public ConditionDiscount Xor(ConditionDiscount d, bool decide)
{
Func <ShoppingBasket, DiscountOfProducts> f = new Func <ShoppingBasket, DiscountOfProducts>
((ShoppingBasket shoppingBasket) => XorHelper(shoppingBasket, this, d, decide)
);
return(new ConditionDiscount(new DiscountCalculator(f)));
}
public ConditionDiscount Or(IRule additionalRule)
{
ConditionDiscount discount = new ConditionDiscount(new DiscountCalculator(base.Calc));
IRule orRule = Rule.OrTwoRules(_rule, additionalRule);
discount.AddRule(orRule);
return(discount);
}
public DiscountOfProducts XorHelper(ShoppingBasket shoppingBasket, ConditionDiscount d1, ConditionDiscount d2, bool decide)
{
bool available1 = d1.Available(shoppingBasket);
bool available2 = d2.Available(shoppingBasket);
//if both discounts are available decide by the 'decide' value
if (available1 && available2)
{
if (decide)
{
return(d1.Calc.CalcDiscount(shoppingBasket));
}
else
{
return(d2.Calc.CalcDiscount(shoppingBasket));
}
}
else if (available1)
{
return(d1.Calc.CalcDiscount(shoppingBasket));
}
else
{
return(d2.ApplyDiscounts(shoppingBasket));
}
}