--- loncom/interface/loncommon.pm	2020/09/08 04:19:48	1.1075.2.141.2.6
+++ loncom/interface/loncommon.pm	2024/07/04 23:00:26	1.1075.2.167
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1075.2.141.2.6 2020/09/08 04:19:48 raeburn Exp $
+# $Id: loncommon.pm,v 1.1075.2.167 2024/07/04 23:00:26 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -61,7 +61,6 @@ use POSIX qw(strftime mktime);
 use Apache::lonmenu();
 use Apache::lonenc();
 use Apache::lonlocal;
-use Apache::lonnet();
 use HTML::Entities;
 use Apache::lonhtmlcommon();
 use Apache::loncoursedata();
@@ -83,8 +82,6 @@ use Crypt::DES;
 use DynaLoader; # for Crypt::DES version
 use File::Copy();
 use File::Path();
-use String::CRC32();
-use Short::URL();
 
 # ---------------------------------------------- Designs
 use vars qw(%defaultdesign);
@@ -1380,7 +1377,7 @@ sub help_open_menu {
 }
 
 sub top_nav_help {
-    my ($text) = @_;
+    my ($text,$linkattr) = @_;
     $text = &mt($text);
     my $stay_on_page;
     unless ($env{'environment.remote'} eq 'on') {
@@ -1396,7 +1393,7 @@ sub top_nav_help {
     if ($link) {
         return <<"END";
 $banner_link
-<a href="$link" title="$title">$text</a>
+<a href="$link" title="$title" $linkattr>$text</a>
 END
     } else {
         return '&nbsp;'.$text.'&nbsp;';
@@ -3129,14 +3126,11 @@ sub authform_filesystem {
                     $fsyscheck.' onchange="'.$jscall.'" onclick="'.
                     $jscall.'"'.$disabled.' />';
     }
-    $autharg = '<input type="text" size="10" name="fsysarg" value=""'.
+    $autharg = '<input type="password" size="10" name="fsysarg" value=""'.
                ' onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt
         ('[_1] Filesystem Authenticated (with initial password [_2])',
-         '<label><input type="radio" name="login" value="fsys" '.
-         $fsyscheck.'onchange="'.$jscall.'" onclick="'.$jscall.'"'.$disabled.' />',
-         '</label><input type="password" size="10" name="fsysarg" value="" '.
-                  'onchange="'.$jscall.'"'.$disabled.' />');
+         '<label>'.$authtype,'</label>'.$autharg);
     return $result;
 }
 
@@ -3675,6 +3669,30 @@ sub syllabuswrapper {
 
 # -----------------------------------------------------------------------------
 
+sub aboutme_on {
+    my ($uname,$udom)=@_;
+    unless ($uname) { $uname=$env{'user.name'}; }
+    unless ($udom)  { $udom=$env{'user.domain'}; }
+    return if ($udom eq 'public' && $uname eq 'public');
+    my $hashkey=$uname.':'.$udom;
+    my ($aboutme,$cached)=&Apache::lonnet::is_cached_new('aboutme',$hashkey);
+    if ($cached) {
+        return $aboutme;
+    }
+    $aboutme = &Apache::lonnet::usertools_access($uname,$udom,'aboutme');
+    &Apache::lonnet::do_cache_new('aboutme',$hashkey,$aboutme,3600);
+    return $aboutme;
+}
+
+sub devalidate_aboutme_cache {
+    my ($uname,$udom)=@_;
+    if (!$udom)  { $udom =$env{'user.domain'}; }
+    if (!$uname) { $uname=$env{'user.name'};   }
+    return if ($udom eq 'public' && $uname eq 'public');
+    my $id=$uname.':'.$udom;
+    &Apache::lonnet::devalidate_cache_new('aboutme',$id);
+}
+
 sub track_student_link {
     my ($linktext,$sname,$sdom,$target,$start,$only_body) = @_;
     my $link ="/adm/trackstudent?";
@@ -4425,6 +4443,59 @@ sub get_student_view_with_retries {
     }
 }
 
+sub css_links {
+    my ($currsymb,$level) = @_;
+    my ($links,@symbs,%cssrefs,%httpref);
+    if ($level eq 'map') {
+        my $navmap = Apache::lonnavmaps::navmap->new();
+        if (ref($navmap)) {
+            my ($map,undef,$url)=&Apache::lonnet::decode_symb($currsymb);
+            my @resources = $navmap->retrieveResources($map,sub { $_[0]->is_problem() },0,0);
+            foreach my $res (@resources) {
+                if (ref($res) && $res->symb()) {
+                    push(@symbs,$res->symb());
+                }
+            }
+        }
+    } else {
+        @symbs = ($currsymb);
+    }
+    foreach my $symb (@symbs) {
+        my $css_href = &Apache::lonnet::EXT('resource.0.cssfile',$symb);
+        if ($css_href =~ /\S/) {
+            unless ($css_href =~ m{https?://}) {
+                my $url = (&Apache::lonnet::decode_symb($symb))[-1];
+                my $proburl =  &Apache::lonnet::clutter($url);
+                my ($probdir) = ($proburl =~ m{(.+)/[^/]+$});
+                unless ($css_href =~ m{^/}) {
+                    $css_href = &Apache::lonnet::hreflocation($probdir,$css_href);
+                }
+                if ($css_href =~ m{^/(res|uploaded)/}) {
+                    unless (($httpref{'httpref.'.$css_href}) ||
+                            (&Apache::lonnet::is_on_map($css_href))) {
+                        my $thisurl = $proburl;
+                        if ($env{'httpref.'.$proburl}) {
+                            $thisurl = $env{'httpref.'.$proburl};
+                        }
+                        $httpref{'httpref.'.$css_href} = $thisurl;
+                    }
+                }
+            }
+            $cssrefs{$css_href} = 1;
+        }
+    }
+    if (keys(%httpref)) {
+        &Apache::lonnet::appenv(\%httpref);
+    }
+    if (keys(%cssrefs)) {
+        foreach my $css_href (keys(%cssrefs)) {
+            next unless ($css_href =~ m{^(/res/|/uploaded/|https?://)});
+            $links .= '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />'."\n";
+        }
+    }
+    return $links;
+}
+
 =pod
 
 =item * &get_student_answers() 
@@ -4680,13 +4751,96 @@ sub findallcourses {
 ###############################################
 
 sub blockcheck {
-    my ($setters,$activity,$uname,$udom,$url,$is_course) = @_;
+    my ($setters,$activity,$clientip,$uname,$udom,$url,$is_course,$symb,$caller) = @_;
 
