public void GrantBenefit(Visitor visitor, IVisitorHistoryRepository historyService, IPromotionCodeGenerator generator)
{
Require.IsTrue(IsActive, "Promotion is not active");
if (ReceiveCondition.IsSatisfiedFor(visitor, historyService))
{
Benefit.ApplyFor(visitor, generator);
DomainEventBus.Current.Raise(new PromotionGrantedForVisitor(Id, visitor.Id));
}
}
