Piwik\Plugin\Controller::getValidDate PHP Method

    private function getValidDate(Date $date, Date $minDate, Date $maxDate)
    {
        if ($date->isEarlier($minDate)) {
            $date = $minDate;
        }
        if ($date->isLater($maxDate)) {
            $date = $maxDate;
        }
        return $date;
    }