = ();
+    my %cat_items;
+    my $caller = 'global';
+    my $format_reply;
+    my %add_entries = (topmargin    => "0",
+                       marginheight => "0",);
+    my ($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)) {
+            $add_entries{'onLoad'} = 'setElements()';
+        }
+        &cat_header($r,$codedom,$js,\%add_entries,$catlinks,$numtitles);
+        my $cat_maxdepth = $env{'form.catalog_maxdepth'};
+        $r->print('<form name="'.$formname.'" method="post" action="/adm/coursecatalog">'.
+                  '<input type="hidden" name="catalog_maxdepth" value="'.$cat_maxdepth.'" />'."\n".
+                  '<input type="hidden" name="showdom" value="'.$env{'form.showdom'}.'" />'."\n".
+                  '<input type="hidden" name="currcat_0" value="instcode::0" />'.
+                  &additional_filters($codedom));
         if ($numtitles > 0) {
-            my $lasttitle = $numtitles;
-            if ($numtitles > 4) {
-                $lasttitle = 4;
-            }
-            $r->print('<table><tr><td>'.$codetitles[0].'<br />'."\n".
-                  '<select name="'.$codetitles[0].'" onChange="courseSet('."'$codetitles[0]'".')">'."\n".
-                  ' <option value="-1" />Select'."\n");
-            my @items = ();
-            my @longitems = ();
-            if ($idlist{$codetitles[0]} =~ /","/) {
-                @items = split/","/,$idlist{$codetitles[0]};
-            } else {
-                $items[0] = $idlist{$codetitles[0]};
-            }
-            if (defined($idlist_titles{$codetitles[0]})) {
-                if ($idlist_titles{$codetitles[0]} =~ /","/) {
-                    @longitems = split/","/,$idlist_titles{$codetitles[0]};
-                } else {
-                    $longitems[0] = $idlist_titles{$codetitles[0]};
-                }
-                for (my $i=0; $i<@longitems; $i++) {
-                    if ($longitems[$i] eq '') {
-                        $longitems[$i] = $items[$i];
+            $r->print('<b>'.&mt('Choose which course(s) to list.').'</b><br />'.
+                      &Apache::courseclassifier::build_instcode_selectors($numtitles,
+                       $lasttitle,\%cat_items,$codetitles,\%cat_titles,\%cat_order));
+        }
+        $r->print('<input type="hidden" name="coursenum" value="" />'."\n".
+                  '<input type="hidden" name="sortby" value="" />'."\n".
+                  '<input type="hidden" name="state" value="listing" />'."\n".
+                  '<input type="hidden" name="form.currcat_0" value="instcode::0" />'."\n".
+                  '<input type="submit" name="catalogfilter" value="'.
+                  &mt('Display courses').'" />'.
+                  '<input type="hidden" name="numtitles" value="'.$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">'.
+                  '<input type="hidden" name="catalog_maxdepth" value="'.$cat_maxdepth.'" />'.
+                  '<input type="hidden" name="showdom" value="'.$env{'form.showdom'}.'" />'.
+                  '<input type="hidden" name="currcat_0" value="instcode::0" />');
+        $r->print('<br />'.&mt('No official courses to display for [_1].',$domdesc).'</form>');
+    }
+    return $numtitles;
+}
+
+sub cat_header {
+    my ($r,$codedom,$js,$add_entries,$catlinks,$numtitles) = @_;
+    my $start_page =
+        &Apache::loncommon::start_page('Other',$js,
+                                       {
+                                         'add_entries' => $add_entries,
+                                         'no_inline_link'   => 1,});
+    $r->print($start_page);
+    my $brtext = 'Course listing';
+    if ($env{'form.currcat_0'} eq 'communities::0') {
+        $brtext = 'Community listing';
+    }
+    if ($env{'form.state'} eq 'listing') {
+        if ($numtitles > 0) {
+            &Apache::lonhtmlcommon::add_breadcrumb
+                ({href=>"/adm/coursecatalog",
+                  text=>"Course/Community Catalog"},
+                 {text=>$brtext});
+        } else {
+            &Apache::lonhtmlcommon::add_breadcrumb
+            ({text=>$brtext});
+        }
+    } else {
+        &Apache::lonhtmlcommon::add_breadcrumb
+        ({href=>"/adm/coursecatalog",
+          text=>"Course/Community Catalog"});
+    }
+    $r->print(&Apache::lonhtmlcommon::breadcrumbs('Course/Community Catalog'));
+    my $onchange;
+    unless ($env{'form.interface'} eq 'textual') {
+        $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,$onchange));
+    if (!$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><td>';
+    my $has_subcats;
+    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 {
+                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 {
+            $catlinks .= &main_category_selector(@cats);
+            if (($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).':'.&escape($container).':'.$shallower;
+                        my $selected = '';
+                        if ($item eq $env{'form.currcat_'.$shallower}) {
+                            $selected = ' selected="selected"';
+                        }
+                        $catlinks .= 
+                           '<option value="'.$item.'"'.$selected.'>'.$name.'</option>';
                     }
                 }
-            } else {
-                @longitems = @items;
+                $catlinks .= '</select>';
             }
-            for (my $i=0; $i<@items; $i++) {
-                $r->print(' <option value="'.$items[$i].'">'.$longitems[$i].'</option>');
+            unless ($i == $deeper) {
+                $catlinks .= $crumbsymbol;
+            } 
+        }
+        my ($cat,$container,$depth);
+        if ($env{'form.currcat_'.$currdepth} eq '') {
+            my $shallower = $currdepth - 1;
+            ($cat,$container,$depth) = map { &unescape($_); } split(/:/,$env{'form.currcat_'.$shallower});
+        } else {
+            ($cat,$container,$depth) = map { &unescape($_); } split(/:/,$env{'form.currcat_'.$currdepth});
+        }
+        my $deeperlevel = $depth +1;
+        if (ref($cats[$deeperlevel]{$cat}) eq 'ARRAY') {
+            $has_subcats = 1;
+            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>';
             }
-            $r->print('</select></td>');
-            for (my $i=1; $i<$numtitles; $i++) {
-                $r->print('<td>'.$codetitles[$i].'<br />'."\n".