+    unless ($activity eq 'docs') {
+        my ($has_evb,$check_ipaccess);
+        my $dom = $env{'user.domain'};
+        if ($env{'request.course.id'}) {
+            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+            my $checkrole = "cm./$cdom/$cnum";
+            my $sec = $env{'request.course.sec'};
+            if ($sec ne '') {
+                $checkrole .= "/$sec";
+            }
+            if ((&Apache::lonnet::allowed('evb',undef,undef,$checkrole)) &&
+                ($env{'request.role'} !~ /^st/)) {
+                $has_evb = 1;
+            }
+            unless ($has_evb) {
+                if (($activity eq 'printout') || ($activity eq 'grades') || ($activity eq 'search') ||
+                    ($activity eq 'boards') || ($activity eq 'groups') || ($activity eq 'chat')) {
+                    if ($udom eq $cdom) {
+                        $check_ipaccess = 1;
+                    }
+                }
+            }
+        } elsif (($activity eq 'com') || ($activity eq 'port') || ($activity eq 'blogs') ||
+                ($activity eq 'about') || ($activity eq 'wishlist') || ($activity eq 'passwd')) {
+            my $checkrole;
+            if ($env{'request.role.domain'} eq '') {
+                $checkrole = "cm./$env{'user.domain'}/";
+            } else {
+                $checkrole = "cm./$env{'request.role.domain'}/";
+            }
+            if (($checkrole) && (&Apache::lonnet::allowed('evb',undef,undef,$checkrole))) {
+                $has_evb = 1;
+            }
+        }
+        unless ($has_evb || $check_ipaccess) {
+            my @machinedoms = &Apache::lonnet::current_machine_domains();
+            if (($dom eq 'public') && ($activity eq 'port')) {
+                $dom = $udom;
+            }
+            if (($dom ne '') && (grep(/^\Q$dom\E$/,@machinedoms))) {
+                $check_ipaccess = 1;
+            } else {
+                my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};
+                my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
+                my $prim = &Apache::lonnet::domain($dom,'primary');
+                my $intdom = &Apache::lonnet::internet_dom($prim);
+                if (($intdom ne '') && (ref($internet_names) eq 'ARRAY')) {
+                    if (grep(/^\Q$intdom\E$/,@{$internet_names})) {
+                        $check_ipaccess = 1;
+                    }
+                }
+            }
+        }
+        if ($check_ipaccess) {
+            my ($ipaccessref,$cached)=&Apache::lonnet::is_cached_new('ipaccess',$dom);
+            unless (defined($cached)) {
+                my %domconfig =
+                    &Apache::lonnet::get_dom('configuration',['ipaccess'],$dom);
+                $ipaccessref = &Apache::lonnet::do_cache_new('ipaccess',$dom,$domconfig{'ipaccess'},1800);
+            }
+            if ((ref($ipaccessref) eq 'HASH') && ($clientip)) {
+                foreach my $id (keys(%{$ipaccessref})) {
+                    if (ref($ipaccessref->{$id}) eq 'HASH') {
+                        my $range = $ipaccessref->{$id}->{'ip'};
+                        if ($range) {
+                            if (&Apache::lonnet::ip_match($clientip,$range)) {
+                                if (ref($ipaccessref->{$id}->{'commblocks'}) eq 'HASH') {
+                                    if ($ipaccessref->{$id}->{'commblocks'}->{$activity} eq 'on') {
+                                        return ('','','',$id,$dom);
+                                        last;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        if (($activity eq 'wishlist') || ($activity eq 'annotate')) {
+            return ();
+        }
+    }
     if (defined($udom) && defined($uname)) {
         # If uname and udom are for a course, check for blocks in the course.
         if (($is_course) || (&Apache::lonnet::is_course($udom,$uname))) {
             my ($startblock,$endblock,$triggerblock) =
-                &get_blocks($setters,$activity,$udom,$uname,$url);
+                &get_blocks($setters,$activity,$udom,$uname,$url,$symb,$caller);
             return ($startblock,$endblock,$triggerblock);
         }
     } else {
@@ -4697,14 +4851,16 @@ sub blockcheck {
     my $startblock = 0;
     my $endblock = 0;
     my $triggerblock = '';
-    my %live_courses = &findallcourses(undef,$uname,$udom);
+    my %live_courses;
+    unless (($activity eq 'wishlist') || ($activity eq 'annotate')) {
+        %live_courses = &findallcourses(undef,$uname,$udom);
+    }
 
     # If uname is for a user, and activity is course-specific, i.e.,
     # boards, chat or groups, check for blocking in current course only.
 
     if (($activity eq 'boards' || $activity eq 'chat' ||
-         $activity eq 'groups' || $activity eq 'printout' ||
-         $activity eq 'reinit' || $activity eq 'alert') &&
+         $activity eq 'groups' || $activity eq 'printout') &&
         ($env{'request.course.id'})) {
         foreach my $key (keys(%live_courses)) {
             if ($key ne $env{'request.course.id'}) {
@@ -4814,7 +4970,7 @@ sub blockcheck {
         # of specified user, unless user has 'evb' privilege.
         
         my ($start,$end,$trigger) = 
-            &get_blocks($setters,$activity,$cdom,$cnum,$url);
+            &get_blocks($setters,$activity,$cdom,$cnum,$url,$symb,$caller);
         if (($start != 0) && 
             (($startblock == 0) || ($startblock > $start))) {
             $startblock = $start;
@@ -4834,7 +4990,7 @@ sub blockcheck {
 }
 
 sub get_blocks {
-    my ($setters,$activity,$cdom,$cnum,$url) = @_;
+    my ($setters,$activity,$cdom,$cnum,$url,$symb,$caller) = @_;
     my $startblock = 0;
     my $endblock = 0;
     my $triggerblock = '';
@@ -4847,7 +5003,13 @@ sub get_blocks {
     my $now = time;
     my %commblocks = &Apache::lonnet::get_comm_blocks($cdom,$cnum);
     if ($activity eq 'docs') {
-        @blockers = &Apache::lonnet::has_comm_blocking('bre',undef,$url,\%commblocks);
+        my ($blocked,$nosymbcache,$noenccheck);
+        if (($caller eq 'blockedaccess') || ($caller eq 'blockingstatus')) {
+            $blocked = 1;
+            $nosymbcache = 1;
+            $noenccheck = 1;
+        }
+        @blockers = &Apache::lonnet::has_comm_blocking('bre',$symb,$url,$nosymbcache,$noenccheck,$blocked,\%commblocks);
         foreach my $block (@blockers) {
             if ($block =~ /^firstaccess____(.+)$/) {
                 my $item = $1;
@@ -4899,13 +5061,19 @@ sub get_blocks {
                 my $end = $start + $env{'course.'.$cdom.'_'.$cnum.'.timerinterval.'.$timersymb}; 
                 if ($start && $end) {
                     if (($start <= time) && ($end >= time)) {
-                        unless (grep(/^\Q$block\E$/,@blockers)) {
-                            push(@blockers,$block);
-                            $triggered{$block} = {
-                                                   start => $start,
-                                                   end   => $end,
-                                                   type  => $type,
-                                                 };
+                        if (ref($commblocks{$block}) eq 'HASH') {
+                            if (ref($commblocks{$block}{'blocks'}) eq 'HASH') {
+                                if ($commblocks{$block}{'blocks'}{$activity} eq 'on') {
+                                    unless(grep(/^\Q$block\E$/,@blockers)) {
+                                        push(@blockers,$block);
+                                        $triggered{$block} = {
+                                                               start => $start,
+                                                               end   => $end,
+                                                               type  => $type,
+                                                             };
+                                    }
+                                }
+                            }
                         }
                     }
                 }
@@ -4969,14 +5137,17 @@ sub parse_block_record {
 }
 
 sub blocking_status {
-    my ($activity,$uname,$udom,$url,$is_course) = @_;
+    my ($activity,$clientip,$uname,$udom,$url,$is_course,$symb,$caller) = @_;
     my %setters;
 
 # check for active blocking
-    my ($startblock,$endblock,$triggerblock) = 
-        &blockcheck(\%setters,$activity,$uname,$udom,$url,$is_course);
+    if ($clientip eq '') {
+        $clientip = &Apache::lonnet::get_requestor_ip();
+    }
+    my ($startblock,$endblock,$triggerblock,$by_ip,$blockdom) = 
+        &blockcheck(\%setters,$activity,$clientip,$uname,$udom,$url,$is_course,$symb,$caller);
     my $blocked = 0;
-    if ($startblock && $endblock) {
+    if (($startblock && $endblock) || ($by_ip)) {
         $blocked = 1;
     }
 
@@ -4985,12 +5156,17 @@ sub blocking_status {
 
 # build a link to a popup window containing the details
     my $querystring  = "?activity=$activity";
-# $uname and $udom decide whose portfolio the user is trying to look at
-    if (($activity eq 'port') || ($activity eq 'passwd')) {
+# $uname and $udom decide whose portfolio (or information page) the user is trying to look at
+    if (($activity eq 'port') || ($activity eq 'about') || ($activity eq 'passwd')) {
         $querystring .= "&amp;udom=$udom"      if ($udom =~ /^$match_domain$/);
         $querystring .= "&amp;uname=$uname"    if ($uname =~ /^$match_username$/);
     } elsif ($activity eq 'docs') {
-        $querystring .= '&amp;url='.&HTML::Entities::encode($url,'&"');
+        my $showurl = &Apache::lonenc::check_encrypt($url);
+        $querystring .= '&amp;url='.&HTML::Entities::encode($showurl,'\'&"<>');
+        if ($symb) {
+            my $showsymb = &Apache::lonenc::check_encrypt($symb);
+            $querystring .= '&amp;symb='.&HTML::Entities::encode($showsymb,'\'&"<>');
+        }
     }
 
