private function _prepareVisitTime(array $excludedReservations = array())
{
$this->_fromTime = MedOptima_DateTime::create($this->_data->visitDate . ' ' . $this->_data->visitTime);
if ($this->_fromTime->isToday()) {
throw new Exception('Can not make reservation for today');
}
$this->_toTime = clone $this->_fromTime;
$this->_toTime->addSeconds($this->_doctor->getMinReceptionDuration()->getTimestamp());
if (!$this->_doctor->getSchedule($this->_fromTime)->isAvailable($this->_fromTime, $this->_toTime, $excludedReservations)) {
throw new Exception('Doctor is not available at this time (' . $this->_fromTime->getGostDatetime() . ')');
}
}