--- loncom/interface/domainprefs.pm	2010/03/21 20:33:47	1.132
+++ loncom/interface/domainprefs.pm	2010/07/17 20:02:07	1.137
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Handler to set domain-wide configuration settings
 #
-# $Id: domainprefs.pm,v 1.132 2010/03/21 20:33:47 raeburn Exp $
+# $Id: domainprefs.pm,v 1.137 2010/07/17 20:02:07 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -203,12 +203,12 @@ sub handler {
                 'directorysrch','usercreation','usermodification',
                 'contacts','defaults','scantron','coursecategories',
                 'serverstatuses','requestcourses','helpsettings',
-                'coursedefaults'],$dom);
+                'coursedefaults','usersessions'],$dom);
     my @prefs_order = ('rolecolors','login','defaults','quotas','autoenroll',
                        'autoupdate','autocreate','directorysrch','contacts',
                        'usercreation','usermodification','scantron',
                        'requestcourses','coursecategories','serverstatuses','helpsettings',
-                       'coursedefaults');
+                       'coursedefaults','usersessions');
     my %prefs = (
         'rolecolors' =>
                    { text => 'Default color schemes',
@@ -236,7 +236,7 @@ sub handler {
                                   col2 => 'Value'}],
                     },
         'quotas' => 
-                    { text => 'User blogs, personal information pages and portfolios',
+                    { text => 'User blogs, personal information pages, portfolios',
                       help => 'Domain_Configuration_Quotas',
                       header => [{col1 => 'User affiliation',
                                   col2 => 'Available tools',
@@ -349,6 +349,14 @@ sub handler {
                   header => [{col1 => 'Setting',
                               col2 => 'Value',}],
                  },
+         'usersessions' =>
+                 {text  => 'User session hosting',
+                  help  => 'Domain_Configuration_User_Sessions',
+                  header => [{col1 => 'Hosting of users from other domains',
+                              col2 => 'Rules'},
+                             {col1 => "Hosting domain's own users elsewhere",
+                              col2 => 'Rules'}],
+                 },
     );
     my %servers = &dom_servers($dom);
     if (keys(%servers) > 1) {
@@ -364,7 +372,7 @@ sub handler {
     my @actions = &Apache::loncommon::get_env_multiple('form.actions');
     &Apache::lonhtmlcommon::add_breadcrumb
     ({href=>"javascript:changePage(document.$phase,'pickactions')",
-      text=>"Pick functionality"});
+      text=>"Settings to display/modify"});
     my $confname = $dom.'-domainconfig';
     if ($phase eq 'process') {
         &Apache::lonconfigsettings::make_changes($r,$dom,$phase,$context,\@prefs_order,\%prefs,\%domconfig,$confname,\@roles);
@@ -451,6 +459,8 @@ sub process_changes {
         $output = &modify_helpsettings($r,$dom,$confname,%domconfig);
     } elsif ($action eq 'coursedefaults') {
         $output = &modify_coursedefaults($dom,%domconfig);
+    } elsif ($action eq 'usersessions') {
+        $output = &modify_usersessions($dom,%domconfig);
     }
     return $output;
 }
@@ -503,6 +513,8 @@ sub print_config_box {
             $output .= &print_quotas($dom,$settings,\$rowtotal,$action);
         } elsif ($action eq 'helpsettings') {
             $output .= &print_helpsettings('top',$dom,$confname,$settings,\$rowtotal);
+        } elsif ($action eq 'usersessions') {
+            $output .= &print_usersessions('top',$dom,$settings,\$rowtotal); 
         } elsif ($action eq 'rolecolors') {
             $output .= &print_rolecolors($phase,'student',$dom,$confname,$settings,\$rowtotal);
         }
@@ -566,6 +578,8 @@ sub print_config_box {
             $output .= &print_courserequestmail($dom,$settings,\$rowtotal);
         } elsif ($action eq 'helpsettings') {
             $output .= &print_helpsettings('bottom',$dom,$confname,$settings,\$rowtotal);
+        } elsif ($action eq 'usersessions') {
+            $output .= &print_usersessions('bottom',$dom,$settings,\$rowtotal);
         } elsif ($action eq 'rolecolors') {
             $output .= &print_rolecolors($phase,'coordinator',$dom,$confname,$settings,\$rowtotal).'
