public static ShopCar GetShopCarsBySituation(int situation)
{
string path = string.Format(@"C:\workspace\ShopCar\ShopCarApp\shopCar{0}.json", situation);
using (StreamReader r = new StreamReader(path))
{
string json = r.ReadToEnd();
List <ShopCarItem> shopCarItems = JsonConvert.DeserializeObject <List <ShopCarItem> >(json);
ShopCar shopCar = new ShopCar()
{
shopCarItems = shopCarItems,
dateTime = DateTime.Parse("2018-11-11")
};
return(shopCar);
}
}
public static double CalculatePrice(ref ShopCar shopCars, ref List <Product> products)
{
List <ShopCarItemProductMapping> shopCars1Join = (from sc in shopCars.shopCarItems
join p in products on sc.productId equals p.id
select new ShopCarItemProductMapping()
{
category = p.category,
totalPrice = p.price * sc.amount
}).ToList();
//條件一: 2018.11.11 當天 電子類商品一律 7 折
if (DateTime.Parse("2018-11-11") == shopCars.dateTime)
{
shopCars1Join.Where(w => w.category == 1).Select(s =>
{
return(s.totalPrice = s.totalPrice * 0.7);
}).ToList();
}
//條件二: 2018.11.01 ~ 2018.11.15 酒類商品一律 8 折
if (shopCars.dateTime >= DateTime.Parse("2018-11-01") && shopCars.dateTime <= DateTime.Parse("2018-11-15"))
{
shopCars1Join.Where(w => w.category == 4).Select(s =>
{
return(s.totalPrice = s.totalPrice * 0.8);
}).ToList();
}
double shopCars1TotalPrice = shopCars1Join.Select(s => s.totalPrice).Sum();
//條件三: 使用優惠券滿 1000 折 200，2019.3.2 到期
if (shopCars.dateTime < DateTime.Parse("2019-03-02") && shopCars1TotalPrice >= 1000)
{
shopCars1TotalPrice = shopCars1TotalPrice - 200;
}
return(shopCars1TotalPrice);
}
static void Main(string[] args)
{
List <Product> products = Resources.GetProducts();
#region 第一種狀況
ShopCar shopCars1 = Resources.GetShopCarsBySituation(1);
double shopCars1TotalPrice = Resources.CalculatePrice(ref shopCars1, ref products);
#endregion
#region 第二種狀況
ShopCar shopCars2 = Resources.GetShopCarsBySituation(2);
double shopCars2TotalPrice = Resources.CalculatePrice(ref shopCars2, ref products);
#endregion
Console.ReadLine();
}