-                 '<select name="'.$codetitles[$i].'" onChange="courseSet('."'$codetitles[$i]'".')">'."\n".
-                 '<option value="-1">&lt;-Pick '.$codetitles[$i-1].'</option>'."\n".
-                 '</select>'."\n".
-                 '</td>'
-                );
-            }
-            $r->print('</tr></table>');
-            if ($numtitles > 4) {
-                $r->print('<br /><br />'.$codetitles[$numtitles].'<br />'."\n".
-                    '<select name="'.$codetitles[$numtitles].
-                    '" onChange="courseSet('."'$codetitles[$numtitles]'".')">'."\n".
-                    '<option value="-1">&lt;-Pick '.$codetitles[$numtitles-1].
-                    '</option>'."\n".'</select>'."\n");
+            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";
             }
+            $catlinks .= '</select>'."\n";
+        } elsif ($cat ne 'instcode') {
+            $catlinks .= '&nbsp;'.&mt('(No subcategories)');
         }
-        $r->print('<br /><input type="hidden" name="state" value="listing" /><input type="hidden" name="sortby" value="" /><input type="submit" name="catalogfilter" value="'.&mt('Display courses').'" /></form>');
+    } else {
+        $selitem = 'currcat_0';
     }
-    if ($env{'form.state'} eq 'listing') {
-        $r->print('<br /><br >'.&print_course_listing($codedom));
+    $catlinks .= $currcat_str.'</td></tr></table></td>';
+    return ($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";
     }
-    $r->print(&Apache::loncommon::end_page());
+    return $maincatlinks;
+}
+
+sub get_depth_values {
+    my $currdepth = 0;
+    my $deeper = 0;
+    if ($env{'form.catalog_maxdepth'} ne '') {
+        $currdepth = $env{'form.catalog_maxdepth'};
+        if ($env{'form.currcat_'.$currdepth} eq '') {
+            $deeper = $currdepth;
+        } else {
+            $deeper = $currdepth + 1;
+        }
+    }
+    return ($currdepth,$deeper);
+}
+
+sub additional_filters {
+    my ($codedom,$has_subcats) = @_;
+    my $output = '<table>';
+    if (($env{'form.currcat_0'} ne 'instcode::0') && 
+        ($env{'form.currcat_0'} ne '') && ($has_subcats)) {
+        my $include_subcat_status;
+        if ($env{'form.withsubcats'}) {
+            $include_subcat_status = 'checked="checked" ';
+        }
+        my $counter = $env{'form.catalog_maxdepth'};
+        if ($counter > 0) {
+            if ($env{'form.state'} eq 'listing') {
+                $counter --;
+            } elsif ($env{'form.currcat_'.$counter} eq '') {
+                $counter --;
+            }
+        }
+        my ($catname) = split(/:/,$env{'form.currcat_'.$counter});
+        if ($catname ne '') {
+            $output .= '<tr><td><label>'.
+                       '<input type="checkbox" name="withsubcats" value="1" '.
+                       $include_subcat_status.'/>'.
+                       &mt('Include subcategories within "[_1]"',
+                           &unescape($catname)).'</label></td></tr>';
+        }
+    }
+    my $show_selfenroll_status;
+    if ($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" '.
+               $show_selfenroll_status.'/>'.$selfenroll_text.
+               '</label></td></tr>';
+    if (&user_is_dc($codedom)) {
+        my $showdetails_status;
+        if ($env{'form.showdetails'}) {
+            $showdetails_status = 'checked="checked" ';
+        }
+        my $showhidden_status;
+        if ($env{'form.showhidden'}) {
+             $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" '.
+                   $showdetails_status.'/>'.$details_text.
+                   '</label>'."\n".'</td></tr><tr><td>'.
+                   '<label><input type="checkbox" name="showhidden" value="1" '.
+                   $showhidden_status.'/>'.$hidden_text.