            </table>
@@ -756,7 +770,6 @@ sub print_login {
             $checkedon{$item} = ' ';
         }
     }
-    my $loginheader = 'image';
     my @images = ('img','logo','domlogo','login');
     my @logintext = ('textcol','bgcol');
     my @bgs = ('pgbg','mainbg','sidebg');
@@ -805,9 +818,6 @@ sub print_login {
                 $is_custom{$item} = 1;
             }
         }
-        if ($settings->{'loginheader'} ne '') {
-            $loginheader = $settings->{'loginheader'};
-        }
         if ($settings->{'font'} ne '') {
             $designs{'font'} = $settings->{'font'};
             $is_custom{'font'} = 1;
@@ -866,7 +876,7 @@ sub print_login {
             '</tr>';
         $itemcount ++;
     }
-    $datatable .= &display_color_options($dom,$confname,$phase,'login',$itemcount,\%choices,\%is_custom,\%defaults,\%designs,\@images,\@bgs,\@links,\%alt_text,$rowtotal,\@logintext,$loginheader);
+    $datatable .= &display_color_options($dom,$confname,$phase,'login',$itemcount,\%choices,\%is_custom,\%defaults,\%designs,\@images,\@bgs,\@links,\%alt_text,$rowtotal,\@logintext);
     $datatable .= '</tr></table></td></tr>';
     return $datatable;
 }
@@ -986,9 +996,9 @@ sub print_rolecolors {
 
 sub display_color_options {
     my ($dom,$confname,$phase,$role,$itemcount,$choices,$is_custom,$defaults,$designs,
-        $images,$bgs,$links,$alt_text,$rowtotal,$logintext,$loginheader) = @_;
+        $images,$bgs,$links,$alt_text,$rowtotal,$logintext) = @_;
     my $css_class = $itemcount%2?' class="LC_odd_row"':'';
-    my $datatable = '<tr>'.
+    my $datatable = '<tr'.$css_class.'>'.
         '<td>'.$choices->{'font'}.'</td>';
     if (!$is_custom->{'font'}) {
         $datatable .=  '<td>'.&mt('Default in use:').'&nbsp;<span id="css_default_'.$role.'_font" style="color: '.$defaults->{'font'}.';">'.$defaults->{'font'}.'</span></td>';
@@ -1028,8 +1038,7 @@ sub display_color_options {
         if ($role eq 'login') {
             if ($img eq 'login') {
                 $login_hdr_pick =
-                    &login_header_options($img,$role,$defaults,$is_custom,$choices,
-                                          $loginheader);
+                    &login_header_options($img,$role,$defaults,$is_custom,$choices);
                 $logincolors =
                     &login_text_colors($img,$role,$logintext,$phase,$choices,
                                             $designs);
@@ -1106,8 +1115,8 @@ sub display_color_options {
                 }
                 $datatable .= '<td>';
                 if ($img eq 'login') {
-                    $datatable .= $login_hdr_pick;    
-                }
+                    $datatable .= $login_hdr_pick;
+                } 
                 $datatable .= &image_changes($is_custom->{$img},$alt_text->{$img},$img_import,
                                              $showfile,$fullsize,$role,$img,$imgfile,$logincolors);
             } else {
@@ -1121,7 +1130,9 @@ sub display_color_options {
         if ($switchserver) {
             $datatable .= &mt('Upload to library server: [_1]',$switchserver);
         } else {
-            $datatable .='&nbsp;<input type="file" name="'.$role.'_'.$img.'" />';
+            if ($img ne 'login') { # suppress file selection for Log-in header
+                $datatable .='&nbsp;<input type="file" name="'.$role.'_'.$img.'" />';
+            }
         }
         $datatable .= '</td></tr>';
     }
@@ -1210,20 +1221,10 @@ sub logo_display_options {
 }
 
 sub login_header_options  {
-    my ($img,$role,$defaults,$is_custom,$choices,$loginheader) = @_;
-    my $image_checked = ' checked="checked" ';
-    my $text_checked = ' ';
-    if ($loginheader eq 'text') {
-        $image_checked = ' ';
-        $text_checked = ' checked="checked" ';
-    }
-    my $output = '<span class="LC_nobreak"><label><input type="radio" name="'.
-              'loginheader" value="image" '.$image_checked.'/>'.
-              &mt('use image').'</label>&nbsp;&nbsp;&nbsp;'.
