Engelbyte's Waterbyte Clean Architecture

A software architecture style example for APIs that utilizes the features of SOLID-Principle.
The example shows the API for Third-Party-Authentication with Google Account or Apple ID, storing and retrieving user data from a postgres database.

Peripherals

Package DB

Contains Database-specific code like creating the connection, executing queries and all other code that is specific to the DBMS chosen.

Package Api

Contains code that queries external APIs for data.

Core

Business Logic (package Logic)

Contains Testable Business Logic. The methods provided usually have function parameters (Dependency Injection).

Package Models

Contains entities used in Business Logic.

Framework-Specific Code

Package Routes

Contains framework-specific code (HTTP in the example). Each route is represented by a factory-function which takes in outer dependencies (function parameters) and returns a http request handler.
Three responsibilities:

1. Parse framework-specific input into Business-Logic Models (Entities)
2. Use the entities created in Step 1 to call business methods
3. Present the results of calling the business methods in a framework-specific style.

Main Package (server.go)

The main function that creates an HTTP-Server, registers all routes utilizing the factory-functions of the Route package.

Dependency Diagram