+                   '</label>'."\n".'</td></tr>';
+    }
+    $output .= '</table><br />';
+    return $output;
+}
+
+sub user_is_dc {
+    my ($codedom) = @_;
+    if (exists($env{'user.role.dc./'.$codedom.'/'})) {
+        my $livedc = 1;
+        my $now = time;
+        my ($start,$end)=split(/\./,$env{'user.role.dc./'.$codedom.'/'});
+        if ($start && $start>$now) { $livedc = 0; }
+        if ($end   && $end  <$now) { $livedc = 0; }
+        return $livedc;
+    }
+    return;
+}
+
+sub search_official_courselist {
+    my ($domain,$numtitles,$codetitles) = @_;
+    my $instcode = &Apache::courseclassifier::instcode_search_str($domain,$numtitles,$codetitles);
+    my $showhidden;
+    if (&user_is_dc($domain)) {
+        $showhidden = $env{'form.showhidden'};
+    }
+    my %courses = 
+        &Apache::lonnet::courseiddump($domain,'.',1,$instcode,'.','.',undef,undef,
+                                      'Course',1,$env{'form.showselfenroll'},undef,
+                                      $showhidden,'coursecatalog');
+    return %courses;
+}
+
+sub search_courselist {
+    my ($domain,$subcats) = @_;
+    my $cat_maxdepth = $env{'form.catalog_maxdepth'};
+    my $filter = $env{'form.currcat_'.$cat_maxdepth};
+    if (($filter eq '') && ($cat_maxdepth > 0)) {
+        my $shallower = $cat_maxdepth - 1;
+        $filter = $env{'form.currcat_'.$shallower};
+    }
+    my %courses;
+    my $filterstr;
+    if ($filter ne '') {
+        if ($env{'form.withsubcats'}) {
+            if (ref($subcats) eq 'HASH') {
+                if (ref($subcats->{$filter}) eq 'ARRAY') {
+                    $filterstr = join('&',@{$subcats->{$filter}});
+                    if ($filterstr ne '') {
+                        $filterstr = $filter.'&'.$filterstr;
+                    }
+                } else {
+                    $filterstr = $filter;
+                }
+            } else {
+                $filterstr = $filter;
+            }  
+        } else {
+            $filterstr = $filter; 
+        }
+        my ($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,
+                                          $typefilter,1,$env{'form.showselfenroll'},
+                                          $filterstr,$showhidden,'coursecatalog');
+    }
+    return %courses;
 }
 
 sub print_course_listing {
-    my ($domain) = @_;
+    my ($domain,$numtitles,$trails,$allitems,$subcats,$codetitles) = @_;
     my $output;
-    my $year = $env{'form.Year'};
-    my $sem = $env{'form.Semester'};
-    my $dept = $env{'form.Department'};
-    my $coursenum = $env{'form.Number'};
-    my $instcode;
-    if ($sem != -1) {
-        $instcode .= $sem; 
-    }
-    if ($year != -1) {
-        $instcode .= $year; 
-    }
-    if ($dept != -1) {
-        $instcode .= $dept;
-    }
-    if ($coursenum != -1) {
-        $instcode .= $coursenum; 
-    }
-    my %courses = &Apache::lonnet::courseiddump($domain,'.',1,$instcode,'.','.',
-                                                undef,undef,'Course');
-    if (keys(%courses) == 0) {
-        $output = &mt('No courses match the criteria you selected');
-        return $output;
+    my %courses;
+    my $knownuser = &user_is_known();
+    my $details = $env{'form.coursenum'};
+    if (&user_is_dc($domain)) {
+        if ($env{'form.showdetails'}) {
+            $details = 1;
+        }
     }
-    $output = &mt('<b>Note for students:</b> If STUINFO shows you as enrolled in a course, but there is no student role for the course in your LON-CAPA roles screen, please check the default access dates and/or auto-enrollment dates for the course listed below.  Your roles screen will only display currently accessible roles.<br /><br />');
-    $output .= &Apache::loncommon::start_data_table().
-              &Apache::loncommon::start_data_table_header_row().
-              '<th><a href="javascript:changeSort('."'code'".')">'.&mt('Code').'</a></th>'.
-              '<th>'.&mt('Sections').'</th>'.
-              '<th><a href="javascript:changeSort('."'title'".')">'.&mt('Title').'</a></th>'.
-              '<th><a href="javascript:changeSort('."'owner'".')">'.&mt('Owner').'</a></th>'.
-              '<th>'.&mt('Students').'</th>'.
-              '<th>'.&mt('Default Access Dates').'</th>'.
-              '<th>'.&mt('Auto-enrollment Dates').'</th>'.
-              &Apache::loncommon::end_data_table_header_row();
-    my %courseinfo;
-    foreach my $course (keys(%courses)) {
-        my $descr;
-        if ($courses{$course} =~ m/^([^:]*):/i) {
-            $descr = &unescape($1);
+    if ($env{'form.coursenum'} ne '') {
+        %courses = &Apache::lonnet::courseiddump($domain,'.',1,'.','.',
+                                                 $env{'form.coursenum'},
+                                                 undef,undef,'.',1);
+        if (keys(%courses) == 0) {
+            if ($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,$codetitles);
         } else {
-            $descr = &unescape($courses{$course});
+            %courses = &search_courselist($domain,$subcats);
         }
-        my $cleandesc=&HTML::Entities::encode($descr,'<>&"');
-        $cleandesc=~s/'/\\'/g;
-        my ($cdom,$cnum)=split(/\_/,$course);
-        my ($desc,$instcode,$owner,$ttype) = split/:/,$courses{$course};
-        $owner = &unescape($owner);
-        my ($ownername,$ownerdom);
-        if ($owner =~ /:/) {
-            ($ownername,$ownerdom) = split(/:/,$owner);
-        } else {
-            $ownername = $owner;
-            if ($owner ne '') {
-                $ownerdom = $cdom;
+        if (keys(%courses) == 0) {
+            if ($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 $output;
         }
-        my %ownernames;
-        if ($ownername ne '' && $ownerdom ne '') {
-            %ownernames = &Apache::loncommon::getnames($ownername,$ownerdom);
+        if (($knownuser) && (!$env{'form.showdetails'}) && (!&user_is_dc($domain))) {
+            $output = '<b>'.&mt('Note for students:').'</b> '
+                     .&mt('If you are officially enrolled in a course but the course is not listed in your LON-CAPA courses, click the "Show more details" link for the specific course and check the default access dates and/or automated enrollment settings.')
