--- loncom/interface/loncommon.pm	2015/03/06 23:05:07	1.1075.2.87
+++ loncom/interface/loncommon.pm	2019/02/03 22:31:17	1.1075.2.131
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1075.2.87 2015/03/06 23:05:07 raeburn Exp $
+# $Id: loncommon.pm,v 1.1075.2.131 2019/02/03 22:31:17 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -72,11 +72,16 @@ use Apache::lonuserstate();
 use Apache::courseclassifier();
 use LONCAPA qw(:DEFAULT :match);
 use DateTime::TimeZone;
-use DateTime::Locale::Catalog;
+use DateTime::Locale;
+use Encode();
 use Authen::Captcha;
 use Captcha::reCAPTCHA;
+use JSON::DWIW;
+use LWP::UserAgent;
 use Crypt::DES;
 use DynaLoader; # for Crypt::DES version
+use File::Copy();
+use File::Path();
 
 # ---------------------------------------------- Designs
 use vars qw(%defaultdesign);
@@ -191,7 +196,7 @@ BEGIN {
     {
         my $langtabfile = $Apache::lonnet::perlvar{'lonTabDir'}.
                                    '/language.tab';
-        if ( open(my $fh,"<$langtabfile") ) {
+        if ( open(my $fh,'<',$langtabfile) ) {
             while (my $line = <$fh>) {
                 next if ($line=~/^\#/);
                 chomp($line);
@@ -212,7 +217,7 @@ BEGIN {
     {
         my $copyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
                                   '/copyright.tab';
-        if ( open (my $fh,"<$copyrightfile") ) {
+        if ( open (my $fh,'<',$copyrightfile) ) {
             while (my $line = <$fh>) {
                 next if ($line=~/^\#/);
                 chomp($line);
@@ -226,7 +231,7 @@ BEGIN {
     {
         my $sourcecopyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
                                   '/source_copyright.tab';
-        if ( open (my $fh,"<$sourcecopyrightfile") ) {
+        if ( open (my $fh,'<',$sourcecopyrightfile) ) {
             while (my $line = <$fh>) {
                 next if ($line =~ /^\#/);
                 chomp($line);
@@ -240,7 +245,7 @@ BEGIN {
 # -------------------------------------------------------------- default domain designs
     my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
     my $designfile = $designdir.'/default.tab';
-    if ( open (my $fh,"<$designfile") ) {
+    if ( open (my $fh,'<',$designfile) ) {
         while (my $line = <$fh>) {
             next if ($line =~ /^\#/);
             chomp($line);
@@ -254,12 +259,12 @@ BEGIN {
     {
         my $categoryfile = $Apache::lonnet::perlvar{'lonTabDir'}.
                                   '/filecategories.tab';
-        if ( open (my $fh,"<$categoryfile") ) {
+        if ( open (my $fh,'<',$categoryfile) ) {
 	    while (my $line = <$fh>) {
 		next if ($line =~ /^\#/);
 		chomp($line);
                 my ($extension,$category)=(split(/\s+/,$line,2));
-                push @{$category_extensions{lc($category)}},$extension;
+                push(@{$category_extensions{lc($category)}},$extension);
             }
             close($fh);
         }
@@ -269,7 +274,7 @@ BEGIN {
     {
         my $typesfile = $Apache::lonnet::perlvar{'lonTabDir'}.
                '/filetypes.tab';
-        if ( open (my $fh,"<$typesfile") ) {
+        if ( open (my $fh,'<',$typesfile) ) {
             while (my $line = <$fh>) {
 		next if ($line =~ /^\#/);
 		chomp($line);
@@ -532,7 +537,7 @@ ENDAUTHORBRW
 
 sub coursebrowser_javascript {
     my ($domainfilter,$sec_element,$formname,$role_element,$crstype,
-        $credits_element) = @_;
+        $credits_element,$instcode) = @_;
     my $wintitle = 'Course_Browser';
     if ($crstype eq 'Community') {
         $wintitle = 'Community_Browser';
@@ -583,6 +588,12 @@ sub coursebrowser_javascript {
             var ownername = document.forms[formid].ccuname.value;
             var ownerdom =  document.forms[formid].ccdomain.options[document.forms[formid].ccdomain.selectedIndex].value;
             url += '&cloner='+ownername+':'+ownerdom;
+            if (type == 'Course') {
+                url += '&crscode='+document.forms[formid].crscode.value;
+            }
+        }
+        if (formname == 'requestcrs') {
+            url += '&crsdom=$domainfilter&crscode=$instcode';
         }
         if (multflag !=null && multflag != '') {
             url += '&multiple='+multflag;
@@ -927,8 +938,8 @@ ENDSCRT
 }
 
 sub select_timezone {
-   my ($name,$selected,$onchange,$includeempty)=@_;
-   my $output='<select name="'.$name.'" '.$onchange.'>'."\n";
+   my ($name,$selected,$onchange,$includeempty,$disabled)=@_;
+   my $output='<select name="'.$name.'" '.$onchange.$disabled.'>'."\n";
    if ($includeempty) {
        $output .= '<option value=""';
        if (($selected eq '') || ($selected eq 'local')) {
@@ -949,8 +960,8 @@ sub select_timezone {
 }
 
 sub select_datelocale {
-    my ($name,$selected,$onchange,$includeempty)=@_;
-    my $output='<select name="'.$name.'" '.$onchange.'>'."\n";
+    my ($name,$selected,$onchange,$includeempty,$disabled)=@_;
+    my $output='<select name="'.$name.'" '.$onchange.$disabled.'>'."\n";
     if ($includeempty) {
         $output .= '<option value=""';
         if ($selected eq '') {
@@ -958,15 +969,16 @@ sub select_datelocale {
         }
         $output .= '> </option>';
     }
+    my @languages = &Apache::lonlocal::preferred_languages();
     my (@possibles,%locale_names);
-    my @locales = DateTime::Locale::Catalog::Locales;
-    foreach my $locale (@locales) {
-        if (ref($locale) eq 'HASH') {
-            my $id = $locale->{'id'};
-            if ($id ne '') {
-                my $en_terr = $locale->{'en_territory'};
-                my $native_terr = $locale->{'native_territory'};
-                my @languages = &Apache::lonlocal::preferred_languages();
+    my @locales = DateTime::Locale->ids();
+    foreach my $id (@locales) {
+        if ($id ne '') {
+            my ($en_terr,$native_terr);
+            my $loc = DateTime::Locale->load($id);
+            if (ref($loc)) {
+                $en_terr = $loc->name();
+                $native_terr = $loc->native_name();
                 if (grep(/^en$/,@languages) || !@languages) {
                     if ($en_terr ne '') {
                         $locale_names{$id} = '('.$en_terr.')';
@@ -980,7 +992,8 @@ sub select_datelocale {
                         $locale_names{$id} = '('.$en_terr.')';
                     }
                 }
-                push (@possibles,$id);
+                $locale_names{$id} = Encode::encode('UTF-8',$locale_names{$id});
+                push(@possibles,$id);
             }
         }
     }
@@ -991,7 +1004,7 @@ sub select_datelocale {
         }
         $output.=">$item";
         if ($locale_names{$item} ne '') {
-            $output.="  $locale_names{$item}</option>\n";
+            $output.='  '.$locale_names{$item};
         }
         $output.="</option>\n";
     }
@@ -1000,7 +1013,7 @@ sub select_datelocale {
 }
 
 sub select_language {
-    my ($name,$selected,$includeempty) = @_;
+    my ($name,$selected,$includeempty,$noedit) = @_;
     my %langchoices;
     if ($includeempty) {
         %langchoices = ('' => 'No language preference');
@@ -1012,7 +1025,7 @@ sub select_language {
         }
     }
     %langchoices = &Apache::lonlocal::texthash(%langchoices);
-    return &select_form($selected,$name,\%langchoices);
+    return &select_form($selected,$name,\%langchoices,undef,$noedit);
 }
 
 =pod
@@ -1127,7 +1140,7 @@ sub linked_select_forms {
         $result.="select2data.d_$s1.texts = new Array(";        
         my @s2texts;
         foreach my $value (@s2values) {
-            push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
+            push(@s2texts, $hashref->{$s1}->{'select2'}->{$value});
         }
         $result.="\"@s2texts\");\n";
     }
@@ -1733,6 +1746,242 @@ RESIZE
 
 }
 
+sub colorfuleditor_js {
+    return <<"COLORFULEDIT"
+<script type="text/javascript">
+// <![CDATA[>
+    function fold_box(curDepth, lastresource){
+
+    // we need a list because there can be several blocks you need to fold in one tag
+        var block = document.getElementsByName('foldblock_'+curDepth);
+    // but there is only one folding button per tag
+        var foldbutton = document.getElementById('folding_btn_'+curDepth);
+
+        if(block.item(0).style.display == 'none'){
+
+            foldbutton.value = '@{[&mt("Hide")]}';
+            for (i = 0; i < block.length; i++){
+                block.item(i).style.display = '';
+            }
+        }else{
+
+            foldbutton.value = '@{[&mt("Show")]}';
+            for (i = 0; i < block.length; i++){
+                // block.item(i).style.visibility = 'collapse';
+                block.item(i).style.display = 'none';
+            }
+        };
+        saveState(lastresource);
+    }
+
+    function saveState (lastresource) {
+
+        var tag_list = getTagList();
+        if(tag_list != null){
+            var timestamp = new Date().getTime();
+            var key = lastresource;
+
+            // the value pattern is: 'time;key1,value1;key2,value2; ... '
+            // starting with timestamp
+            var value = timestamp+';';
+
+            // building the list of key-value pairs
+            for(var i = 0; i < tag_list.length; i++){
+                value += tag_list[i]+',';
+                value += document.getElementsByName(tag_list[i])[0].style.display+';';
+            }
+
+            // only iterate whole storage if nothing to override
+            if(localStorage.getItem(key) == null){
+
+                // prevent storage from growing large
+                if(localStorage.length > 50){
+                    var regex_getTimestamp = /^(?:\d)+;/;
+                    var oldest_timestamp = regex_getTimestamp.exec(localStorage.key(0));
+                    var oldest_key;
+
+                    for(var i = 1; i < localStorage.length; i++){
+                        if (regex_getTimestamp.exec(localStorage.key(i)) < oldest_timestamp) {
+                            oldest_key = localStorage.key(i);
+                            oldest_timestamp = regex_getTimestamp.exec(oldest_key);
+                        }
+                    }
+                    localStorage.removeItem(oldest_key);
+                }
+            }
+            localStorage.setItem(key,value);
+        }
+    }
+
+    // restore folding status of blocks (on page load)
+    function restoreState (lastresource) {
+        if(localStorage.getItem(lastresource) != null){
+            var key = lastresource;
+            var value = localStorage.getItem(key);
+            var regex_delTimestamp = /^\d+;/;
+
+            value.replace(regex_delTimestamp, '');
+
+            var valueArr = value.split(';');
+            var pairs;
+            var elements;
+            for (var i = 0; i < valueArr.length; i++){
+                pairs = valueArr[i].split(',');
+                elements = document.getElementsByName(pairs[0]);
+
+                for (var j = 0; j < elements.length; j++){
+                    elements[j].style.display = pairs[1];
+                    if (pairs[1] == "none"){
+                        var regex_id = /([_\\d]+)\$/;
+                        regex_id.exec(pairs[0]);
+                        document.getElementById("folding_btn"+RegExp.\$1).value = "Show";
+                    }
+                }
+            }
+        }
+    }
+
+    function getTagList () {
+
+        var stringToSearch = document.lonhomework.innerHTML;
+
+        var ret = new Array();
+        var regex_findBlock = /(foldblock_.*?)"/g;
+        var tag_list = stringToSearch.match(regex_findBlock);
+
+        if(tag_list != null){
+            for(var i = 0; i < tag_list.length; i++){
+                ret.push(tag_list[i].replace(/"/, ''));
+            }
+        }
+        return ret;
+    }
+
+    function saveScrollPosition (resource) {
+        var tag_list = getTagList();
+
+        // we dont always want to jump to the first block
+        // 170 is roughly above the "Problem Editing" header. we just want to save if the user scrolled down further than this
+        if(\$(window).scrollTop() > 170){
+            if(tag_list != null){
+                var result;
+                for(var i = 0; i < tag_list.length; i++){
+                    if(isElementInViewport(tag_list[i])){
+                        result += tag_list[i]+';';
+                    }
+                }
+                sessionStorage.setItem('anchor_'+resource, result);
+            }
+        } else {
+            // we dont need to save zero, just delete the item to leave everything tidy
+            sessionStorage.removeItem('anchor_'+resource);
+        }
+    }
+
+    function restoreScrollPosition(resource){
+
+        var elem = sessionStorage.getItem('anchor_'+resource);
+        if(elem != null){
+            var tag_list = elem.split(';');
+            var elem_list;
+
+            for(var i = 0; i < tag_list.length; i++){
+                elem_list = document.getElementsByName(tag_list[i]);
+
+                if(elem_list.length > 0){
+                    elem = elem_list[0];
+                    break;
+                }
+            }
+            elem.scrollIntoView();
+        }
+    }
+
+    function isElementInViewport(el) {
+
+        // change to last element instead of first
+        var elem = document.getElementsByName(el);
+        var rect = elem[0].getBoundingClientRect();
+
+        return (
+            rect.top >= 0 &&
+            rect.left >= 0 &&
+            rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) && /*or $(window).height() */
+            rect.right <= (window.innerWidth || document.documentElement.clientWidth) /*or $(window).width() */
+        );
+    }
+
+    function autosize(depth){
+        var cmInst = window['cm'+depth];
+        var fitsizeButton = document.getElementById('fitsize'+depth);
+
+        // is fixed size, switching to dynamic
+        if (sessionStorage.getItem("autosized_"+depth) == null) {
+            cmInst.setSize("","auto");
+            fitsizeButton.value = "@{[&mt('Fixed size')]}";
+            sessionStorage.setItem("autosized_"+depth, "yes");
+
+        // is dynamic size, switching to fixed
+        } else {
+            cmInst.setSize("","300px");
+            fitsizeButton.value = "@{[&mt('Dynamic size')]}";
+            sessionStorage.removeItem("autosized_"+depth);
+        }
+    }
+
+
+
+// ]]>
+</script>
+COLORFULEDIT
+}
+
+sub xmleditor_js {
+    return <<XMLEDIT
+<script type="text/javascript" src="/adm/jQuery/addons/jquery-scrolltofixed.js"></script>
+<script type="text/javascript">
+// <![CDATA[>
+
+    function saveScrollPosition (resource) {
+
+        var scrollPos = \$(window).scrollTop();
+        sessionStorage.setItem(resource,scrollPos);
+    }
+
+    function restoreScrollPosition(resource){
+
+        var scrollPos = sessionStorage.getItem(resource);
+        \$(window).scrollTop(scrollPos);
+    }
+
+    // unless internet explorer
+    if (!(window.navigator.appName == "Microsoft Internet Explorer" && (document.documentMode || document.compatMode))){
+
+        \$(document).ready(function() {
+             \$(".LC_edit_actionbar").scrollToFixed(\{zIndex: 100\});
+        });
+    }
+
+    // inserts text at cursor position into codemirror (xml editor only)
+    function insertText(text){
+        cm.focus();
+        var curPos = cm.getCursor();
+        cm.replaceRange(text.replace(/ESCAPEDSCRIPT/g,'script'), {line: curPos.line,ch: curPos.ch});
+    }
+// ]]>
+</script>
+XMLEDIT
+}
+
+sub insert_folding_button {
+    my $curDepth = $Apache::lonxml::curdepth;
+    my $lastresource = $env{'request.ambiguous'};
+
+    return "<input type=\"button\" id=\"folding_btn_$curDepth\"
+            value=\"".&mt('Hide')."\" onclick=\"fold_box('$curDepth','$lastresource')\">";
+}
+
+
 =pod
 
 =head1 Excel and CSV file utility routines
@@ -1992,12 +2241,15 @@ sub multiple_select_form {
 
 =pod
 
-=item * &select_form($defdom,$name,$hashref,$onchange)
+=item * &select_form($defdom,$name,$hashref,$onchange,$readonly)
 
 Returns a string containing a <select name='$name' size='1'> form to 
 allow a user to select options from a ref to a hash containing:
 option_name => displayed text. An optional $onchange can include
-a javascript onchange item, e.g., onchange="this.form.submit();"  
+a javascript onchange item, e.g., onchange="this.form.submit();".
+An optional arg -- $readonly -- if true will cause the select form
+to be disabled, e.g., for the case where an instructor has a section-
+specific role, and is viewing/modifying parameters.  
 