-              '<label><input type="radio" name="loginheader" value="text"'.
-              $text_checked.'/>'.&mt('use text').'</label><br />'."\n";
+    my ($img,$role,$defaults,$is_custom,$choices) = @_;
+    my $output = '';
     if ((!$is_custom->{'textcol'}) || (!$is_custom->{'bgcol'})) {
-        $output .= &mt('Text default(s)').':<br />';
+        $output .= &mt('Text default(s):').'<br />';
         if (!$is_custom->{'textcol'}) {
             $output .= $choices->{'textcol'}.':&nbsp;'.$defaults->{'logintext'}{'textcol'}.
                        '&nbsp;&nbsp;&nbsp;';
@@ -1259,25 +1260,31 @@ sub login_text_colors {
 sub image_changes {
     my ($is_custom,$alt_text,$img_import,$showfile,$fullsize,$role,$img,$imgfile,$logincolors) = @_;
     my $output;
-    if (!$is_custom) {
+    if ($img eq 'login') {
+            # suppress image for Log-in header
+    } elsif (!$is_custom) {
         if ($img ne 'domlogo') {
             $output .= &mt('Default image:').'<br />';
         } else {
             $output .= &mt('Default in use:').'<br />';
         }
     }
-    if ($img_import) {
-        $output .= '<input type="hidden" name="'.$role.'_import_'.$img.'" value="'.$imgfile.'" />';
-    }
-    $output .= '<a href="'.$fullsize.'" target="_blank"><img src="'.
-               $showfile.'" alt="'.$alt_text.'" border="0" /></a></td>';
-    if ($is_custom) {
-        $output .= '<td>'.$logincolors.'<span class="LC_nobreak"><label>'.
-                   '<input type="checkbox" name="'.
-                   $role.'_del_'.$img.'" value="1" />'.&mt('Delete?').
-                   '</label>&nbsp;'.&mt('Replace:').'</span><br />';
+    if ($img eq 'login') { # suppress image for Log-in header
+        $output .= '<td>'.$logincolors;
     } else {
-        $output .= '<td valign="bottom">'.$logincolors.&mt('Upload:').'<br />';
+        if ($img_import) {
+            $output .= '<input type="hidden" name="'.$role.'_import_'.$img.'" value="'.$imgfile.'" />';
+        }
+        $output .= '<a href="'.$fullsize.'" target="_blank"><img src="'.
+                   $showfile.'" alt="'.$alt_text.'" border="0" /></a></td>';
+        if ($is_custom) {
+            $output .= '<td>'.$logincolors.'<span class="LC_nobreak"><label>'.
+                       '<input type="checkbox" name="'.
+                       $role.'_del_'.$img.'" value="1" />'.&mt('Delete?').
+                       '</label>&nbsp;'.&mt('Replace:').'</span><br />';
+        } else {
+            $output .= '<td valign="bottom">'.$logincolors.&mt('Upload:').'<br />';
+        }
     }
     return $output;
 }
@@ -2014,12 +2021,13 @@ sub print_contacts {
     my ($dom,$settings,$rowtotal) = @_;
     my $datatable;
     my @contacts = ('adminemail','supportemail');
-    my (%checked,%to,%otheremails);
+    my (%checked,%to,%otheremails,%bccemails);
     my @mailings = ('errormail','packagesmail','lonstatusmail','helpdeskmail',
                     'requestsmail');
     foreach my $type (@mailings) {
         $otheremails{$type} = '';
     }
+    $bccemails{'helpdeskmail'} = '';
     if (ref($settings) eq 'HASH') {
         foreach my $item (@contacts) {
             if (exists($settings->{$item})) {
@@ -2035,6 +2043,9 @@ sub print_contacts {
                         }
                     }
                     $otheremails{$type} = $settings->{$type}{'others'};
+                    if ($type eq 'helpdeskmail') {
+                        $bccemails{$type} = $settings->{$type}{'bcc'};
+                    }
                 }
             } elsif ($type eq 'lonstatusmail') {
                 $checked{'lonstatusmail'}{'adminemail'} = ' checked="checked" ';
@@ -2078,8 +2089,13 @@ sub print_contacts {
         }
         $datatable .= '</span><br />'.&mt('Others').':&nbsp;&nbsp;'.
                       '<input type="text" name="'.$type.'_others" '.
