# The LearningOnline Network with CAPA
# Handler to set domain-wide configuration settings
#
# $Id: domainprefs.pm,v 1.4 2007/03/01 18:24:09 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
#
###############################################################
##############################################################

package Apache::domainprefs;

use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet;
use Apache::loncommon();
use Apache::lonhtmlcommon();
use Apache::lonlocal;
use LONCAPA();

sub handler {
    my $r=shift;
    if ($r->header_only) {
        &Apache::loncommon::content_type($r,'text/html');
        $r->send_http_header;
        return OK;
    }

    my $dom = $env{'request.role.domain'};
    my $domdesc = $Apache::lonnet::domaindescription{$dom};
    if (&Apache::lonnet::allowed('mau',$dom)) {
        &Apache::loncommon::content_type($r,'text/html');
        $r->send_http_header;
    } else {
        $env{'user.error.msg'}=
        "/adm/domainprefs:mau:0:0:Cannot modify domain settings";
        return HTTP_NOT_ACCEPTABLE;
    }
    &Apache::lonhtmlcommon::clear_breadcrumbs();
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                                            ['phase']);
    my $phase = "display";
    if ( exists($env{'form.phase'}) ) {
        $phase = $env{'form.phase'};
    }
    my %domconfig =
      &Apache::lonnet::get_dom('configuration',['login','quotas',
                               'autoenroll','autoupdate'],$dom);

    my @prefs = (
      { text => 'Log-in page options',
        help => 'Domain_Log-in_Page',
        action => 'login',
        header => [{col1 => 'Item',
                    col2 => 'Selection',}],
        },
      { text => 'Default quotas for user portfolios',
        help => 'Default_User_Quota',
        action => 'quotas',
        header => [{col1 => 'User type',
                    col2 => 'Default quota'}],
        },
      { text => 'Auto-enrollment settings',
        help => 'Domain_Auto_Enrollment',
        action => 'autoenroll',
        header => [{col1 => 'Configuration setting',
                    col2 => 'Value(s)'}],
        },
      { text => 'Auto-update settings',
        help => 'Domain_Auto_Update',
        action => 'autoupdate',
        header => [{col1 => 'Setting',
                    col2 => 'Value',},
                   {col1 => 'User Population',
                    col2 => 'Updataeable user data'}],
      },
    );
    &Apache::lonhtmlcommon::add_breadcrumb
    ({href=>"javascript:changePage(document.$phase,'display')",
      text=>"Domain Configuration"});
    if ($phase eq 'process') {
        &Apache::lonhtmlcommon::add_breadcrumb
          ({href=>"javascript:changePage(document.$phase,'$phase')",
            text=>"Updated"});
        &print_header($r,$phase);
        foreach my $item (@prefs) {
            $r->print('<h3>'.&mt($item->{'text'}).'</h3>'.
                   &process_changes($dom,$item->{'action'},%domconfig));
        }
        $r->print('<p>');
        &print_footer($r,$phase,'display','Back to actions menu');
        $r->print('</p>');
    } else {
        if ($phase eq '') {
            $phase = 'display';
        }
        my %helphash;   
        my $numprefs = @prefs;
        &print_header($r,$phase);
        $r->print('<table border="0" width="100%" cellpadding="2" cellspacing="4"><tr><td align="left" valign="top" width="45%">');
        foreach my $item (@prefs) {
            if ($item->{'action'} eq 'autoupdate') {
                $r->print('</td><td width="6%">&nbsp;</td><td align="left" valign="top" width="47%">');
            }
            &print_config_box($r,$dom,$item->{'action'},$item,
                              $domconfig{$item->{'action'}});
        }
        $r->print('
           </table>
          </td>
         </tr>
        </table>
      </td>
    </tr>
   </table>');
        &print_footer($r,$phase,'process','Store changes');
    }
    return OK;
}

