public void AddProduct(string name, int quantity = 0, double price = 0, int offerId = 0)
{
// Check if existing basket item using the product name as reference
BasketItem basketItem = BasketItems.FirstOrDefault(item => item.ProductName == name);
if (basketItem == null)
{
// Create new instance of Offer class with default parameters
Offer linkedOffer = new Offer();
// If offerId is not set, ignore discount and discount group
if (offerId != 0)
{
linkedOffer = Offers.Find(offer => offer.OfferId == offerId);
}
// if does not exist, instantiate new BasketItem with passed parameters
BasketItem newProduct = new BasketItem(name, price, quantity, linkedOffer);
BasketItems.Add(newProduct);
}
else
{
// If the product already exists in the basket, just increase the quantity
basketItem.AddItems(quantity);
}
}