public ShoppingBasket CreateBasketFromInput(string[] args, ProductsDL productsDL)
{
ShoppingBasket shoppingBasket = new ShoppingBasket();
// check data is valid first
if (productsDL == null)
{
throw new NoProductToBuyException("no products to purchase");
}
if (args == null || args.Length == 0)
{
return(shoppingBasket);
}
// read arguments
foreach (var arg in args)
{
string argToLower = arg.Trim().ToLower(CultureInfo.InvariantCulture);
Product product = productsDL.GetProductByName(name: argToLower);
if (product != null)
{
shoppingBasket.AddItem(product);
}
else
{
throw new InvalidInputException($"{argToLower} is not a valid product");
}
}
return(shoppingBasket);
}
internal int Delete()
{
try
{
using (ProductsDL _productsdlDL = new ProductsDL())
{
return(_productsdlDL.Delete(this));
}
}
catch (Exception)
{
throw;
}
}
internal int InsertAndGetId()
{
try
{
using (ProductsDL _productsdlDL = new ProductsDL())
{
return(_productsdlDL.InsertAndGetId(this));
}
}
catch (Exception)
{
throw;
}
}
public static SpecialOffersDL GetAppleBeansBreadSpecialOffers(ProductsDL productsDL)
{
// 10 % off apples
SpecialOfferRule apples10percentOff = new SpecialOfferRule(new SpecialOfferMatchRule(productsDL.GetProductByName("apple"), 1),
new SpecialOfferDiscountRule(productsDL.GetProductByName("apple"), 10));
// buy 2 cans of beans, get 1 loaf of bread 50% off
SpecialOfferRule twoCans1BreadLoaf = new SpecialOfferRule(new SpecialOfferMatchRule(productsDL.GetProductByName("beans"), 2),
new SpecialOfferDiscountRule(productsDL.GetProductByName("bread"), 50, 1));
SpecialOffersDL specialOffers = new SpecialOffersDL(new List <SpecialOfferRule>()
{
apples10percentOff, twoCans1BreadLoaf
});
return(specialOffers);
}
public static SpecialOffersDL GetSpecialOffers3oranges1applefree(ProductsDL products)
{
// buy 90 % off strawberries
SpecialOfferRule apples10percentOff = new SpecialOfferRule(
new SpecialOfferMatchRule(products.GetProductByName("Strawberries"), 1),
new SpecialOfferDiscountRule(products.GetProductByName("Strawberries"), 90));
// buy 3 oranges, get 1 apple for free
SpecialOfferRule threeOrangesOneAppleFree = new SpecialOfferRule(
new SpecialOfferMatchRule(products.GetProductByName("oranges"), 3),
new SpecialOfferDiscountRule(products.GetProductByName("apple"), 100, 1));
SpecialOffersDL specialOffers = new SpecialOffersDL(new List <SpecialOfferRule>()
{
apples10percentOff, threeOrangesOneAppleFree
});
return(specialOffers);
}
static void Main(string[] args)
{
try
{
// Create Product List for example in paper
ProductsDL productsDL = new ProductsDL(new List <Product>()
{
new Product(1, "Beans", 0.65m),
new Product(2, "Bread", 0.80m),
new Product(3, "Milk", 1.30m),
new Product(4, "Apple", "Apples", 1.00m)
});
// create special offers
// Offer 1: 10% off apples
SpecialOfferRule apples10percentOff = new SpecialOfferRule(
new SpecialOfferMatchRule(productsDL.GetProductByName("apple"), 1),
new SpecialOfferDiscountRule(productsDL.GetProductByName("apple"), 10));
// Offer 2: Buy 2 cans of beans get 1 loaf of bread 50 percent off
SpecialOfferRule twoCans1BreadLoaf = new SpecialOfferRule(
new SpecialOfferMatchRule(productsDL.GetProductByName("beans"), 2),
new SpecialOfferDiscountRule(productsDL.GetProductByName("bread"), 50, 1));
SpecialOffersDL specialOffersDL = new SpecialOffersDL(new List <SpecialOfferRule>()
{
apples10percentOff, twoCans1BreadLoaf
});
// process user imput with products and special offers
IAppMain appMain = new AppMain(productsDL, specialOffersDL);
string output = appMain.Process(args);
Console.WriteLine(output);
}
catch (Exception ex)
{
// log out error not just to console.
Console.WriteLine("Fatal Error occured: ", ex);
}
}
public AppMain(ProductsDL productsDL,
SpecialOffersDL specialOffersDL)
{
_productsDL = productsDL;
_specialOffersDL = specialOffersDL;
}