sub process_changes {
    my ($dom,$action,%domconfig) = @_;
    my $output;
    if ($action eq 'login') {
        $output = &modify_login($dom,%domconfig);
    } elsif ($action eq 'quotas') {
        $output = &modify_quotas($dom,%domconfig);
    } elsif ($action eq 'autoenroll') {
        $output = &modify_autoenroll($dom,%domconfig);
    } elsif ($action eq 'autoupdate') {
        $output = &modify_autoupdate($dom,%domconfig);
    }
    return $output;
}

sub print_config_box {
    my ($r,$dom,$action,$item,$settings) = @_;
    $r->print('
         <table class="LC_nested_outer">
          <tr>
           <th>'.&mt($item->{text}).'&nbsp;'.
           &Apache::loncommon::help_open_topic($item->{'help'}).'</th>
          </tr>');
    if ($action eq 'autoupdate') {
        $r->print('
          <tr>
           <td>
            <table class="LC_nested">
             <tr class="LC_info_row">
              <td class="LC_left_item">'.$item->{'header'}->[0]->{'col1'}.'</td>
              <td class="LC_right_item">'.$item->{'header'}->[0]->{'col2'}.'</td>
             </tr>'.
        &print_autoupdate('top',$dom,$settings).'
           </table>
          </td>
         </tr>
         <tr>
           <td>
            <table class="LC_nested">
             <tr class="LC_info_row">
              <td class="LC_left_item">'.$item->{'header'}->[1]->{'col1'}.'</td>
              <td class="LC_right_item">'.$item->{'header'}->[1]->{'col2'}.'</td>
             </tr>'.
        &print_autoupdate('bottom',$dom,$settings));
    } else {
        $r->print('
          <tr>
           <td>
            <table class="LC_nested">
             <tr class="LC_info_row">
              <td class="LC_left_item">'.$item->{'header'}->[0]->{'col1'}.'</td>
              <td class="LC_right_item">'.$item->{'header'}->[0]->{'col2'}.'</td>
             </tr>');
        if ($action eq 'login') {
           $r->print(&print_login($settings));
        } elsif ($action eq 'quotas') {
           $r->print(&print_quotas($dom,$settings));
        } elsif ($action eq 'autoenroll') {
           $r->print(&print_autoenroll($dom,$settings));
        }  
    }
    $r->print('
   </table>
  </td>
 </tr>
</table><br />');
    return;
}

sub print_header {
    my ($r,$phase) = @_;
    my $js = qq|
<script type="text/javascript">
function changePage(formname,newphase) {
    formname.phase.value = newphase;
    formname.submit();
}
</script>
|;
    $r->print(&Apache::loncommon::start_page('View/Modify Domain Settings',
                                           $js));
    $r->print(&Apache::lonhtmlcommon::breadcrumbs('Domain Settings'));
    $r->print('<form method="post" name="'.$phase.'" action="/adm/domainprefs">');
    return;
}

sub print_footer {
    my ($r,$phase,$newphase,$button_text) = @_;
    $button_text = &mt($button_text);
    $r->print('<input type="hidden" name="phase" value="" />');
    my $dest='"javascript:changePage(document.'.$phase.','."'$newphase'".')"';
    if ($phase eq 'process') {
        $r->print('<a href='.$dest.'>'.$button_text.'</a>');
    } else {
        $r->print('<input type="button" name="store" value="'.
                  $button_text.'" onclick='.$dest.' />');
    }
    $r->print('</form>');
    $r->print('<br />'.&Apache::loncommon::end_page());
    return;
}