-                      'value="'.$otheremails{$type}.'"  />'.
-                      '</td></tr>'."\n";
+                      'value="'.$otheremails{$type}.'"  />';
+        if ($type eq 'helpdeskmail') {
+            $datatable .= '<br />'.&mt('Bcc:').('&nbsp;'x6).
+                          '<input type="text" name="'.$type.'_bcc" '.
+                          'value="'.$bccemails{$type}.'"  />';
+        }
+        $datatable .= '</td></tr>'."\n";
     }
     $$rowtotal += $rownum;
     return $datatable;
@@ -2240,6 +2256,110 @@ sub print_coursedefaults {
     return $datatable;
 }
 
+sub print_usersessions {
+    my ($position,$dom,$settings,$rowtotal) = @_;
+    my ($css_class,$datatable,%checked,%choices);
+    my %lt = &usersession_titles();
+    my $itemcount = 1;
+    my $numinrow = 6;
+    my $prefix;
+    my @types;
+    if ($position eq 'top') {
+        $prefix = 'hosted';
+        @types = ('excludedomain','includedomain');
+    } else {
+        $prefix = 'remote';
+        @types = ('version','excludedomain','includedomain');
+    } 
+    my (%current,%checkedon,%checkedoff);
+    my @lcversions = &Apache::lonnet::all_loncaparevs();
+    my @alldoms = sort(&Apache::lonnet::all_domains());
+    foreach my $type (@types) {
+        $checkedon{$type} = '';
+        $checkedoff{$type} = ' checked="checked"';
+    }
+    if (ref($settings) eq 'HASH') {
+        if (ref($settings->{$prefix}) eq 'HASH') {
+            foreach my $key (keys(%{$settings->{$prefix}})) {
+                $current{$key} = $settings->{$prefix}{$key};
+                if ($key eq 'version') {
+                    if ($current{$key} ne '') {
+                        $checkedon{$key} = ' checked="checked"';
+                        $checkedoff{$key} = '';
+                    }
+                } elsif (ref($current{$key}) eq 'ARRAY') {
+                    $checkedon{$key} = ' checked="checked"';
+                    $checkedoff{$key} = '';
+                }
+            }
+        }
+    }
+    foreach my $type (@types) {
+        $css_class = $itemcount%2 ? ' class="LC_odd_row"' : '';
+        $datatable .= '<tr'.$css_class.'>
+                       <td><span class="LC_nobreak">'.$lt{$type}.'</span><br />
+                           <span class="LC_nobreak">&nbsp;
+                           <label><input type="radio" name="'.$prefix.'_'.$type.'_inuse" '.$checkedoff{$type}.' value="0" />'.&mt('Not in use').'</label>&nbsp;
+                           <label><input type="radio" name="'.$prefix.'_'.$type.'_inuse" '.$checkedon{$type}.' value="1" />'.&mt('In use').'</label></span></td><td>';
+        if ($type eq 'version') {
+            my $selector = '<select name="'.$prefix.'_version">';
+            foreach my $version (@lcversions) {
+                my $selected = '';
+                if ($current{'version'} eq $version) {
+                    $selected = ' selected="selected"';
+                }
+                $selector .= ' <option value="'.$version.'"'.
+                             $selected.'>'.$version.'</option>';
+            }
+            $selector .= '</select> ';
+            $datatable .= &mt('remote server must be version: [_1] or later',$selector);
+        } else {
+            $datatable.= '<div><input type="button" value="'.&mt('check all').'" '.
+                         'onclick="javascript:checkAll(document.display.'.$prefix.'_'.$type.')"'.
+                         ' />'.('&nbsp;'x2).
+                         '<input type="button" value="'.&mt('uncheck all').'" '.
+                         'onclick="javascript:uncheckAll(document.display.'.$prefix.'_'.$type.')" />'.
+                         "\n".
+                         '</div><div><table>';
+            my $rem;
+            for (my $i=0; $i<@alldoms; $i++) {
+                next if ($alldoms[$i] eq $dom);
+                my $checkedtype;
+                if (ref($current{$type}) eq 'ARRAY') {
+                    if (grep(/^\Q$alldoms[$i]\E$/,@{$current{$type}})) {
+                        $checkedtype = ' checked="checked"';
+                    }
+                }
+                $rem = $i%($numinrow);
+                if ($rem == 0) {
+                    if ($i > 0) {
+                        $datatable .= '</tr>';
+                    }
+                    $datatable .= '<tr>';
+                }
+                $datatable .= '<td class="LC_left_item">'.
