Basic implementation of shopping cart model logic using Node Express and in-memory model and DB.
A user should be able to:
- view and add products to a cart
- add and remove product items from the cart
- checkout the cart and add order details
A simple relational database model could be as follows:
App setup as follows
db // database persistence layer
L DB.js // temp stored in memory
L mongodb.js // TODO: add mongodb connection
model // CRUD and validation to DB
L validation // validate data before being written to DB (use JOI helper)
LineItem.js // CRUD functions
Product.js // CRUD functions
Order.js // CRUD functions
controller // API between interface and model. Responsible for serialization and any other logic required that is not specifcally related to direct CRUD operations
L serializers // serialize data appropriate for model
products.js // product controller
carts.js // cart controller (add/ remove LineItems and update qty if product exists) <- most logic here
orders.js // order controller (update LineItems assoc from cart to order)
webserver // Web interface
L routes // Express routes (handles sessions whcih are webserver specific) controller has no logic of sessions
server.js // Express application
util // Shared util helpers
L wrapper.js // wrap async await functions to fail safely- Architecture
- Model validation with JOI
- Products CRUD
- Line_Items CRUD
- Carts CRUD
- Web interface - Products Index
- Web interface - Cart (add and remove items)
- Web sessions for Cart
- Orders CRUD
- Web interface - Orders checkout