+                     .'<br /><br />';
         }
-        $courseinfo{$course}{'cdom'} = $cdom;
-        $courseinfo{$course}{'cnum'} = $cnum;
-        $courseinfo{$course}{'code'} = $instcode;
-        $courseinfo{$course}{'ownerlastname'} = $ownernames{'lastname'};
-        $courseinfo{$course}{'title'} = $cleandesc;
     }
+    my $now = time;
+    my %domconfig =
+        &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
+    $output .= &construct_data_table($knownuser,\%courses,$details,undef,$now,\%domconfig,$trails,$allitems);
+    $output .= "\n".'<form name="linklaunch" method="post" action="">'.
+               '<input type="hidden" name="backto" value="coursecatalog" />'.
+               '<input type="hidden" name="courseid" value="" />'.
+               &Apache::lonhtmlcommon::echo_form_input(['catalogfilter','courseid']).'</form>';
+    return $output;
+}
+
+sub construct_data_table {
+    my ($knownuser,$courses,$details,$usersections,$now,$domconfig,$trails,
+        $allitems) = @_;
+    my %sortname;
+    if (($details eq '') || ($env{'form.showdetails'})) {
+        $sortname{'Code'} = 'code';
+        $sortname{'Categories'} = 'cats';
+        $sortname{'Title'} = 'title';
+        $sortname{'Owner(s)'} = 'owner';
+    }
+    my $output = &Apache::loncommon::start_data_table().
+                 &Apache::loncommon::start_data_table_header_row();
+    my @coltitles = ('Count');
+    if ($env{'form.currcat_0'} eq 'instcode::0') {
+        push(@coltitles,'Code');
+    } else {
+        push(@coltitles,'Categories');
+    }
+    push(@coltitles,('Sections','Crosslisted','Title','Owner(s)'));
+    if (ref($usersections) eq 'HASH') {
+       $coltitles[1] = 'Your Section';
+    }
+    foreach my $item (@coltitles) {
+        $output .= '<th>';
+        if (defined($sortname{$item})) {
+            $output .= '<a href="javascript:changeSort('."'$sortname{$item}'".')">'.&mt($item).'</a>';
+        } elsif ($item eq 'Count') {
+            $output .= '&nbsp;&nbsp;';
+        } else {
+            $output .= &mt($item);
+        }
+        $output .= '</th>';
+    }
+    if ($knownuser) {
+        if ($details) {
+            if ($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>';
+        }
+    }
+    $output .= '<th>'.&mt('Self-enroll (if permitted)').'</th>';
+    &Apache::loncommon::end_data_table_header_row();
+    my %courseinfo = &build_courseinfo_hash($courses,$knownuser,$details,
+                                            $usersections);
     my %Sortby;
-    foreach my $course (sort(keys(%courses))) {
+    foreach my $course (sort(keys(%{$courses}))) {
         if ($env{'form.sortby'} eq 'code') {
             push(@{$Sortby{$courseinfo{$course}{'code'}}},$course);
+        } elsif ($env{'form.sortby'} eq 'cats') {
+            push(@{$Sortby{$courseinfo{$course}{'categories'}}},$course);
         } elsif ($env{'form.sortby'} eq 'owner') {
-            push(@{$Sortby{$courseinfo{$course}{'ownerlastname'}}},$course);
+            push(@{$Sortby{$courseinfo{$course}{'ownerlastnames'}}},$course);
         } else {
-            push(@{$Sortby{$courseinfo{$course}{'title'}}},$course);
+            my $clean_title = $courseinfo{$course}{'title'};
+            $clean_title =~ s/\W+//g;
+            if ($clean_title eq '') {
+                $clean_title = $courseinfo{$course}{'title'};
+            }
+            push(@{$Sortby{$clean_title}},$course);
         }
     }
     my @sorted_courses;
-    if (($env{'form.sortby'} eq 'code') || ($env{'form.sortby'} eq 'owner')) {
+    if (($env{'form.sortby'} eq 'code') || ($env{'form.sortby'} eq 'owner') ||
+        ($env{'form.sortby'} eq 'cats')) {
         @sorted_courses = sort(keys(%Sortby));
     } else {
         @sorted_courses = sort { lc($a) cmp lc($b) } (keys(%Sortby));
     }
+    my $count = 1;
     foreach my $item (@sorted_courses) {
         foreach my $course (@{$Sortby{$item}}) {
             $output.=&Apache::loncommon::start_data_table_row(); 
-            $output.=&courseinfo_row($courseinfo{$course});
+            $output.=&courseinfo_row($courseinfo{$course},$knownuser,$details,
+                                     \$count,$now,$course,$trails,$allitems);
             $output.=&Apache::loncommon::end_data_table_row();
         }
     }
@@ -266,91 +780,264 @@ sub print_course_listing {
     return $output;
 }
 
-sub courseinfo_row {
-    my ($info) = @_;
-    my ($cdom,$cnum,$title,$owner,$output);
-    if (ref($info) eq 'HASH') {
-        $cdom = $info->{'cdom'};
-        $cnum = $info->{'cnum'};
-        $title = $info->{'title'};
