public async Task <ActionResult <Participant> > DeleteAsync(int participantId, CancellationToken cancellationToken)
{
using (var scope = new TransactionScope(TransactionScopeOption.Required))
{
var participant = await _context.Participants.FirstOrDefaultAsync(Participant.GetById(participantId), cancellationToken);
if (participant == null)
{
return(null);
}
Transaction.Current.EnlistVolatile(new TransactionEnlistmentNotification(() => _voteHub.ParticipantLeft(participant, cancellationToken)), EnlistmentOptions.None);
_context.Participants.Remove(participant);
await _context.SaveChangesAsync(cancellationToken);
var room = await _context.Rooms.Include(x => x.Participants).FirstOrDefaultAsync(Room.GetById(participant.RoomId), cancellationToken);
if (room == null)
{
return(participant);
}
if (!room.Participants.Any())
{
Transaction.Current.EnlistVolatile(new TransactionEnlistmentNotification(() => _voteHub.RoomDeleted(room, cancellationToken)), EnlistmentOptions.None);
_context.Rooms.Remove(room);
await _context.SaveChangesAsync(cancellationToken);
}
scope.Complete();
return(participant);
}
}