 See lonrights.pm for an example invocation and use.
 
@@ -2005,12 +2257,16 @@ See lonrights.pm for an example invocati
 
 #-------------------------------------------
 sub select_form {
-    my ($def,$name,$hashref,$onchange) = @_;
+    my ($def,$name,$hashref,$onchange,$readonly) = @_;
     return unless (ref($hashref) eq 'HASH');
     if ($onchange) {
         $onchange = ' onchange="'.$onchange.'"';
     }
-    my $selectform = "<select name=\"$name\" size=\"1\"$onchange>\n";
+    my $disabled;
+    if ($readonly) {
+        $disabled = ' disabled="disabled"';
+    }
+    my $selectform = "<select name=\"$name\" size=\"1\"$onchange$disabled>\n";
     my @keys;
     if (exists($hashref->{'select_form_order'})) {
 	@keys=@{$hashref->{'select_form_order'}};
@@ -2179,7 +2435,7 @@ sub select_level_form {
 
 =pod
 
-=item * &select_dom_form($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms)
+=item * &select_dom_form($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms,$disabled)
 
 Returns a string containing a <select name='$name' size='1'> form to 
 allow a user to select the domain to preform an operation in.  
@@ -2194,16 +2450,21 @@ The optional $onchange argument specifie
 
 The optional $incdoms is a reference to an array of domains which will be the only available options.
 
-The optional $excdoms is a reference to an array of domains which will be excluded from the available options. 
+The optional $excdoms is a reference to an array of domains which will be excluded from the available options.
+
+The optional $disabled argument, if true, adds the disabled attribute to the select tag. 
 
 =cut
 
 #-------------------------------------------
 sub select_dom_form {
-    my ($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms) = @_;
+    my ($defdom,$name,$includeempty,$showdomdesc,$onchange,$incdoms,$excdoms,$disabled) = @_;
     if ($onchange) {
         $onchange = ' onchange="'.$onchange.'"';
     }
+    if ($disabled) {
+        $disabled = ' disabled="disabled"';
+    }
     my (@domains,%exclude);
     if (ref($incdoms) eq 'ARRAY') {
         @domains = sort {lc($a) cmp lc($b)} (@{$incdoms});
@@ -2214,7 +2475,7 @@ sub select_dom_form {
     if (ref($excdoms) eq 'ARRAY') {
         map { $exclude{$_} = 1; } @{$excdoms};
     }
-    my $selectdomain = "<select name=\"$name\" size=\"1\"$onchange>\n";
+    my $selectdomain = "<select name=\"$name\" size=\"1\"$onchange$disabled>\n";
     foreach my $dom (@domains) {
         next if ($exclude{$dom});
         $selectdomain.="<option value=\"$dom\" ".
@@ -2590,13 +2851,16 @@ sub authform_kerberos {
               @_,
               );
     my ($check4,$check5,$krbcheck,$krbarg,$krbver,$result,$authtype,
-        $autharg,$jscall);
+        $autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
     if ($in{'kerb_def_auth'} eq 'krb5') {
        $check5 = ' checked="checked"';
     } else {
        $check4 = ' checked="checked"';
     }
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     $krbarg = $in{'kerb_def_dom'};
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'krb') {
@@ -2641,7 +2905,7 @@ sub authform_kerberos {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="krb" />';
+                    $authtype = '<input type="radio" name="login" value="krb"'.$disabled.' />';
                 }
             }
         }
@@ -2650,7 +2914,7 @@ sub authform_kerberos {
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="krb" '.
                     'onclick="'.$jscall.'" onchange="'.$jscall.'"'.
-                    $krbcheck.' />';
+                    $krbcheck.$disabled.' />';
     }
     if (($can_assign{'krb4'} && $can_assign{'krb5'}) ||
         ($can_assign{'krb4'} && !$can_assign{'krb5'} &&
@@ -2663,9 +2927,9 @@ sub authform_kerberos {
          '<label>'.$authtype,
          '</label><input type="text" size="10" name="krbarg" '.
              'value="'.$krbarg.'" '.
-             'onchange="'.$jscall.'" />',
-         '<label><input type="radio" name="krbver" value="4" '.$check4.' />',
-         '</label><label><input type="radio" name="krbver" value="5" '.$check5.' />',
+             'onchange="'.$jscall.'"'.$disabled.' />',
+         '<label><input type="radio" name="krbver" value="4" '.$check4.$disabled.' />',
+         '</label><label><input type="radio" name="krbver" value="5" '.$check5.$disabled.' />',
 	 '</label>');
     } elsif ($can_assign{'krb4'}) {
         $result .= &mt
@@ -2674,7 +2938,7 @@ sub authform_kerberos {
          '<label>'.$authtype,
          '</label><input type="text" size="10" name="krbarg" '.
              'value="'.$krbarg.'" '.
-             'onchange="'.$jscall.'" />',
+             'onchange="'.$jscall.'"'.$disabled.' />',
          '<label><input type="hidden" name="krbver" value="4" />',
          '</label>');
     } elsif ($can_assign{'krb5'}) {
@@ -2684,7 +2948,7 @@ sub authform_kerberos {
          '<label>'.$authtype,
          '</label><input type="text" size="10" name="krbarg" '.
              'value="'.$krbarg.'" '.
-             'onchange="'.$jscall.'" />',
+             'onchange="'.$jscall.'"'.$disabled.' />',
          '<label><input type="hidden" name="krbver" value="5" />',
          '</label>');
     }
@@ -2697,8 +2961,11 @@ sub authform_internal {
                 kerb_def_dom => 'MSU.EDU',
                 @_,
                 );
-    my ($intcheck,$intarg,$result,$authtype,$autharg,$jscall);
+    my ($intcheck,$intarg,$result,$authtype,$autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'int') {
             if ($can_assign{'int'}) {
@@ -2727,7 +2994,7 @@ sub authform_internal {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="int" />';
+                    $authtype = '<input type="radio" name="login" value="int"'.$disabled.' />';
                 }
             }
         }
@@ -2735,14 +3002,14 @@ sub authform_internal {
     $jscall = "javascript:changed_radio('int',$in{'formname'});";
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="int" '.$intcheck.
-                    ' onchange="'.$jscall.'" onclick="'.$jscall.'" />';
+                    ' onchange="'.$jscall.'" onclick="'.$jscall.'"'.$disabled.' />';
     }
     $autharg = '<input type="password" size="10" name="intarg" value="'.
-               $intarg.'" onchange="'.$jscall.'" />';
+               $intarg.'" onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt
         ('[_1] Internally authenticated (with initial password [_2])',
          '<label>'.$authtype,'</label>'.$autharg);
-    $result.="<label><input type=\"checkbox\" name=\"visible\" onclick='if (this.checked) { this.form.intarg.type=\"text\" } else { this.form.intarg.type=\"password\" }' />".&mt('Visible input').'</label>';
+    $result.='<label><input type="checkbox" name="visible" onclick="if (this.checked) { this.form.intarg.type='."'text'".' } else { this.form.intarg.type='."'password'".' }"'.$disabled.' />'.&mt('Visible input').'</label>';
     return $result;
 }
 
@@ -2752,8 +3019,11 @@ sub authform_local {
               kerb_def_dom => 'MSU.EDU',
               @_,
               );
-    my ($loccheck,$locarg,$result,$authtype,$autharg,$jscall);
+    my ($loccheck,$locarg,$result,$authtype,$autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'loc') {
             if ($can_assign{'loc'}) {
@@ -2782,7 +3052,7 @@ sub authform_local {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="loc" />';
+                    $authtype = '<input type="radio" name="login" value="loc"'.$disabled.' />';
                 }
             }
         }
@@ -2791,10 +3061,10 @@ sub authform_local {
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="loc" '.
                     $loccheck.' onchange="'.$jscall.'" onclick="'.
-                    $jscall.'" />';
+                    $jscall.'"'.$disabled.' />';
     }
     $autharg = '<input type="text" size="10" name="locarg" value="'.
-               $locarg.'" onchange="'.$jscall.'" />';
+               $locarg.'" onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt('[_1] Local Authentication with argument [_2]',
                   '<label>'.$authtype,'</label>'.$autharg);
     return $result;
@@ -2806,8 +3076,11 @@ sub authform_filesystem {
               kerb_def_dom => 'MSU.EDU',
               @_,
               );
-    my ($fsyscheck,$result,$authtype,$autharg,$jscall);
+    my ($fsyscheck,$result,$authtype,$autharg,$jscall,$disabled);
     my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
     if (defined($in{'curr_authtype'})) {
         if ($in{'curr_authtype'} eq 'fsys') {
             if ($can_assign{'fsys'}) {
@@ -2833,7 +3106,7 @@ sub authform_filesystem {
         if (defined($in{'mode'})) {
             if ($in{'mode'} eq 'modifycourse') {
                 if ($authnum == 1) {
-                    $authtype = '<input type="radio" name="login" value="fsys" />';
+                    $authtype = '<input type="radio" name="login" value="fsys"'.$disabled.' />';
                 }
             }
         }
@@ -2842,16 +3115,16 @@ sub authform_filesystem {
     if ($authtype eq '') {
         $authtype = '<input type="radio" name="login" value="fsys" '.
                     $fsyscheck.' onchange="'.$jscall.'" onclick="'.
-                    $jscall.'" />';
+                    $jscall.'"'.$disabled.' />';
     }
     $autharg = '<input type="text" size="10" name="fsysarg" value=""'.
-               ' onchange="'.$jscall.'" />';
+               ' 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.'" />',
+         $fsyscheck.'onchange="'.$jscall.'" onclick="'.$jscall.'"'.$disabled.' />',
          '</label><input type="password" size="10" name="fsysarg" value="" '.
-                  'onchange="'.$jscall.'" />');
+                  'onchange="'.$jscall.'"'.$disabled.' />');
     return $result;
 }
 
@@ -2873,7 +3146,7 @@ sub get_assignable_auth {
             my $context;
             if ($env{'request.role'} =~ /^au/) {
                 $context = 'author';
-            } elsif ($env{'request.role'} =~ /^dc/) {
+            } elsif ($env{'request.role'} =~ /^(dc|dh)/) {
                 $context = 'domain';
             } elsif ($env{'request.course.id'}) {
                 $context = 'course';
@@ -3721,8 +3994,13 @@ sub get_previous_attempt {
       my %lasthash=();
       my $version;
       for ($version=1;$version<=$returnhash{'version'};$version++) {
-        foreach my $key (sort(split(/\:/,$returnhash{$version.':keys'}))) {
-	  $lasthash{$key}=$returnhash{$version.':'.$key};
+        foreach my $key (reverse(sort(split(/\:/,$returnhash{$version.':keys'})))) {
+            if ($key =~ /\.rawrndseed$/) {
+                my ($id) = ($key =~ /^(.+)\.rawrndseed$/);
+                $lasthash{$id.'.rndseed'} = $returnhash{$version.':'.$key};
+            } else {
+                $lasthash{$key}=$returnhash{$version.':'.$key};
+            }
         }
       }
       $prevattempts=&start_data_table().&start_data_table_header_row();
@@ -3842,9 +4120,15 @@ sub get_previous_attempt {
                         }
                     } else {
                         if ($key =~ /\./) {
-                            my $value = &format_previous_attempt_value($key,
-                                              $returnhash{$version.':'.$key});
-                            $prevattempts.='<td>'.$value.'&nbsp;</td>';
+                            my $value = $returnhash{$version.':'.$key};
+                            if ($key =~ /\.rndseed$/) {
+                                my ($id) = ($key =~ /^(.+)\.rndseed$/);
+                                if (exists($returnhash{$version.':'.$id.'.rawrndseed'})) {
+                                    $value = $returnhash{$version.':'.$id.'.rawrndseed'};
+                                }
+                            }
+                            $prevattempts.='<td>'.&format_previous_attempt_value($key,$value).
+                                           '&nbsp;</td>';
                         } else {
                             $prevattempts.='<td>&nbsp;</td>';
                         }
@@ -3853,9 +4137,15 @@ sub get_previous_attempt {
             } else {
 	        foreach my $key (sort(keys(%lasthash))) {
                     next if ($key =~ /\.foilorder$/);
-		    my $value = &format_previous_attempt_value($key,
-			            $returnhash{$version.':'.$key});
-		    $prevattempts.='<td>'.$value.'&nbsp;</td>';
+                    my $value = $returnhash{$version.':'.$key};
+                    if ($key =~ /\.rndseed$/) {
+                        my ($id) = ($key =~ /^(.+)\.rndseed$/);
+                        if (exists($returnhash{$version.':'.$id.'.rawrndseed'})) {
+                            $value = $returnhash{$version.':'.$id.'.rawrndseed'};
+                        }
+                    }
+                    $prevattempts.='<td>'.&format_previous_attempt_value($key,$value).
+                                   '&nbsp;</td>';
 	        }
             }
 	    $prevattempts.=&end_data_table_row();
@@ -4412,7 +4702,7 @@ sub blockcheck {
                                                                 $tdom,$spec,$trest,$area);
                         }
                     }
-                    my ($author,$adv) = &Apache::lonnet::set_userprivs(\%userroles,\%allroles);
+                    my ($author,$adv,$rar) = &Apache::lonnet::set_userprivs(\%userroles,\%allroles);
                     if ($userroles{'user.priv.'.$checkrole} =~ /evb\&([^\:]*)/) {
                         if ($1) {
                             $no_userblock = 1;
@@ -4434,7 +4724,7 @@ sub blockcheck {
                  ($env{'request.role'} !~ m{^st\./\Q$cdom\E/\Q$cnum\E}));
         next if ($no_userblock);
 
-        # Retrieve blocking times and identity of locker for course
+        # Retrieve blocking times and identity of blocker for course
         # of specified user, unless user has 'evb' privilege.
         
         my ($start,$end,$trigger) = 
@@ -4610,9 +4900,9 @@ 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') {
-        $querystring .= "&amp;udom=$udom"      if $udom;
-        $querystring .= "&amp;uname=$uname"    if $uname;
+    if (($activity eq 'port') || ($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,'&"');
     }
@@ -4631,13 +4921,17 @@ END_MYBLOCK
   
     my $popupUrl = "/adm/blockingstatus/$querystring";
     my $text = &mt('Communication Blocked');
+    my $class = 'LC_comblock';
     if ($activity eq 'docs') {
         $text = &mt('Content Access Blocked');
+        $class = '';
     } elsif ($activity eq 'printout') {
         $text = &mt('Printing Blocked');
+    } elsif ($activity eq 'passwd') {
+        $text = &mt('Password Changing Blocked');
     }
     $output .= <<"END_BLOCK";
-<div class='LC_comblock'>
+<div class='$class'>
   <a onclick='openWindow("$popupUrl","Blocking Table",600,300,"no","no");return false;' href='/adm/blockingstatus/$querystring'
   title='$text'>
   <img class='LC_noBorder LC_middle' title='$text' src='/res/adm/pages/comblock.png' alt='$text'/></a>
@@ -4653,13 +4947,13 @@ END_BLOCK
 ###############################################
 
 sub check_ip_acc {
-    my ($acc)=@_;
+    my ($acc,$clientip)=@_;
     &Apache::lonxml::debug("acc is $acc");
     if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) {
         return 1;
     }
     my $allowed=0;
-    my $ip=$env{'request.host'} || $ENV{'REMOTE_ADDR'};
+    my $ip=$ENV{'REMOTE_ADDR'} || $clientip || $env{'request.host'};
 
     my $name;
     foreach my $pattern (split(',',$acc)) {
@@ -4844,7 +5138,7 @@ sub get_legacy_domconf {
     my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
     my $designfile =  $designdir.'/'.$udom.'.tab';
     if (-e $designfile) {
-        if ( open (my $fh,"<$designfile") ) {
+        if ( open (my $fh,'<',$designfile) ) {
             while (my $line = <$fh>) {
                 next if ($line =~ /^\#/);
                 chomp($line);
@@ -5100,9 +5394,6 @@ Inputs:
 