-        $owner = $info->{'ownerlastname'};
-    } else {
-        $output = '<td colspan="7">'.&mt('No information available').'</td>';
-        return $output;
+sub build_courseinfo_hash {
+    my ($courses,$knownuser,$details,$usersections) = @_;
+    my %courseinfo;
+    my $now = time;
+    foreach my $course (keys(%{$courses})) {
+        my $descr;
+        if (ref($courses->{$course}) eq 'HASH') {
+            $descr = $courses->{$course}{'description'}; 
+        }
+        my $cleandesc=&HTML::Entities::encode($descr,'<>&"');
+        $cleandesc=~s/'/\\'/g;
+        $cleandesc =~ s/^\s+//;
+        my ($cdom,$cnum)=split(/\_/,$course);
+        my ($instcode,$singleowner,$ttype,$selfenroll_types,
+            $selfenroll_start,$selfenroll_end,@owners,%ownernames,$categories);
+        if (ref($courses->{$course}) eq 'HASH') {
+            $descr = $courses->{$course}{'description'};
+            $instcode =  $courses->{$course}{'inst_code'};
+            $singleowner = $courses->{$course}{'owner'};
+            $ttype =  $courses->{$course}{'type'};
+            $selfenroll_types = $courses->{$course}{'selfenroll_types'};
+            $selfenroll_start = $courses->{$course}{'selfenroll_start_date'};
+            $selfenroll_end = $courses->{$course}{'selfenroll_end_date'};
+            $categories = $courses->{$course}{'categories'};
+            push(@owners,$singleowner);
+            if (ref($courses->{$course}{'co-owners'}) eq 'ARRAY') {
+                foreach my $item (@{$courses->{$course}{'co-owners'}}) {
+                    push(@owners,$item);
+                }
+            }
+        }
+        foreach my $owner (@owners) {
+            my ($ownername,$ownerdom); 
+            if ($owner =~ /:/) {
+                ($ownername,$ownerdom) = split(/:/,$owner);
+            } else {
+                $ownername = $owner;
+                if ($owner ne '') {
+                    $ownerdom = $cdom;
+                }
+            }
+            if ($ownername ne '' && $ownerdom ne '') {
+                my %namehash=&Apache::loncommon::getnames($ownername,$ownerdom);
+                $ownernames{$ownername.':'.$ownerdom} = \%namehash; 
+            }
+        }
+        $courseinfo{$course}{'cdom'} = $cdom;
+        $courseinfo{$course}{'cnum'} = $cnum;
+        $courseinfo{$course}{'code'} = $instcode;
+        my @lastnames;
+        foreach my $owner (keys(%ownernames)) {
+            if (ref($ownernames{$owner}) eq 'HASH') {
+                push(@lastnames,$ownernames{$owner}{'lastname'});
+            }
+        }
+        $courseinfo{$course}{'ownerlastnames'} = join(', ',sort(@lastnames));
+        $courseinfo{$course}{'title'} = $cleandesc;
+        $courseinfo{$course}{'owner'} = $singleowner;
+        $courseinfo{$course}{'selfenroll_types'} = $selfenroll_types;
+        $courseinfo{$course}{'selfenroll_start'} = $selfenroll_start;
+        $courseinfo{$course}{'selfenroll_end'} = $selfenroll_end;
+        $courseinfo{$course}{'categories'} = $categories;
+
+        my %coursehash = &Apache::lonnet::dump('environment',$cdom,$cnum);
+        my @classids;
+        my @crosslistings;
+        my ($seclist,$numsec) = 
+            &identify_sections($coursehash{'internal.sectionnums'});
+        if (ref($usersections) eq 'HASH') {
+            if (ref($usersections->{$course}) eq 'ARRAY') {
+                $seclist = join(', ',@{$usersections->{$course}});
+            }
+        }
+        $courseinfo{$course}{'seclist'} = $seclist;
+        my ($xlist_items,$numxlist) = 
+            &identify_sections($coursehash{'internal.crosslistings'});
+        my $showsyllabus = 1; # default is to include a syllabus link
+        if (defined($coursehash{'showsyllabus'})) {
+            $showsyllabus = $coursehash{'showsyllabus'};
+        }
+        $courseinfo{$course}{'showsyllabus'} = $showsyllabus;
+        if (((defined($env{'form.coursenum'}) && ($cnum eq $env{'form.coursenum'}))) ||
+            ($knownuser && ($details == 1))) {
+            $courseinfo{$course}{'counts'} =  &count_students($cdom,$cnum,$numsec);
+            $courseinfo{$course}{'autoenrollment'} =
+                &autoenroll_info(\%coursehash,$now,$seclist,$xlist_items,
+                                 $instcode,\@owners,$cdom,$cnum);
+
+            my $startaccess = '';
+            my $endaccess = '';
+            my $accessdates;
+            if ( defined($coursehash{'default_enrollment_start_date'}) ) {
+                $startaccess = &Apache::lonlocal::locallocaltime($coursehash{'default_enrollment_start_date'});
