A DDD shopping cart application focused on separation of concerns and scalability.

Main concepts for this architecture are around codebase scalability. The goal is to provide a clean architecture while flexible for implementing and growing functionalities into the codebase.

Everything is highly testable, given low coupling with clear dependency graphs provided by Inversion of Control.

.
└── src
    ├── api # Layer that exposes application to external world (primary adapters)
    │   └── http # Exposes application over HTTP protocol
    ├── app # Layer that composes application use cases
    ├── domain # Business domain classes and everything that composes domain model
    ├── infra # Communication with what is external of application
    └── libs # Common functionalities

POST http://localhost:3000/item

{
  "sku": "AS-1234",
  "displayName": "My first item",
  "price": 100
}

GET http://localhost:3000/item

• If shopping cart doesn't exist, it is going to be created.
• If itemId already exists, quantity for existing item in the cart will be increased.

POST http://localhost:3000/cart/1/item

{
  "itemId": "ck0r5ypdz0000ppo73m4o8hfa",
  "quantity": 1
}

DELETE http://localhost:3000/cart/1/item/ck0r46c9w0000y9o70hvh605j

POST http://localhost:3000/cart/1/clean