 =item * $args, optional argument valid values are
             no_auto_mt_title -> prevents &mt()ing the title arg
-            inherit_jsmath -> when creating popup window in a page,
-                              should it have jsmath forced on by the
-                              current page
 
 =item * $advtoolsref, optional argument, ref to an array containing
             inlineremote items to be added in "Functions" menu below
@@ -5155,6 +5446,14 @@ sub bodytag {
     if ($env{'request.course.id'}) {
         if ($env{'request.role'} !~ /^cr/) {
             $role = &Apache::lonnet::plaintext($role,&course_type());
+        } elsif ($role =~ m{^cr/($match_domain)/\1-domainconfig/(\w+)$}) {
+            if ($env{'request.role.desc'}) {
+                $role = $env{'request.role.desc'};
+            } else {
+                $role = &mt('Helpdesk[_1]','&nbsp;'.$2);
+            }
+        } else {
+            $role = (split(/\//,$role,4))[-1];
         }
         if ($env{'request.course.sec'}) {
             $role .= ('&nbsp;'x2).'-&nbsp;'.&mt('section:').'&nbsp;'.$env{'request.course.sec'};
@@ -5170,7 +5469,7 @@ sub bodytag {
 
 # construct main body tag
     my $bodytag = "<body $extra_body_attr>".
-	&Apache::lontexconvert::init_math_support($args->{'inherit_jsmath'});
+	&Apache::lontexconvert::init_math_support();
 
     &get_unprocessed_cgi($ENV{'QUERY_STRING'}, ['inhibitmenu']);
 
@@ -5194,7 +5493,7 @@ sub bodytag {
         $dc_info =~ s/\s+$//;
     }
 
-    $role = '<span class="LC_nobreak">('.$role.')</span>' if $role;
+    $role = '<span class="LC_nobreak">('.$role.')</span>' if ($role && !$env{'browser.mobile'});
 
     if ($env{'request.state'} eq 'construct') { $forcereg=1; }
 
@@ -5255,9 +5554,10 @@ sub bodytag {
             if ($env{'request.state'} eq 'construct') {
                 $bodytag .= &Apache::lonmenu::innerregister($forcereg,
                                 $args->{'bread_crumbs'});
-            } elsif ($forcereg) { 
+            } elsif ($forcereg) {
                 $bodytag .= &Apache::lonmenu::innerregister($forcereg,undef,
-                                                            $args->{'group'});
+                                                            $args->{'group'},
+                                                            $args->{'hide_buttons'});
             } else {
                 my $forbodytag;
                 &Apache::lonmenu::prepare_functions($env{'request.noversionuri'},
@@ -5397,7 +5697,6 @@ sub endbodytag {
     unless ((ref($args) eq 'HASH') && ($args->{'notbody'})) {
         $endbodytag='</body>';
     }
-    $endbodytag=&Apache::lontexconvert::jsMath_process()."\n".$endbodytag;
     if ( exists( $env{'internal.head.redirect'} ) ) {
         if (!(ref($args) eq 'HASH' && $args->{'noredirectlink'})) {
 	    $endbodytag=
@@ -5572,6 +5871,17 @@ div.LC_confirm_box .LC_success img {
   vertical-align: middle;
 }
 
+.LC_maxwidth {
+  max-width: 100%;
+  height: auto;
+}
+
+.LC_textsize_mobile {
+  \@media only screen and (max-device-width: 480px) {
+      -webkit-text-size-adjust:100%; -moz-text-size-adjust:100%; -ms-text-size-adjust:100%;
+  }
+}
+
 .LC_icon {
   border: none;
   vertical-align: middle;
@@ -5693,6 +6003,10 @@ table#LC_menubuttons img {
   vertical-align: middle;
 }
 
+.LC_breadcrumbs_hoverable {
+  background: $sidebg;
+}
+
 td.LC_table_cell_checkbox {
   text-align: center;
 }
@@ -6550,7 +6864,7 @@ div.LC_edit_problem_footer,
 div.LC_edit_problem_footer div,
 div.LC_edit_problem_editxml_header,
 div.LC_edit_problem_editxml_header div {
-  margin-top: 5px;
+  z-index: 100;
 }
 
 div.LC_edit_problem_header_title {
@@ -6566,14 +6880,17 @@ table.LC_edit_problem_header_title {
   background: $tabbg;
 }
 
-div.LC_edit_problem_discards {
-  float: left;
-  padding-bottom: 5px;
+div.LC_edit_actionbar {
+    background-color: $sidebg;
+    margin: 0;
+    padding: 0;
+    line-height: 200%;
 }
 
-div.LC_edit_problem_saves {
-  float: right;
-  padding-bottom: 5px;
+div.LC_edit_actionbar div{
+    padding: 0;
+    margin: 0;
+    display: inline-block;
 }
 
 .LC_edit_opt {
@@ -6589,6 +6906,10 @@ div.LC_edit_problem_saves {
     margin-left: 40px;
 }
 
+#LC_edit_problem_codemirror div{
+    margin-left: 0px;
+}
+
 img.stift {
   border-width: 0;
   vertical-align: middle;
@@ -6676,6 +6997,10 @@ fieldset {
   /* overflow: hidden; */
 }
 
+article.geogebraweb div {
+    margin: 0;
+}
+
 fieldset > legend {
   font-weight: bold;
   padding: 0 5px 0 5px;
@@ -6703,7 +7028,6 @@ fieldset > legend {
 ol.LC_primary_menu {
   margin: 0;
   padding: 0;
-  background-color: $pgbg_or_bgcolor;
 }
 
 ol#LC_PathBreadcrumbs {
@@ -6715,23 +7039,48 @@ ol.LC_primary_menu li {
   vertical-align: middle;
   text-align: left;
   list-style: none;
+  position: relative;
   float: left;
+  z-index: 100; /* will be displayed above codemirror and underneath the help-layer */
+  line-height: 1.5em;
 }
 
-ol.LC_primary_menu li a {
+ol.LC_primary_menu li a, 
+ol.LC_primary_menu li p {
   display: block;
   margin: 0;
   padding: 0 5px 0 10px;
   text-decoration: none;
 }
 
-ol.LC_primary_menu li ul {
+ol.LC_primary_menu li p span.LC_primary_menu_innertitle {
+  display: inline-block;
+  width: 95%;
+  text-align: left;
+}
+
+ol.LC_primary_menu li p span.LC_primary_menu_innerarrow {
+  display: inline-block;
+  width: 5%;
+  float: right;
+  text-align: right;
+  font-size: 70%;
+}
+
+ol.LC_primary_menu ul {
   display: none;
-  width: 10em;
+  width: 15em;
   background-color: $data_table_light;
+  position: absolute;
+  top: 100%;
 }
 
-ol.LC_primary_menu li:hover ul, ol.LC_primary_menu li.hover ul {
+ol.LC_primary_menu ul ul {
+  left: 100%;
+  top: 0;
+}
+
+ol.LC_primary_menu li:hover > ul, ol.LC_primary_menu li.hover > ul {
   display: block;
   position: absolute;
   margin: 0;
@@ -6740,15 +7089,21 @@ ol.LC_primary_menu li:hover ul, ol.LC_pr
 }
 
 ol.LC_primary_menu li:hover li, ol.LC_primary_menu li.hover li {
+/* First Submenu -> size should be smaller than the menu title of the whole menu */
   font-size: 90%;
   vertical-align: top;
   float: none;
   border-left: 1px solid black;
   border-right: 1px solid black;
+/* A dark bottom border to visualize different menu options;
+overwritten in the create_submenu routine for the last border-bottom of the menu */
+  border-bottom: 1px solid $data_table_dark;
 }
 
-ol.LC_primary_menu li:hover li a, ol.LC_primary_menu li.hover li a {
-  background-color:$data_table_light;
+ol.LC_primary_menu li li p:hover {
+  color:$button_hover;
+  text-decoration:none;
+  background-color:$data_table_dark;
 }
 
 ol.LC_primary_menu li li a:hover {
@@ -6756,6 +7111,11 @@ ol.LC_primary_menu li li a:hover {
    background-color:$data_table_dark;
 }
 
+/* Font-size equal to the size of the predecessors*/
+ol.LC_primary_menu li:hover li li {
+  font-size: 100%;
+}
+
 ol.LC_primary_menu li img {
   vertical-align: bottom;
   height: 1.1em;
@@ -6812,7 +7172,6 @@ ul#LC_secondary_menu li {
   font-weight: bold;
   line-height: 1.8em;
   border-right: 1px solid black;
-  vertical-align: middle;
   float: left;
 }
 
@@ -7319,6 +7678,39 @@ span.roman {font-family: serif; font-sty
 span.overacc2 {position: relative;  left: .8em; top: -1.2ex;}
 span.overacc1 {position: relative;  left: .6em; top: -1.2ex;}
 
+#LC_minitab_header {
+  float:left;
+  width:100%;
+  background:#DAE0D2 url("/res/adm/pages/minitabmenu_bg.gif") repeat-x bottom;
+  font-size:93%;
+  line-height:normal;
+  margin: 0.5em 0 0.5em 0;
+}
+#LC_minitab_header ul {
+  margin:0;
+  padding:10px 10px 0;
+  list-style:none;
+}
+#LC_minitab_header li {
+  float:left;
+  background:url("/res/adm/pages/minitabmenu_left.gif") no-repeat left top;
+  margin:0;
+  padding:0 0 0 9px;
+}
+#LC_minitab_header a {
+  display:block;
+  background:url("/res/adm/pages/minitabmenu_right.gif") no-repeat right top;
+  padding:5px 15px 4px 6px;
+}
+#LC_minitab_header #LC_current_minitab {
+  background-image:url("/res/adm/pages/minitabmenu_left_on.gif");
+}
+#LC_minitab_header #LC_current_minitab a {
+  background-image:url("/res/adm/pages/minitabmenu_right_on.gif");
+  padding-bottom:5px;
+}
+
+
 END
 }
 
@@ -7411,6 +7803,82 @@ sub headtag {
 <meta http-equiv="pragma" content="no-cache" />
 <meta http-equiv="Refresh" content="$time; url=$url" />
 ADDMETA
+    } else {
+        unless (($args->{'frameset'}) || ($args->{'js_ready'}) || ($args->{'only_body'}) || ($args->{'no_nav_bar'})) {
+            my $requrl = $env{'request.uri'};
+            if ($requrl eq '') {
+                $requrl = $ENV{'REQUEST_URI'};
+                $requrl =~ s/\?.+$//;
+            }
+            unless (($requrl =~ m{^/adm/(?:switchserver|login|authenticate|logout|groupsort|cleanup|helper|slotrequest|grades)(\?|$)}) ||
+                    (($requrl =~ m{^/res/}) && (($env{'form.submitted'} eq 'scantron') ||
+                     ($env{'form.grade_symb'}) || ($Apache::lonhomework::scantronmode)))) {
+                my $dom_in_use = $Apache::lonnet::perlvar{'lonDefDomain'};
+                unless (&Apache::lonnet::allowed('mau',$dom_in_use)) {
+                    my %domdefs = &Apache::lonnet::get_domain_defaults($dom_in_use);
+                    if (ref($domdefs{'offloadnow'}) eq 'HASH') {
+                        my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};
+                        if ($domdefs{'offloadnow'}{$lonhost}) {
+                            my $newserver = &Apache::lonnet::spareserver(30000,undef,1,$dom_in_use);
+                            if (($newserver) && ($newserver ne $lonhost)) {
+                                my $numsec = 5;
+                                my $timeout = $numsec * 1000;
+                                my ($newurl,$locknum,%locks,$msg);
+                                if ($env{'request.role.adv'}) {
+                                    ($locknum,%locks) = &Apache::lonnet::get_locks();
+                                }
+                                my $disable_submit = 0;
+                                if ($requrl =~ /$LONCAPA::assess_re/) {
+                                    $disable_submit = 1;
+                                }
+                                if ($locknum) {
+                                    my @lockinfo = sort(values(%locks));
+                                    $msg = &mt('Once the following tasks are complete: ')."\\n".
+                                           join(", ",sort(values(%locks)))."\\n".
+                                           &mt('your session will be transferred to a different server, after you click "Roles".');
+                                } else {
+                                    if (($requrl =~ m{^/res/}) && ($env{'form.submitted'} =~ /^part_/)) {
+                                        $msg = &mt('Your LON-CAPA submission has been recorded')."\\n";
+                                    }
+                                    $msg .= &mt('Your current LON-CAPA session will be transferred to a different server in [quant,_1,second].',$numsec);
+                                    $newurl = '/adm/switchserver?otherserver='.$newserver;
+                                    if (($env{'request.role'}) && ($env{'request.role'} ne 'cm')) {
+                                        $newurl .= '&role='.$env{'request.role'};
+                                    }
+                                    if ($env{'request.symb'}) {
+                                        $newurl .= '&symb='.$env{'request.symb'};
+                                    } else {
+                                        $newurl .= '&origurl='.$requrl;
+                                    }
+                                }
+                                &js_escape(\$msg);
+                                $result.=<<OFFLOAD
+<meta http-equiv="pragma" content="no-cache" />
+<script type="text/javascript">
+// <![CDATA[
+function LC_Offload_Now() {
+    var dest = "$newurl";
+    if (dest != '') {
+        window.location.href="$newurl";
+    }
+}
+\$(document).ready(function () {
+    window.alert('$msg');
+    if ($disable_submit) {
+        \$(".LC_hwk_submit").prop("disabled", true);
+        \$( ".LC_textline" ).prop( "readonly", "readonly");
+    }
+    setTimeout('LC_Offload_Now()', $timeout);
+});
+// ]]>
+</script>
+OFFLOAD
+                            }
+                        }
+                    }
+                }
+            }
+        }
     }
     if (!defined($title)) {
 	$title = 'The LearningOnline Network with CAPA';
@@ -7424,11 +7892,18 @@ ADDMETA
     $result .= '>'
         .$inhibitprint
 	.$head_extra;
-    if ($env{'browser.mobile'}) {
+    my $clientmobile;
+    if (($env{'user.name'} eq '') && ($env{'user.domain'} eq '')) {
+        (undef,undef,undef,undef,undef,undef,$clientmobile) = &decode_user_agent();
+    } else {
+        $clientmobile = $env{'browser.mobile'};
+    }
+    if ($clientmobile) {
         $result .= '
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0">
 <meta name="apple-mobile-web-app-capable" content="yes" />';
     }
+    $result .= '<meta name="google" content="notranslate" />'."\n";
     return $result.'</head>';
 }
 
@@ -7608,11 +8083,10 @@ $args - additional optional args support
              no_inline_link -> if true and in remote mode, don't show the
                                     'Switch To Inline Menu' link
              no_auto_mt_title -> prevent &mt()ing the title arg
-             inherit_jsmath -> when creating popup window in a page,
-                                    should it have jsmath forced on by the
-                                    current page
              bread_crumbs ->             Array containing breadcrumbs
              bread_crumbs_component ->  if exists show it as headline else show only the breadcrumbs
+             bread_crumbs_nomenu -> if true will pass false as the value of $menulink
+                                    to lonhtmlcommon::breadcrumbs
              group          -> includes the current group, if page is for a
                                specific group
 