sub print_login {
    my ($settings) = @_;
    my $catalogon = ' checked="checked" ';
    my $catalogoff;
    my $adminmailon = ' ';
    my $adminmailoff = ' checked="checked" ';
    if (ref($settings) eq 'HASH') {
        if ($settings->{'coursecatalog'} eq '0') {
            $catalogoff = $catalogon;
            $catalogon = ' ';
        }
        if ($settings->{'adminmail'} eq '1') {
            $adminmailon = $adminmailoff;
            $adminmailoff = ' ';
        }
    }
    my %choices = 
        &Apache::lonlocal::texthash(
            coursecatalog => 'Display Course Catalog link?',
            adminmail => "Display Administrator's E-mail Address?"
        );
    my $datatable = 
        '<tr class="LC_odd_row"><td>'.$choices{'coursecatalog'}.
        '</td><td class="LC_right_item">'.
        '<nobr><input type="radio" name="coursecatalog"'.
        $catalogon.' value="1" />'.&mt('Yes').'&nbsp;'.
        '<input type="radio" name="coursecatalog"'.
        $catalogoff.'value="0" />'.&mt('No').'</nobr></td>'.
        '</tr><tr>'.
        '<td>'.$choices{'adminmail'}.'</td>'.
        '<td class="LC_right_item"><nobr>'.
        '<input type="radio" name="adminmail"'.
        $adminmailon.' value="1" />'.&mt('Yes').'&nbsp;'.
        '<input type="radio" name="adminmail"'.
        $adminmailoff.'value="0" />'.&mt('No').'</nobr></td>'.
        '</tr>';
    return $datatable;
}

sub print_quotas {
    my ($dom,$settings) = @_;
    my $datatable;
    my ($usertypes,$order) = &Apache::lonnet::retrieve_inst_usertypes($dom);
    my $othertitle = "All users";
    my @types;
    if (ref($order) eq 'ARRAY') {
        @types = @{$order};
    }
    if (@types == 0) {
        if (ref($usertypes) eq 'HASH') {
            @types = sort(keys(%{$usertypes}));
        }
    }
    my $typecount = 0;
    my $css_class;
    if (@types > 0) {
        foreach my $type (@types) {
            if (defined($usertypes->{$type})) {
                $typecount ++;
                $css_class = $typecount%2?' class="LC_odd_row"':'';
                $datatable .= '<tr'.$css_class.'>'. 
                              '<td>'.$usertypes->{$type}.'</td>'.
                              '<td class="LC_right_item"><nobr>'.
                              '<input type="text" name="quota_'.$type.
                              '" value="'.$settings->{$type}.
                              '" size="5" /> Mb</nobr></td></tr>';
            }
        }
        $othertitle = "Other users";
    }
    my $defaultquota = '20';
    if (ref($settings) eq 'HASH') {
        if (defined($settings->{'default'})) {
            $defaultquota = $settings->{'default'};
        }
    }
    $typecount ++;
    $css_class = $typecount%2?' class="LC_odd_row"':'';
    $datatable .= '<tr'.$css_class.'>'.
                  '<td>'.&mt($othertitle).'</td>'.
                  '<td class="LC_right_item"><nobr>'.
                  '<input type="text" name="default" value="'.
                  $defaultquota.'" size="5" /> Mb</nobr></td></tr>';
    return $datatable;
}

sub print_autoenroll {
    my ($dom,$settings) = @_;
    my $defdom = $dom;
    my $autorun = &Apache::lonnet::auto_run(undef,$dom),
    my ($runon,$runoff);
    if (ref($settings) eq 'HASH') {
        if (exists($settings->{'run'})) {
            if ($settings->{'run'} eq '0') {
                $runoff = ' checked="checked" ';
                $runon = ' ';
            } else {
                $runon = ' checked="checked" ';
                $runoff = ' ';
            }
        } else {
            if ($autorun) {
                $runon = ' checked="checked" ';
                $runoff = ' ';
            } else {
                $runoff = ' checked="checked" ';
                $runon = ' ';
            }
        }
        if (exists($settings->{'sender_domain'})) {
            $defdom = $settings->{'sender_domain'};
        }
    }
    my $domform = &Apache::loncommon::select_dom_form($defdom,'sender_domain',1);
    my $datatable='<tr class="LC_odd_row">'.
                  '<td>'.&mt('Auto-enrollment active?').'</td>'.
                  '<td class="LC_right_item"><nobr>'.
                  '<input type="radio" name="autoenroll_run"'.
                  $runon.' value="1" />'.&mt('Yes').'&nbsp;'.
                  '<input type="radio" name="autoenroll_run"'.
                  $runoff.'value="0" />'.&mt('No').'</nobr></td>'.
                  '</tr><tr>'.
                  '<td>'.&mt('Notification messages - sender').
                  '</td><td class="LC_right_item"><nobr>'.
                  &mt('username').':&nbsp;'.
                  '<input type="text" name="sender_uname" value="'.
                  $settings->{'sender_uname'}.
                  '" size="10" />&nbsp;&nbsp;'.&mt('domain').
                  ':&nbsp;'.$domform.'</nobr></td></tr>';
    return $datatable;
}