     my $output .= <<'END_MYBLOCK';
@@ -5017,10 +5193,14 @@ END_MYBLOCK
         $text = &mt('Password Changing Blocked');
     } elsif ($activity eq 'grades') {
         $text = &mt('Gradebook Blocked');
-    } elsif ($activity eq 'alert') {
-        $text = &mt('Checking Critical Messages Blocked');
-    } elsif ($activity eq 'reinit') {
-        $text = &mt('Checking Course Update Blocked');
+    } elsif ($activity eq 'search') {
+        $text = &mt('Search Blocked');
+    } elsif ($activity eq 'about') {
+        $text = &mt('Access to User Information Pages Blocked');
+    } elsif ($activity eq 'wishlist') {
+        $text = &mt('Access to Stored Links Blocked');
+    } elsif ($activity eq 'annotate') {
+        $text = &mt('Access to Annotations Blocked');
     }
     $output .= <<"END_BLOCK";
 <div class='$class'>
@@ -5044,43 +5224,24 @@ sub check_ip_acc {
     if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) {
         return 1;
     }
-    my ($ip,$allowed);
+    my $allowed=0;
+    my $ip;
     if (($ENV{'REMOTE_ADDR'} eq '127.0.0.1') ||
         ($ENV{'REMOTE_ADDR'} eq &Apache::lonnet::get_host_ip($Apache::lonnet::perlvar{'lonHostID'}))) {
         $ip = $env{'request.host'} || $ENV{'REMOTE_ADDR'} || $clientip;
     } else {
-        $ip = $ENV{'REMOTE_ADDR'} || $env{'request.host'} || $clientip;
+        my $remote_ip = &Apache::lonnet::get_requestor_ip();
+        $ip = $remote_ip || $env{'request.host'} || $clientip;
     }
 
     my $name;
-    my %access = (
-                     allowfrom => 1,
-                     denyfrom  => 0,
-                 );
-    my @allows;
-    my @denies;
-    foreach my $item (split(',',$acc)) {
-        $item =~ s/^\s*//;
-        $item =~ s/\s*$//;
-        if ($item =~ /^\!(.+)$/) {
-            push(@denies,$1);
-        } else {
-            push(@allows,$item);
-        }
-    }
-    my $numdenies = scalar(@denies);
-    my $numallows = scalar(@allows);
-    my $count = 0;
-    foreach my $pattern (@denies,@allows) {
-        $count ++;
-        my $acctype = 'allowfrom';
-        if ($count <= $numdenies) {
-            $acctype = 'denyfrom';
-        }
+    foreach my $pattern (split(',',$acc)) {
+        $pattern =~ s/^\s*//;
+        $pattern =~ s/\s*$//;
         if ($pattern =~ /\*$/) {
             #35.8.*
             $pattern=~s/\*//;
-            if ($ip =~ /^\Q$pattern\E/) { $allowed=$access{$acctype}; }
+            if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
         } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
             #35.8.3.[34-56]
             my $low=$2;
@@ -5088,7 +5249,7 @@ sub check_ip_acc {
             $pattern=$1;
             if ($ip =~ /^\Q$pattern\E/) {
                 my $last=(split(/\./,$ip))[3];
-                if ($last <=$high && $last >=$low) { $allowed=$access{$acctype}; }
+                if ($last <=$high && $last >=$low) { $allowed=1; }
             }
         } elsif ($pattern =~ /^\*/) {
             #*.msu.edu
@@ -5098,10 +5259,10 @@ sub check_ip_acc {
                 my $netaddr=inet_aton($ip);
                 ($name)=gethostbyaddr($netaddr,AF_INET);
             }
-            if ($name =~ /\Q$pattern\E$/i) { $allowed=$access{$acctype}; }
+            if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
         } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
             #127.0.0.1
-            if ($ip =~ /^\Q$pattern\E/) { $allowed=$access{$acctype}; }
+            if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
         } else {
             #some.name.com
             if (!defined($name)) {
@@ -5109,16 +5270,9 @@ sub check_ip_acc {
                 my $netaddr=inet_aton($ip);
                 ($name)=gethostbyaddr($netaddr,AF_INET);
             }
-            if ($name =~ /\Q$pattern\E$/i) { $allowed=$access{$acctype}; }
-        }
-        if ($allowed =~ /^(0|1)$/) { last; }
-    }
-    if ($allowed eq '') {
-        if ($numdenies && !$numallows) {
-            $allowed = 1;
-        } else {
-            $allowed = 0;
+            if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
         }
+        if ($allowed) { last; }
     }
     return $allowed;
 }
@@ -5199,6 +5353,17 @@ sub get_domainconf {
                                     }
                                 }
                             }
+                        } elsif ($key eq 'saml') {
+                            if (ref($domconfig{'login'}{$key}) eq 'HASH') {
+                                foreach my $host (keys(%{$domconfig{'login'}{$key}})) {
+                                    if (ref($domconfig{'login'}{$key}{$host}) eq 'HASH') {
+                                        $designhash{$udom.'.login.'.$key.'_'.$host} = 1;
+                                        foreach my $item ('text','img','alt','url','title','notsso') {
+                                            $designhash{$udom.'.login.'.$key.'_'.$item.'_'.$host} = $domconfig{'login'}{$key}{$host}{$item};
+                                        }
+                                    }
+                                }
+                            }
                         } else {
                             foreach my $img (keys(%{$domconfig{'login'}{$key}})) {
                                 $designhash{$udom.'.login.'.$key.'_'.$img} = 
@@ -5303,8 +5468,12 @@ sub domainlogo {
 		&Apache::lonnet::repcopy($local_name);
 	    }
 	   $imgsrc = &lonhttpdurl($imgsrc);
-        } 
-        return '<img src="'.$imgsrc.'" alt="'.$domain.'" />';
+        }
+        my $alttext = $domain;
+        if ($designhash{$domain.'.login.alttext_domlogo'} ne '') {
+            $alttext = $designhash{$domain.'.login.alttext_domlogo'};
+        }
+        return '<img src="'.$imgsrc.'" alt="'.$alttext.'" id="lclogindomlogo" />';
     } elsif (defined(&Apache::lonnet::domain($domain,'description'))) {
         return &Apache::lonnet::domain($domain,'description');
     } else {
@@ -5568,12 +5737,24 @@ sub bodytag {
     if ($realm) {
         $realm = '/'.$realm;
     }
-    if ($role  eq 'ca') {
+    if ($role eq 'ca') {
         my ($rdom,$rname) = ($realm =~ m{^/($match_domain)/($match_username)$});
         $realm = &plainname($rname,$rdom);
     } 
 # realm
+    my ($cid,$sec);
     if ($env{'request.course.id'}) {
+        $cid = $env{'request.course.id'};
+        if ($env{'request.course.sec'}) {
+            $sec = $env{'request.course.sec'};
+        }
+    } elsif ($realm =~ m{^/($match_domain)/($match_courseid)(?:|/(\w+))$}) {
+        if (&Apache::lonnet::is_course($1,$2)) {
+            $cid = $1.'_'.$2;
+            $sec = $3;
+        }
+    }
+    if ($cid) {
         if ($env{'request.role'} !~ /^cr/) {
             $role = &Apache::lonnet::plaintext($role,&course_type());
         } elsif ($role =~ m{^cr/($match_domain)/\1-domainconfig/(\w+)$}) {
@@ -5585,10 +5766,10 @@ sub bodytag {
         } else {
             $role = (split(/\//,$role,4))[-1];
         }
-        if ($env{'request.course.sec'}) {
-            $role .= ('&nbsp;'x2).'-&nbsp;'.&mt('section:').'&nbsp;'.$env{'request.course.sec'};
+        if ($sec) {
+            $role .= ('&nbsp;'x2).'-&nbsp;'.&mt('section:').'&nbsp;'.$sec;
         }   
-	$realm = $env{'course.'.$env{'request.course.id'}.'.description'};
+	$realm = $env{'course.'.$cid.'.description'};
     } else {
         $role = &Apache::lonnet::plaintext($role);
     }
@@ -5610,15 +5791,13 @@ sub bodytag {
     if ($public) {
 	undef($role);
     }
-    
+
     my $titleinfo = '<h1>'.$title.'</h1>';
     #
     # Extra info if you are the DC
     my $dc_info = '';
-    if ($env{'user.adv'} && exists($env{'user.role.dc./'.
-                        $env{'course.'.$env{'request.course.id'}.
-                                 '.domain'}.'/'})) {
-        my $cid = $env{'request.course.id'};
+    if (($env{'user.adv'}) && ($env{'request.course.id'}) &&
+        (exists($env{'user.role.dc./'.$env{'course.'.$cid.'.domain'}.'/'}))) {
         $dc_info = $cid.' '.$env{'course.'.$cid.'.internal.coursecode'};
         $dc_info =~ s/\s+$//;
     }
@@ -5650,11 +5829,11 @@ sub bodytag {
         $bodytag .= Apache::lonhtmlcommon::scripttag(
             Apache::lonmenu::utilityfunctions($httphost), 'start');
 
