public function __construct(attendance $att)
 {
     $this->statuses = $att->get_statuses(false);
     foreach ($this->statuses as $st) {
         $st->haslogs = att_has_logs_for_status($st->id);
     }
     $this->att = $att;
 }
    require_sesskey();
}
switch ($att->pageparams->action) {
    case att_preferences_page_params::ACTION_ADD:
        $newacronym = optional_param('newacronym', null, PARAM_TEXT);
        $newdescription = optional_param('newdescription', null, PARAM_TEXT);
        $newgrade = optional_param('newgrade', 0, PARAM_RAW);
        $newgrade = unformat_float($newgrade);
        $att->add_status($newacronym, $newdescription, $newgrade);
        if ($pageparams->statusset > $maxstatusset) {
            $maxstatusset = $pageparams->statusset;
            // Make sure the new maximum is shown without a page refresh.
        }
        break;
    case att_preferences_page_params::ACTION_DELETE:
        if (att_has_logs_for_status($att->pageparams->statusid)) {
            print_error('cantdeletestatus', 'attendance', "attsettings.php?id={$id}");
        }
        $confirm = optional_param('confirm', null, PARAM_INT);
        $statuses = $att->get_statuses(false);
        $status = $statuses[$att->pageparams->statusid];
        if (isset($confirm)) {
            $att->remove_status($status);
            redirect($att->url_preferences(), get_string('statusdeleted', 'attendance'));
        }
        $message = get_string('deletecheckfull', '', get_string('variable', 'attendance'));
        $message .= str_repeat(html_writer::empty_tag('br'), 2);
        $message .= $status->acronym . ': ' . ($status->description ? $status->description : get_string('nodescription', 'attendance'));
        $params = array_merge($att->pageparams->get_significant_params(), array('confirm' => 1));
        echo $OUTPUT->header();
        echo $OUTPUT->heading(get_string('attendanceforthecourse', 'attendance') . ' :: ' . format_string($course->fullname));