public void Handle(TakeMarchandise command)
{
var stream = _eventStoreInMemory.GetAll(command.Id);
var domainEvents = Order.Decide(command, stream);
foreach (var domainEvent in domainEvents)
{
_eventPublisher.Publish(domainEvent, stream.Count);
}
}
public static IEnumerable <IDomainEvent> Decide(IDomainCommand command, IEnumerable <IDomainEvent> pastEvents)
{
var decisionProjection = new DecisionProjection();
foreach (var domainEvent in pastEvents)
{
decisionProjection.Apply(domainEvent);
}
var uncommittedEvents = command switch
{
StartOrder startOrder => Decide(startOrder, decisionProjection),
TakeMarchandise takeMarchandise => Decide(takeMarchandise, decisionProjection),
_ => new List <IDomainEvent>()
};
return(uncommittedEvents);
}
private static IEnumerable <IDomainEvent> Decide(TakeMarchandise takeMarchandise,
DecisionProjection decisionProjection)
{
if (decisionProjection.IsMarchandiseReceived)
{
return(new List <IDomainEvent>());
}
if (!decisionProjection.IsStarted)
{
return(new List <IDomainEvent>());
}
if (decisionProjection.NumberColisRemaining > takeMarchandise.ColisList.Count)
{
var numberColisRemaining = decisionProjection.NumberColisRemaining - takeMarchandise.ColisList.Count;
return(new List <IDomainEvent>
{
new MarchandisePartiallyReceived(takeMarchandise.Id, numberColisRemaining)
});
}
if (decisionProjection.NumberColisRemaining < takeMarchandise.ColisList.Count)
{
var numberColisExcess = takeMarchandise.ColisList.Count - decisionProjection.NumberColisRemaining;
return(new List <IDomainEvent>
{
new MarchandiseReceived(takeMarchandise.Id, decisionProjection.NumberColisRemaining),
new MarchandiseExcessReceived(takeMarchandise.Id, numberColisExcess)
});
}
return(new List <IDomainEvent> {
new MarchandiseReceived(takeMarchandise.Id, 0)
});
}