-        my ($left,$right) = Apache::lonmenu::primary_menu();
+        my ($left,$right) = Apache::lonmenu::primary_menu($args->{'links_disabled'});
 
         if ($env{'request.noversionuri'} =~ m{^/res/adm/pages/}) {
             if ($dc_info) {
-                 $dc_info = qq|<span class="LC_cusr_subheading">$dc_info</span>|;
+                $dc_info = qq|<span class="LC_cusr_subheading">$dc_info</span>|;
             }
             $bodytag .= qq|<div id="LC_nav_bar">$left $role<br />
                            <em>$realm</em> $dc_info</div>|;
@@ -5678,7 +5857,7 @@ sub bodytag {
         }
         #don't show menus for public users
         if (!$public){
-            $bodytag .= Apache::lonmenu::secondary_menu($httphost);
+            $bodytag .= Apache::lonmenu::secondary_menu($httphost,$args->{'links_disabled'});
             $bodytag .= Apache::lonmenu::serverform();
             $bodytag .= Apache::lonhtmlcommon::scripttag('', 'end');
             if ($env{'request.state'} eq 'construct') {
@@ -5687,8 +5866,8 @@ sub bodytag {
             } elsif ($forcereg) {
                 $bodytag .= &Apache::lonmenu::innerregister($forcereg,undef,
                                                             $args->{'group'},
-                                                            $args->{'hide_buttons',
-                                                            $hostname});
+                                                            $args->{'hide_buttons'},
+                                                            $hostname);
             } else {
                 my $forbodytag;
                 &Apache::lonmenu::prepare_functions($env{'request.noversionuri'},
@@ -5837,6 +6016,9 @@ sub endbodytag {
 	        $endbodytag;
         }
     }
+    if ((ref($args) eq 'HASH') && ($args->{'dashjs'})) {
+        $endbodytag = &Apache::lonhtmlcommon::dash_to_minus_js().$endbodytag;
+    }
     return $endbodytag;
 }
 
@@ -7796,6 +7978,18 @@ ul.LC_funclist li {
 		cursor:pointer;
 }
 
+.LCisDisabled {
+  cursor: not-allowed;
+  opacity: 0.5;
+}
+
+a[aria-disabled="true"] {
+  color: currentColor;
+  display: inline-block;  /* For IE11/ MS Edge bug */
+  pointer-events: none;
+  text-decoration: none;
+}
+
 pre.LC_wordwrap {
   white-space: pre-wrap;
   white-space: -moz-pre-wrap;
@@ -7879,6 +8073,7 @@ Inputs: $title - optional title for the
                            (side effect of setting 
                                $env{'internal.head.redirect'} to the url 
                                redirected too)
+                                   4- whether encrypt check should be skipped
             domain         -> force to color decorate a page for a specific
                                domain
             function       -> force usage of a specific rolish color scheme
@@ -7941,8 +8136,10 @@ sub headtag {
         }
     }
     if (ref($args->{'redirect'})) {
-	my ($time,$url,$inhibit_continue) = @{$args->{'redirect'}};
-	$url = &Apache::lonenc::check_encrypt($url);
+	my ($time,$url,$inhibit_continue,$skip_enc_check) = @{$args->{'redirect'}};
+        if (!$skip_enc_check) {
+            $url = &Apache::lonenc::check_encrypt($url);
+        }
 	if (!$inhibit_continue) {
 	    $env{'internal.head.redirect'} = $url;
 	}
@@ -7964,10 +8161,17 @@ ADDMETA
                 unless (&Apache::lonnet::allowed('mau',$dom_in_use)) {
                     my %domdefs = &Apache::lonnet::get_domain_defaults($dom_in_use);
                     my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};
-                    my $offload;
+                    my ($offload,$offloadoth);
                     if (ref($domdefs{'offloadnow'}) eq 'HASH') {
                         if ($domdefs{'offloadnow'}{$lonhost}) {
                             $offload = 1;
+                            if (($env{'user.domain'} ne '') && ($env{'user.domain'} ne $dom_in_use) &&
+                                (!(($env{'user.name'} eq 'public') && ($env{'user.domain'} eq 'public')))) {
+                                unless (&Apache::lonnet::shared_institution($env{'user.domain'})) {
+                                    $offloadoth = 1;
+                                    $dom_in_use = $env{'user.domain'};
+                                }
+                            }
                         }
                     }
                     unless ($offload) {
@@ -7977,6 +8181,7 @@ ADDMETA
                                     (!(($env{'user.name'} eq 'public') && ($env{'user.domain'} eq 'public')))) {
                                     unless (&Apache::lonnet::shared_institution($env{'user.domain'})) {
                                         $offload = 1;
+                                        $offloadoth = 1;
                                         $dom_in_use = $env{'user.domain'};
                                     }
                                 }
@@ -7984,7 +8189,13 @@ ADDMETA
                         }
                     }
                     if ($offload) {
-                        my $newserver = &Apache::lonnet::spareserver(30000,undef,1,$dom_in_use);
+                        my $newserver = &Apache::lonnet::spareserver(undef,30000,undef,1,$dom_in_use);
+                        if (($newserver eq '') && ($offloadoth)) {
+                            my @domains = &Apache::lonnet::current_machine_domains();
+                            if (($dom_in_use ne '') && (!grep(/^\Q$dom_in_use\E$/,@domains))) { 
+                                ($newserver) = &Apache::lonnet::choose_server($dom_in_use);
+                            }
+                        }
                         if (($newserver) && ($newserver ne $lonhost)) {
                             my $numsec = 5;
                             my $timeout = $numsec * 1000;
@@ -7998,7 +8209,7 @@ ADDMETA
                             }
                             if ($locknum) {
                                 my @lockinfo = sort(values(%locks));
-                                $msg = &mt('Once the following tasks are complete: ')."\n".
+                                $msg = &mt('Once the following tasks are complete:')." \n".
                                        join(", ",sort(values(%locks)))."\n";
                                 if (&show_course()) {
                                     $msg .= &mt('your session will be transferred to a different server, after you click "Courses".');
@@ -8160,7 +8371,8 @@ sub print_suppression {
         }
         my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
         my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
-        my $blocked = &blocking_status('printout',$cnum,$cdom,undef,1);
+        my $clientip = &Apache::lonnet::get_requestor_ip();
+        my $blocked = &blocking_status('printout',$clientip,$cnum,$cdom,undef,1);
         if ($blocked) {
             my $checkrole = "cm./$cdom/$cnum";
             if ($env{'request.course.sec'} ne '') {
@@ -8281,6 +8493,9 @@ $args - additional optional args support
                                will contain https://<hostname> if server uses
                                https (as per hosts.tab), but request is for http
              hostname       -> hostname, originally from $r->hostname(), (optional).
+             links_disabled -> Links in primary and secondary menus are disabled
+                               (Can enable them once page has loaded - see lonroles.pm
+                               for an example).
 
