private async Task JoinRunInternalAsync(long userId, Run run, long optionId, CallbackData callbackData)
{
BaseCommand command;
if (run.Ended)
{
throw new SlackTeaTimeException(ErrorStrings.JoinRun_RunEnded());
}
//check if we need to join or update
var existingOrder = await _mediator.Send(new GetUserOrderQuery(run.Id, userId)).ConfigureAwait(false);
if (existingOrder == null)
{
command = new CreateOrderCommand(
id: await _idGenerator.GenerateAsync().ConfigureAwait(false),
runId: run.Id,
userId: userId,
optionId: optionId);
}
else
{
//we need to update the existing order
command = new UpdateOrderOptionCommand(existingOrder.Id, userId, optionId);
}
command.AddCallbackState(callbackData);
await _mediator.Send(command).ConfigureAwait(false);
}
public async Task <Unit> Handle(UpdateOrderOptionCommand request, CancellationToken cancellationToken)
{
var existing = await _orderRepository.GetAsync(request.OrderId).ConfigureAwait(false);
if (existing.OptionId == request.OptionId)
{
return(Unit.Value);
}
//store the previous id for the event
var previousOptionId = existing.OptionId;
//update
existing.OptionId = request.OptionId;
await _orderRepository.UpdateAsync(existing).ConfigureAwait(false);
//create event
var evt = _mapper.Map <UpdateOrderOptionCommand, OrderOptionChangedEvent>(request);
evt.PreviousOptionId = previousOptionId;
await _eventPublisher.Publish(evt).ConfigureAwait(false);
return(Unit.Value);
}