# The LearningOnline Network with CAPA
# Handler to set domain-wide configuration settings
#
# $Id: lonconfigsettings.pm,v 1.6 2009/08/23 17:21:22 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::lonconfigsettings;

use strict;
use Apache::lonnet;
use Apache::loncommon();
use Apache::lonhtmlcommon();
use Apache::lonlocal;

sub print_header {
    my ($r,$phase,$context,$jscript) = @_;
    my ($pagetitle,$brcrumtitle,$action);
    if ($context eq 'domain') {
        ($pagetitle, $brcrumtitle) = ('View/Modify Domain Settings','Domain Settings');
        $action = '/adm/domainprefs';
    } else {
        ($pagetitle, $brcrumtitle) = ('Course Configuration','Course Configuration');
        $action = '/adm/courseprefs';
    }
    my $alert = &mt('You must select at least one functionality type to display.');
    my $js = '
<script type="text/javascript">
// <![CDATA[

function changePage(formname,newphase) {
    formname.phase.value = newphase;
    numchecked = 0;
    if (formname == document.pickactions) {
        if (formname.actions.length > 0) {
            for (var i = 0; i<formname.actions.length; i++) {
                if (formname.actions[i].checked) {
                    numchecked ++;
                }
            }
        } else {
            if (formname.actions.checked) {
                numchecked ++;
            }
        }
        if (numchecked > 0) {
            formname.submit();
        } else {
            alert("'.$alert.'");
            return;
        }
    }
    formname.submit();
}'."\n";
    if ($phase eq 'pickactions') {
        $js .=
            &Apache::lonhtmlcommon::set_form_elements({actions => 'checkbox',numcols => 'radio',})."\n".
            &javascript_set_colnums();
    } elsif ($phase eq 'display') {
        $js .= &color_pick_js()."\n";
    }
    $js .= &Apache::loncommon::viewport_size_js().'

// ]]>
</script>
';
    if ($jscript) {
        $js .= "

$jscript

";
    }
    my $additem;
    if ($phase eq 'pickactions') {
        my %loaditems = (
                    'onload' => "javascript:getViewportDims(document.$phase.width,document.$phase.height);setDisplayColumns();setFormElements(document.pickactions);",
                        );
        $additem = {'add_entries' => \%loaditems,};
    } else {
        my %loaditems = (
                    'onload' => "javascript:getViewportDims(document.$phase.width,document.$phase.height);",
                        );
        $additem = {'add_entries' => \%loaditems,};
    }
    $r->print(&Apache::loncommon::start_page($pagetitle,$js,$additem));
    $r->print(&Apache::lonhtmlcommon::breadcrumbs($brcrumtitle));
    $r->print('
<form name="parmform" action="">
<input type="hidden" name="pres_marker" />
<input type="hidden" name="pres_type" />
<input type="hidden" name="pres_value" />
</form>
');
    $r->print('<form method="post" name="'.$phase.'" action="'.$action.'"'.
              ' enctype="multipart/form-data">');
    return;
}

sub print_footer {
    my ($r,$phase,$newphase,$button_text,$actions) = @_;
    $button_text = &mt($button_text);
    $r->print('<input type="hidden" name="phase" value="" />'.
              '<input type="hidden" name="width" value="'.
              $env{'form.width'}.'" />'.
              '<input type="hidden" name="height" value="'.
              $env{'form.height'}.'" />');
    if (defined($env{'form.origin'})) {
        $r->print('<input type="hidden" name="origin" value="'.$env{'form.origin'}.'" />'."\n");
    }
    if (($phase eq 'display') || ($phase eq 'process')) {
        if (ref($actions) eq 'ARRAY') {
            foreach my $item (@{$actions}) {
                $r->print('<input type="hidden" name="actions" value="'.$item.'" />')."\n";
            }
        }
        $r->print('<input type="hidden" name="numcols" value="'.$env{'form.numcols'}.'" />');
    }
    my $dest='"javascript:changePage(document.'.$phase.','."'$newphase'".')"';
    if ($phase eq 'process') {
        $r->print('<p><a href='.$dest.'>'.$button_text.'</a></p>');
    } else {
        my $onclick;
        if ($phase eq 'display') {
            $onclick = '"javascript:changePage(document.'.$phase.','."'$newphase'".')"';
        } else {
            $onclick = '"javascript:changePage(document.'.$phase.','."'$newphase'".')"';
        }
        $r->print('<p><input type="button" name="store" value="'.
                  $button_text.'" onclick='.$onclick.' /></p>');
    }
    if ($phase eq 'process') {
        $r->print('</form>'.&Apache::loncommon::end_page());
    }
    return;
}

