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Yukinu

View Shopping Cart

This use case describes how a customer can view the contents of their current shopping cart, including all items and the total cost.

Pre-condition

  • The user is authenticated and has a valid user ID.

Post-condition

  • A list of all items in the user’s cart, along with the calculated total amount, is returned.
  • If no cart exists, an empty cart is implicitly created for the user.

Actors

  • Main actor: Customer.
  • Secondary actor: System.

Basic flow

Actor System
1. Requests to view their shopping cart.  
  2. Retrieves the user’s pending order, which functions as their cart. If one does not exist, the system creates it first.
  3. Fetches all items associated with the cart, including their product details.
  4. Calculates the total amount by summing up the price of each item multiplied by its quantity.
  5. Returns the list of cart items and the final total amount.

Add Item to Shopping Cart

This use case outlines how a customer adds a product or a specific product variant to their shopping cart.

Pre-condition

  • The user is authenticated and has a valid user ID.
  • The product variant to be added exists in the system.

Post-condition

  • The specified item is added to the user’s shopping cart with the given quantity and price.

Actors

  • Main actor: Customer.
  • Secondary actor: System.

Basic flow

Actor System
1. Submits a request to add an item, providing the product variant ID, quantity, and unit price.  
  2. Retrieves the user’s pending order (cart), creating one if it doesn’t exist.
  3. Creates a new order item and associates it with the user’s cart.
  4. Confirms that the item has been added and returns the ID of the newly created cart item.

Remove Item from Shopping Cart

This use case describes how a customer can remove a specific item from their shopping cart.

Pre-condition

  • The user is authenticated and has a valid user ID.
  • The item to be removed exists in the user’s shopping cart.

Post-condition

  • The specified item is removed from the shopping cart.

Actors

  • Main actor: Customer.
  • Secondary actor: System.

Basic flow

Actor System
1. Submits a request to remove an item by providing the item’s ID.  
  2. Retrieves the user’s pending order (cart).
  3. Verifies that the item to be removed belongs to the user’s cart.
  4. Deletes the item from the cart.
  5. Confirms the deletion was successful and returns the ID of the removed item.