pizza-toppings

Problem statement

The company aims to diversify its business by venturing into the food industry and opening a pizzeria. During the process of collaborating with various food supplier services in the area, it has become apparent that determining customer preferences for toppings is crucial for making informed decisions about ordering supplies.

Requirements

Develop an endpoint that enables customers to submit their email addresses along with a list of toppings they prefer.
Implement an endpoint that allows the front-end team to access the list of currently submitted toppings, including the number of unique customers who have requested each topping.
Ensure that only the most recent topping submission is recorded.
Build the application serving these endpoints using Kotlin and Spring Boot.

Bonus points:

Implement data persistence between application runs.
Demonstrate creativity by incorporating additional features.
Create a dedicated endpoint for displaying your personal topping choice.

How to run

./gradlew clean build -x test && docker compose up --build

API documentation will be available at http://localhost:8090.

Sample API requests

NOTE: You can authenticate with any email address using an empty password.

Update preferences

# john.smith@gmail.com
curl -i -X PUT 'localhost:8080/api/v1/user/preferences' \
  -H 'Authorization: Basic am9obi5zbWl0aEBnbWFpbC5jb206' \
  -H 'Content-Type: application/json' \
  --data '{"toppings":["bacon","mozzarella","pepperoni"]}'

# jane.doe@gmail.com
curl -i -X PUT 'localhost:8080/api/v1/user/preferences' \
  -H 'Authorization: Basic amFuZS5kb2VAZ21haWwuY29tOg==' \
  -H 'Content-Type: application/json' \
  --data '{"toppings":["bacon","pepperoni"]}'

Get preferences

# john.smith@gmail.com
curl -i 'localhost:8080/api/v1/user/preferences' \
  -H 'Authorization: Basic am9obi5zbWl0aEBnbWFpbC5jb206'

# jane.doe@gmail.com
curl -i 'localhost:8080/api/v1/user/preferences' \
  -H 'Authorization: Basic amFuZS5kb2VAZ21haWwuY29tOg=='

Get popular toppings

curl -i 'localhost:8080/api/v1/toppings/popular'

Additional features

App data is persisted between runs in PostgreSQL
Basic authentication (for demonstration purposes)

Observability

Logs are written as JSON and ready for collection
Prometheus metrics are exposed at http://localhost:8080/metrics
OpenTelemetry traces are pushed directly to Jaeger, see http://localhost:16686

Missing features

Authorize endpoint access with OAuth 2
Include trace ID as a response header
Build the app and run tests with Docker Compose
Implement an end-to-end test suite

License

This project is licensed under the terms of the MIT license. See the LICENSE file for details.