public function total($what = 'marks', $start = null, $finish = null)
{
parent::redirectIfWebView();
$method = 'total' . ucwords($what);
if (method_exists($this, $method)) {
$start = empty($start) ? 'today' : strtolower($start);
$finish = empty($finish) ? 'tomorrrow' : strtolower($finish);
$this->data['total'] = $this->{$method}($start, $finish);
parent::renderJSON();
} else {
$this->data['errors'] = formatErrors(404);
}
parent::renderJSON();
}