+            }
+            if ( defined($coursehash{'default_enrollment_end_date'}) ) {
+                $endaccess = &Apache::lonlocal::locallocaltime($coursehash{'default_enrollment_end_date'});
+                if ($coursehash{'default_enrollment_end_date'} == 0) {
+                    $endaccess = &mt('No ending date');
+                }
+            }
+            if ($startaccess) {
+                $accessdates .= '<i>'.&mt('From:[_1]','</i> '.$startaccess).'<br />';
+            }
+            if ($endaccess) {
+                $accessdates .= '<i>'.&mt('To:[_1]','</i> '.$endaccess).'<br />';
+            }
+            if (($selfenroll_types ne '') && 
+                ($selfenroll_end > 0 && $selfenroll_end > $now)) {
+                my ($selfenroll_start_access,$selfenroll_end_access);
+                if (($coursehash{'default_enrollment_start_date'} ne 
+                     $coursehash{'internal.selfenroll_start_access'}) ||
+                   ($coursehash{'default_enrollment_end_date'} ne 
+                    $coursehash{'internal.selfenroll_end_access'})) {
+                    if ( defined($coursehash{'internal.selfenroll_start_access'}) ) {
+                        $selfenroll_start_access = &Apache::lonlocal::locallocaltime($coursehash{'internal.selfenroll_start_access'});
+                    }
+                    if ( defined($coursehash{'default_enrollment_end_date'}) ) {
+                        $selfenroll_end_access = &Apache::lonlocal::locallocaltime($coursehash{'internal.selfenroll_end_access'});
+                        if ($coursehash{'internal.selfenroll_end_access'} == 0) {
+                            $selfenroll_end_access = &mt('No ending date');
+                        }
+                    }
+                    if ($selfenroll_start_access || $selfenroll_end_access) {
+                        $accessdates .= '<br/><br /><i>'.&mt('Self-enrollers:').'</i><br />';
+                        if ($selfenroll_start_access) {
+                            $accessdates .= '<i>'.&mt('From:[_1]','</i> '.$selfenroll_start_access).'<br />';
+                        }
+                        if ($selfenroll_end_access) {
+                            $accessdates .= '<i>'.&mt('To:[_1]','</i> '.$selfenroll_end_access).'<br />';
+                        }
+                    }
+                }
+            }
+            $courseinfo{$course}{'access'} = $accessdates;
+        }
+        if ($xlist_items eq '') {
+            $xlist_items = &mt('No');
+        }
+        $courseinfo{$course}{'xlist'} = $xlist_items;
     }
-    my %coursehash = &Apache::lonnet::dump('environment',$cdom,$cnum);
+    return %courseinfo;
+}
+
+sub count_students {
+    my ($cdom,$cnum,$numsec) = @_;
     my $classlist = &Apache::loncoursedata::get_classlist($cdom,$cnum);
+    my %student_count = (
+                           Active => 0,
+                           Future => 0,
+                           Expired => 0,
+                       );
     my %idx;
     $idx{'status'} = &Apache::loncoursedata::CL_STATUS();
-    my %status_title = &Apache::lonlocal::texthash (
+    my %status_title = &Apache::lonlocal::texthash(
                            Expired => 'Previous access',
                            Active => 'Current access',
                            Future => 'Future access',
                        );
-    my %student_count = (
-                           Expired => 0,
-                           Active => 0,
-                           Future => 0,
-                       );
-    while (my ($student,$data) = each %$classlist) {
+
+    while (my ($student,$data) = each(%$classlist)) {
         $student_count{$data->[$idx{'status'}]} ++;
     }
-    my $seclist = &identify_sections($coursehash{'internal.sectionnums'});
-    my $countslist;
-    my $startaccess = '';
-    my $endaccess = '';
-    my ($accessdates,$autoenrolldates);
-    if ( defined($coursehash{'default_enrollment_start_date'}) ) {
-        $startaccess = &Apache::lonlocal::locallocaltime($coursehash{'default_enrollment_start_date'});
-    }
-    if ( defined($coursehash{'default_enrollment_end_date'}) ) {
-        $endaccess = &Apache::lonlocal::locallocaltime($coursehash{'default_enrollment_end_date'});
-        if ($coursehash{'default_enrollment_end_date'} == 0) {
-            $endaccess = "No ending date";
-        }
+
+    my $countslist = &mt('[quant,_1,section:,sections:,No sections]',$numsec).'<br />';
+    foreach my $status ('Active','Future') {
+        $countslist .= '<span class="LC_nobreak">'.$status_title{$status}.': '.
