CRUD operations on items in shopping cart

[gallenc]

An independent shopping cart should be created for each user session.

• Shopping carts need not be persisted between sessions after the user logs out. However placed orders must be persisted.
• Users should be able to search and select items from the catalogue to add to their shopping cart,
• The shopping cart should present an itemised list of items in the cart,
• The shopping cart should keep a running total of the total cost of items in the cart.
• It should be possible to add, delete or modify the number of each item in the shopping art.