+                              '<span class="LC_nobreak"><label>'.
+                              '<input type="checkbox" name="'.$prefix.'_'.$type.
+                              '" value="'.$alldoms[$i].'"'.$checkedtype.' />'.$alldoms[$i].
+                              '</label></span></td>';
+            }
+            $rem = @alldoms%($numinrow);
+            my $colsleft = $numinrow - $rem;
+            if ($colsleft > 1 ) {
+                $datatable .= '<td colspan="'.$colsleft.'" class="LC_left_item">'.
+                              '&nbsp;</td>';
+            } elsif ($colsleft == 1) {
+                $datatable .= '<td class="LC_left_item">&nbsp;</td>';
+            }
+            $datatable .= '</tr></table>';
+        }
+        $datatable .= '</td></tr>';
+        $itemcount ++;
+    }
+    $$rowtotal += $itemcount;
+    return $datatable;
+}
+
 sub contact_titles {
     my %titles = &Apache::lonlocal::texthash (
                    'supportemail' => 'Support E-mail address',
@@ -3699,22 +3819,12 @@ sub modify_login {
                     }
                 }
             }
-            if (($domconfig{'login'}{'loginheader'} eq 'text') && 
-                ($env{'form.loginheader'} eq 'image')) {
-                $changes{'loginheader'} = 1;
-            } elsif (($domconfig{'login'}{'loginheader'} eq '' ||
-                      $domconfig{'login'}{'loginheader'} eq 'image') &&
-                     ($env{'form.loginheader'} eq 'text')) {
-                $changes{'loginheader'} = 1;
-            }
         }
         if (keys(%changes) > 0 || $colchgtext) {
             &Apache::loncommon::devalidate_domconfig_cache($dom);
             $resulttext = &mt('Changes made:').'<ul>';
             foreach my $item (sort(keys(%changes))) {
-                if ($item eq 'loginheader') {
-                    $resulttext .= '<li>'.&mt("$title{$item} set to $env{'form.loginheader'}").'</li>';
-                } elsif ($item eq 'loginvia') {
+                if ($item eq 'loginvia') {
                     if (ref($changes{$item}) eq 'HASH') {
                         $resulttext .= '<li>'.&mt('Log-in page availability:').'<ul>';
                         foreach my $lonhost (sort(keys(%{$changes{$item}}))) {
@@ -5186,7 +5296,7 @@ sub modify_contacts {
             $currsetting{$key} = $domconfig{'contacts'}{$key};
         }
     }
-    my (%others,%to);
+    my (%others,%to,%bcc);
     my @contacts = ('supportemail','adminemail');
     my @mailings = ('errormail','packagesmail','helpdeskmail','lonstatusmail',
                     'requestsmail');
@@ -5202,6 +5312,10 @@ sub modify_contacts {
         }  
         $others{$type} = $env{'form.'.$type.'_others'};
         $contacts_hash{contacts}{$type}{'others'} = $others{$type};
+        if ($type eq 'helpdeskmail') {
+            $bcc{$type} = $env{'form.'.$type.'_bcc'};
+            $contacts_hash{contacts}{$type}{'bcc'} = $bcc{$type};
+        }
     }
     foreach my $item (@contacts) {
         $to{$item} = $env{'form.'.$item};
@@ -5226,6 +5340,11 @@ sub modify_contacts {
             if ($others{$type} ne $currsetting{$type}{'others'}) {
                 push(@{$changes{$type}},'others');
             }
+            if ($type eq 'helpdeskmail') {   
+                if ($bcc{$type} ne $currsetting{$type}{'bcc'}) {
+                    push(@{$changes{$type}},'bcc'); 
+                }
+            }
         }
     } else {
         my %default;
@@ -5248,7 +5367,12 @@ sub modify_contacts {
             }
             if ($others{$type} ne '') {
                 push(@{$changes{$type}},'others');
-            } 
+            }
+            if ($type eq 'helpdeskmail') {
+                if ($bcc{$type} ne '') {
+                    push(@{$changes{$type}},'bcc');
+                }
+            }
         }
     }
     my $putresult = &Apache::lonnet::put_dom('configuration',\%contacts_hash,
@@ -5276,7 +5400,13 @@ sub modify_contacts {
                         push(@text,$others{$type});
                     }
                     $resulttext .= '<span class="LC_cusr_emph">'.