+                       $student_count{$status}.'</span><br />';
     }
-    if ($startaccess) {
-        $accessdates .= &mt('From: ').$startaccess.'<br />';
+    return $countslist;
+}
+
+sub courseinfo_row {
+    my ($info,$knownuser,$details,$countref,$now,$course,$trails,$allitems) = @_;
+    my ($cdom,$cnum,$title,$ownerlast,$code,$owner,$seclist,$xlist_items,
+        $accessdates,$showsyllabus,$counts,$autoenrollment,$output,$categories);
+    if (ref($info) eq 'HASH') {
+        $cdom = $info->{'cdom'};
+        $cnum = $info->{'cnum'};
+        $title = $info->{'title'};
+        $ownerlast = $info->{'ownerlastnames'};
+        $code = $info->{'code'};
+        $owner = $info->{'owner'};
+        $seclist = $info->{'seclist'};
+        $xlist_items = $info->{'xlist'};
+        $accessdates = $info->{'access'};
+        $counts = $info->{'counts'};
+        $autoenrollment = $info->{'autoenrollment'};
+        $showsyllabus = $info->{'showsyllabus'};
+        $categories = $info->{'categories'};
+    } else {
+        $output = '<td colspan="8">'.&mt('No information available for [_1].',
+                                         $code).'</td>';
+        return $output;
     }
-    if ($endaccess) {
-        $accessdates .= &mt('To: ').$endaccess.'<br />';
+    $output .= '<td>'.$$countref.'</td>';
+    if ($env{'form.currcat_0'} eq 'instcode::0') {
+        $output .= '<td>'.$code.'</td>';
+    } else {
+        my ($categorylist,@cats);
+        if ($categories ne '') {
+            @cats = split('&',$categories);
+        }
+        if ((ref($trails) eq 'ARRAY') && (ref($allitems) eq 'HASH')) {
+            my @categories = map { $trails->[$allitems->{$_}]; } @cats;
+            $categorylist = join('<br />',@categories);
+        }
+        if ($categorylist eq '') {
+            $categorylist = '&nbsp;';
+        }
+        $output .= '<td>'.$categorylist.'</td>';
     }
-    if (!defined($coursehash{'internal.autoadds'}) || $coursehash{'internal.autoadds'} == 0) {
-        $autoenrolldates = &mt('Not enabled');
+    $output .= '<td>'.$seclist.'</td>'.
+               '<td>'.$xlist_items.'</td>'.
+               '<td>'.$title.'&nbsp;<font size="-2">';
+    if ($showsyllabus) {
+        $output .= '<a href="javascript:ToSyllabus('."'$cdom','$cnum'".')">'.&mt('Syllabus').'</a>';
     } else {
-        my ($autostart,$autoend);
-        if ( defined($coursehash{'internal.autostart'}) ) {
-            $autostart = &Apache::lonlocal::locallocaltime($coursehash{'internal.autostart'});
+        $output .= '&nbsp;';
+    }
+    $output .= '</font></td>'.
+               '<td>'.$ownerlast.'</td>';
+    if ($knownuser) {
+        if ($details) {
+            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>';
+        }
+    }
+    my $selfenroll;
+    if ($info->{'selfenroll_types'}) {
+        my $showstart = &Apache::lonlocal::locallocaltime($info->{'selfenroll_start'});
+        my $showend = &Apache::lonlocal::locallocaltime($info->{'selfenroll_end'});
+        if (($info->{'selfenroll_end'} > 0) && ($info->{'selfenroll_end'} > $now)) {
+            if (($info->{'selfenroll_start'} > 0) && ($info->{'selfenroll_start'} > $now)) {
+                $output .= '<td>'.&mt('Starts: [_1]','<span class="LC_cusr_emph">'.$showstart.'</span>').'<br />'.&mt('Ends: [_1]','<span class="LC_cusr_emph">'.$showend.'</span>').'</td>';
+            } else { 
+                $output .= '<td><a href="javascript:ToSelfenroll('."'$course'".')">'.&mt('Enroll in course').'</a><br />';
+                if ($info->{'selfenroll_end'} == 0) {
+                    $output .= &mt('Available permanently');
+                } elsif ($info->{'selfenroll_end'} > $now) {
+                    $output .= &mt('Self-enrollment ends: [_1]','<span class="LC_cusr_emph">'.$showend.'</span>');
+                }
+                $output .= '</td>';
+            }
+            $selfenroll = 1;
         }
-        if ( defined($coursehash{'internal.autoend'}) ) {
-            $autoend = &Apache::lonlocal::locallocaltime($coursehash{'internal.autoend'});
-            if ($coursehash{'internal.autoend'} == 0) {
-                $autoend = "No ending date";
-            }
-        }
-        if ($autostart) {
-            $autoenrolldates .= &mt('Starts: ').$startaccess.'<br />';
-        }
-        if ($autoend) {
-            $autoenrolldates .= &mt('Ends: ').$endaccess.'<br />';
-        }
-        if ($autoenrolldates eq '') {
-            $autoenrolldates = &mt('No start or end date set');
-        }
-    }
-    foreach my $status ('Active','Future','Expired') {
-        $countslist .= '<nobr>'.$status_title{$status}.': '.
-                       $student_count{$status}.'</nobr><br />';
-    }
-    $output = '<td>'.$coursehash{'internal.coursecode'}.'</td>'.
-              '<td>'.$seclist.'</td>'.
-              '<td>'.$title.'&nbsp;<font size="-2">'.
-               &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$cnum,$cdom).
-              '</font></td>'.
-              '<td>'.$owner.'</td>'.