@@ -7678,12 +8152,18 @@ sub start_page {
                 if (@advtools > 0) {
                     &Apache::lonmenu::advtools_crumbs(@advtools);
                 }
-
+                my $menulink;
+                # if arg: bread_crumbs_nomenu is true pass 0 as $menulink item.
+                if (exists($args->{'bread_crumbs_nomenu'})) {
+                    $menulink = 0;
+                } else {
+                    undef($menulink);
+                }
 		#if bread_crumbs_component exists show it as headline else show only the breadcrumbs
 		if(exists($args->{'bread_crumbs_component'})){
-			$result .= &Apache::lonhtmlcommon::breadcrumbs($args->{'bread_crumbs_component'});
+			$result .= &Apache::lonhtmlcommon::breadcrumbs($args->{'bread_crumbs_component'},'',$menulink);
 		}else{
-			$result .= &Apache::lonhtmlcommon::breadcrumbs();
+			$result .= &Apache::lonhtmlcommon::breadcrumbs('','',$menulink);
 		}
     } elsif (($env{'environment.remote'} eq 'on') &&
              ($env{'form.inhibitmenu'} ne 'yes') &&
@@ -7785,7 +8265,7 @@ var modalWindow = {
 };
 	var openMyModal = function(source,width,height,scrolling,transparency,style)
 	{
-                source = source.replace("'","&#39;");
+                source = source.replace(/'/g,"&#39;");
 		modalWindow.windowId = "myModal";
 		modalWindow.width = width;
 		modalWindow.height = height;
@@ -7914,8 +8394,9 @@ sub end_togglebox {
 }
 
 sub LCprogressbar_script {
-   my ($id)=@_;
-   return(<<ENDPROGRESS);
+   my ($id,$number_to_do)=@_;
+   if ($number_to_do) {
+       return(<<ENDPROGRESS);
 <script type="text/javascript">
 // <![CDATA[
 \$('#progressbar$id').progressbar({
@@ -7928,21 +8409,43 @@ sub LCprogressbar_script {
 // ]]>
 </script>
 ENDPROGRESS
+   } else {
+       return(<<ENDPROGRESS);
+<script type="text/javascript">
+// <![CDATA[
+\$('#progressbar$id').progressbar({
+  value: false,
+  create: function(event, ui) {
+    \$('.ui-widget-header', this).css({'background':'#F0F0F0'});
+    \$('.ui-progressbar-overlay', this).css({'margin':'0'});
+  }
+});
+// ]]>
+</script>
+ENDPROGRESS
+   }
 }
 
 sub LCprogressbarUpdate_script {
    return(<<ENDPROGRESSUPDATE);
 <style type="text/css">
 .ui-progressbar { position:relative; }
+.progress-label {position: absolute; width: 100%; text-align: center; top: 1px; font-weight: bold; text-shadow: 1px 1px 0 #fff;margin: 0; line-height: 200%; }
 .pblabel { position: absolute; width: 100%; text-align: center; line-height: 1.9em; }
 </style>
 <script type="text/javascript">
 // <![CDATA[
 var LCprogressTxt='---';
 
-function LCupdateProgress(percent,progresstext,id) {
+function LCupdateProgress(percent,progresstext,id,maxnum) {
    LCprogressTxt=progresstext;
-   \$('#progressbar'+id).progressbar('value',percent);
+   if ((maxnum == '') || (maxnum == undefined) || (maxnum == null)) {
+       \$('#progressbar'+id).find('.progress-label').text(LCprogressTxt);
+   } else if (percent === \$('#progressbar'+id).progressbar( "value" )) {
+       \$('#progressbar'+id).find('.pblabel').text(LCprogressTxt);
+   } else {
+       \$('#progressbar'+id).progressbar('value',percent);
+   }
 }
 // ]]>
 </script>
@@ -7954,37 +8457,54 @@ my $LCidcnt;
 my $LCcurrentid;
 
 sub LCprogressbar {
-    my ($r)=(@_);
+    my ($r,$number_to_do,$preamble)=@_;
     $LClastpercent=0;
     $LCidcnt++;
     $LCcurrentid=$$.'_'.$LCidcnt;
-    my $starting=&mt('Starting');
-    my $content=(<<ENDPROGBAR);
+    my ($starting,$content);
+    if ($number_to_do) {
+        $starting=&mt('Starting');
+        $content=(<<ENDPROGBAR);
+$preamble
   <div id="progressbar$LCcurrentid">
     <span class="pblabel">$starting</span>
   </div>
 ENDPROGBAR
-    &r_print($r,$content.&LCprogressbar_script($LCcurrentid));
+    } else {
+        $starting=&mt('Loading...');
+        $LClastpercent='false';
+        $content=(<<ENDPROGBAR);
+$preamble
+  <div id="progressbar$LCcurrentid">
+      <div class="progress-label">$starting</div>
+  </div>
+ENDPROGBAR
+    }
+    &r_print($r,$content.&LCprogressbar_script($LCcurrentid,$number_to_do));
 }
 
 sub LCprogressbarUpdate {
-    my ($r,$val,$text)=@_;
-    unless ($val) { 
-       if ($LClastpercent) {
-           $val=$LClastpercent;
-       } else {
-           $val=0;
-       }
+    my ($r,$val,$text,$number_to_do)=@_;
+    if ($number_to_do) {
+        unless ($val) { 
+            if ($LClastpercent) {
+                $val=$LClastpercent;
+            } else {
+                $val=0;
+            }
+        }
+        if ($val<0) { $val=0; }
+        if ($val>100) { $val=0; }
+        $LClastpercent=$val;
+        unless ($text) { $text=$val.'%'; }
+    } else {
+        $val = 'false';
     }
-    if ($val<0) { $val=0; }
-    if ($val>100) { $val=0; }
-    $LClastpercent=$val;
-    unless ($text) { $text=$val.'%'; }
     $text=&js_ready($text);
     &r_print($r,<<ENDUPDATE);
 <script type="text/javascript">
 // <![CDATA[
-LCupdateProgress($val,'$text','$LCcurrentid');
+LCupdateProgress($val,'$text','$LCcurrentid','$number_to_do');
 // ]]>
 </script>
 ENDUPDATE
@@ -9101,8 +9621,24 @@ sub get_secgrprole_info {
 }
 
 sub user_picker {
-    my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context) = @_;
+    my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context,$fixeddom,$noinstd) = @_;
     my $currdom = $dom;
+    my @alldoms = &Apache::lonnet::all_domains();
+    if (@alldoms == 1) {
+        my %domsrch = &Apache::lonnet::get_dom('configuration',
+                                               ['directorysrch'],$alldoms[0]);
+        my $domdesc = &Apache::lonnet::domain($alldoms[0],'description');
+        my $showdom = $domdesc;
+        if ($showdom eq '') {
+            $showdom = $dom;
+        }
+        if (ref($domsrch{'directorysrch'}) eq 'HASH') {
+            if ((!$domsrch{'directorysrch'}{'available'}) &&
+                ($domsrch{'directorysrch'}{'lcavailable'} eq '0')) {
+                return (&mt('LON-CAPA directory search is not available in domain: [_1]',$showdom),0);
+            }
+        }
+    }
     my %curr_selected = (
                         srchin => 'dom',
                         srchby => 'lastname',
@@ -9123,7 +9659,7 @@ sub user_picker {
         }
         $srchterm = $srch->{'srchterm'};
     }
-    my %lt=&Apache::lonlocal::texthash(
+    my %html_lt=&Apache::lonlocal::texthash(
                     'usr'       => 'Search criteria',
                     'doma'      => 'Domain/institution to search',
                     'uname'     => 'username',
@@ -9136,6 +9672,8 @@ sub user_picker {
                     'exact'     => 'is',
                     'contains'  => 'contains',
                     'begins'    => 'begins with',
+                                       );
+    my %js_lt=&Apache::lonlocal::texthash(
                     'youm'      => "You must include some text to search for.",
                     'thte'      => "The text you are searching for must contain at least two characters when using a 'begins' type search.",
                     'thet'      => "The text you are searching for must contain at least three characters when using a 'contains' type search.",
@@ -9145,7 +9683,16 @@ sub user_picker {
                     'whse'      => "When searching by last,first you must include at least one character in the first name.",
                      'thfo'     => "The following need to be corrected before the search can be run:",
                                        );
-    my $domform = &select_dom_form($currdom,'srchdomain',1,1);
+    &html_escape(\%html_lt);
+    &js_escape(\%js_lt);
+    my $domform;
+    my $allow_blank = 1;
+    if ($fixeddom) {
+        $allow_blank = 0;
+        $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1,undef,[$currdom]);
+    } else {
+        $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1);
+    }
     my $srchinsel = ' <select name="srchin">';
 
     my @srchins = ('crs','dom','alc','instd');
@@ -9157,12 +9704,13 @@ sub user_picker {
         next if ($option eq 'alc');
         next if (($option eq 'crs') && ($env{'form.form'} eq 'requestcrs'));  
         next if ($option eq 'crs' && !$env{'request.course.id'});
+        next if (($option eq 'instd') && ($noinstd));
         if ($curr_selected{'srchin'} eq $option) {
             $srchinsel .= ' 
-   <option value="'.$option.'" selected="selected">'.$lt{$option}.'</option>';
+   <option value="'.$option.'" selected="selected">'.$html_lt{$option}.'</option>';
         } else {
             $srchinsel .= '
-   <option value="'.$option.'">'.$lt{$option}.'</option>';
+   <option value="'.$option.'">'.$html_lt{$option}.'</option>';
         }
     }
     $srchinsel .= "\n  </select>\n";
@@ -9171,10 +9719,10 @@ sub user_picker {
     foreach my $option ('lastname','lastfirst','uname') {
         if ($curr_selected{'srchby'} eq $option) {
             $srchbysel .= '
-   <option value="'.$option.'" selected="selected">'.$lt{$option}.'</option>';
+   <option value="'.$option.'" selected="selected">'.$html_lt{$option}.'</option>';
         } else {
             $srchbysel .= '
-   <option value="'.$option.'">'.$lt{$option}.'</option>';
+   <option value="'.$option.'">'.$html_lt{$option}.'</option>';
          }
     }
     $srchbysel .= "\n  </select>\n";
@@ -9183,10 +9731,10 @@ sub user_picker {
     foreach my $option ('begins','contains','exact') {
         if ($curr_selected{'srchtype'} eq $option) {
             $srchtypesel .= '
-   <option value="'.$option.'" selected="selected">'.$lt{$option}.'</option>';
+   <option value="'.$option.'" selected="selected">'.$html_lt{$option}.'</option>';
         } else {
             $srchtypesel .= '
-   <option value="'.$option.'">'.$lt{$option}.'</option>';
+   <option value="'.$option.'">'.$html_lt{$option}.'</option>';
         }
     }
     $srchtypesel .= "\n  </select>\n";
@@ -9271,46 +9819,46 @@ function validateEntry(callingForm) {
 
     if (srchterm == "") {
         checkok = 0;
-        msg += "$lt{'youm'}\\n";
+        msg += "$js_lt{'youm'}\\n";
     }
 
     if (srchtype== 'begins') {
         if (srchterm.length < 2) {
             checkok = 0;
-            msg += "$lt{'thte'}\\n";
+            msg += "$js_lt{'thte'}\\n";
         }
     }
 
     if (srchtype== 'contains') {
         if (srchterm.length < 3) {
             checkok = 0;
-            msg += "$lt{'thet'}\\n";
+            msg += "$js_lt{'thet'}\\n";
         }
     }
     if (srchin == 'instd') {
         if (srchdomain == '') {
             checkok = 0;
-            msg += "$lt{'yomc'}\\n";
+            msg += "$js_lt{'yomc'}\\n";
         }
     }
     if (srchin == 'dom') {
         if (srchdomain == '') {
             checkok = 0;
-            msg += "$lt{'ymcd'}\\n";
+            msg += "$js_lt{'ymcd'}\\n";
         }
     }
     if (srchby == 'lastfirst') {
         if (srchterm.indexOf(",") == -1) {
             checkok = 0;
-            msg += "$lt{'whus'}\\n";
+            msg += "$js_lt{'whus'}\\n";
         }
         if (srchterm.indexOf(",") == srchterm.length -1) {
             checkok = 0;
-            msg += "$lt{'whse'}\\n";
+            msg += "$js_lt{'whse'}\\n";
         }
     }
     if (checkok == 0) {
-        alert("$lt{'thfo'}\\n"+msg);
+        alert("$js_lt{'thfo'}\\n"+msg);
         return;
     }
     if (checkok == 1) {
@@ -9328,10 +9876,10 @@ $new_user_create
 END_BLOCK
 
     $output .= &Apache::lonhtmlcommon::start_pick_box().
-               &Apache::lonhtmlcommon::row_title($lt{'doma'}).
+               &Apache::lonhtmlcommon::row_title($html_lt{'doma'}).
                $domform.
                &Apache::lonhtmlcommon::row_closure().
-               &Apache::lonhtmlcommon::row_title($lt{'usr'}).
+               &Apache::lonhtmlcommon::row_title($html_lt{'usr'}).
                $srchbysel.
                $srchtypesel. 
                '<input type="text" size="15" name="srchterm" value="'.$srchterm.'" />'.
@@ -9339,61 +9887,165 @@ END_BLOCK
                &Apache::lonhtmlcommon::row_closure(1). 
                &Apache::lonhtmlcommon::end_pick_box().
                '<br />';
-    return $output;
+    return ($output,1);
 }
 