sub make_changes {
    my ($r,$dom,$phase,$context,$prefs_order,$prefs,$values,$confname,$roles,$allitems) = @_;
    my %brcrumtext = &get_crumb_text();
    my @actions = &Apache::loncommon::get_env_multiple('form.actions');
    my ($numchanged,%changes,%disallowed);
    &Apache::lonhtmlcommon::add_breadcrumb
      ({href=>"javascript:changePage(document.$phase,'display')",
        text=>$brcrumtext{$context}},
       {href=>"javascript:changePage(document.$phase,'$phase')",
        text=>"Updated"});
    &print_header($r,$phase,$context);
    if ((ref($prefs_order) eq 'ARRAY') && (ref($prefs) eq 'HASH') && 
        (ref($prefs) eq 'HASH')) {
        foreach my $item (@{$prefs_order}) {
            if (grep(/^\Q$item\E$/,@actions)) {
                if ($context eq 'domain') {
                    $r->print('<h3>'.&mt($prefs->{$item}{'text'}).'</h3>'.
                              &Apache::domainprefs::process_changes($r,$dom,
                                          $confname,$item,$roles,$values,));
                } else {
                    $changes{$item} = {};
                    &Apache::courseprefs::process_changes($dom,$item,$values,
                                                          $prefs->{$item},$changes{$item},
                                                          $allitems,\%disallowed);
                    if (keys(%{$changes{$item}}) > 0) {
                        $numchanged ++;
                    }
                }
            }
        }
    }
    if ($context eq 'course') {
        if ($numchanged) {
            $r->print(&Apache::courseprefs::store_changes($dom,$confname,$prefs_order,\@actions,
                                                          $prefs,$values,\%changes));
        } else {
            $r->print(&mt('No changes made to course configuration.'));
        }
        if (keys(%disallowed) > 0) {
            $r->print('<p>');
            foreach my $item ('cloners','rolenames','feedback','discussion','localization') {
                if (ref($disallowed{$item}) eq 'HASH') {
                    if (keys(%{$disallowed{$item}}) > 0) {
                        $r->print(&Apache::courseprefs::display_disallowed($item,$disallowed{$item},
                                                                           $prefs));
                    }
                }
            }
            $r->print('</p>');
        }
    }
    $r->print('<p>');
    my $footer_text = 'Back to configuration display';
    if ($context eq 'course') {
        $footer_text = 'Back to display/edit settings'; 
    }
    &print_footer($r,$phase,'display',$footer_text,\@actions);
    $r->print('</p>');
}

sub display_settings {
    my ($r,$dom,$phase,$context,$prefs_order,$prefs,$values,$confname,$jscript,
        $allitems) = @_;
    my %brcrumtext = &get_crumb_text();
    my @actions = &Apache::loncommon::get_env_multiple('form.actions');
    &Apache::lonhtmlcommon::add_breadcrumb
        ({href=>"javascript:changePage(document.$phase,'display')",
          text=>"Display/Edit Settings"});
    &print_header($r,$phase,$context,$jscript);
    if ((ref($prefs_order) eq 'ARRAY') && (ref($prefs) eq 'HASH') && (ref($values) eq 'HASH')) { 
        if (@actions > 0) {
            my $rowsum = 0;
            my (%output,%rowtotal,@items);
            my $halfway = @actions/2;
            foreach my $item (@{$prefs_order}) {
                if (grep(/^\Q$item\E$/,@actions)) {
                    push(@items,$item);
                    if ($context eq 'domain') {
                        ($output{$item},$rowtotal{$item}) =
                            &Apache::domainprefs::print_config_box($r,$dom,$confname,
                                $phase,$item,$prefs->{$item},$values->{$item});
                    } else {
                        ($output{$item},$rowtotal{$item}) =
                            &Apache::courseprefs::print_config_box($r,$dom,$phase,
                                $item,$prefs->{$item},$values,$allitems);
                    }
                    $rowsum += $rowtotal{$item};
                }
            }
            my $colend;
            my $halfway = $rowsum/2;
            my $aggregate = 0;
            my $sumleft = 0;
            my $sumright = 0;
            my $crossover;
            for (my $i=0; $i<@items; $i++) {
                $aggregate += $rowtotal{$items[$i]};
                if ($aggregate > $halfway) {
                    $crossover = $i;
                    last;
                }
            }
            for (my $i=0; $i<$crossover; $i++) {
                $sumleft += $rowtotal{$items[$i]};
            }
            for (my $i=$crossover+1; $i<@items; $i++) {
                $sumright += $rowtotal{$items[$i]};
            }
            if ((@items > 1) && ($env{'form.numcols'} == 2)) {
                my $sumdiff = $sumright - $sumleft;
                if ($sumdiff > 0) {
                    $colend = $crossover + 1;
                } else {
                    $colend = $crossover;
                }
            } else {
                $colend = @items;
            }
            $r->print('<p><table class="LC_double_column"><tr><td class="LC_left_col">');            for (my $i=0; $i<$colend; $i++) {
                $r->print($output{$items[$i]});
            }
            $r->print('</td><td></td><td class="LC_right_col">');
            if ($colend < @items) {
                for (my $i=$colend; $i<@items; $i++) {
                    $r->print($output{$items[$i]});
                }
            }
            $r->print('</td></tr></table></p>');
            $r->print(&print_footer($r,$phase,'process','Save',\@actions));
        } else {
            $r->print('<input type="hidden" name="phase" value="" />'.
                  '<input type="hidden" name="numcols" value="'.
                  $env{'form.numcols'}.'" />'."\n".
                  '<span class="LC_error">'.&mt('No settings chosen').
                  '</span>');
        }
        $r->print('</form>');
    }
    $r->print(&Apache::loncommon::end_page());
    return;
}

