protected function updateTimeslots(Vacancy $vacancy)
 {
     $fromTime = $vacancy->start_at;
     $toTime = $vacancy->finish_at;
     $capacity = $vacancy->getAvailableCapacityBetween($fromTime->timezone('UTC'), $toTime->timezone('UTC'));
     $time = $fromTime->timezone($vacancy->business->timezone)->format('H:i:s');
     $this->timetable->capacity($vacancy->date, $time, $vacancy->service->slug, $capacity);
 }
 protected function updateTimeslots(Vacancy $vacancy, $step = 30)
 {
     $fromTime = $vacancy->start_at->timezone('UTC');
     $toTime = $fromTime->copy();
     $limit = $vacancy->finish_at;
     while ($fromTime <= $limit) {
         $toTime->addMinutes($step);
         $capacity = $vacancy->getAvailableCapacityBetween($fromTime, $toTime);
         $time = $fromTime->timezone($vacancy->business->timezone)->format('H:i:s');
         $this->timetable->capacity($vacancy->date, $time, $vacancy->service->slug, $capacity);
         $fromTime->addMinutes($step);
     }
 }