 =back
 
@@ -8487,7 +8702,15 @@ ENDLINK
 }
 
 sub modal_adhoc_script {
-    my ($funcname,$width,$height,$content)=@_;
+    my ($funcname,$width,$height,$content,$possmathjax)=@_;
+    my $mathjax;
+    if ($possmathjax) {
+        $mathjax = <<'ENDJAX';
+               if (typeof MathJax == 'object') {
+                   MathJax.Hub.Queue(["Typeset",MathJax.Hub]);
+               }
+ENDJAX
+    }
     return (<<ENDADHOC);
 <script type="text/javascript">
 // <![CDATA[
@@ -8498,6 +8721,7 @@ sub modal_adhoc_script {
                 modalWindow.height = $height;
                 modalWindow.content = '$content';
                 modalWindow.open();
+                $mathjax
         };  
 // ]]>
 </script>
@@ -8505,7 +8729,7 @@ ENDADHOC
 }
 
 sub modal_adhoc_inner {
-    my ($funcname,$width,$height,$content)=@_;
+    my ($funcname,$width,$height,$content,$possmathjax)=@_;
     my $innerwidth=$width-20;
     $content=&js_ready(
                &start_page('Dialog',undef,{'only_body'=>1,'bgcolor'=>'#FFFFFF'}).
@@ -8514,12 +8738,12 @@ sub modal_adhoc_inner {
                  &end_scrollbox().
                  &end_page()
              );
-    return &modal_adhoc_script($funcname,$width,$height,$content);
+    return &modal_adhoc_script($funcname,$width,$height,$content,$possmathjax);
 }
 
 sub modal_adhoc_window {
-    my ($funcname,$width,$height,$content,$linktext)=@_;
-    return &modal_adhoc_inner($funcname,$width,$height,$content).
+    my ($funcname,$width,$height,$content,$linktext,$possmathjax)=@_;
+    return &modal_adhoc_inner($funcname,$width,$height,$content,$possmathjax).
            "<a href=\"javascript:$funcname();void(0);\">".$linktext."</a>";
 }
 
@@ -10375,11 +10599,15 @@ sub sorted_inst_types {
 }
 
 sub get_institutional_codes {
-    my ($settings,$allcourses,$LC_code) = @_;
+    my ($cdom,$crs,$settings,$allcourses,$LC_code) = @_;
 # Get complete list of course sections to update
     my @currsections = ();
     my @currxlists = ();
+    my (%unclutteredsec,%unclutteredlcsec);
     my $coursecode = $$settings{'internal.coursecode'};
+    my $crskey = $crs.':'.$coursecode;
+    @{$unclutteredsec{$crskey}} = ();
+    @{$unclutteredlcsec{$crskey}} = ();
 
     if ($$settings{'internal.sectionnums'} ne '') {
         @currsections = split(/,/,$$settings{'internal.sectionnums'});
@@ -10390,8 +10618,8 @@ sub get_institutional_codes {
     }
 
     if (@currxlists > 0) {
-        foreach (@currxlists) {
-            if (m/^([^:]+):(\w*)$/) {
+        foreach my $xl (@currxlists) {
+            if ($xl =~ /^([^:]+):(\w*)$/) {
                 unless (grep/^$1$/,@{$allcourses}) {
                     push(@{$allcourses},$1);
                     $$LC_code{$1} = $2;
@@ -10399,15 +10627,28 @@ sub get_institutional_codes {
             }
         }
     }
- 
+
     if (@currsections > 0) {
-        foreach (@currsections) {
-            if (m/^(\w+):(\w*)$/) {
-                my $sec = $coursecode.$1;
+        foreach my $sec (@currsections) {
+            if ($sec =~ m/^(\w+):(\w*)$/ ) {
+                my $instsec = $1;
                 my $lc_sec = $2;
-                unless (grep/^$sec$/,@{$allcourses}) {
+                unless (grep/^\Q$instsec\E$/,@{$unclutteredsec{$crskey}}) {
+                    push(@{$unclutteredsec{$crskey}},$instsec);
+                    push(@{$unclutteredlcsec{$crskey}},$lc_sec);
+                }
+            }
+        }
+    }
+
+    if (@{$unclutteredsec{$crskey}} > 0) {
+        my %formattedsec = &Apache::lonnet::auto_instsec_reformat($cdom,'clutter',\%unclutteredsec);
+        if ((ref($formattedsec{$crskey}) eq 'ARRAY') && (ref($unclutteredlcsec{$crskey}) eq 'ARRAY')) {
+            for (my $i=0; $i<@{$formattedsec{$crskey}}; $i++) {
+                my $sec = $coursecode.$formattedsec{$crskey}[$i];
+                unless (grep/^\Q$sec\E$/,@{$allcourses}) {
                     push(@{$allcourses},$sec);
-                    $$LC_code{$sec} = $lc_sec;
+                    $$LC_code{$sec} = $unclutteredlcsec{$crskey}[$i];
                 }
             }
         }
@@ -12938,7 +13179,9 @@ sub process_extracted_files {
                             my $url = '/uploaded/'.$docudom.'/'.$docuname.'/'.
                                       $docstype.'/'.$mapinner{$outer}.'/'.$newidx.'/'.
                                       $title;
-                            if (($outer !~ /\D/) && ($mapinner{$outer} !~ /\D/) && ($newidx !~ /\D/)) {
+                            if (($outer !~ /\D/) &&
+                                (($mapinner{$outer} eq 'default') || ($mapinner{$outer} !~ /\D/)) &&
+                                ($newidx !~ /\D/)) {
                                 if (!-e "$prefix$dir/$docstype/$mapinner{$outer}") {
                                     mkdir("$prefix$dir/$docstype/$mapinner{$outer}",0755);
                                 }
@@ -14699,7 +14942,7 @@ sub recurse_categories {
         for (my $k=0; $k<@{$cats->[$depth]{$category}}; $k++) {
             my $name = $cats->[$depth]{$category}[$k];
             my $item = &escape($category).':'.&escape($parents->[-1]).':'.$shallower;
-            my $trailstr = join(' -&gt; ',(@{$parents},$category));
+            my $trailstr = join(' &raquo; ',(@{$parents},$category));
             if ($allitems->{$item} eq '') {
                 push(@{$trails},$trailstr);
                 $allitems->{$item} = scalar(@{$trails})-1;
@@ -14977,7 +15220,8 @@ sub commit_studentrole {
                 }
                 $oldsecurl = $uurl;
                 $expire_role_result = 
-                    &Apache::lonnet::assignrole($udom,$uname,$uurl,'st',$now,'','',$context);
+                    &Apache::lonnet::assignrole($udom,$uname,$uurl,'st',$now,
+                                                '','','',$context);
                 if ($env{'request.course.sec'} ne '') { 
                     if ($expire_role_result eq 'refused') {
                         my @roles = ('st');
@@ -15089,8 +15333,7 @@ sub check_clone {
     my $cloneid='/'.$args->{'clonedomain'}.'/'.$args->{'clonecourse'};
     my ($clonecrsudom,$clonecrsunum)= &LONCAPA::split_courseid($cloneid);
     my $clonehome=&Apache::lonnet::homeserver($clonecrsunum,$clonecrsudom);
-    my $clonetitle;
-    my @clonemsg;
+    my $clonemsg;
     my $can_clone = 0;
     my $lctype = lc($args->{'crstype'});
     if ($lctype ne 'community') {
@@ -15098,38 +15341,16 @@ sub check_clone {
     }
     if ($clonehome eq 'no_host') {
         if ($args->{'crstype'} eq 'Community') {
-            push(@clonemsg,({
-                              mt => 'No new community created.',
-                              args => [],
-                            },
-                            {
-                              mt => 'A new community could not be cloned from the specified original - [_1] - because it is a non-existent community.',
-                              args => [$args->{'clonedomain'}.':'.$args->{'clonedomain'}],
-                            }));
+            $clonemsg = &mt('No new community created.').$linefeed.&mt('A new community could not be cloned from the specified original - [_1] - because it is a non-existent community.',$args->{'clonecourse'}.':'.$args->{'clonedomain'});
         } else {
-            push(@clonemsg,({
-                              mt => 'No new course created.',
-                              args => [],
-                            },
-                            {
-                              mt => 'A new course could not be cloned from the specified original - [_1] - because it is a non-existent course.',
-                              args => [$args->{'clonecourse'}.':'.$args->{'clonedomain'}],
-                            }));
-        }
+            $clonemsg = &mt('No new course created.').$linefeed.&mt('A new course could not be cloned from the specified original - [_1] - because it is a non-existent course.',$args->{'clonecourse'}.':'.$args->{'clonedomain'});
+        }     
     } else {
 	my %clonedesc = &Apache::lonnet::coursedescription($cloneid,{'one_time' => 1});
-        $clonetitle = $clonedesc{'description'};
         if ($args->{'crstype'} eq 'Community') {
             if ($clonedesc{'type'} ne 'Community') {
-                push(@clonemsg,({
-                                  mt => 'No new community created.',
-                                  args => [],
-                                },
-                                {
-                                  mt => 'A new community could not be cloned from the specified original - [_1] - because it is a course not a community.',
-                                  args => [$args->{'clonecourse'}.':'.$args->{'clonedomain'}],
-                                }));
-                return ($can_clone,\@clonemsg,$cloneid,$clonehome);
+                 $clonemsg = &mt('No new community created.').$linefeed.&mt('A new community could not be cloned from the specified original - [_1] - because it is a course not a community.',$args->{'clonecourse'}.':'.$args->{'clonedomain'});
+                return ($can_clone, $clonemsg, $cloneid, $clonehome);
             }
         }
 	if (($env{'request.role.domain'} eq $args->{'clonedomain'}) &&
@@ -15218,34 +15439,20 @@ sub check_clone {
             }
             unless ($can_clone) {
                 if ($args->{'crstype'} eq 'Community') {
-                    push(@clonemsg,({
-                                      mt => 'No new community created.',
-                                      args => [],
-                                    },
-                                    {
-                                      mt => 'The new community could not be cloned from the existing community because the new community owner ([_1]) does not have cloning rights in the existing community ([_2]).',
-                                      args => [$args->{'ccuname'}.':'.$args->{'ccdomain'},$clonedesc{'description'}],
-                                    }));
+                    $clonemsg = &mt('No new community created.').$linefeed.&mt('The new community could not be cloned from the existing community because the new community owner ([_1]) does not have cloning rights in the existing community ([_2]).',$args->{'ccuname'}.':'.$args->{'ccdomain'},$clonedesc{'description'});
                 } else {
-                    push(@clonemsg,({
-                                      mt => 'No new course created.',
-                                      args => [],
-                                    },
-                                    {
-                                      mt => 'The new course could not be cloned from the existing course because the new course owner ([_1]) does not have cloning rights in the existing course ([_2]).',
-                                      args => [$args->{'ccuname'}.':'.$args->{'ccdomain'},$clonedesc{'description'}],
-                                    }));
-                }
+                    $clonemsg = &mt('No new course created.').$linefeed.&mt('The new course could not be cloned from the existing course because the new course owner ([_1]) does not have cloning rights in the existing course ([_2]).',$args->{'ccuname'}.':'.$args->{'ccdomain'},$clonedesc{'description'});
+	        }
 	    }
         }
     }
-    return ($can_clone,\@clonemsg,$cloneid,$clonehome,$clonetitle);
+    return ($can_clone, $clonemsg, $cloneid, $clonehome);
 }
 
