Implement a shopping cart

We will continue working on our Cinema project.

• Create models
  • ShoppingCart
  • Ticket
• Create DAO
  • ShoppingCartDao

    public interface ShoppingCartDao {
        ShoppingCart add(ShoppingCart shoppingCart);
    
        Optional<ShoppingCart> getByUser(User user);
    
        void update(ShoppingCart shoppingCart);
    }

  • TicketDao. Hint: use this dao in the ShoppingCartService, method addSession

    public interface TicketDao {
        Ticket add(Ticket ticket);
    }

• Create service
  • TicketService is not required. TicketDao is enough.
  • ShoppingCartService

    public interface ShoppingCartService {
        /**
         * This method is responsible for adding a Ticket to the ShoppingCart
         * @param movieSession contains the information required for the ticket
         * @param user - the User who wants to buy the ticket for a specific movieSession
         */
        void addSession(MovieSession movieSession, User user);
    
        ShoppingCart getByUser(User user);
    
        void registerNewShoppingCart(User user);
    
        void clear(ShoppingCart shoppingCart);
    }

• In the mate/academy/Main.main() method create an instance of ShoppingCartService using injector and test all methods from it.

You can check yourself using this checklist

Model structure