sub print_autoupdate {
    my ($position,$dom,$settings) = @_;
    my $datatable;
    if ($position eq 'top') {
        my $updateon = ' ';
        my $updateoff = ' checked="checked" ';
        my $classlistson = ' ';
        my $classlistsoff = ' checked="checked" ';
        if (ref($settings) eq 'HASH') {
            if ($settings->{'run'} eq '1') {
                $updateon = $updateoff;
                $updateoff = ' ';
            }
            if ($settings->{'classlists'} eq '1') {
                $classlistson = $classlistsoff;
                $classlistsoff = ' ';
            }
        }
        my %title = (
                   run => 'Auto-update active?',
                   classlists => 'Update information in classlists?',
                    );
        $datatable = '<tr class="LC_odd_row">'. 
                  '<td>'.&mt($title{'run'}).'</td>'.
                  '<td class="LC_right_item"><nobr>'.
                  '<input type="radio" name="autoupdate_run"'.
                  $updateon.' value="1" />'.&mt('Yes').'&nbsp;'.
                  '<input type="radio" name="autoupdate_run"'.
                  $updateoff.'value="0" />'.&mt('No').'</nobr></td>'.
                  '</tr><tr>'.
                  '<td>'.&mt($title{'classlists'}).'</td>'.
                  '<td class="LC_right_item"><nobr>'.
                  '<input type="radio" name="classlists"'.
                  $classlistson.' value="1" />'.&mt('Yes').'&nbsp;'.
                  '<input type="radio" name="classlists"'.
                  $classlistsoff.'value="0" />'.&mt('No').'</nobr></td>'.
                  '</tr>';
    } else {
        my ($usertypes,$order) = &Apache::lonnet::retrieve_inst_usertypes($dom);
        my @types;
        if (ref($order) eq 'ARRAY') {
            @types = @{$order};
        }
        if (@types == 0) {
            if (ref($usertypes) eq 'HASH') {
                @types = sort(keys(%{$usertypes}));
            }
        }
        my $othertitle = &mt('All users');
        if (keys(%{$usertypes}) > 0) {
            $othertitle = &mt('Other users');
        }
        my @fields = ('lastname','firstname','middlename','gen','email','id');
        my %fieldtitles = &Apache::lonlocal::texthash (
                            id => 'Student/Employee ID',
                            email => 'E-mail address',
                            lastname => 'Last Name',
                            firstname => 'First Name',
                            middlename => 'Middle Name',
                            gen => 'Generation',
                      );
        my $numrows = 0;
        if (@types > 0) {
            $datatable = 
                &usertype_update_row($settings,$usertypes,\%fieldtitles,
                                     \@fields,\@types,\$numrows);
        }
        $datatable .= 
            &usertype_update_row($settings,{'default' => $othertitle},
                                 \%fieldtitles,\@fields,['default'],
                                 \$numrows);
    }
    return $datatable;
}

sub usertype_update_row {
    my ($settings,$usertypes,$fieldtitles,$fields,$types,$rownums) = @_;
    my $datatable;
    my $numinrow = 4;
    foreach my $type (@{$types}) {
        if (defined($usertypes->{$type})) {
            $$rownums ++;
            my $css_class = $$rownums%2?' class="LC_odd_row"':'';
            $datatable .= '<tr'.$css_class.'><td>'.$usertypes->{$type}.
                          '</td><td class="LC_left_item"><table>';
            for (my $i=0; $i<@{$fields}; $i++) {
                my $rem = $i%($numinrow);
                if ($rem == 0) {
                    if ($i > 0) {
                        $datatable .= '</tr>';
                    }
                    $datatable .= '<tr>';
                }
                my $check = ' ';
                if (ref($settings->{'fields'}) eq 'HASH') {
                    if (ref($settings->{'fields'}{$type}) eq 'ARRAY') {
                        if (grep(/^\Q$fields->[$i]\E$/,@{$settings->{'fields'}{$type}})) {
                            $check = ' checked="checked" ';
                        }
                    }
                }