-                                   join(', ',@text).'</span></li>';
+                                   join(', ',@text).'</span>';
+                    if ($type eq 'helpdeskmail') {
+                        if ($bcc{$type} ne '') {
+                            $resulttext .= '&nbsp;'.&mt('with Bcc to').': <span class="LC_cusr_emph">'.$bcc{$type}.'</span>';
+                        }
+                    }
+                    $resulttext .= '</li>';
                 }
             }
             $resulttext .= '</ul>';
@@ -6507,6 +6637,162 @@ sub modify_coursedefaults {
     return $resulttext;
 }
 
+sub modify_usersessions {
+    my ($dom,%domconfig) = @_;
+    my @types = ('version','excludedomain','includedomain');
+    my @prefixes = ('remote','hosted');
+    my @lcversions = &Apache::lonnet::all_loncaparevs();
+    my (%defaultshash,%changes);
+    foreach my $prefix (@prefixes) {
+        $defaultshash{'usersessions'}{$prefix} = {};
+    }
+    my %domdefaults = &Apache::lonnet::get_domain_defaults($dom);
+    my $resulttext;
+    foreach my $prefix (@prefixes) {
+        foreach my $type (@types) {
+            my $inuse = $env{'form.'.$prefix.'_'.$type.'_inuse'};
+            if ($type eq 'version') {
+                my $value = $env{'form.'.$prefix.'_'.$type};
+                my $okvalue;
+                if ($value ne '') {
+                    if (grep(/^\Q$value\E$/,@lcversions)) {
+                        $okvalue = $value;
+                    }
+                }
+                if (ref($domconfig{'usersessions'}) eq 'HASH') {
+                    if (ref($domconfig{'usersessions'}{$prefix}) eq 'HASH') {
+                        if ($domconfig{'usersessions'}{$prefix}{$type} ne '') {
+                            if ($inuse == 0) {
+                                $changes{$prefix}{$type} = 1;
+                            } else {
+                                if ($okvalue ne $domconfig{'usersessions'}{$prefix}{$type}) {
+                                    $changes{$prefix}{$type} = 1;
+                                }
+                                if ($okvalue ne '') {
+                                    $defaultshash{'usersessions'}{$prefix}{$type} = $okvalue;
+                                } 
+                            }
+                        } else {
+                            if (($inuse == 1) && ($okvalue ne '')) {
+                                $defaultshash{'usersessions'}{$prefix}{$type} = $okvalue;
+                                $changes{$prefix}{$type} = 1;
+                            }
+                        }
+                    } else {
+                        if (($inuse == 1) && ($okvalue ne '')) {
+                            $defaultshash{'usersessions'}{$prefix}{$type} = $okvalue;
+                            $changes{$prefix}{$type} = 1;
+                        }
+                    }
+                } else {
+                    if (($inuse == 1) && ($okvalue ne '')) {
+                        $defaultshash{'usersessions'}{$prefix}{$type} = $okvalue;
+                        $changes{$prefix}{$type} = 1;
+                    }
+                }
+            } else {
+                my @vals = &Apache::loncommon::get_env_multiple('form.'.$prefix.'_'.$type);
+                my @okvals;
+                foreach my $val (@vals) {
+                    if (&Apache::lonnet::domain($val) ne '') {
+                        push(@okvals,$val);
+                    }
+                }
+                @okvals = sort(@okvals);
+                if (ref($domconfig{'usersessions'}) eq 'HASH') {
+                    if (ref($domconfig{'usersessions'}{$prefix}) eq 'HASH') {
+                        if (ref($domconfig{'usersessions'}{$prefix}{$type}) eq 'ARRAY') {
+                            if ($inuse == 0) {
+                                $changes{$prefix}{$type} = 1; 
+                            } else {
+                                $defaultshash{'usersessions'}{$prefix}{$type} = \@okvals;
+                                my @changed = &Apache::loncommon::compare_arrays($domconfig{'usersessions'}{$prefix}{$type},$defaultshash{'usersessions'}{$prefix}{$type});
+                                if (@changed > 0) {
+                                    $changes{$prefix}{$type} = 1;
+                                }
+                            }
+                        } else {
+                            if ($inuse == 1) {
+                                $defaultshash{'usersessions'}{$prefix}{$type} = \@okvals;
