CodeDuel 🏁

A real-time competitive coding platform where developers race to solve AI-generated programming challenges. Built with Java Spring Boot, React, and OpenAI.

📸 Screenshots

Problem Walkthrough

Waiting Room

✨ Features

• AI-Powered Problems: Generates unique algo problems using OpenAI (GPT-4/3.5).
• Real-Time Multiplayer: Race against friends with live status updates via WebSockets.
• Code Execution: Secure, sandboxed code execution using Piston API.
• Languages: Python, Java, C++, JavaScript.
• Security: Google OAuth2, JWT authentication, OWASP sanitization.

🛠️ Tech Stack

Backend

• Java 17 & Spring Boot 3.2.0
• PostgreSQL (Data) & Flyway (Migrations)
• Spring WebSocket (STOMP)
• Spring Security (OAuth2, JWT)

Frontend

• React 18 & Vite
• Tailwind CSS
• Monaco Editor

🚀 Quick Start

Prerequisites

• Java 17, Node.js 18+, PostgreSQL

Setup

1. Clone: git clone https://github.com/yogyam/CodeDuel.git
2. Database: Create a Postgres DB named codeduel.

Configuration

Backend (backend/.env):

SPRING_DATASOURCE_URL=jdbc:postgresql://localhost:5432/codeduel
SPRING_DATASOURCE_USERNAME=postgres
SPRING_DATASOURCE_PASSWORD=password
OPENAI_API_KEY=sk-...
OPENAI_API_URL=https://api.openai.com/v1/chat/completions
JWT_SECRET=your_secret
SPRING_SECURITY_OAUTH2_CLIENT_REGISTRATION_GOOGLE_CLIENT_ID=...
SPRING_SECURITY_OAUTH2_CLIENT_REGISTRATION_GOOGLE_CLIENT_SECRET=...
CORS_ALLOWED_ORIGINS=http://localhost:5173

Frontend (frontend/.env):

VITE_BACKEND_URL=http://localhost:8080

Run

Backend:

cd backend && mvn spring-boot:run

Frontend:

cd frontend && npm install && npm run dev

📝 License

MIT License - see LICENSE.