public async Task CreateSeat(SeatType seat)
{
if (!await _conferenceRepository.CheckExistenceById(seat.ConferenceId))
{
throw new ApplicationException("Conference record wasn't found!");
}
await _seatRepository.AddConferenceSeat(seat);
var conference = await _conferenceRepository.Get(seat.ConferenceId);
// Don't publish new seats if the conference was never published
// (and therefore is not published either).
if (conference.WasEverPublished)
{
_hostServiceBus.Publish <ISeatCreated>(new SeatCreated(seat));
}
}