 sub user_rule_check {
     my ($usershash,$checks,$alerts,$rulematch,$inst_results,$curr_rules,$got_rules) = @_;
-    my $response;
+    my ($response,%inst_response);
     if (ref($usershash) eq 'HASH') {
-        foreach my $user (keys(%{$usershash})) {
-            my ($uname,$udom) = split(/:/,$user);
-            next if ($udom eq '' || $uname eq '');
-            my ($id,$newuser);
-            if (ref($usershash->{$user}) eq 'HASH') {
-                $newuser = $usershash->{$user}->{'newuser'};
-                $id = $usershash->{$user}->{'id'};
-            }
-            my $inst_response;
+        if (keys(%{$usershash}) > 1) {
+            my (%by_username,%by_id,%userdoms);
+            my $checkid;
             if (ref($checks) eq 'HASH') {
-                if (defined($checks->{'username'})) {
-                    ($inst_response,%{$inst_results->{$user}}) = 
-                        &Apache::lonnet::get_instuser($udom,$uname);
-                } elsif (defined($checks->{'id'})) {
-                    ($inst_response,%{$inst_results->{$user}}) =
-                        &Apache::lonnet::get_instuser($udom,undef,$id);
+                if ((!defined($checks->{'username'})) && (defined($checks->{'id'}))) {
+                    $checkid = 1;
+                }
+            }
+            foreach my $user (keys(%{$usershash})) {
+                my ($uname,$udom) = split(/:/,$user);
+                if ($checkid) {
+                    if (ref($usershash->{$user}) eq 'HASH') {
+                        if ($usershash->{$user}->{'id'} ne '') {
+                            $by_id{$udom}{$usershash->{$user}->{'id'}} = $uname;
+                            $userdoms{$udom} = 1;
+                            if (ref($inst_results) eq 'HASH') {
+                                $inst_results->{$uname.':'.$udom} = {};
+                            }
+                        }
+                    }
+                } else {
+                    $by_username{$udom}{$uname} = 1;
+                    $userdoms{$udom} = 1;
+                    if (ref($inst_results) eq 'HASH') {
+                        $inst_results->{$uname.':'.$udom} = {};
+                    }
+                }
+            }
+            foreach my $udom (keys(%userdoms)) {
+                if (!$got_rules->{$udom}) {
+                    my %domconfig = &Apache::lonnet::get_dom('configuration',
+                                                             ['usercreation'],$udom);
+                    if (ref($domconfig{'usercreation'}) eq 'HASH') {
+                        foreach my $item ('username','id') {
+                            if (ref($domconfig{'usercreation'}{$item.'_rule'}) eq 'ARRAY') {
+                                $$curr_rules{$udom}{$item} =
+                                    $domconfig{'usercreation'}{$item.'_rule'};
+                            }
+                        }
+                    }
+                    $got_rules->{$udom} = 1;
+                }
+            }
+            if ($checkid) {
+                foreach my $udom (keys(%by_id)) {
+                    my ($outcome,$results) = &Apache::lonnet::get_multiple_instusers($udom,$by_id{$udom},'id');
+                    if ($outcome eq 'ok') {
+                        foreach my $id (keys(%{$by_id{$udom}})) {
+                            my $uname = $by_id{$udom}{$id};
+                            $inst_response{$uname.':'.$udom} = $outcome;
+                        }
+                        if (ref($results) eq 'HASH') {
+                            foreach my $uname (keys(%{$results})) {
+                                if (exists($inst_response{$uname.':'.$udom})) {
+                                    $inst_response{$uname.':'.$udom} = $outcome;
+                                    $inst_results->{$uname.':'.$udom} = $results->{$uname};
+                                }
+                            }
+                        }
+                    }
                 }
             } else {
-                ($inst_response,%{$inst_results->{$user}}) =
-                    &Apache::lonnet::get_instuser($udom,$uname);
-                return;
+                foreach my $udom (keys(%by_username)) {
+                    my ($outcome,$results) = &Apache::lonnet::get_multiple_instusers($udom,$by_username{$udom});
+                    if ($outcome eq 'ok') {
+                        foreach my $uname (keys(%{$by_username{$udom}})) {
+                            $inst_response{$uname.':'.$udom} = $outcome;
+                        }
+                        if (ref($results) eq 'HASH') {
+                            foreach my $uname (keys(%{$results})) {
+                                $inst_results->{$uname.':'.$udom} = $results->{$uname};
+                            }
+                        }
+                    }
+                }
             }
-            if (!$got_rules->{$udom}) {
-                my %domconfig = &Apache::lonnet::get_dom('configuration',
-                                                  ['usercreation'],$udom);
-                if (ref($domconfig{'usercreation'}) eq 'HASH') {
-                    foreach my $item ('username','id') {
-                        if (ref($domconfig{'usercreation'}{$item.'_rule'}) eq 'ARRAY') {
-                            $$curr_rules{$udom}{$item} = 
-                                $domconfig{'usercreation'}{$item.'_rule'};
+        } elsif (keys(%{$usershash}) == 1) {
+            my $user = (keys(%{$usershash}))[0];
+            my ($uname,$udom) = split(/:/,$user);
+            if (($udom ne '') && ($uname ne '')) {
+                if (ref($usershash->{$user}) eq 'HASH') {
+                    if (ref($checks) eq 'HASH') {
+                        if (defined($checks->{'username'})) {
+                            ($inst_response{$user},%{$inst_results->{$user}}) =
+                                &Apache::lonnet::get_instuser($udom,$uname);
+                        } elsif (defined($checks->{'id'})) {
+                            if ($usershash->{$user}->{'id'} ne '') {
+                                ($inst_response{$user},%{$inst_results->{$user}}) =
+                                    &Apache::lonnet::get_instuser($udom,undef,
+                                                                  $usershash->{$user}->{'id'});
+                            } else {
+                                ($inst_response{$user},%{$inst_results->{$user}}) =
+                                    &Apache::lonnet::get_instuser($udom,$uname);
+                            }
+                        }
+                    } else {
+                       ($inst_response{$user},%{$inst_results->{$user}}) =
+                            &Apache::lonnet::get_instuser($udom,$uname);
+                       return;
+                    }
+                    if (!$got_rules->{$udom}) {
+                        my %domconfig = &Apache::lonnet::get_dom('configuration',
+                                                                 ['usercreation'],$udom);
+                        if (ref($domconfig{'usercreation'}) eq 'HASH') {
+                            foreach my $item ('username','id') {
+                                if (ref($domconfig{'usercreation'}{$item.'_rule'}) eq 'ARRAY') {
+                                   $$curr_rules{$udom}{$item} =
+                                       $domconfig{'usercreation'}{$item.'_rule'};
+                                }
+                            }
                         }
+                        $got_rules->{$udom} = 1;
                     }
                 }
-                $got_rules->{$udom} = 1;  
+            } else {
+                return;
+            }
+        } else {
+            return;
+        }
+        foreach my $user (keys(%{$usershash})) {
+            my ($uname,$udom) = split(/:/,$user);
+            next if (($udom eq '') || ($uname eq ''));
+            my $id;
+            if (ref($inst_results) eq 'HASH') {
+                if (ref($inst_results->{$user}) eq 'HASH') {
+                    $id = $inst_results->{$user}->{'id'};
+                }
+            }
+            if ($id eq '') {
+                if (ref($usershash->{$user})) {
+                    $id = $usershash->{$user}->{'id'};
+                }
             }
             foreach my $item (keys(%{$checks})) {
                 if (ref($$curr_rules{$udom}) eq 'HASH') {
                     if (ref($$curr_rules{$udom}{$item}) eq 'ARRAY') {
                         if (@{$$curr_rules{$udom}{$item}} > 0) {
-                            my %rule_check = &Apache::lonnet::inst_rulecheck($udom,$uname,$id,$item,$$curr_rules{$udom}{$item});
+                            my %rule_check = &Apache::lonnet::inst_rulecheck($udom,$uname,$id,$item,
+                                                                             $$curr_rules{$udom}{$item});
                             foreach my $rule (@{$$curr_rules{$udom}{$item}}) {
                                 if ($rule_check{$rule}) {
                                     $$rulematch{$user}{$item} = $rule;
-                                    if ($inst_response eq 'ok') {
+                                    if ($inst_response{$user} eq 'ok') {
                                         if (ref($inst_results) eq 'HASH') {
                                             if (ref($inst_results->{$user}) eq 'HASH') {
                                                 if (keys(%{$inst_results->{$user}}) == 0) {
                                                     $$alerts{$item}{$udom}{$uname} = 1;
+                                                } elsif ($item eq 'id') {
+                                                    if ($inst_results->{$user}->{'id'} eq '') {
+                                                        $$alerts{$item}{$udom}{$uname} = 1;
+                                                    }
                                                 }
                                             }
                                         }
@@ -9550,7 +10202,7 @@ sub get_institutional_codes {
         foreach (@currxlists) {
             if (m/^([^:]+):(\w*)$/) {
                 unless (grep/^$1$/,@{$allcourses}) {
-                    push @{$allcourses},$1;
+                    push(@{$allcourses},$1);
                     $$LC_code{$1} = $2;
                 }
             }
@@ -9563,7 +10215,7 @@ sub get_institutional_codes {
                 my $sec = $coursecode.$1;
                 my $lc_sec = $2;
                 unless (grep/^$sec$/,@{$allcourses}) {
-                    push @{$allcourses},$sec;
+                    push(@{$allcourses},$sec);
                     $$LC_code{$sec} = $lc_sec;
                 }
             }
@@ -9661,7 +10313,9 @@ reservable_now - ref to hash of student_
 
     Keys in inner hash are:
     (a) symb: either blank or symb to which slot use is restricted.
-    (b) endreserve: end date of reservation period. 
+    (b) endreserve: end date of reservation period.
+    (c) uniqueperiod: start,end dates when slot is to be uniquely
+        selected.
 
 sorted_future - ref to array of student_schedulable slots reservable in
                 the future, ordered by start date of reservation period.
@@ -9672,6 +10326,8 @@ future_reservable - ref to hash of stude
     Keys in inner hash are:
     (a) symb: either blank or symb to which slot use is restricted.
     (b) startreserve:  start date of reservation period.
+    (c) uniqueperiod: start,end dates when slot is to be uniquely
+        selected.
 
 =back
 
@@ -9725,6 +10381,10 @@ sub get_future_slots {
             my $startreserve = $slots{$slot}->{'startreserve'};
             my $endreserve = $slots{$slot}->{'endreserve'};
             my $symb = $slots{$slot}->{'symb'};
+            my $uniqueperiod;
+            if (ref($slots{$slot}->{'uniqueperiod'}) eq 'ARRAY') {
+                $uniqueperiod = join(',',@{$slots{$slot}->{'uniqueperiod'}});
+            }
             if (($startreserve < $now) &&
                 (!$endreserve || $endreserve > $now)) {
                 my $lastres = $endreserve;
@@ -9733,13 +10393,15 @@ sub get_future_slots {
                 }
                 $reservable_now{$slot} = {
                                            symb       => $symb,
-                                           endreserve => $lastres
+                                           endreserve => $lastres,
+                                           uniqueperiod => $uniqueperiod,   
                                          };
             } elsif (($startreserve > $now) &&
                      (!$endreserve || $endreserve > $startreserve)) {
                 $future_reservable{$slot} = {
                                               symb         => $symb,
-                                              startreserve => $startreserve
+                                              startreserve => $startreserve,
+                                              uniqueperiod => $uniqueperiod,
                                             };
             }
         }
@@ -10804,7 +11466,7 @@ sub modify_html_refs {
                 return;
             }
         } 
-        if (open(my $fh,"<$container")) {
+        if (open(my $fh,'<',$container)) {
             $content = join('', <$fh>);
             close($fh);
         } else {
@@ -10869,7 +11531,7 @@ sub modify_html_refs {
                         }
                     }
                 } else {
-                    if (open(my $fh,">$container")) {
+                    if (open(my $fh,'>',$container)) {
                         print $fh $content;
                         close($fh);
                         $output = '<p>'.&mt('Updated [quant,_1,reference] in [_2].',
@@ -11386,6 +12048,18 @@ sub decompress_uploaded_file {
 
 sub process_decompression {
     my ($docudom,$docuname,$file,$destination,$dir_root,$hiddenelem) = @_;
+    unless (($dir_root eq '/userfiles') && ($destination =~ m{^(docs|supplemental)/(default|\d+)/\d+$})) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Unexpected file path.').'</p>'."\n";
+    }
+    unless (($docudom =~ /^$match_domain$/) && ($docuname =~ /^$match_courseid$/)) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Unexpected course context.').'</p>'."\n";
+    }
+    unless ($file eq &Apache::lonnet::clean_filename($file)) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Filename contained unexpected characters.').'</p>'."\n";
+    }
     my ($dir,$error,$warning,$output);
     if ($file !~ /\.(zip|tar|bz2|gz|tar.gz|tar.bz2|tgz)$/i) {
         $error = &mt('Filename not a supported archive file type.').
@@ -11420,30 +12094,44 @@ sub process_decompression {
                 }
             }
             my $numskip = scalar(@to_skip);
-            if (($numskip > 0) && 
-                ($numskip == $env{'form.archive_itemcount'})) {
+            my $numoverwrite = scalar(@to_overwrite);
+            if (($numskip) && (!$numoverwrite)) {
                 $warning = &mt('All items in the archive file already exist, and no overwriting of existing files has been requested.');         
             } elsif ($dir eq '') {
                 $error = &mt('Directory containing archive file unavailable.');
             } elsif (!$error) {
                 my ($decompressed,$display);
-                if ($numskip > 0) {
+                if (($numskip) || ($numoverwrite)) {
                     my $tempdir = time.'_'.$$.int(rand(10000));
                     mkdir("$dir/$tempdir",0755);
-                    system("mv $dir/$file $dir/$tempdir/$file");
-                    ($decompressed,$display) = 
-                        &decompress_uploaded_file($file,"$dir/$tempdir");
-                    foreach my $item (@to_skip) {
-                        if (($item ne '') && ($item !~ /\.\./)) {
-                            if (-f "$dir/$tempdir/$item") { 
-                                unlink("$dir/$tempdir/$item");
-                            } elsif (-d "$dir/$tempdir/$item") {
-                                system("rm -rf $dir/$tempdir/$item");
+                    if (&File::Copy::move("$dir/$file","$dir/$tempdir/$file")) {
+                        ($decompressed,$display) =
+                            &decompress_uploaded_file($file,"$dir/$tempdir");
+                        foreach my $item (@to_skip) {
+                            if (($item ne '') && ($item !~ /\.\./)) {
+                                if (-f "$dir/$tempdir/$item") {
+                                    unlink("$dir/$tempdir/$item");
+                                } elsif (-d "$dir/$tempdir/$item") {
+                                    &File::Path::remove_tree("$dir/$tempdir/$item",{ safe => 1 });
+                                }
                             }
                         }
+                        foreach my $item (@to_overwrite) {
+                            if ((-e "$dir/$tempdir/$item") && (-e "$dir/$item")) {
+                                if (($item ne '') && ($item !~ /\.\./)) {
+                                    if (-f "$dir/$item") {
+                                        unlink("$dir/$item");
+                                    } elsif (-d "$dir/$item") {
+                                        &File::Path::remove_tree("$dir/$item",{ safe => 1 });
+                                    }
+                                    &File::Copy::move("$dir/$tempdir/$item","$dir/$item");
+                                }
+                            }
+                        }
+                        if (&File::Copy::move("$dir/$tempdir/$file","$dir/$file")) {
+                            &File::Path::remove_tree("$dir/$tempdir",{ safe => 1 });
+                        }
                     }
-                    system("mv $dir/$tempdir/* $dir");
-                    rmdir("$dir/$tempdir");   
                 } else {
                     ($decompressed,$display) = 
                         &decompress_uploaded_file($file,$dir);
@@ -11461,8 +12149,7 @@ sub process_decompression {
                     if (ref($newdirlistref) eq 'ARRAY') {
                         foreach my $dir_line (@{$newdirlistref}) {
                             my ($item,undef,undef,$testdir)=split(/\&/,$dir_line,5);
-                            unless (($item =~ /^\.+$/) || ($item eq $file) || 
-                                    ((@to_skip > 0) && (grep(/^\Q$item\E$/,@to_skip)))) {
+                            unless (($item =~ /^\.+$/) || ($item eq $file)) { 
                                 push(@newitems,$item);
                                 if ($dirptr&$testdir) {
                                     $is_dir{$item} = 1;
@@ -11947,7 +12634,7 @@ END
 sub process_extracted_files {
     my ($context,$docudom,$docuname,$destination,$dir_root,$hiddenelem) = @_;
     my $numitems = $env{'form.archive_count'};
-    return unless ($numitems);
+    return if ((!$numitems) || ($numitems =~ /\D/));
     my @ids=&Apache::lonnet::current_machine_ids();
     my ($prefix,$pathtocheck,$dir,$ishome,$error,$warning,%toplevelitems,%is_dir,
         %folders,%containers,%mapinner,%prompttofetch);
@@ -11960,7 +12647,7 @@ sub process_extracted_files {
     } else {
         $prefix = $Apache::lonnet::perlvar{'lonDocRoot'};
         $pathtocheck = "$dir_root/$docudom/$docuname/$destination";
-        $dir = "$dir_root/$docudom/$docuname";    
+        $dir = "$dir_root/$docudom/$docuname";
     }
     my $currdir = "$dir_root/$destination";
     (my $docstype,$mapinner{'0'}) = ($destination =~ m{^(docs|supplemental)/(\w+)/});
@@ -12049,7 +12736,9 @@ sub process_extracted_files {
                                                         '.'.$containers{$outer},1,1);
                             $newseqid{$i} = $newidx;
                             unless ($errtext) {
-                                $result .=  '<li>'.&mt('Folder: [_1] added to course',$docstitle).'</li>'."\n";
+                                $result .=  '<li>'.&mt('Folder: [_1] added to course',
+                                                       &HTML::Entities::encode($docstitle,'<>&"'))..
+                                            '</li>'."\n";
                             }
                         }
                     } else {
@@ -12058,38 +12747,47 @@ sub process_extracted_files {
                             my $url = '/uploaded/'.$docudom.'/'.$docuname.'/'.
                                       $docstype.'/'.$mapinner{$outer}.'/'.$newidx.'/'.
                                       $title;
-                            if (!-e "$prefix$dir/$docstype/$mapinner{$outer}") {
-                                mkdir("$prefix$dir/$docstype/$mapinner{$outer}",0755);
-                            }
-                            if (!-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
-                                mkdir("$prefix$dir/$docstype/$mapinner{$outer}/$newidx");
-                            }
-                            if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
-                                system("mv $prefix$path $prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title");
-                                $newdest{$i} = "$prefix$dir/$docstype/$mapinner{$outer}/$newidx";
-                                unless ($ishome) {
-                                    my $fetch = "$newdest{$i}/$title";
-                                    $fetch =~ s/^\Q$prefix$dir\E//;
-                                    $prompttofetch{$fetch} = 1;
+                            if (($outer !~ /\D/) && ($mapinner{$outer} !~ /\D/) && ($newidx !~ /\D/)) {
+                                if (!-e "$prefix$dir/$docstype/$mapinner{$outer}") {
+                                    mkdir("$prefix$dir/$docstype/$mapinner{$outer}",0755);
                                 }
-                            }
-                            $LONCAPA::map::resources[$newidx]=
-                                $docstitle.':'.$url.':false:normal:res';
-                            push(@LONCAPA::map::order, $newidx);
-                            my ($outtext,$errtext)=
-                                &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
-                                                        $docuname.'/'.$folders{$outer}.
-                                                        '.'.$containers{$outer},1,1);
-                            unless ($errtext) {
-                                if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title") {
-                                    $result .= '<li>'.&mt('File: [_1] added to course',$docstitle).'</li>'."\n";
+                                if (!-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
+                                    mkdir("$prefix$dir/$docstype/$mapinner{$outer}/$newidx");
+                                }
+                                if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
+                                    if (rename("$prefix$path","$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title")) {
+                                        $newdest{$i} = "$prefix$dir/$docstype/$mapinner{$outer}/$newidx";
+                                        unless ($ishome) {
+                                            my $fetch = "$newdest{$i}/$title";
+                                            $fetch =~ s/^\Q$prefix$dir\E//;
+                                            $prompttofetch{$fetch} = 1;
+                                        }
+                                   }
                                 }
+                                $LONCAPA::map::resources[$newidx]=
+                                    $docstitle.':'.$url.':false:normal:res';
+                                push(@LONCAPA::map::order, $newidx);
+                                my ($outtext,$errtext)=
+                                    &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
+                                                            $docuname.'/'.$folders{$outer}.
+                                                            '.'.$containers{$outer},1,1);
+                                unless ($errtext) {
+                                    if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title") {
+                                        $result .= '<li>'.&mt('File: [_1] added to course',
+                                                              &HTML::Entities::encode($docstitle,'<>&"')).
+                                                   '</li>'."\n";
+                                    }
+                                }
+                            } else {
+                                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',
+                                                &HTML::Entities::encode($path,'<>&"')).'<br />';
                             }
                         }
                     }
                 }
             } else {
-                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',$path).'<br />';
+                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',
+                                &HTML::Entities::encode($path,'<>&"')).'<br />';
             }
         }
         for (my $i=1; $i<=$numitems; $i++) {
@@ -12150,7 +12848,9 @@ sub process_extracted_files {
                         }
                         if ($fullpath ne '') {
                             if (-e "$prefix$path") {
-                                system("mv $prefix$path $fullpath/$title");
+                                unless (rename("$prefix$path","$fullpath/$title")) {
+                                     $warning .= &mt('Failed to rename dependency').'<br />';
+                                }
                             }
                             if (-e "$fullpath/$title") {
                                 my $showpath;
@@ -12159,21 +12859,26 @@ sub process_extracted_files {
                                 } else {
                                     $showpath = "/$title";
                                 }
-                                $result .= '<li>'.&mt('[_1] included as a dependency',$showpath).'</li>'."\n";
-                            }
-                            unless ($ishome) {
-                                my $fetch = "$fullpath/$title";
-                                $fetch =~ s/^\Q$prefix$dir\E//;
-                                $prompttofetch{$fetch} = 1;
+                                $result .= '<li>'.&mt('[_1] included as a dependency',
+                                                      &HTML::Entities::encode($showpath,'<>&"')).
+                                           '</li>'."\n";
+                                unless ($ishome) {
+                                    my $fetch = "$fullpath/$title";
+                                    $fetch =~ s/^\Q$prefix$dir\E//;
+                                    $prompttofetch{$fetch} = 1;
+                                }
                             }
                         }
                     }
                 } elsif ($env{'form.archive_'.$referrer{$i}} eq 'discard') {
                     $warning .= &mt('[_1] is a dependency of [_2], which was discarded.',
-                                    $path,$env{'form.archive_content_'.$referrer{$i}}).'<br />';
+                                    &HTML::Entities::encode($path,'<>&"'),
+                                    &HTML::Entities::encode($env{'form.archive_content_'.$referrer{$i}},'<>&"')).
+                                '<br />';
                 }
             } else {
-                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',$path).'<br />';
+                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',
+                                &HTML::Entities::encode($path)).'<br />';
             }
         }
         if (keys(%todelete)) {
@@ -12447,12 +13152,15 @@ sub upfile_store {
     $env{'form.upfile'}=~s/\n+/\n/gs;
     $env{'form.upfile'}=~s/\n+$//gs;
 
