/// <summary>
/// Method to add those items to the cart, which will be priced based on their quantity.
/// If the same item availble it will only increase the quantity of that item.
/// </summary>
/// <param name="product">An instance of the prodoct needs to be added to the cart</param>
/// <param name="quantity">The countity of the added product</param>
public void AddQuantityItem(Product product, int quantity)
{
// Searching for the similar product inthe cart
LineItem item = _lineItems.FirstOrDefault(l => l.Product.ProductId == product.ProductId);
if (item == null)
{
_lineItems.Add(new QuantityItem(product, quantity));
}
else
{
((QuantityItem)item).Quantity += quantity;
}
}
/// <summary>
/// Method to add those items to the cart, which will be priced based on their weight.
/// </summary>
/// <param name="product">An instance of the prodoct needs to be added to the cart</param>
/// <param name="weight">The countity of the added product</param>
public void AddWeightItem(Product product, double weight)
{
_lineItems.Add(new WeightItem(product, weight));
}
public WeightItem(Product product, double weight)
: base(product)
{
Weight = weight;
}
public QuantityItem(Product product, int quantity)
: base(product)
{
Quantity = quantity;
}
protected LineItem(Product product)
{
Product = product;
}
/// <summary>
/// A method to remove an item from the cart
/// </summary>
/// <param name="product">The product that needs to be removed from the cart</param>
public void RemoveLineItem(Product product)
{
_lineItems.RemoveAll(l => l.Product.ProductId == product.ProductId);
}