                if ($i == @{$fields}-1) {
                    my $colsleft = $numinrow - $rem;
                    if ($colsleft > 1) {
                        $datatable .= '<td colspan="'.$colsleft.'">';
                    } else {
                        $datatable .= '<td>';
                    }
                } else {
                    $datatable .= '<td>';
                }
                $datatable .= '<nobr><input type="checkbox" name="updateable_'.
                              $type.'_'.$fields->[$i].'" '.
                              '" value="1"'.$check.'/>'.
                              $fieldtitles->{$fields->[$i]}.'</nobr></td>';
            }
            $datatable .= '</tr></table></td></tr>';
        }
    }
    return $datatable;
}

sub modify_login {
    my ($dom,%domconfig) = @_;
    my ($resulttext,%changes);
    my %title = ( coursecatalog => 'Display course catalog',
                  adminmail => 'Display administrator E-mail address');
    my @offon = ('off','on');
    my %loginhash =  (
                       login => { coursecatalog => $env{'form.coursecatalog'},
                                  adminmail => $env{'form.adminmail'},
                                }
                     );
    my $putresult = &Apache::lonnet::put_dom('configuration',\%loginhash,
                                             $dom);
    if ($putresult eq 'ok') {
        if (($domconfig{'login'}{'coursecatalog'} eq '0') &&
            ($env{'form.coursecatalog'} eq '1')) {
            $changes{'coursecatalog'} = 1;
        } elsif (($domconfig{'login'}{'coursecatalog'} eq '' ||
                 $domconfig{'login'}{'coursecatalog'} eq '1') &&
                 ($env{'form.coursecatalog'} eq '0')) {
            $changes{'coursecatalog'} = 1;
        }
        if (($domconfig{'login'}{'adminmail'} eq '1') &&
                ($env{'form.adminmail'} eq '0')) {
            $changes{'adminmail'} = 1;
        } elsif (($domconfig{'login'}{'adminmail'} eq '' ||
                 $domconfig{'login'}{'adminmail'} eq '0') &&
                 ($env{'form.adminmail'} eq '1')) {
            $changes{'adminmail'} = 1;
        }
        if (keys(%changes) > 0) {
            $resulttext = &mt('Changes made:').'<ul>';
            foreach my $item (sort(keys(%changes))) {
                $resulttext .= '<li>'.&mt("$title{$item} set to $offon[$env{'form.'.$item}]").'</li>';
            }
            $resulttext .= '</ul>';
        } else {
            $resulttext = &mt('No changes made to log-in page settings');
        }
    } else {
        $resulttext = &mt('An error occurred: [_1]',$putresult);
    }
    return $resulttext;
}

