Biskot API is micro service responsible for managing the cart of an e-commerce website.

Before attempting to crunch the code, we strongly recommend you to carefully read each of the sections below:

• Implement the endpoints defined in the biskot.yaml api model. To better understand the model, we suggest you open the yaml file in a fancy UI available here.

To give you an idea of what is the expected result from each endpoint looks like, below some examples:

action: POST /carts

response http code: 200

action: GET /carts/{cartId}

response http code: 200

response body:

{
 "id": 1,
 "items": [
   {
     "product_id": 1,
     "product_label": "Déodorant Spray 200ml Ice Dive ADIDAS",
     "quantity": 2,
     "unit_price": 2.00,
     "line_price": 2.00
   }
 ],
 "totalPrice": 4.00
}
>```

action: PUT /carts/{cartId}/items

request body:

{
   "product_id": 1,
   "quantity": 2
 }

response http code: 200

• Added quantity of a product should not exceed the stock availability
• Total price of the cart should not exceed 100 euros
• A cart cannot contain more than 3 different products

• Carts could be persisted in memory using an embedded db or a collection of you choice inside InMemoryCartRepository
• Biskot has a dependency with an external service allowing you to get products information. The interactions with this external service should be implemented in ProductGateway
• As long as you respect the exercise goal, you have complete freedom to apply as many coding practices or external libraries as you see fit.

• The Java contract classes as well as the api interface can be generated using the openapi-generator-maven-plugin configured in pom.xml file
• A mock server has already been configured in ProductMockServer from which products can be retrieved calling: GET http://localhost:9001/products/{productId} (productId ranges from 1 to 4)
• The project is structured using hexagonal architecture, so please be aware to implement all layers (you will find // TODO: to be implemented comments when expect you to provide an implementation).

When you feel confident with your implementation, please push your work in a source code management of your choice and share it with us.

Happy Coding. Good luck!