djama1git / stakewolle-test-assignment

Referral system (FastAPI)

Stakewolle Test Assignment

Referral system

Installation and Setup

1. Install Docker and Docker Compose if they are not already installed on your system.

2. Clone the project repository:

git clone https://github.com/Djama1GIT/stakewolle-test-assignment.git
cd stakewolle-test-assignment

3. Start the project:

docker-compose up --build

User Interface

After starting the project, you can access the Swagger user interface at: http://localhost:8080/docs.
In Swagger, you can view the available endpoints and their parameters, and also make requests to the API.

Usage Examples

1. Login:

curl -i -X POST -d \
  "grant_type=password&[email protected]&password=string&scope=&client_id=&client_secret=" \
  http://localhost:8080/auth/login

HTTP/1.1 204 No Content
date: Tue, 13 Feb 2024 23:20:09 GMT
server: uvicorn
set-cookie: fastapiusersauth=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxIiwiYXVkIjpbImZhc3RhcGktdXNlcnM6YXV0aCJdLCJleHAiOjE3MDc4NzAwMDl9.tt5DLy0MJOJWjgK4zsAfGIOkNlGQ3OjVuqyRkXltShQ; HttpOnly; Max-Age=3600; Path=/; SameSite=lax; Secure

2. Logout:

curl -i -X POST -H "Cookie: fastapiusersauth=your_jwt_token" \
http://localhost:8080/auth/logout

HTTP/1.1 204 No Content
date: Tue, 13 Feb 2024 23:21:42 GMT
server: uvicorn
set-cookie: fastapiusersauth=""; HttpOnly; Max-Age=0; Path=/; SameSite=lax; Secure

3. User registration:

curl -i -X POST -H "Content-Type: application/json" -d \
  '{
    "email": "[email protected]",
    "password": "string",
    "is_active": true,
    "is_superuser": false, 
    "is_verified": false
  }' http://localhost:8080/auth/register/\?referral_code=GADJIIAVOV

HTTP/1.1 200 OK
date: Tue, 13 Feb 2024 23:14:09 GMT
server: uvicorn
content-length: 199
content-type: application/json

{
  "id": 1,
  "email": "[email protected]",
  "is_active": true,
  "is_superuser": false,
  "is_verified": false,
  "referral_code": null,
  "referral_expiration": null,
  "referrer_id": null,
  "referrals": null,
  "referrer": null
}

4. Getting information about referrals by their ID:

curl -X GET http://localhost:8080/referrals/by_id/1

{
  "referrer": 1,
  "referrals": [
    115,
    116,
    117
  ]
}

5. Getting the referrer code by email:

curl -X GET http://localhost:8080/referrals/code_by_email/[email protected]

{
  "code": "GADJIIAVOV"
}

6. Creating a referrer code:

curl -X POST -H "Content-Type: application/json" \
  -H "Cookie: fastapiusersauth=your_jwt_token" \
  -d '{"code": "GADJIIAVOV", "expiration": "2024-02-24T12:00:00.000Z"}' \
  http://localhost:8080/referrals/create_code

{
  "code": "GADJIIAVOV",
  "expiration": "2024-02-24T12:00:00.000Z"
}

7. Deleting a referrer code:

curl -i -X DELETE -H "Cookie: fastapiusersauth=your_jwt_token" \
  http://localhost:8080/referrals/delete_code

HTTP/1.1 200 OK
date: Tue, 13 Feb 2024 23:37:48 GMT
server: uvicorn
content-length: 0

Validation Error

HTTP/1.1 422 Unprocessable Entity
date: Tue, 13 Feb 2024 23:49:59 GMT
server: uvicorn
content-length: 205
content-type: application/json

{
  "detail": "Registration at this email address is not available"
}

{
  "detail": [
    {
      "type": "string_too_short",
      "loc": [
        "path",
        "code"
      ],
      "msg": "String should have at least 4 characters",
      "input": "G",
      "ctx": {
        "min_length": 4
      },
      "url": "https://errors.pydantic.dev/2.6/v/string_too_short"
    }
  ]
}

Internal Server Error

HTTP/1.1 500 Internal Server Error
date: Tue, 13 Feb 2024 23:48:58 GMT
server: uvicorn
content-length: 34
content-type: application/json

{
  "detail": "Internal Server Error"
}

Technologies Used

• Python - The programming language used for the project.
• REST - The architectural style for building distributed systems, used in the project to create the API.
• FastAPI - The Python framework used in the project to implement the REST API.
• Redis - An in-memory database used in the project for data caching and storing Celery tasks.
• PostgreSQL - A relational database used in the project for data storage.
• SQLAlchemy - An Object-Relational Mapping (ORM) used in the project for working with the database.
• Alembic - A database migration library used in the project to update the database structure when data models change.
• Docker - A platform used in the project for creating, deploying, and managing containers, allowing the application to run in an isolated environment.

Terms of Reference

A simple RESTful API service for a referral system needs to be developed.

Functional requirements:

• User registration and authentication (JWT, OAuth 2.0) ✅
• Authenticated users should be able to create or delete their referral code. Only 1 code can be active at a time ✅
• When creating a code, its expiration date must be set ✅
• Ability to retrieve a referral code by the referrer's email address ✅
• Ability to register as a referral using a referral code ✅
• Retrieve information about referrals based on the referrer's ID ✅
• UI documentation (Swagger, ReDoc) ✅

Optional tasks:

• Use clearbit.com/platform/enrichment to obtain additional user information during registration;❌
• Use emailhunter.co to verify the specified email address ✅
• Cache referral codes using in-memory database ✅
• Readme.md file with project description and instructions for deployment and testing ✅

Stack:

• Use any modern web framework ✅
• Use a relational database and migrations (Sqlite, PostgreSQL, MySQL) ✅
• Host the project on GitHub ✅

Project requirements:

• Code cleanliness and readability;
• All I/O bound operations should be asynchronous;
• The project should be well-structured;
• The project should be easy to deploy, handle non-standard situations, be resilient to incorrect user actions, etc.