public void AddItem(Guid itemId, string name, decimal price)
{
CartItem cartItem = CartItems.Find(x => x.ItemId == itemId);
if (cartItem != null)
{
cartItem.Quantity += 1;
}
else
{
CartItems.Add(new CartItem(itemId, name, price, 1));
}
}
/// <summary>
/// Usunięcie elementu z koszyka na podstawie nr id
/// </summary>
/// <param name="id"></param>
public bool DeleteFromCartById(int id)
{
ElectronicDeviceViewModel temp = CartItems.Find(x => x.ID == id);
if (temp is null)
{
return(false);
}
TotalPrice -= temp.Price;
NumberOfElements--;
CartItems.Remove(temp);
return(true);
}
/// <summary>
/// 加入一项到购物车
/// </summary>
/// <param name="cartItem"></param>
public void Add(ShoppingCartItem cartItem)
{
lock (_sync)
{
//Add options logic here
ShoppingCartItem existsItem = CartItems.Find(p => p.SKU == cartItem.SKU);
if (existsItem != null)
{
existsItem.Quantity += cartItem.Quantity;
}
else
{
CartItems.Add(cartItem);
}
}
}
public int AddProduct(IProduct product, int amount = 1)
{
bool exist = CartProductIds.Contains(product.GetId());
if (exist)
{
ICartItem item = CartItems.Find(cartItem => cartItem.GetProduct().Equals(product));
if (item == null)
{
throw new InvalidOperationException("Item exist in HashSet but not in CartItems");
}
return(item.IncreaseAmountOn(amount));
}
CartProductIds.Add(product.GetId());
CartItems.Add(new CartItem(product, this, amount));
return(amount);
}
/// <summary>
/// 加入或更新购物车中的一项
/// </summary>
/// <param name="sku"></param>
/// <param name="quantity"></param>
public void AddorUpdate(string sku, int quantity)
{
lock (_sync)
{
ShoppingCartItem existsItem = CartItems.Find(p => p.SKU == sku);
if (existsItem != null)
{
existsItem.Quantity += quantity;
}
else
{
CartItems.Add(new ShoppingCartItem
{
SKU = sku,
Quantity = quantity
});
}
}
}
public int RemoveProduct(IProduct product, int amount = 1)
{
if (!CartProductIds.Contains(product.GetId()))
{
throw new InvalidOperationException("No such product in a cart");
}
ICartItem item = CartItems.Find(cartItem => cartItem.GetProduct().Equals(product));
if (item == null)
{
throw new InvalidOperationException("Item exist in HashSet but not in CartItems");
}
if (item.GetAmount() != amount)
{
return(item.DecreaseAmountOn(amount));
}
// here item should be deleted
CartProductIds.Remove(product.GetId());
CartItems.RemoveAll(cartItem => cartItem.GetProduct().Equals(product));
return(0);
}
/// <summary>
/// 从购物车中获取指定的商品
/// </summary>
/// <param name="sku">货品编号（唯一）</param>
/// <returns>返回购物车中指定SKU的商品</returns>
public ShoppingCartItem FindItem(string sku)
{
return(CartItems.Find(p => p.SKU == sku));
}
