--- loncom/interface/lonmainmenu.pm	2009/12/07 18:37:11	1.8.4.1
+++ loncom/interface/lonmainmenu.pm	2021/06/07 06:05:49	1.13
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # displays the main menu
 #
-# $Id: lonmainmenu.pm,v 1.8.4.1 2009/12/07 18:37:11 raeburn Exp $
+# $Id: lonmainmenu.pm,v 1.13 2021/06/07 06:05:49 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -31,119 +31,66 @@
 # browser.interface - if this is 'textual', it overrides the second parameter
 # and goes to screen reader PDA mode
 #
-# environment.remote - if this is 'on', the routines controll the remote
-# control, otherwise they render the main window controls; ignored it
-# browser.interface is 'textual'
-#
 
 package Apache::lonmainmenu;
 
 use strict;
-use Apache::Constants qw(:common);
+use Apache::Constants qw(:common REDIRECT);
 use Apache::loncommon();
 use Apache::lonnet;
 use Apache::lonmenu();
 use Apache::lonlocal;
-use LONCAPA qw(:DEFAULT :match);
 
 sub handler {
     my $r = shift;
+
+    # Check for critical messages and redirect if present.  
+    my ($redirect,$url) = &Apache::loncommon::critical_redirect(300,'menu');
+    if ($redirect) {
+        &Apache::loncommon::content_type($r,'text/html');
+        $r->header_out(Location => $url);
+        return REDIRECT;
+    }
+
     &Apache::loncommon::no_cache($r);
     &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
     return OK if $r->header_only;
 
-    my $form;
-    if ($env{'environment.remote'} ne 'off') {
-	$form=&Apache::lonmenu::serverform();
-    }
-
-    my $custommenu = &Apache::loncommon::needs_gci_custom();
-    my ($script_tag,$switcher);
-    if ($env{'environment.remote'} ne 'off') {
-        my $utility=&Apache::lonmenu::utilityfunctions('/adm/menu');
-        $script_tag=(<<ENDSCRIPT);
-<script type="text/javascript">
-$utility
-</script>
-ENDSCRIPT
-    } elsif ($custommenu) {
-        my $switcher_js;
-        my %courses = &Apache::loncommon::existing_gcitest_courses();
-        my $numcourses = keys(%courses);
-        if ($numcourses > 0) {
-            $switcher = &gcitest_switcher(%courses);
-            my $current;
-            if ($env{'request.course.id'}) {
-                $current = 'cc./'.$env{'course.'.$env{'request.course.id'}.'.domain'}.
-                           '/'.$env{'course.'.$env{'request.course.id'}.'.num'};
-            }
-            $switcher_js = &gcitest_switcher_js($current,$numcourses);
-            $script_tag= <<"ENDSCRIPT";
-<script type="text/javascript">
-$switcher_js
-</script>
-ENDSCRIPT
-        }
-    }
 # ---- Print the screen, pretend to be in text mode to generate text-based menu
 # temporarily set interface to "faketextual" and remote to "off", which renders
 # the main menu
     $env{'browser.interface'}='faketextual';
-    $env{'environment.remote'}='off';
 
     $r->print(&Apache::loncommon::start_page( 'Main Menu',
-                                              $script_tag,
+                                               undef,
                                               {'bread_crumbs' => 1}));
-    if ($custommenu) {
-        $r->print(&Apache::lonmenu::inlinemenu('gcicustom',$switcher).$form);
-    } else {
-        $r->print(&Apache::lonmenu::inlinemenu().$form);
+#
+# If menu collection is in effect in course context, and Main Menu is 
+# not included, display message in place of usual menu items.
+#
+    if ($env{'request.course.id'}) {
+        my ($menucoll,$deeplinkmenu,$menuref) =
+            &Apache::loncommon::menucoll_in_effect();
+        if ($menucoll) {
+            if (ref($menuref) eq 'HASH') {
+                if ($menuref->{'main'} eq 'n') {
+                    $r->print('<h3>'.&mt('Main Menu unavailable').'</h3>');
+                    unless ($deeplinkmenu) {
+                        my $crstype = &Apache::loncommon::course_type();
+                        $r->print('<p>'.&mt("Main Menu page is unavailable in this $crstype").'</p>');
+                    }
+                    $r->print(&Apache::loncommon::end_page());
+                    return OK;
+                }
+            }
+        }
     }
+    $r->print(&Apache::lonmenu::inlinemenu());
     $r->print(&Apache::loncommon::end_page());
     return OK;
 }
 
-sub gcitest_switcher {
-    my (%courses) = @_;
-    my $output;
-    my %Sortby;
-    foreach my $course (sort(keys(%courses))) {
-        next unless (ref($courses{$course}) eq 'HASH');
-        my $clean_title = $courses{$course}{'description'};
-        $clean_title =~ s/\W+//g;
-        if ($clean_title eq '') {
-            $clean_title = $courseinfo{$course}{'description'};
-        }
-        push(@{$Sortby{$clean_title}},$course);
-    }
-    my @sorted_courses = sort { lc($a) cmp lc($b) } (keys(%Sortby));
-    my $default;
-    if (@sorted_courses > 1) {
-        if (($env{'request.course.id'}) && ($courses{$env{'request.course.id'}})) {
-            $default = &mt('Switch concept test ...');
-        } else {
-            $default = &mt('Select a concept test ...');
-        }
-    } else {
-        unless (($env{'request.course.id'}) && ($courses{$env{'request.course.id'}})) {
-            $default = &mt('Select concept test ...');
-        }
-    }
-    if ($default) {
-        $output = '<form name="pickrole" action="/adm/roles" method="post">'.
-                  '<select name="newrole" method="post" onchange="javascript:courseswitcher();">'.
-                  '<option value="" selected="selected">'.$default.'</option>';
-        foreach my $item (@sorted_courses) {
-            foreach my $course (@{$Sortby{$item}}) {
-                my ($cdom,$cnum) = split('_',$course);
-                $output .= '<option value="cc./'.$cdom.'/'.$cnum.'">'.$item.'</option>';
-            }
-        }
-        $output .= '</select><input type="hidden" name="selectrole" value="" /></form>';
-    }
-    return $output;
-}
 
 1;
 __END__