-    my $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
-	'_enroll_'.$env{'request.course.id'}.'_'.time.'_'.$$;
+    my $datatoken = &valid_datatoken($env{'user.name'}.'_'.$env{'user.domain'}.
+                                     '_enroll_'.$env{'request.course.id'}.'_'.
+                                     time.'_'.$$);
+    return if ($datatoken eq '');
+
     {
         my $datafile = $r->dir_config('lonDaemons').
                            '/tmp/'.$datatoken.'.tmp';
-        if ( open(my $fh,">$datafile") ) {
+        if ( open(my $fh,'>',$datafile) ) {
             print $fh $env{'form.upfile'};
             close($fh);
         }
@@ -12462,21 +13170,22 @@ sub upfile_store {
 
 =pod
 
-=item * &load_tmp_file($r)
+=item * &load_tmp_file($r,$datatoken)
 
 Load uploaded file from tmp, $r should be the HTTP Request object,
-needs $env{'form.datatoken'},
+$datatoken is the name to assign to the temporary file.
 sets $env{'form.upfile'} to the contents of the file
 
 =cut
 
 sub load_tmp_file {
-    my $r=shift;
+    my ($r,$datatoken) = @_;
+    return if ($datatoken eq '');
     my @studentdata=();
     {
         my $studentfile = $r->dir_config('lonDaemons').
-                              '/tmp/'.$env{'form.datatoken'}.'.tmp';
-        if ( open(my $fh,"<$studentfile") ) {
+                              '/tmp/'.$datatoken.'.tmp';
+        if ( open(my $fh,'<',$studentfile) ) {
             @studentdata=<$fh>;
             close($fh);
         }
@@ -12484,6 +13193,14 @@ sub load_tmp_file {
     $env{'form.upfile'}=join('',@studentdata);
 }
 
+sub valid_datatoken {
+    my ($datatoken) = @_;
+    if ($datatoken =~ /^$match_username\_$match_domain\_enroll_(|$match_domain\_$match_courseid)\_\d+_\d+$/) {
+        return $datatoken;
+    }
+    return;
+}
+
 =pod
 
 =item * &upfile_record_sep()
@@ -12924,7 +13641,7 @@ sub DrawBarGraph {
         @Labels = @$labels;
     } else {
         for (my $i=0;$i<@{$Values[0]};$i++) {
-            push (@Labels,$i+1);
+            push(@Labels,$i+1);
         }
     }
     #
@@ -13383,9 +14100,9 @@ Returns: comma separated list of address
 sub build_recipient_list {
     my ($defmail,$mailing,$defdom,$origmail) = @_;
     my @recipients;
-    my $otheremails;
+    my ($otheremails,$lastresort,$allbcc,$addtext);
     my %domconfig =
-         &Apache::lonnet::get_dom('configuration',['contacts'],$defdom);
+        &Apache::lonnet::get_dom('configuration',['contacts'],$defdom);
     if (ref($domconfig{'contacts'}) eq 'HASH') {
         if (exists($domconfig{'contacts'}{$mailing})) {
             if (ref($domconfig{'contacts'}{$mailing}) eq 'HASH') {
@@ -13397,14 +14114,96 @@ sub build_recipient_list {
                             push(@recipients,$addr);
                         }
                     }
-                    $otheremails = $domconfig{'contacts'}{$mailing}{'others'};
+                }
+                $otheremails = $domconfig{'contacts'}{$mailing}{'others'};
+                if ($mailing eq 'helpdeskmail') {
+                    if ($domconfig{'contacts'}{$mailing}{'bcc'}) {
+                        my @bccs = split(/,/,$domconfig{'contacts'}{$mailing}{'bcc'});
+                        my @ok_bccs;
+                        foreach my $bcc (@bccs) {
+                            $bcc =~ s/^\s+//g;
+                            $bcc =~ s/\s+$//g;
+                            if ($bcc =~ m/^[^\@]+\@[^\@]+$/) {
+                                if (!(grep(/^\Q$bcc\E$/,@ok_bccs))) {
+                                    push(@ok_bccs,$bcc);
+                                }
+                            }
+                        }
+                        if (@ok_bccs > 0) {
+                            $allbcc = join(', ',@ok_bccs);
+                        }
+                    }
+                    $addtext = $domconfig{'contacts'}{$mailing}{'include'};
                 }
             }
         } elsif ($origmail ne '') {
-            push(@recipients,$origmail);
+            $lastresort = $origmail;
         }
     } elsif ($origmail ne '') {
-        push(@recipients,$origmail);
+        $lastresort = $origmail;
+    }
+
+    if (($mailing eq 'helpdeskmail') && ($lastresort ne '')) {
+        unless (grep(/^\Q$defdom\E$/,&Apache::lonnet::current_machine_domains())) {
+            my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};
+            my $machinedom = $Apache::lonnet::perlvar{'lonDefDomain'};
+            my %what = (
+                          perlvar => 1,
+                       );
+            my $primary = &Apache::lonnet::domain($defdom,'primary');
+            if ($primary) {
+                my $gotaddr;
+                my ($result,$returnhash) =
+                    &Apache::lonnet::get_remote_globals($primary,{ perlvar => 1 });
+                if (($result eq 'ok') && (ref($returnhash) eq 'HASH')) {
+                    if ($returnhash->{'lonSupportEMail'} =~ /^[^\@]+\@[^\@]+$/) {
+                        $lastresort = $returnhash->{'lonSupportEMail'};
+                        $gotaddr = 1;
+                    }
+                }
+                unless ($gotaddr) {
+                    my $uintdom = &Apache::lonnet::internet_dom($primary);
+                    my $intdom = &Apache::lonnet::internet_dom($lonhost);
+                    unless ($uintdom eq $intdom) {
+                        my %domconfig =
+                            &Apache::lonnet::get_dom('configuration',['contacts'],$machinedom);
+                        if (ref($domconfig{'contacts'}) eq 'HASH') {
+                            if (ref($domconfig{'contacts'}{'otherdomsmail'}) eq 'HASH') {
+                                my @contacts = ('adminemail','supportemail');
+                                foreach my $item (@contacts) {
+                                    if ($domconfig{'contacts'}{'otherdomsmail'}{$item}) {
+                                        my $addr = $domconfig{'contacts'}{$item};
+                                        if (!grep(/^\Q$addr\E$/,@recipients)) {
+                                            push(@recipients,$addr);
+                                        }
+                                    }
+                                }
+                                if ($domconfig{'contacts'}{'otherdomsmail'}{'others'}) {
+                                    $otheremails = $domconfig{'contacts'}{'otherdomsmail'}{'others'};
+                                }
+                                if ($domconfig{'contacts'}{'otherdomsmail'}{'bcc'}) {
+                                    my @bccs = split(/,/,$domconfig{'contacts'}{'otherdomsmail'}{'bcc'});
+                                    my @ok_bccs;
+                                    foreach my $bcc (@bccs) {
+                                        $bcc =~ s/^\s+//g;
+                                        $bcc =~ s/\s+$//g;
+                                        if ($bcc =~ m/^[^\@]+\@[^\@]+$/) {
+                                            if (!(grep(/^\Q$bcc\E$/,@ok_bccs))) {
+                                                push(@ok_bccs,$bcc);
+                                            }
+                                        }
+                                    }
+                                    if (@ok_bccs > 0) {
+                                        $allbcc = join(', ',@ok_bccs);
+                                    }
+                                }
+                                $addtext = $domconfig{'contacts'}{'otherdomsmail'}{'include'};
+                            }
+                        }
+                    }
+                }
+            }
+        }
     }
     if (defined($defmail)) {
         if ($defmail ne '') {
@@ -13424,8 +14223,21 @@ sub build_recipient_list {
             }
         }
     }
-    my $recipientlist = join(',',@recipients); 
-    return $recipientlist;
+    if ($mailing eq 'helpdeskmail') {
+        if ((!@recipients) && ($lastresort ne '')) {
+            push(@recipients,$lastresort);
+        }
+    } elsif ($lastresort ne '') {
+        if (!grep(/^\Q$lastresort\E$/,@recipients)) {
+            push(@recipients,$lastresort);
+        }
+    }
+    my $recipientlist = join(',',@recipients);
+    if (wantarray) {
+        return ($recipientlist,$allbcc,$addtext);
+    } else {
+        return $recipientlist;
+    }
 }
 
 ############################################################
@@ -13649,12 +14461,15 @@ currcat - scalar with an & separated lis
 
 type    - scalar contains course type (Course or Community).
 
+disabled - scalar (optional) contains disabled="disabled" if input elements are
+           to be readonly (e.g., Domain Helpdesk role viewing course settings).
+
 Returns: $output (markup to be displayed) 
 
 =cut
 
 sub assign_categories_table {
-    my ($cathash,$currcat,$type) = @_;
+    my ($cathash,$currcat,$type,$disabled) = @_;
     my $output;
     if (ref($cathash) eq 'HASH') {
         my (@cats,@trails,%allitems,%idx,@jsarray,@path,$maxdepth);
@@ -13690,11 +14505,11 @@ sub assign_categories_table {
                     }
                     $table .= '<tr '.$css_class.'><td><span class="LC_nobreak">'.
                               '<input type="checkbox" name="usecategory" value="'.
-                              $item.'"'.$checked.' />'.$parent_title.'</span>'.
+                              $item.'"'.$checked.$disabled.' />'.$parent_title.'</span>'.
                               '<input type="hidden" name="catname" value="'.$parent.'" /></td>';
                     my $depth = 1;
                     push(@path,$parent);
-                    $table .= &assign_category_rows($itemcount,\@cats,$depth,$parent,\@path,\@currcategories);
+                    $table .= &assign_category_rows($itemcount,\@cats,$depth,$parent,\@path,\@currcategories,$disabled);
                     pop(@path);
                     $table .= '</tr><tr><td colspan="'.$maxdepth.'" class="LC_row_separator"></td></tr>';
                     $itemcount ++;
@@ -13733,12 +14548,15 @@ path - Array containing all categories b
 
 currcategories - reference to array of current categories assigned to the course
 
+disabled - scalar (optional) contains disabled="disabled" if input elements are
+           to be readonly (e.g., Domain Helpdesk role viewing course settings).
+
 Returns: $output (markup to be displayed).
 