sub modify_quotas {
    my ($dom,%domconfig) = @_;
    my ($resulttext,%changes);
    my ($usertypes,$order) = 
        &Apache::lonnet::retrieve_inst_usertypes($dom);
    my %formhash;
    foreach my $key (keys(%env)) {
        if ($key =~ /^form\.quota_(.+)$/) {
            $formhash{$1} = $env{$key};
        }
    }
    if (ref($domconfig{'quotas'}) eq 'HASH') {
        foreach my $key (keys(%{$domconfig{'quotas'}})) {
            if (exists($formhash{$key})) {
                if ($formhash{$key} ne $domconfig{'quotas'}{$key}) {
                    $changes{$key} = 1;
                }
            } else {
                $formhash{$key} = $domconfig{'quotas'}{$key};
            }
        }
    }
    foreach my $key (keys(%formhash)) {
        if ($formhash{$key} ne '') {
            if (!exists($domconfig{'quotas'}{$key})) {
                $changes{$key} = 1;
            }
        }
    }
    my %quotahash = (
                      quotas => {%formhash},
                    );
    my $putresult = &Apache::lonnet::put_dom('configuration',\%quotahash,
                                             $dom);
    if ($putresult eq 'ok') {
        if (keys(%changes) > 0) {
            $resulttext = &mt('Changes made:').'<ul>';
            foreach my $item (sort(keys(%changes))) {
                $resulttext .= '<li>'.&mt('[_1] set to [_2] Mb',$usertypes->{$item},$formhash{$item}).'</li>';
            }
            $resulttext .= '</ul>';
        } else {
            $resulttext = &mt('No changes made to default quotas');
        }
    } else {
        $resulttext = &mt('An error occurred: [_1]',$putresult);
    }
    return $resulttext;
}

sub modify_autoenroll {
    my ($dom,%domconfig) = @_;
    my ($resulttext,%changes);
    my %currautoenroll;
    if (ref($domconfig{'autoenroll'}) eq 'HASH') {
        foreach my $key (keys(%{$domconfig{'autoenroll'}})) {
            $currautoenroll{$key} = $domconfig{'autoenroll'}{$key};
        }
    }
    my $autorun = &Apache::lonnet::auto_run(undef,$dom),
    my %title = ( run => 'Auto-enrollment active',
                  sender => 'Sender for notification messages');
    my @offon = ('off','on');
    my %autoenrollhash =  (
                       autoenroll => { run => $env{'form.autoenroll_run'},
                                       sender_uname => $env{'form.sender_uname'},
                                       sender_domain => $env{'form.sender_domain'},

                                }
                     );
    my $putresult = &Apache::lonnet::put_dom('configuration',\%autoenrollhash,
                                             $dom);
    if ($putresult eq 'ok') {
        if (exists($currautoenroll{'run'})) {
             if ($currautoenroll{'run'} ne $env{'form.autoenroll_run'}) {
                 $changes{'run'} = 1;
             }
        } elsif ($autorun) {
            if ($env{'form.autoenroll_run'} ne '1') {
                $changes{'run'} = 1;
            }
        }
        if (exists($currautoenroll{sender_uname})) {
            if ($currautoenroll{'sender_uname'} ne $env{'form.sender_uname'}) {
                $changes{'sender'} = 1;
            }
        } else {
            $changes{'sender'} = 1;
        }
        if (exists($currautoenroll{sender_domain})) {
            if ($currautoenroll{'sender_domain'} ne $env{'form.sender_domain'}) {
                $changes{'sender'} = 1;
            }
        } else {
            $changes{'sender'} = 1;
        }
        if (keys(%changes) > 0) {
            $resulttext = &mt('Changes made:').'<ul>';
            if ($changes{'run'}) {
                $resulttext .= '<li>'.&mt("$title{'run'} set to $offon[$env{'form.autoenroll_run'}]").'</li>';
            }
            if ($changes{'sender'}) {
                $resulttext .= '<li>'.&mt("$title{'sender'} set to [_1]",$env{'form.sender_uname'}.':'.$env{'form.sender_domain'}).'</li>';
            }
            $resulttext .= '</ul>';
        } else {
            $resulttext = &mt('No changes made to auto-enrollment settings');
        }
    } else {
        $resulttext = &mt('An error occurred: [_1]',$putresult);
    }
    return $resulttext;
}