 sub construct_course {
     my ($args,$logmsg,$courseid,$crsudom,$crsunum,$udom,$uname,$context,
-        $cnum,$category,$coderef,$callercontext,$user_lh) = @_;
-    my ($outcome,$msgref,$clonemsgref);
+        $cnum,$category,$coderef) = @_;
+    my $outcome;
     my $linefeed =  '<br />'."\n";
     if ($context eq 'auto') {
         $linefeed = "\n";
@@ -15254,11 +15461,18 @@ sub construct_course {
 #
 # Are we cloning?
 #
-    my ($can_clone,$cloneid,$clonehome,$clonetitle);
+    my ($can_clone, $clonemsg, $cloneid, $clonehome);
     if (($args->{'clonecourse'}) && ($args->{'clonedomain'})) {
-	($can_clone,$clonemsgref,$cloneid,$clonehome,$clonetitle) = &check_clone($args,$linefeed);
+	($can_clone, $clonemsg, $cloneid, $clonehome) = &check_clone($args,$linefeed);
+	if ($context ne 'auto') {
+            if ($clonemsg ne '') {
+	        $clonemsg = '<span class="LC_error">'.$clonemsg.'</span>';
+            }
+	}
+	$outcome .= $clonemsg.$linefeed;
+
         if (!$can_clone) {
-	    return (0,$outcome,$clonemsgref);
+	    return (0,$outcome);
 	}
     }
 
@@ -15276,20 +15490,15 @@ sub construct_course {
                                              $args->{'ccuname'}.':'.
                                              $args->{'ccdomain'},
                                              $args->{'crstype'},
-                                             $cnum,$context,$category,
-                                             $callercontext);
+                                             $cnum,$context,$category);
 
     # Note: The testing routines depend on this being output; see 
     # Utils::Course. This needs to at least be output as a comment
     # if anyone ever decides to not show this, and Utils::Course::new
     # will need to be suitably modified.
-    if (($callercontext eq 'auto') && ($user_lh ne '')) {
-        $outcome .= &mt_user($user_lh,'New LON-CAPA [_1] ID: [_2]',$crstype,$$courseid).$linefeed;
-    } else {
-        $outcome .= &mt('New LON-CAPA [_1] ID: [_2]',$crstype,$$courseid).$linefeed;
-    }
+    $outcome .= &mt('New LON-CAPA [_1] ID: [_2]',$crstype,$$courseid).$linefeed;
     if ($$courseid =~ /^error:/) {
-        return (0,$outcome,$clonemsgref);
+        return (0,$outcome);
     }
 
 #
@@ -15298,37 +15507,23 @@ sub construct_course {
     ($$crsudom,$$crsunum)= &LONCAPA::split_courseid($$courseid);
     my $crsuhome=&Apache::lonnet::homeserver($$crsunum,$$crsudom);
     if ($crsuhome eq 'no_host') {
-        if (($callercontext eq 'auto') && ($user_lh ne '')) {
-            $outcome .= &mt_user($user_lh,
-                            'Course creation failed, unrecognized course home server.');
-        } else {
-            $outcome .= &mt('Course creation failed, unrecognized course home server.');
-        }
-        $outcome .= $linefeed;
-        return (0,$outcome,$clonemsgref);
+        $outcome .= &mt('Course creation failed, unrecognized course home server.').$linefeed;
+        return (0,$outcome);
     }
     $outcome .= &mt('Created on').': '.$crsuhome.$linefeed;
 