+                                $changes{$prefix}{$type} = 1;
+                            }
+                        } 
+                    } else {
+                        if ($inuse == 1) {
+                            $defaultshash{'usersessions'}{$prefix}{$type} = \@okvals;
+                            $changes{$prefix}{$type} = 1;
+                        }
+                    }
+                } else {
+                    if ($inuse == 1) {
+                        $defaultshash{'usersessions'}{$prefix}{$type} = \@okvals;
+                        $changes{$prefix}{$type} = 1;
+                    }
+                }
+            }
+        }
+    }
+    if (keys(%changes) > 0) {
+        my $putresult = &Apache::lonnet::put_dom('configuration',\%defaultshash,
+                                                 $dom);
+        if ($putresult eq 'ok') {
+            if (ref($defaultshash{'usersessions'}) eq 'HASH') {
+                if (ref($defaultshash{'usersessions'}{'remote'}) eq 'HASH') {
+                    $domdefaults{'remotesessions'} = $defaultshash{'usersessions'}{'remote'};
+                }
+                if (ref($defaultshash{'usersessions'}{'hosted'}) eq 'HASH') {
+                    $domdefaults{'hostedsessions'} = $defaultshash{'usersessions'}{'hosted'};
+                }
+            }
+            my $cachetime = 24*60*60;
+            &Apache::lonnet::do_cache_new('domdefaults',$dom,\%domdefaults,$cachetime);
+            my %lt = &usersession_titles();
+            $resulttext = &mt('Changes made:').'<ul>';
+            foreach my $prefix (@prefixes) {
+                if (ref($changes{$prefix}) eq 'HASH') {
+                    $resulttext .= '<li>'.$lt{$prefix}.'<ul>';
+                    foreach my $type (@types) {
+                        if (defined($changes{$prefix}{$type})) {
+                            my $newvalue;
+                            if (ref($defaultshash{'usersessions'}) eq 'HASH') {
+                                if (ref($defaultshash{'usersessions'}{$prefix})) {
+                                    if ($type eq 'version') {
+                                        $newvalue = $defaultshash{'usersessions'}{$prefix}{$type};
+                                    } elsif (ref($defaultshash{'usersessions'}{$prefix}{$type}) eq 'ARRAY') {
+                                        if (@{$defaultshash{'usersessions'}{$prefix}{$type}} > 0) {
+                                            $newvalue = join(', ',@{$defaultshash{'usersessions'}{$prefix}{$type}});
+                                        }
+                                    }
+                                }
+                            }
+                            if ($newvalue eq '') {
+                                if ($type eq 'version') {
+                                    $resulttext .= '<li>'.&mt('[_1] set to: off',$lt{$type}).'</li>';
+                                } else {
+                                    $resulttext .= '<li>'.&mt('[_1] set to: none',$lt{$type}).'</li>';
+                                }
+                            } else {
+                                if ($type eq 'version') {
+                                    $newvalue .= ' '.&mt('(or later)'); 
+                                } 
+                                $resulttext .= '<li>'.&mt('[_1] set to: [_2].',$lt{$type},$newvalue).'</li>'; 
+                            }
+                        }
+                    }
+                    $resulttext .= '</ul>';
+                }
+            }
+            $resulttext .= '</ul>';
+        } else {
+            $resulttext = '<span class="LC_error">'.
+                          &mt('An error occurred: [_1]',$putresult).'</span>';
+        }
+    } else {
+        $resulttext =  &mt('No changes made to settings for user session hosting.');
+    }
+    return $resulttext;
+}
+
 sub recurse_check {
     my ($chkcats,$categories,$depth,$name) = @_;
     if (ref($chkcats->[$depth]{$name}) eq 'ARRAY') {
@@ -6650,4 +6936,15 @@ sub active_dc_picker {
     return ($numdcs,$datatable);
 }
 
+sub usersession_titles {
+    return &Apache::lonlocal::texthash(
+               hosted => 'Hosting of sessions for users from other domains on servers in this domain',
+
+               remote => 'Hosting of sessions for users in this domain on servers in other domains',
+               version => 'LON-CAPA version requirement',
+               excludedomain => 'Specific domains excluded',
+               includedomain => 'Specific domains included',
+           );
+}
+
 1;