 =cut
 
 sub assign_category_rows {
-    my ($itemcount,$cats,$depth,$parent,$path,$currcategories) = @_;
+    my ($itemcount,$cats,$depth,$parent,$path,$currcategories,$disabled) = @_;
     my ($text,$name,$item,$chgstr);
     if (ref($cats) eq 'ARRAY') {
         my $maxdepth = scalar(@{$cats});
@@ -13761,12 +14579,12 @@ sub assign_category_rows {
                     }
                     $text .= '<tr><td><span class="LC_nobreak"><label>'.
                              '<input type="checkbox" name="usecategory" value="'.
-                             $item.'"'.$checked.' />'.$name.'</label></span>'.
+                             $item.'"'.$checked.$disabled.' />'.$name.'</label></span>'.
                              '<input type="hidden" name="catname" value="'.$name.'" />'.
                              '</td><td>';
                     if (ref($path) eq 'ARRAY') {
                         push(@{$path},$name);
-                        $text .= &assign_category_rows($itemcount,$cats,$deeper,$name,$path,$currcategories);
+                        $text .= &assign_category_rows($itemcount,$cats,$deeper,$name,$path,$currcategories,$disabled);
                         pop(@{$path});
                     }
                     $text .= '</td></tr>';
@@ -13997,37 +14815,95 @@ sub check_clone {
                 return ($can_clone, $clonemsg, $cloneid, $clonehome);
             }
         }
-	if (($env{'request.role.domain'} eq $args->{'clonedomain'}) && 
+	if (($env{'request.role.domain'} eq $args->{'clonedomain'}) &&
             (&Apache::lonnet::allowed('ccc',$env{'request.role.domain'}))) {
 	    $can_clone = 1;
 	} else {
-	    my %clonehash = &Apache::lonnet::get('environment',['cloners'],
+	    my %clonehash = &Apache::lonnet::get('environment',['cloners','internal.coursecode'],
 						 $args->{'clonedomain'},$args->{'clonecourse'});
-	    my @cloners = split(/,/,$clonehash{'cloners'});
-            if (grep(/^\*$/,@cloners)) {
-                $can_clone = 1;
-            } elsif (grep(/^\*\:\Q$args->{'ccdomain'}\E$/,@cloners)) {
-                $can_clone = 1;
+            if ($clonehash{'cloners'} eq '') {
+                my %domdefs = &Apache::lonnet::get_domain_defaults($args->{'course_domain'});
+                if ($domdefs{'canclone'}) {
+                    unless ($domdefs{'canclone'} eq 'none') {
+                        if ($domdefs{'canclone'} eq 'domain') {
+                            if ($args->{'ccdomain'} eq $args->{'clonedomain'}) {
+                                $can_clone = 1;
+                            }
+                        } elsif (($clonehash{'internal.coursecode'}) && ($args->{'crscode'}) &&
+                                 ($args->{'clonedomain'} eq  $args->{'course_domain'})) {
+                            if (&Apache::lonnet::default_instcode_cloning($args->{'clonedomain'},$domdefs{'canclone'},
+                                                                          $clonehash{'internal.coursecode'},$args->{'crscode'})) {
+                                $can_clone = 1;
+                            }
+                        }
+                    }
+                }
             } else {
+	        my @cloners = split(/,/,$clonehash{'cloners'});
+                if (grep(/^\*$/,@cloners)) {
+                    $can_clone = 1;
+                } elsif (grep(/^\*\:\Q$args->{'ccdomain'}\E$/,@cloners)) {
+                    $can_clone = 1;
+                } elsif (grep(/^\Q$args->{'ccuname'}\E:\Q$args->{'ccdomain'}\E$/,@cloners)) {
+                    $can_clone = 1;
+                }
+                unless ($can_clone) {
+                    if (($clonehash{'internal.coursecode'}) && ($args->{'crscode'}) &&
+                        ($args->{'clonedomain'} eq  $args->{'course_domain'})) {
+                        my (%gotdomdefaults,%gotcodedefaults);
+                        foreach my $cloner (@cloners) {
+                            if (($cloner ne '*') && ($cloner !~ /^\*\:$match_domain$/) &&
+                                ($cloner !~ /^$match_username\:$match_domain$/) && ($cloner ne '')) {
+                                my (%codedefaults,@code_order);
+                                if (ref($gotcodedefaults{$args->{'clonedomain'}}) eq 'HASH') {
+                                    if (ref($gotcodedefaults{$args->{'clonedomain'}}{'defaults'}) eq 'HASH') {
+                                        %codedefaults = %{$gotcodedefaults{$args->{'clonedomain'}}{'defaults'}};
+                                    }
+                                    if (ref($gotcodedefaults{$args->{'clonedomain'}}{'order'}) eq 'ARRAY') {
+                                        @code_order = @{$gotcodedefaults{$args->{'clonedomain'}}{'order'}};
+                                    }
+                                } else {
+                                    &Apache::lonnet::auto_instcode_defaults($args->{'clonedomain'},
+                                                                            \%codedefaults,
+                                                                            \@code_order);
+                                    $gotcodedefaults{$args->{'clonedomain'}}{'defaults'} = \%codedefaults;
+                                    $gotcodedefaults{$args->{'clonedomain'}}{'order'} = \@code_order;
+                                }
+                                if (@code_order > 0) {
+                                    if (&Apache::lonnet::check_instcode_cloning(\%codedefaults,\@code_order,
+                                                                                $cloner,$clonehash{'internal.coursecode'},
+                                                                                $args->{'crscode'})) {
+                                        $can_clone = 1;
+                                        last;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            unless ($can_clone) {
                 my $ccrole = 'cc';
                 if ($args->{'crstype'} eq 'Community') {
                     $ccrole = 'co';
                 }
-	        my %roleshash =
-		    &Apache::lonnet::get_my_roles($args->{'ccuname'},
-					 $args->{'ccdomain'},
-                                         'userroles',['active'],[$ccrole],
-					 [$args->{'clonedomain'}]);
-	        if (($roleshash{$args->{'clonecourse'}.':'.$args->{'clonedomain'}.':'.$ccrole}) || (grep(/^\Q$args->{'ccuname'}\E:\Q$args->{'ccdomain'}\E$/,@cloners))) {
+                my %roleshash =
+                    &Apache::lonnet::get_my_roles($args->{'ccuname'},
+                                                  $args->{'ccdomain'},
+                                                  'userroles',['active'],[$ccrole],
+                                                  [$args->{'clonedomain'}]);
+                if ($roleshash{$args->{'clonecourse'}.':'.$args->{'clonedomain'}.':'.$ccrole}) {
                     $can_clone = 1;
-                } elsif (&Apache::lonnet::is_course_owner($args->{'clonedomain'},$args->{'clonecourse'},$args->{'ccuname'},$args->{'ccdomain'})) {
+                } elsif (&Apache::lonnet::is_course_owner($args->{'clonedomain'},$args->{'clonecourse'},
+                                                          $args->{'ccuname'},$args->{'ccdomain'})) {
                     $can_clone = 1;
+                }
+            }
+            unless ($can_clone) {
+                if ($args->{'crstype'} eq 'Community') {
+                    $clonemsg = &mt('No new community created.').$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'},$clonedesc{'description'});
                 } else {
-                    if ($args->{'crstype'} eq 'Community') {
-                        $clonemsg = &mt('No new community created.').$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 {
-                        $clonemsg = &mt('No new course created.').$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'});
-                    }
+                    $clonemsg = &mt('No new course created.').$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'});
 	        }
 	    }
         }
@@ -14036,7 +14912,8 @@ sub check_clone {
 }
 
 sub construct_course {
-    my ($args,$logmsg,$courseid,$crsudom,$crsunum,$udom,$uname,$context,$cnum,$category,$coderef) = @_;
+    my ($args,$logmsg,$courseid,$crsudom,$crsunum,$udom,$uname,$context,
+        $cnum,$category,$coderef) = @_;
     my $outcome;
     my $linefeed =  '<br />'."\n";
     if ($context eq 'auto') {
@@ -14184,7 +15061,7 @@ sub construct_course {
                 my $addcheck = &Apache::lonnet::auto_new_course($$crsunum,$$crsudom,$class,$cenv{'internal.courseowner'});
                 $cenv{'internal.sectionnums'} .= $item.',';
                 unless ($addcheck eq 'ok') {
-                    push @badclasses, $class;
+                    push(@badclasses,$class);
                 }
             }
             $cenv{'internal.sectionnums'} =~ s/,$//;
@@ -14212,7 +15089,7 @@ sub construct_course {
                 my $addcheck =  &Apache::lonnet::auto_new_course($$crsunum,$$crsudom,$xl,$cenv{'internal.courseowner'});
                 $cenv{'internal.crosslistings'} .= $item.',';
                 unless ($addcheck eq 'ok') {
-                    push @badclasses, $xl;
+                    push(@badclasses,$xl);
                 }
             }
             $cenv{'internal.crosslistings'} =~ s/,$//;
@@ -14247,28 +15124,29 @@ sub construct_course {
     }
     if (@badclasses > 0) {
         my %lt=&Apache::lonlocal::texthash(
-                'tclb' => 'The courses listed below were included as sections or crosslistings affiliated with your new LON-CAPA course.  However, if automated course roster updates are enabled for this class, these particular sections/crosslistings will not contribute towards enrollment, because the user identified as the course owner for this LON-CAPA course',
-                'dnhr' => 'does not have rights to access enrollment in these classes',
-                'adby' => 'as determined by the policies of your institution on access to official classlists'
+                'tclb' => 'The courses listed below were included as sections or crosslistings affiliated with your new LON-CAPA course.',
+                'howi' => 'However, if automated course roster updates are enabled for this class, these particular sections/crosslistings are not guaranteed to contribute towards enrollment.',
+                'itis' => 'It is possible that rights to access enrollment for these classes will be available through assignment of co-owners.',
         );
-        my $badclass_msg = $cenv{'internal.courseowner'}.') - '.$lt{'dnhr'}.
-                           ' ('.$lt{'adby'}.')';
+        my $badclass_msg = $lt{'tclb'}.$linefeed.$lt{'howi'}.$linefeed.
+                           &mt('That is because the user identified as the course owner ([_1]) does not have rights to access enrollment in these classes, as determined by the policies of your institution on access to official classlists',$cenv{'internal.courseowner'}).$linefeed.$lt{'itis'};
         if ($context eq 'auto') {
             $outcome .= $badclass_msg.$linefeed;
+        } else {
             $outcome .= '<div class="LC_warning">'.$badclass_msg.$linefeed.'<ul>'."\n";
-            foreach my $item (@badclasses) {
-                if ($context eq 'auto') {
-                    $outcome .= " - $item\n";
-                } else {
-                    $outcome .= "<li>$item</li>\n";
-                }
-            }
+        }
+        foreach my $item (@badclasses) {
             if ($context eq 'auto') {
-                $outcome .= $linefeed;
+                $outcome .= " - $item\n";
             } else {
-                $outcome .= "</ul><br /><br /></div>\n";
+                $outcome .= "<li>$item</li>\n";
             }
-        } 
+        }
+        if ($context eq 'auto') {
+            $outcome .= $linefeed;
+        } else {
+            $outcome .= "</ul><br /><br /></div>\n";
+        }
     }
     if ($args->{'no_end_date'}) {
         $args->{'endaccess'} = 0;
@@ -14300,6 +15178,9 @@ sub construct_course {
        if ($args->{'setcontent'}) {
            $cenv{'question.email'}=$args->{'ccuname'}.':'.$args->{'ccdomain'};
        }
+       if ($args->{'setcomment'}) {
+           $cenv{'comment.email'}=$args->{'ccuname'}.':'.$args->{'ccdomain'};
+       }
     }
     if ($args->{'reshome'}) {
 	$cenv{'reshome'}=$args->{'reshome'}.'/';
@@ -14698,36 +15579,44 @@ sub init_user_environment {
             $env{'user.noloadbalance'} = $lonhost;
         }
 
-        my %is_adv = ( is_adv => $env{'user.adv'} );
-        my %domdef;
-        unless ($domain eq 'public') {
-            %domdef = &Apache::lonnet::get_domain_defaults($domain);
+        if ($form->{'noloadbalance'}) {
+            my @hosts = &Apache::lonnet::current_machine_ids();
+            my $hosthere = $form->{'noloadbalance'};
+            if (grep(/^\Q$hosthere\E$/,@hosts)) {
+                $initial_env{"user.noloadbalance"} = $hosthere;
+                $env{'user.noloadbalance'} = $hosthere;
+            }
         }
 
-        foreach my $tool ('aboutme','blog','webdav','portfolio') {
-            $userenv{'availabletools.'.$tool} = 
-                &Apache::lonnet::usertools_access($username,$domain,$tool,'reload',
-                                                  undef,\%userenv,\%domdef,\%is_adv);
-        }
+        unless ($domain eq 'public') {
+            my %is_adv = ( is_adv => $env{'user.adv'} );
+            my %domdef = &Apache::lonnet::get_domain_defaults($domain);
 
-        foreach my $crstype ('official','unofficial','community','textbook') {
-            $userenv{'canrequest.'.$crstype} =
-                &Apache::lonnet::usertools_access($username,$domain,$crstype,
-                                                  'reload','requestcourses',
-                                                  \%userenv,\%domdef,\%is_adv);
-        }
+            foreach my $tool ('aboutme','blog','webdav','portfolio') {
+                $userenv{'availabletools.'.$tool} = 
+                    &Apache::lonnet::usertools_access($username,$domain,$tool,'reload',
+                                                      undef,\%userenv,\%domdef,\%is_adv);
+            }
 
-        $userenv{'canrequest.author'} =
-            &Apache::lonnet::usertools_access($username,$domain,'requestauthor',
-                                        'reload','requestauthor',
-                                        \%userenv,\%domdef,\%is_adv);
-        my %reqauthor = &Apache::lonnet::get('requestauthor',['author_status','author'],
-                                             $domain,$username);
-        my $reqstatus = $reqauthor{'author_status'};
-        if ($reqstatus eq 'approval' || $reqstatus eq 'approved') {
-            if (ref($reqauthor{'author'}) eq 'HASH') {
-                $userenv{'requestauthorqueued'} = $reqstatus.':'.
-                                                  $reqauthor{'author'}{'timestamp'};
+            foreach my $crstype ('official','unofficial','community','textbook') {
+                $userenv{'canrequest.'.$crstype} =
+                    &Apache::lonnet::usertools_access($username,$domain,$crstype,
+                                                      'reload','requestcourses',
+                                                      \%userenv,\%domdef,\%is_adv);
+            }
+
+            $userenv{'canrequest.author'} =
+                &Apache::lonnet::usertools_access($username,$domain,'requestauthor',
+                                                  'reload','requestauthor',
+                                                  \%userenv,\%domdef,\%is_adv);
+            my %reqauthor = &Apache::lonnet::get('requestauthor',['author_status','author'],
+                                                 $domain,$username);
+            my $reqstatus = $reqauthor{'author_status'};
+            if ($reqstatus eq 'approval' || $reqstatus eq 'approved') {
+                if (ref($reqauthor{'author'}) eq 'HASH') {
+                    $userenv{'requestauthorqueued'} = $reqstatus.':'.
+                                                      $reqauthor{'author'}{'timestamp'};
+                }
             }
         }
 
@@ -15241,11 +16130,18 @@ cloneruname - optional username of new c
 
 clonerudom - optional domain of new course owner
 
-domcloner - Optional "domcloner" flag; has value=1 if user has ccc priv in domain being filtered by,
+domcloner - optional "domcloner" flag; has value=1 if user has ccc priv in domain being filtered by,
             (used when DC is using course creation form)
 
 codetitles - reference to array of titles of components in institutional codes (official courses).
 
+cc_clone - escaped comma separated list of courses for which course cloner has active CC role
+           (and so can clone automatically)
+
+reqcrsdom - domain of new course, where search_courses is used to identify potential courses to clone
+
+reqinstcode - institutional code of new course, where search_courses is used to identify potential
+              courses to clone
 
 Returns: %courses - hash of courses satisfying search criteria, keys = course IDs, values are corresponding colon-separated escaped description, institutional code, owner and type.
 
