/**
* AddItem() - Adds an item to the shopping
*/
public void AddItem(ENNewBook book)
{
// Create a new item to add to the cart
ENNewBook b = new ENNewBook(book.Id);
CartItem newItem = new CartItem(b);
// If this item already exists in our list of items, increase the quantity
// Otherwise, add the new item to the list
foreach (CartItem item in Items)
{
if (item.BookIsbn == book.IdBook)
{
item.Quantity++;
return;
}
}
newItem.Quantity = 1;
Items.Add(newItem);
}
/**
* Equals() - Needed to implement the IEquatable interface
* Tests whether or not this item is equal to the parameter
* This method is called by the Contains() method in the List class
* We used this Contains() method in the ShoppingCart AddItem() method
*/
public bool Equals(CartItem item)
{
return item.BookIsbn == this.BookIsbn;
}
/**
* RemoveItem() - Removes an item from the shopping cart
*/
public void RemoveItem(ENNewBook book)
{
CartItem removedItem = new CartItem(book);
foreach (var item in Items)
{
if (item.Equals(removedItem))
{
Items.Remove(item);
break;
}
}
}