sub modify_autoupdate {
    my ($dom,%domconfig) = @_;
    my ($resulttext,%currautoupdate,%fields,%changes);
    if (ref($domconfig{'autoupdate'}) eq 'HASH') {
        foreach my $key (keys(%{$domconfig{'autoupdate'}})) {
            $currautoupdate{$key} = $domconfig{'autoupdate'}{$key};
        }
    }
    my @offon = ('off','on');
    my %title = &Apache::lonlocal::texthash (
                   run => 'Auto-update:',
                   classlists => 'Updates to user information in classlists?'
                );
    my ($usertypes,$order) = &Apache::lonnet::retrieve_inst_usertypes($dom);
    my %fieldtitles = &Apache::lonlocal::texthash (
                        id => 'Student/Employee ID',
                        email => 'E-mail address',
                        lastname => 'Last Name',
                        firstname => 'First Name',
                        middlename => 'Middle Name',
                        gen => 'Generation',
                      );
    my $othertitle = &mt('All users');
    if (keys(%{$usertypes}) >  0) {
        $othertitle = "Other users";
    }
    foreach my $key (keys(%env)) {
        if ($key =~ /^form\.updateable_(.+)_([^_]+)$/) {
            push(@{$fields{$1}},$2);
        }
    }
    my %updatehash = (
                      autoupdate => { run => $env{'form.autoupdate_run'},
                                      classlists => $env{'form.classlists'},
                                      fields => {%fields},
                                    }
                     );
    foreach my $key (keys(%currautoupdate)) {
        if (($key eq 'run') || ($key eq 'classlists')) {
            if (exists($updatehash{autoupdate}{$key})) {
                if ($currautoupdate{$key} ne $updatehash{autoupdate}{$key}) {
                    $changes{$key} = 1;
                }
            }
        } elsif ($key eq 'fields') {
            if (ref($currautoupdate{$key}) eq 'HASH') {
                foreach my $item (keys(%{$currautoupdate{$key}})) {
                    if (ref($currautoupdate{$key}{$item}) eq 'ARRAY') {
                        my $change = 0;
                        foreach my $type (@{$currautoupdate{$key}{$item}}) {
                            if (!exists($fields{$item})) {
                                $change = 1;
                            } elsif (ref($fields{$item}) eq 'ARRAY') {
                                if (!grep/^\Q$type\E$/,@{$fields{$item}}) {
                                    $change = 1;
                                }
                            }
                        }
                        if ($change) {
                            push(@{$changes{$key}},$item);
                        }
                    }
                }
            }
        }
    }
    foreach my $key (keys(%fields)) {
        if (ref($currautoupdate{'fields'}) eq 'HASH') {
            if (!exists($currautoupdate{'fields'}{$key})) {
                push(@{$changes{'fields'}},$key);
            }
        } else {
            push(@{$changes{'fields'}},$key);
        }
    }
    my $putresult = &Apache::lonnet::put_dom('configuration',\%updatehash,
                                             $dom);
    if ($putresult eq 'ok') {
        if (keys(%changes) > 0) {
            $resulttext = &mt('Changes made:').'<ul>';
            foreach my $key (sort(keys(%changes))) {
                if (ref($changes{$key}) eq 'ARRAY') {
                    foreach my $item (@{$changes{$key}}) {
                        my @newvalues;
                        foreach my $type (@{$fields{$item}}) {
                            push(@newvalues,$fieldtitles{$type});
                        }
                        my $newvaluestr;
                        if (@newvalues > 0) {
                            $newvaluestr = join(', ',@newvalues);
                        } else {
                            $newvaluestr = &mt('none');
                        }  
                        if ($item eq 'default') {
                            $resulttext .= '<li>'.&mt("Updates for $othertitle set to: [_1]",$newvaluestr).'</li>';
                        } else {
                            $resulttext .= '<li>'.&mt("Updates for [_1] set to: [_2]",$usertypes->{$item},$newvaluestr).'</li>';
                        }
                    }
                } else {
                    my $newvalue;
                    if ($key eq 'run') {
                        $newvalue = $offon[$env{'form.autoupdate_run'}];
                    } else {
                        $newvalue = $offon[$env{'form.'.$key}];
                    }
                    $resulttext .= '<li>'.&mt("[_1] set to $newvalue",$title{$key}).'</li>';
                }
            }
            $resulttext .= '</ul>';
        } else {
            $resulttext = &mt('No changes made to autoupdates');
        }
    } else {
        $resulttext = &mt('An error occurred: [_1]',$putresult);
    }
    return $resulttext;
}

1;