 #
 # Do the cloning
 #   
-    my @clonemsg;
     if ($can_clone && $cloneid) {
-        push(@clonemsg,
-                      {
-                          mt => 'Created [_1] by cloning from [_2]',
-                          args => [$crstype,$clonetitle],
-                      });
+	$clonemsg = &mt('Cloning [_1] from [_2]',$crstype,$clonehome);
+	if ($context ne 'auto') {
+	    $clonemsg = '<span class="LC_success">'.$clonemsg.'</span>';
+	}
+	$outcome .= $clonemsg.$linefeed;
 	my %oldcenv=&Apache::lonnet::dump('environment',$$crsudom,$$crsunum);
 # Copy all files
-        my @info =
-	    &Apache::lonclonecourse::copycoursefiles($cloneid,$$courseid,$args->{'datemode'},
-                                                     $args->{'dateshift'},$args->{'crscode'},
-                                                     $args->{'ccuname'}.':'.$args->{'ccdomain'},
-                                                     $args->{'tinyurls'});
-        if (@info) {
-            push(@clonemsg,@info);
-        }
+	&Apache::lonclonecourse::copycoursefiles($cloneid,$$courseid,$args->{'datemode'},$args->{'dateshift'});
 # Restore URL
 	$cenv{'url'}=$oldcenv{'url'};
 # Restore title
@@ -15353,8 +15548,7 @@ sub construct_course {
                    'plc.users.denied',
                    'hidefromcat',
                    'checkforpriv',
-                   'categories',
-                   'internal.uniquecode'],
+                   'categories'],
                    $$crsudom,$$crsunum);
         if ($args->{'textbook'}) {
             $cenv{'internal.textbook'} = $args->{'textbook'};
@@ -15390,6 +15584,7 @@ sub construct_course {
         $cenv{'internal.defaultcredits'} = $args->{'defaultcredits'};
     }
     my @badclasses = (); # Used to accumulate sections/crosslistings that did not pass classlist access check for course owner.
+    my @oklcsecs = (); # Used to accumulate LON-CAPA sections for validated institutional sections.
     if ($args->{'crssections'}) {
         $cenv{'internal.sectionnums'} = '';
         if ($args->{'crssections'} =~ m/,/) {
@@ -15403,7 +15598,11 @@ sub construct_course {
                 my $class = $args->{'crscode'}.$sec;
                 my $addcheck = &Apache::lonnet::auto_new_course($$crsunum,$$crsudom,$class,$cenv{'internal.courseowner'});
                 $cenv{'internal.sectionnums'} .= $item.',';
-                unless ($addcheck eq 'ok') {
+                if ($addcheck eq 'ok') {
+                    unless (grep(/^\Q$gp\E$/,@oklcsecs)) {
+                        push(@oklcsecs,$gp);
+                    }
+                } else {
                     push(@badclasses,$class);
                 }
             }
@@ -15431,7 +15630,11 @@ sub construct_course {
                 my ($xl,$gp) = split/:/,$item;
                 my $addcheck =  &Apache::lonnet::auto_new_course($$crsunum,$$crsudom,$xl,$cenv{'internal.courseowner'});
                 $cenv{'internal.crosslistings'} .= $item.',';
-                unless ($addcheck eq 'ok') {
+                if ($addcheck eq 'ok') {
+                    unless (grep(/^\Q$gp\E$/,@oklcsecs)) {
+                        push(@oklcsecs,$gp);
+                    }
+                } else {
                     push(@badclasses,$xl);
                 }
             }
@@ -15494,6 +15697,36 @@ sub construct_course {
     if ($args->{'no_end_date'}) {
         $args->{'endaccess'} = 0;
     }
+#  If an official course with institutional sections is created by cloning
+#  an existing course, section-specific hiding of course totals in student's
+#  view of grades as copied from cloned course, will be checked for valid
+#  sections.
+    if (($can_clone && $cloneid) &&
+        ($cenv{'internal.coursecode'} ne '') &&
+        ($cenv{'grading'} eq 'standard') &&
+        ($cenv{'hidetotals'} ne '') &&
+        ($cenv{'hidetotals'} ne 'all')) {
+        my @hidesecs;
+        my $deletehidetotals;
+        if (@oklcsecs) {
+            foreach my $sec (split(/,/,$cenv{'hidetotals'})) {
+                if (grep(/^\Q$sec$/,@oklcsecs)) {
+                    push(@hidesecs,$sec);
+                }
+            }
+            if (@hidesecs) {
+                $cenv{'hidetotals'} = join(',',@hidesecs);
+            } else {
+                $deletehidetotals = 1;
+            }
+        } else {
+            $deletehidetotals = 1;
+        }
+        if ($deletehidetotals) {
+            delete($cenv{'hidetotals'});
+            &Apache::lonnet::del('environment',['hidetotals'],$$crsudom,$$crsunum);
+        }
+    }
     $cenv{'internal.autostart'}=$args->{'enrollstart'};
     $cenv{'internal.autoend'}=$args->{'enrollend'};
     $cenv{'default_enrollment_start_date'}=$args->{'startaccess'};
@@ -15635,7 +15868,7 @@ sub construct_course {
         $outcome .= ($fatal?$errtext:'write ok').$linefeed;
     }
 
-    return (1,$outcome,\@clonemsg);
+    return (1,$outcome);
 }
 
 sub make_unique_code {
@@ -15804,6 +16037,24 @@ sub compare_arrays {
     return @difference;
 }
 
+sub lon_status_items {
+    my %defaults = (
+                     E         => 100,
+                     W         => 4,
+                     N         => 1,
+                     U         => 5,
+                     threshold => 200,
+                     sysmail   => 2500,
+                   );
+    my %names = (
+                   E => 'Errors',
+                   W => 'Warnings',
+                   N => 'Notices',
+                   U => 'Unsent',
+                );
+    return (\%defaults,\%names);
+}
+
 # -------------------------------------------------------- Initialize user login
 sub init_user_environment {
     my ($r, $username, $domain, $authhost, $form, $args) = @_;
@@ -15906,6 +16157,7 @@ sub init_user_environment {
 # --------------------------------------------------------- Write first profile
 
     {
+        my $ip = &Apache::lonnet::get_requestor_ip();
 	my %initial_env = 
 	    ("user.name"          => $username,
 	     "user.domain"        => $domain,
@@ -15924,7 +16176,7 @@ sub init_user_environment {
 	     "request.course.sec" => '',
 	     "request.role"       => 'cm',
 	     "request.role.adv"   => $env{'user.adv'},
-	     "request.host"       => $ENV{'REMOTE_ADDR'},);
+	     "request.host"       => $ip,);
 
         if ($form->{'localpath'}) {
 	    $initial_env{"browser.localpath"}  = $form->{'localpath'};
@@ -16784,12 +17036,8 @@ sub needs_coursereinit {
         $interval = 600;
     }
     if (($now-$env{'request.course.timechecked'})>$interval) {
-        &Apache::lonnet::appenv({'request.course.timechecked'=>$now});
-        my $blocked = &blocking_status('reinit',$cnum,$cdom,undef,1);
-        if ($blocked) {
-            return ();
-        }
         my $lastchange = &Apache::lonnet::get_coursechange($cdom,$cnum);
+        &Apache::lonnet::appenv({'request.course.timechecked'=>$now});
         if ($lastchange > $env{'request.course.tied'}) {
             my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
             if ($curr_reqd_hash{'internal.releaserequired'} ne '') {
@@ -16904,9 +17152,12 @@ sub recurse_supplemental {
         if ($fatal) {
             $errors ++;
         } else {
-            if ($#LONCAPA::map::resources > 0) {
-                foreach my $res (@LONCAPA::map::resources) {
-                    my ($title,$src,$ext,$type,$status)=split(/\:/,$res);
+            my @order = @LONCAPA::map::order;
+            if (@order > 0) {
+                my @resources = @LONCAPA::map::resources;
+                my @resparms = @LONCAPA::map::resparms;
+                foreach my $idx (@order) {
+                    my ($title,$src,$ext,$type,$status)=split(/\:/,$resources[$idx]);
                     if (($src ne '') && ($status eq 'res')) {
                         if ($src =~ m{^\Q/uploaded/$cdom/$cnum/\E(supplemental_\d+\.sequence)$}) {
                             ($numfiles,$errors) = &recurse_supplemental($cnum,$cdom,$1,$numfiles,$errors);
@@ -17111,13 +17362,17 @@ sub create_captcha {
 
         if (-e $Apache::lonnet::perlvar{'lonCaptchaDir'}.'/'.$md5sum.'.png') {
             $output = '<input type="hidden" name="crypt" value="'.$md5sum.'" />'."\n".
+                      '<span class="LC_nobreak">'.
                       &mt('Type in the letters/numbers shown below').'&nbsp;'.
-                      '<input type="text" size="5" name="code" value="" autocomplete="off" />'.
-                      '<br />'.
+                      '<input type="text" size="5" name="code" value="" autocomplete="new-password" />'.
+                      '</span><br />'.
                       '<img src="'.$captcha_params{'www_output_dir'}.'/'.$md5sum.'.png" alt="captcha" />';
             last;
         }
     }
+    if ($output eq '') {
+        &Apache::lonnet::logthis("Failed to create Captcha code after $tries attempts.");
+    }
     return $output;
 }
 
@@ -17156,7 +17411,8 @@ sub check_captcha {
 sub create_recaptcha {
     my ($pubkey,$version) = @_;
     if ($version >= 2) {
-        return '<div class="g-recaptcha" data-sitekey="'.$pubkey.'"></div>';
+        return '<div class="g-recaptcha" data-sitekey="'.$pubkey.'"></div>'.
+               '<div style="padding:0;clear:both;margin:0;border:0"></div>';
     } else {
         my $use_ssl;
         if ($ENV{'SERVER_PORT'} == 443) {
@@ -17174,13 +17430,14 @@ sub create_recaptcha {
 sub check_recaptcha {
     my ($privkey,$version) = @_;
     my $captcha_chk;
+    my $ip = &Apache::lonnet::get_requestor_ip(); 
     if ($version >= 2) {
         my $ua = LWP::UserAgent->new;
         $ua->timeout(10);
         my %info = (
                      secret   => $privkey,
                      response => $env{'form.g-recaptcha-response'},
-                     remoteip => $ENV{'REMOTE_ADDR'},
+                     remoteip => $ip,
                    );
         my $response = $ua->post('https://www.google.com/recaptcha/api/siteverify',\%info);
         if ($response->is_success)  {
@@ -17196,7 +17453,7 @@ sub check_recaptcha {
         my $captcha_result =
             $captcha->check_answer(
                                     $privkey,
-                                    $ENV{'REMOTE_ADDR'},
+                                    $ip,
                                     $env{'form.recaptcha_challenge_field'},
                                     $env{'form.recaptcha_response_field'},
                                   );
@@ -17245,31 +17502,18 @@ sub cleanup_html {
 