-              '<td>'.$countslist.'</td>'.
-              '<td>'.$accessdates.'</td>'.
-              '<td>'.$autoenrolldates.'</td>'; 
+    }
+    if (!$selfenroll) {
+        $output .= '<td>&nbsp;</td>';
+    }
+    $$countref ++;
     return $output;
 }
 
@@ -358,7 +1045,7 @@ sub identify_sections {
     my ($seclist) = @_;
     my @secnums;
     if ($seclist =~ /,/) {
-        my @sections = split/,/,$seclist;
+        my @sections = split(/,/,$seclist);
         foreach my $sec (@sections) {
             $sec =~ s/:[^:]*$//;
             push(@secnums,$sec);
@@ -366,17 +1053,108 @@ sub identify_sections {
     } else {
         if ($seclist =~ m/^([^:]+):/) {
             my $sec = $1;
-            if (!grep/^$sec$/,@secnums) {
-                push (@secnums,$sec);
+            if (!grep(/^\Q$sec\E$/,@secnums)) {
+                push(@secnums,$sec);
             }
         }
     }
     @secnums = sort {$a <=> $b} @secnums;
-    my $seclist = join(', ',@secnums);
-    return $seclist;
+    $seclist = join(', ',@secnums);
+    my $numsec = @secnums;
+    return ($seclist,$numsec);
 }
 
+sub get_valid_classes {
+    my ($seclist,$xlist_items,$crscode,$owners,$cdom,$cnum) = @_;
+    my $response;
+    my %validations;
+    @{$validations{'sections'}} = ();
+    @{$validations{'xlists'}} = ();
+    my $totalitems = 0;
+    if ($seclist) {
+        foreach my $sec (split(/, /,$seclist)) {
+            my $class = $crscode.$sec;
+            if (&Apache::lonnet::auto_validate_class_sec($cdom,$cnum,$owners,
+							 $class) eq 'ok') {
+                if (!grep(/^\Q$sec$\E/,@{$validations{'sections'}})) {
+                    push(@{$validations{'sections'}},$sec);
+                    $totalitems ++;
+                }
+            }
+        }
+    }
+    if ($xlist_items) {
+        foreach my $item (split(/, /,$xlist_items)) {
+            if (&Apache::lonnet::auto_validate_class_sec($cdom,$cnum,$owners,
+							 $item) eq 'ok') {
+                if (!grep(/^\Q$item$\E/,@{$validations{'xlists'}})) {
+                    push(@{$validations{'xlists'}},$item);
+                    $totalitems ++;
+                }
+            }
+        }
+    }
+    if ($totalitems > 0) {
+        if (@{$validations{'sections'}}) {
+            $response = &mt('Sections:').' '.
+                        join(', ',@{$validations{'sections'}}).'<br />';
+        }
+        if (@{$validations{'xlists'}}) {
+            $response .= &mt('Courses:').' '.
+                        join(', ',@{$validations{'xlists'}});
+        }
+    }
+    return $response;
+}
 
-1;
+sub autoenroll_info {
+    my ($coursehash,$now,$seclist,$xlist_items,$code,$owners,$cdom,$cnum) = @_;
+    my $autoenrolldates = &mt('Not enabled');
+    if (defined($coursehash->{'internal.autoadds'}) && $coursehash->{'internal.autoadds'} == 1) {
+        my ($autostart,$autoend);
+        if ( defined($coursehash->{'internal.autostart'}) ) {
+            $autostart = &Apache::lonlocal::locallocaltime($coursehash->{'internal.autostart'});
+        }
+        if ( defined($coursehash->{'internal.autoend'}) ) {
+            $autoend = &Apache::lonlocal::locallocaltime($coursehash->{'internal.autoend'});
+        }
+        if ($coursehash->{'internal.autostart'} > $now) {
+            if ($coursehash->{'internal.autoend'} && $coursehash->{'internal.autoend'} < $now) {
+                $autoenrolldates = &mt('Not enabled');
+            } else {
+                my $valid_classes = 
+                   &get_valid_classes($seclist,$xlist_items,$code,
+                                      $owners,$cdom,$cnum);
+                if ($valid_classes ne '') {
+                    $autoenrolldates = &mt('Not enabled').'<br />'
+                                      .&mt('Starts: [_1]',$autostart)
+                                      .'<br />'.$valid_classes;
+                }
+            }
+        } else {
+            if ($coursehash->{'internal.autoend'} && $coursehash->{'internal.autoend'} < $now) {
+                $autoenrolldates = &mt('Not enabled').'<br />'
+                                  .&mt('Ended: [_1]',$autoend);
+            } else {
+                my $valid_classes = &get_valid_classes($seclist,$xlist_items,
+                                                       $code,$owners,$cdom,$cnum);
+                if ($valid_classes ne '') {
+                    $autoenrolldates = &mt('Currently enabled').'<br />'.
+                                       $valid_classes;
+                }
+            }
+        }
+    }
+    return $autoenrolldates;
+}
 
+sub user_is_known {
+    my $known = 0;
+    if ($env{'user.name'} ne '' && $env{'user.name'} ne 'public' 
+        && $env{'user.domain'} ne '' && $env{'user.domain'} ne 'public') {
+        $known = 1;
+    }
+    return $known;
+}
 
+1;