public InventoryItem(ProductId productId, int quantity, decimal price)
{
this.ProductId = productId;
this.Quantity = quantity;
this.Price = price;
}
private InventoryItem GetProduct(ProductId productId)
{
return(this.items.Single(i => i.ProductId == productId));
}
public void Reserve(ProductId productId, int quantity)
{
GetProduct(productId).ReservedCount = quantity;
}
public decimal PriceFor(ProductId productId)
{
return(GetProduct(productId).Price);
}
public bool CheckAvailability(ProductId productId, int quantity)
{
return(AvailableQuantity(productId) >= quantity);
}
public void Add(ProductId productId, int quantity, decimal price)
{
this.items.Add(new InventoryItem(productId, quantity, price));
}