sub display_choices {
    my ($r,$phase,$context,$prefs_order,$prefs) = @_;
    if ($phase eq '') {
        $phase = 'pickactions';
    }
    my %helphash;
    &print_header($r,$phase,$context);
    $r->print('<h3>'.&mt('Settings to display/modify').'</h3>');
    $r->print('<script type="text/javascript">'."\n".
              '// <![CDATA['."\n".
              &Apache::loncommon::check_uncheck_jscript()."\n".
              '// ]]>'."\n".
              '</script>'."\n".'<p><input type="button" value="'.&mt('check all').'" '.
              'onclick="javascript:checkAll(document.pickactions.actions)"'.
              ' />'.('&nbsp;'x2).
              '<input type="button" value="'.&mt('uncheck all').'" '.
              'onclick="javascript:uncheckAll(document.pickactions.actions)"'.
              ' /></p><div class="LC_left_float">');
    my ($numitems,$midpoint,$seconddiv,$count);
    if (ref($prefs_order) eq 'ARRAY') {
        $numitems = @{$prefs_order};
    }
    $midpoint = int($numitems/2);
    if ($numitems%2) {
        $midpoint ++;
    }
    $count = 0;
    if ((ref($prefs_order) eq 'ARRAY') && (ref($prefs) eq 'HASH')) {
        foreach my $item (@{$prefs_order}) {
            $r->print('<h4>'.
                      &Apache::loncommon::help_open_topic($prefs->{$item}->{'help'}).
                      '<label><input type="checkbox" name="actions" value="'.$item.
                      '" />&nbsp;'.&mt($prefs->{$item}->{'text'}).'</label></h4>');
            $count ++;
            if ((!$seconddiv) && ($count >= $midpoint)) {
                $r->print('</div>'."\n".'<div class="LC_left_float">'."\n");
                $seconddiv = 1;
            }
        }
        $r->print('</div><div class="LC_clear_float_footer"></div><h3>'.
                  &mt('Display options').'</h3>'."\n".
                  '<p><span class="LC_nobreak">'.&mt('Display using: ')."\n".
                  '<label><input type="radio" name="numcols" value="1" />'.
                  &mt('one column').'</label>&nbsp;&nbsp;<label>'.
                  '<input type="radio" name="numcols" value="2" />'.
                  &mt('two columns').'</label></span></p>');
    }
    $r->print(&print_footer($r,$phase,'display','Go'));
    $r->print('</form>');
    $r->print(&Apache::loncommon::end_page());
    return;
}

sub javascript_set_colnums {
    return <<END;
function setDisplayColumns() {
    if (document.pickactions.width.value > 1100) {
        document.pickactions.numcols[1].checked = true;
    } else {
        document.pickactions.numcols[0].checked = true;
    }
}
END
}

sub color_pick_js {
    my $pjump_def = &Apache::lonhtmlcommon::pjump_javascript_definition();
    my $output = <<"ENDCOL";
    function pclose() {
        parmwin=window.open("/adm/rat/empty.html","LONCAPAparms","height=350,width=350,scrollbars=no,menubar=no");
        parmwin.close();
    }

    $pjump_def

    function psub() {
        pclose();
        if (document.parmform.pres_marker.value!='') {
            if (document.parmform.pres_type.value!='') {
                eval('document.display.'+
                     document.parmform.pres_marker.value+
                     '.value=document.parmform.pres_value.value;');
            }
        } else {
            document.parmform.pres_value.value='';
            document.parmform.pres_marker.value='';
        }
    }

    function get_id (span_id) {
        if (document.getElementById) {
            return document.getElementById(span_id);
        }
        if (document.all) {
            return document.all[span_id];
        }
        return false;
    }

    function colchg_span (span_id_str,new_color_item) {
        var span_ref = get_id(span_id_str);
        if (span_ref.style) { span_ref = span_ref.style; }
        span_ref.background = new_color_item.value;
        span_ref.backgroundColor = new_color_item.value;
        span_ref.bgColor = new_color_item.value;
    }

ENDCOL
    return $output;
}

sub get_crumb_text {
    my %brcrumbtext = (
                       domain => 'Domain Settings',
                       course => 'Display/Edit Settings',
                     );
    return %brcrumbtext;
}

1;