 # Checks for critical messages and returns a redirect url if one exists.
 # $interval indicates how often to check for messages.
-# $context is the calling context -- roles, grades, contents, menu or flip.
 sub critical_redirect {
-    my ($interval,$context) = @_;
+    my ($interval) = @_;
+    unless (($env{'user.domain'} ne '') && ($env{'user.name'} ne '')) {
+        return ();
+    }
     if ((time-$env{'user.criticalcheck.time'})>$interval) {
-        if (($env{'request.course.id'}) && (($context eq 'flip') || ($context eq 'contents'))) {
-            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
-            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
-            my $blocked = &blocking_status('alert',$cnum,$cdom,undef,1);
-            if ($blocked) {
-                my $checkrole = "cm./$cdom/$cnum";
-                if ($env{'request.course.sec'} ne '') {
-                    $checkrole .= "/$env{'request.course.sec'}";
-                }
-                unless ((&Apache::lonnet::allowed('evb',undef,undef,$checkrole)) &&
-                        ($env{'request.role'} !~ m{^st\./$cdom/$cnum})) {
-                    return;
-                }
-            }
-        }
         my @what=&Apache::lonnet::dump('critical', $env{'user.domain'},
                                         $env{'user.name'});
         &Apache::lonnet::appenv({'user.criticalcheck.time'=>time});
         my $redirecturl;
         if ($what[0]) {
-            if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
+            if (($what[0] ne 'con_lost') && ($what[0] ne 'no_such_host') && ($what[0]!~/^error\:/)) {
                 $redirecturl='/adm/email?critical=display';
                 my $url=&Apache::lonnet::absolute_url().$redirecturl;
                 return (1, $url);
@@ -17329,146 +17573,6 @@ sub des_decrypt {
     return $plaintext;
 }
 
-sub get_requested_shorturls {
-    my ($cdom,$cnum,$navmap) = @_;
-    return unless (ref($navmap));
-    my ($numnew,$errors);
-    my @toshorten = &Apache::loncommon::get_env_multiple('form.addtiny');
-    if (@toshorten) {
-        my (%maps,%resources,%titles);
-        &Apache::loncourserespicker::enumerate_course_contents($navmap,\%maps,\%resources,\%titles,
-                                                               'shorturls',$cdom,$cnum);
-        if (keys(%resources)) {
-            my %tocreate;
-            foreach my $item (sort {$a <=> $b} (@toshorten)) {
-                my $symb = $resources{$item};
-                if ($symb) {
-                    $tocreate{$cnum.'&'.$symb} = 1;
-                }
-            }
-            if (keys(%tocreate)) {
-                ($numnew,$errors) = &make_short_symbs($cdom,$cnum,
-                                                      \%tocreate);
-            }
-        }
-    }
-    return ($numnew,$errors);
-}
-
-sub make_short_symbs {
-    my ($cdom,$cnum,$tocreateref,$lockuser) = @_;
-    my ($numnew,@errors);
-    if (ref($tocreateref) eq 'HASH') {
-        my %tocreate = %{$tocreateref};
-        if (keys(%tocreate)) {
-            my %coursetiny = &Apache::lonnet::dump('tiny',$cdom,$cnum);
-            my $su = Short::URL->new(no_vowels => 1);
-            my $init = '';
-            my (%newunique,%addcourse,%courseonly,%failed);
-            # get lock on tiny db
-            my $now = time;
-            if ($lockuser eq '') {
-                $lockuser = $env{'user.name'}.':'.$env{'user.domain'};
-            }
-            my $lockhash = {
-                                "lock\0$now" => $lockuser,
-                            };
-            my $tries = 0;
-            my $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom);
-            my ($code,$error);
-            while (($gotlock ne 'ok') && ($tries<3)) {
-                $tries ++;
-                sleep 1;
-                $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom);
-            }
-            if ($gotlock eq 'ok') {
-                $init = &shorten_symbs($cdom,$init,$su,\%coursetiny,\%tocreate,\%newunique,
-                                       \%addcourse,\%courseonly,\%failed);
-                if (keys(%failed)) {
-                    my $numfailed = scalar(keys(%failed));
-                    push(@errors,&mt('error: could not obtain unique six character URL for [quant,_1,resource]',$numfailed));
-                }
-                if (keys(%newunique)) {
-                    my $putres = &Apache::lonnet::newput_dom('tiny',\%newunique,$cdom);
-                    if ($putres eq 'ok') {
-                        $numnew = scalar(keys(%newunique));
-                        my $newputres = &Apache::lonnet::newput('tiny',\%addcourse,$cdom,$cnum);
-                        unless ($newputres eq 'ok') {
-                            push(@errors,&mt('error: could not store course look-up of short URLs'));
-                        }
-                    } else {
-                        push(@errors,&mt('error: could not store unique six character URLs'));
-                    }
-                }
-            }
-        }
-    }
-    return ($numnew,\@errors);
-}
-
-sub shorten_symbs {
-    my ($cdom,$init,$su,$coursetiny,$tocreate,$newunique,$addcourse,$courseonly,$failed) = @_;
-    return unless ((ref($su)) && (ref($coursetiny) eq 'HASH') && (ref($tocreate) eq 'HASH') &&
-                   (ref($newunique) eq 'HASH') && (ref($addcourse) eq 'HASH') &&
-                   (ref($courseonly) eq 'HASH') && (ref($failed) eq 'HASH'));
-    my (%possibles,%collisions);
-    foreach my $key (keys(%{$tocreate})) {
-        my $num = String::CRC32::crc32($key);
-        my $tiny = $su->encode($num,$init);
-        if ($tiny) {
-            $possibles{$tiny} = $key;
-        }
-    }
-    if (!$init) {
-        $init = 1;
-    } else {
-        $init ++;
-    }
-    if (keys(%possibles)) {
-        my @posstiny = keys(%possibles);
-        my $configuname = &Apache::lonnet::get_domainconfiguser($cdom);
-        my %currtiny = &Apache::lonnet::get('tiny',\@posstiny,$cdom,$configuname);
-        if (keys(%currtiny)) {
-            foreach my $key (keys(%currtiny)) {
-                next if ($currtiny{$key} eq '');
-                if ($currtiny{$key} eq $possibles{$key}) {
-                    my ($tcnum,$tsymb) = split(/\&/,$currtiny{$key});
-                    unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) {
-                        $courseonly->{$tsymb} = $key;
-                    }
-                } else {
-                    $collisions{$possibles{$key}} = 1;
-                }
-                delete($possibles{$key});
-            }
-        }
-        foreach my $key (keys(%possibles)) {
-            $newunique->{$key} = $possibles{$key};
-            my ($tcnum,$tsymb) = split(/\&/,$possibles{$key});
-            unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) {
-                $addcourse->{$tsymb} = $key;
-            }
-        }
-    }
-    if (keys(%collisions)) {
-        if ($init <5) {
-            if (!$init) {
-                $init = 1;
-            } else {
-                $init ++;
-            }
-            $init = &shorten_symbs($cdom,$init,$su,$coursetiny,\%collisions,
-                                   $newunique,$addcourse,$courseonly,$failed);
-        } else {
-            foreach my $key (keys(%collisions)) {
-                $failed->{$key} = 1;
-                $failed->{$key} = 1;
-            }
-        }
-    }
-    return $init;
-}
-
 sub is_nonframeable {
     my ($url,$absolute,$hostname,$ip,$nocache) = @_;
     my ($remprotocol,$remhost) = ($url =~ m{^(https?)\://(([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,})}i);