@@ -15256,7 +16152,8 @@ Side Effects: None
 
 
 sub search_courses {
-    my ($dom,$type,$filter,$numtitles,$cloneruname,$clonerudom,$domcloner,$codetitles) = @_;
+    my ($dom,$type,$filter,$numtitles,$cloneruname,$clonerudom,$domcloner,$codetitles,
+        $cc_clone,$reqcrsdom,$reqinstcode) = @_;
     my (%courses,%showcourses,$cloner);
     if (($filter->{'ownerfilter'} ne '') ||
         ($filter->{'ownerdomfilter'} ne '')) {
@@ -15304,10 +16201,10 @@ sub search_courses {
                                              $filter->{'combownerfilter'},
                                              $filter->{'coursefilter'},
                                              undef,undef,$type,$regexpok,undef,undef,
-                                             undef,undef,$cloner,$env{'form.cc_clone'},
+                                             undef,undef,$cloner,$cc_clone,
                                              $filter->{'cloneableonly'},
                                              $createdbefore,$createdafter,undef,
-                                             $domcloner);
+                                             $domcloner,undef,$reqcrsdom,$reqinstcode);
     if (($filter->{'personfilter'} ne '') && ($filter->{'persondomfilter'} ne '')) {
         my $ccrole;
         if ($type eq 'Community') {
@@ -15327,7 +16224,7 @@ sub search_courses {
                 if (ref($courses{$cid}) eq 'HASH') {
                     if (ref($courses{$cid}{roles}) eq 'ARRAY') {
                         if (!grep(/^\Q$courserole\E$/,@{$courses{$cid}{roles}})) {
-                            push (@{$courses{$cid}{roles}},$courserole);
+                            push(@{$courses{$cid}{roles}},$courserole);
                         }
                     } else {
                         $courses{$cid}{roles} = [$courserole];
@@ -15345,8 +16242,206 @@ sub search_courses {
 
 =back
 
+=head1 Routines for version requirements for current course.
+
+=over 4
+
+=item * &check_release_required()
+
+Compares required LON-CAPA version with version on server, and
+if required version is newer looks for a server with the required version.
+
+Looks first at servers in user's owen domain; if none suitable, looks at
+servers in course's domain are permitted to host sessions for user's domain.
+
+Inputs:
+
+$loncaparev - Version on current server (format: Major.Minor.Subrelease-datestamp)
+
+$courseid - Course ID of current course
+
+$rolecode - User's current role in course (for switchserver query string).
+
+$required - LON-CAPA version needed by course (format: Major.Minor).
+
+
+Returns:
+
+$switchserver - query string tp append to /adm/switchserver call (if
+                current server's LON-CAPA version is too old.
+
+$warning - Message is displayed if no suitable server could be found.
+
 =cut
 
+sub check_release_required {
+    my ($loncaparev,$courseid,$rolecode,$required) = @_;
+    my ($switchserver,$warning);
+    if ($required ne '') {
+        my ($reqdmajor,$reqdminor) = ($required =~ /^(\d+)\.(\d+)$/);
+        my ($major,$minor) = ($loncaparev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?$/);
+        if ($reqdmajor ne '' && $reqdminor ne '') {
+            my $otherserver;
+            if (($major eq '' && $minor eq '') ||
+                (($reqdmajor > $major) || (($reqdmajor == $major) && ($reqdminor > $minor)))) {
+                my ($userdomserver) = &Apache::lonnet::choose_server($env{'user.domain'},undef,$required,1);
+                my $switchlcrev =
+                    &Apache::lonnet::get_server_loncaparev($env{'user.domain'},
+                                                           $userdomserver);
+                my ($swmajor,$swminor) = ($switchlcrev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?$/);
+                if (($swmajor eq '' && $swminor eq '') || ($reqdmajor > $swmajor) ||
+                    (($reqdmajor == $swmajor) && ($reqdminor > $swminor))) {
+                    my $cdom = $env{'course.'.$courseid.'.domain'};
+                    if ($cdom ne $env{'user.domain'}) {
+                        my ($coursedomserver,$coursehostname) = &Apache::lonnet::choose_server($cdom,undef,$required,1);
+                        my $serverhomeID = &Apache::lonnet::get_server_homeID($coursehostname);
+                        my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
+                        my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
+                        my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
+                        my $remoterev = &Apache::lonnet::get_server_loncaparev($serverhomedom,$coursedomserver);
+                        my $canhost =
+                            &Apache::lonnet::can_host_session($env{'user.domain'},
+                                                              $coursedomserver,
+                                                              $remoterev,
+                                                              $udomdefaults{'remotesessions'},
+                                                              $defdomdefaults{'hostedsessions'});
+
+                        if ($canhost) {
+                            $otherserver = $coursedomserver;
+                        } else {
+                            $warning = &mt('Requires LON-CAPA version [_1].',$env{'course.'.$courseid.'.internal.releaserequired'}).'<br />'. &mt("No suitable server could be found amongst servers in either your own domain or in the course's domain.");
+                        }
+                    } else {
+                        $warning = &mt('Requires LON-CAPA version [_1].',$env{'course.'.$courseid.'.internal.releaserequired'}).'<br />'.&mt("No suitable server could be found amongst servers in your own domain (which is also the course's domain).");
+                    }
+                } else {
+                    $otherserver = $userdomserver;
+                }
+            }
+            if ($otherserver ne '') {
+                $switchserver = 'otherserver='.$otherserver.'&amp;role='.$rolecode;
+            }
+        }
+    }
+    return ($switchserver,$warning);
+}
+
+=pod
+
+=item * &check_release_result()
+
+Inputs:
+
+$switchwarning - Warning message if no suitable server found to host session.
+
+$switchserver - query string to append to /adm/switchserver containing lonHostID
+                and current role.
+
+Returns: HTML to display with information about requirement to switch server.
+         Either displaying warning with link to Roles/Courses screen or
+         display link to switchserver.
+
+=cut
+
+sub check_release_result {
+    my ($switchwarning,$switchserver) = @_;
+    my $output = &start_page('Selected course unavailable on this server').
+                 '<p class="LC_warning">';
+    if ($switchwarning) {
+        $output .= $switchwarning.'<br /><a href="/adm/roles">';
+        if (&show_course()) {
+            $output .= &mt('Display courses');
+        } else {
+            $output .= &mt('Display roles');
+        }
+        $output .= '</a>';
+    } elsif ($switchserver) {
+        $output .= &mt('This course requires a newer version of LON-CAPA than is installed on this server.').
+                   '<br />'.
+                   '<a href="/adm/switchserver?'.$switchserver.'">'.
+                   &mt('Switch Server').
+                   '</a>';
+    }
+    $output .= '</p>'.&end_page();
+    return $output;
+}
+
+=pod
+
+=item * &needs_coursereinit()
+
+Determine if course contents stored for user's session needs to be
+refreshed, because content has changed since "Big Hash" last tied.
+
+Check for change is made if time last checked is more than 10 minutes ago
+(by default).
+
+Inputs:
+
+$loncaparev - Version on current server (format: Major.Minor.Subrelease-datestamp)
+
+$interval (optional) - Time which may elapse (in s) between last check for content
+                       change in current course. (default: 600 s).
+
+Returns: an array; first element is:
+
+=over 4
+
+'switch' - if content updates mean user's session
+           needs to be switched to a server running a newer LON-CAPA version
+
+'update' - if course session needs to be refreshed (i.e., Big Hash needs to be reloaded)
+           on current server hosting user's session
+
+''       - if no action required.
+
+=back
+
+If first item element is 'switch':
+
+second item is $switchwarning - Warning message if no suitable server found to host session.
+
+third item is $switchserver - query string to append to /adm/switchserver containing lonHostID
+                              and current role.
+
+otherwise: no other elements returned.
+
+=back
+
+=cut
+
+sub needs_coursereinit {
+    my ($loncaparev,$interval) = @_;
+    return() unless ($env{'request.course.id'} && $env{'request.course.tied'});
+    my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+    my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+    my $now = time;
+    if ($interval eq '') {
+        $interval = 600;
+    }
+    if (($now-$env{'request.course.timechecked'})>$interval) {
+        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 '') {
+                my $required = $env{'course.'.$cdom.'_'.$cnum.'.internal.releaserequired'};
+                if ($curr_reqd_hash{'internal.releaserequired'} ne $required) {
+                    &Apache::lonnet::appenv({'course.'.$cdom.'_'.$cnum.'.internal.releaserequired' =>
+                                             $curr_reqd_hash{'internal.releaserequired'}});
+                    my ($switchserver,$switchwarning) =
+                        &check_release_required($loncaparev,$cdom.'_'.$cnum,$env{'request.role'},
+                                                $curr_reqd_hash{'internal.releaserequired'});
+                    if ($switchwarning ne '' || $switchserver ne '') {
+                        return ('switch',$switchwarning,$switchserver);
+                    }
+                }
+            }
+            return ('update');
+        }
+    }
+    return ();
+}
 
 sub update_content_constraints {
     my ($cdom,$cnum,$chome,$cid) = @_;
@@ -15459,8 +16554,8 @@ sub recurse_supplemental {
 }
 
 sub symb_to_docspath {
-    my ($symb) = @_;
-    return unless ($symb);
+    my ($symb,$navmapref) = @_;
+    return unless ($symb && ref($navmapref));
     my ($mapurl,$id,$resurl) = &Apache::lonnet::decode_symb($symb);
     if ($resurl=~/\.(sequence|page)$/) {
         $mapurl=$resurl;
@@ -15468,9 +16563,11 @@ sub symb_to_docspath {
         $mapurl=$env{'course.'.$env{'request.course.id'}.'.url'};
     }
     my $mapresobj;
-    my $navmap = Apache::lonnavmaps::navmap->new();
-    if (ref($navmap)) {
-        $mapresobj = $navmap->getResourceByUrl($mapurl);
+    unless (ref($$navmapref)) {
+        $$navmapref = Apache::lonnavmaps::navmap->new();
+    }
+    if (ref($$navmapref)) {
+        $mapresobj = $$navmapref->getResourceByUrl($mapurl);
     }
     $mapurl=~s{^.*/([^/]+)\.(\w+)$}{$1};
     my $type=$2;
@@ -15480,7 +16577,7 @@ sub symb_to_docspath {
         if ($pcslist ne '') {
             foreach my $pc (split(/,/,$pcslist)) {
                 next if ($pc <= 1);
-                my $res = $navmap->getByMapPc($pc);
+                my $res = $$navmapref->getByMapPc($pc);
                 if (ref($res)) {
                     my $thisurl = $res->src();
                     $thisurl=~s{^.*/([^/]+)\.\w+$}{$1};
@@ -15529,29 +16626,30 @@ sub symb_to_docspath {
 sub captcha_display {
     my ($context,$lonhost) = @_;
     my ($output,$error);
-    my ($captcha,$pubkey,$privkey) = &get_captcha_config($context,$lonhost);
+    my ($captcha,$pubkey,$privkey,$version) =
+        &get_captcha_config($context,$lonhost);
     if ($captcha eq 'original') {
         $output = &create_captcha();
         unless ($output) {
             $error = 'captcha';
         }
     } elsif ($captcha eq 'recaptcha') {
-        $output = &create_recaptcha($pubkey);
+        $output = &create_recaptcha($pubkey,$version);
         unless ($output) {
             $error = 'recaptcha';
         }
     }
-    return ($output,$error,$captcha);
+    return ($output,$error,$captcha,$version);
 }
 
 sub captcha_response {
     my ($context,$lonhost) = @_;
     my ($captcha_chk,$captcha_error);
-    my ($captcha,$pubkey,$privkey) = &get_captcha_config($context,$lonhost);
+    my ($captcha,$pubkey,$privkey,$version) = &get_captcha_config($context,$lonhost);
     if ($captcha eq 'original') {
         ($captcha_chk,$captcha_error) = &check_captcha();
     } elsif ($captcha eq 'recaptcha') {
-        $captcha_chk = &check_recaptcha($privkey);
+        $captcha_chk = &check_recaptcha($privkey,$version);
     } else {
         $captcha_chk = 1;
     }
@@ -15560,7 +16658,7 @@ sub captcha_response {
 
 sub get_captcha_config {
     my ($context,$lonhost) = @_;
-    my ($captcha,$pubkey,$privkey,$hashtocheck);
+    my ($captcha,$pubkey,$privkey,$version,$hashtocheck);
     my $hostname = &Apache::lonnet::hostname($lonhost);
     my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
     my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
@@ -15576,6 +16674,10 @@ sub get_captcha_config {
                     }
                     if ($privkey && $pubkey) {
                         $captcha = 'recaptcha';
+                        $version = $hashtocheck->{'recaptchaversion'};
+                        if ($version ne '2') {
+                            $version = 1;
+                        }
                     } else {
                         $captcha = 'original';
                     }
@@ -15593,6 +16695,10 @@ sub get_captcha_config {
             $privkey = $domconfhash{$serverhomedom.'.login.recaptchakeys_private'};
             if ($privkey && $pubkey) {
                 $captcha = 'recaptcha';
+                $version = $domconfhash{$serverhomedom.'.login.recaptchaversion'};
+                if ($version ne '2') {
+                    $version = 1;
+                }
             } else {
                 $captcha = 'original';
             }
@@ -15600,7 +16706,7 @@ sub get_captcha_config {
             $captcha = 'original';
         }
     }
-    return ($captcha,$pubkey,$privkey);
+    return ($captcha,$pubkey,$privkey,$version);
 }
 
 sub create_captcha {
@@ -15659,38 +16765,61 @@ sub check_captcha {
 }
 
 sub create_recaptcha {
-    my ($pubkey) = @_;
-    my $use_ssl;
-    if ($ENV{'SERVER_PORT'} == 443) {
-        $use_ssl = 1;
-    }
-    my $captcha = Captcha::reCAPTCHA->new;
-    return $captcha->get_options_setter({theme => 'white'})."\n".
-           $captcha->get_html($pubkey,undef,$use_ssl).
-           &mt('If either word is hard to read, [_1] will replace them.',
-               '<img src="/res/adm/pages/refresh.gif" alt="reCAPTCHA refresh" />').
-           '<br /><br />';
+    my ($pubkey,$version) = @_;
+    if ($version >= 2) {
+        return '<div class="g-recaptcha" data-sitekey="'.$pubkey.'"></div>';
+    } else {
+        my $use_ssl;
+        if ($ENV{'SERVER_PORT'} == 443) {
+            $use_ssl = 1;
+        }
+        my $captcha = Captcha::reCAPTCHA->new;
+        return $captcha->get_options_setter({theme => 'white'})."\n".
+               $captcha->get_html($pubkey,undef,$use_ssl).
+               &mt('If the text is hard to read, [_1] will replace them.',
+                   '<img src="/res/adm/pages/refresh.gif" alt="reCAPTCHA refresh" />').
+               '<br /><br />';
+     }
 }
 
 sub check_recaptcha {
-    my ($privkey) = @_;
+    my ($privkey,$version) = @_;
     my $captcha_chk;
-    my $captcha = Captcha::reCAPTCHA->new;
-    my $captcha_result =
-        $captcha->check_answer(
-                                $privkey,
-                                $ENV{'REMOTE_ADDR'},
-                                $env{'form.recaptcha_challenge_field'},
-                                $env{'form.recaptcha_response_field'},
-                              );
-    if ($captcha_result->{is_valid}) {
-        $captcha_chk = 1;
+    if ($version >= 2) {
+        my $ua = LWP::UserAgent->new;
+        $ua->timeout(10);
+        my %info = (
+                     secret   => $privkey,
+                     response => $env{'form.g-recaptcha-response'},
+                     remoteip => $ENV{'REMOTE_ADDR'},
+                   );
+        my $response = $ua->post('https://www.google.com/recaptcha/api/siteverify',\%info);
+        if ($response->is_success)  {
+            my $data = JSON::DWIW->from_json($response->decoded_content);
+            if (ref($data) eq 'HASH') {
+                if ($data->{'success'}) {
+                    $captcha_chk = 1;
+                }
+            }
+        }
+    } else {
+        my $captcha = Captcha::reCAPTCHA->new;
+        my $captcha_result =
+            $captcha->check_answer(
+                                    $privkey,
+                                    $ENV{'REMOTE_ADDR'},
+                                    $env{'form.recaptcha_challenge_field'},
+                                    $env{'form.recaptcha_response_field'},
+                                  );
+        if ($captcha_result->{is_valid}) {
+            $captcha_chk = 1;
+        }
     }
     return $captcha_chk;
 }
 
 sub emailusername_info {
-    my @fields = ('firstname','lastname','institution','web','location','officialemail');
+    my @fields = ('firstname','lastname','institution','web','location','officialemail','id');
     my %titles = &Apache::lonlocal::texthash (
                      lastname      => 'Last Name',
                      firstname     => 'First Name',
@@ -15698,6 +16827,7 @@ sub emailusername_info {
                      location      => "School's city, state/province, country",
                      web           => "School's web address",
                      officialemail => 'E-mail address at institution (if different)',
+                     id            => 'Student/Employee ID',
                  );
     return (\@fields,\%titles);
 }
@@ -15778,11 +16908,19 @@ sub des_decrypt {
     } else {
         $cypher=new DES $keybin;
     }
-    my $plaintext=
-        $cypher->decrypt(unpack("a8",pack("H16",substr($cyphertext,0,16))));
-    $plaintext.=
-        $cypher->decrypt(unpack("a8",pack("H16",substr($cyphertext,16,16))));
-    $plaintext=substr($plaintext,1,ord(substr($plaintext,0,1)) );
+    my $plaintext='';
+    my $cypherlength = length($cyphertext);
+    my $numchunks = int($cypherlength/32);
+    for (my $j=0; $j<$numchunks; $j++) {
+        my $start = $j*32;
+        my $cypherblock = substr($cyphertext,$start,32);
+        my $chunk =
+            $cypher->decrypt(unpack("a8",pack("H16",substr($cypherblock,0,16))));
+        $chunk .=
+            $cypher->decrypt(unpack("a8",pack("H16",substr($cypherblock,16,16))));
+        $chunk=substr($chunk,1,ord(substr($chunk,0,1)) );
+        $plaintext .= $chunk;
+    }
     return $plaintext;
 }