CodeJudge - Online Judge Platform

A powerful, sleek, and real-time Online Judge platform built with Node.js, Socket.IO, and Prisma. This platform allows users to participate in programming contests, submit code, and allows administrators to manage problems and monitor participants via live camera feeds.

🚀 Features

For Contestants

• Real-time Submissions: Submit code and see results (AC, WA, TLE, etc.) instantly.
• Contest Participation: Join scheduled contests with password protection.
• Live Scoreboard: Track your ranking and progress in real-time.
• Problem Filtering: Search and filter problems by title or difficulty.
• Profile & Rating: View your performance and current rating.

For Administrators

• Problem Management: Create, edit, and delete problems with custom time and memory limits.
• Testcase Management: Upload input/output pairs for automated grading.
• Contest Management: Schedule contests, assign problems, and set proctoring requirements.
• Live Camera Supervision: Monitor contestants' webcams in real-time to prevent cheating.
• Submission Oversight: View and manage all submissions across the platform.

Anti-Cheat System

• Camera Proctoring: Contests can be configured to require camera access.
• Admin Dashboard: Real-time grid view of all active contestants' camera feeds.
• Disconnection Alerts: Instant notification if a contestant's camera is disconnected.

🛠 Tech Stack

• Backend: Node.js, Express, TypeScript, Socket.IO.
• Database: SQLite (via Prisma ORM).
• Frontend: HTML5, Vanilla JavaScript, Tailwind CSS 4.
• Infrastructure: Docker (for isolated code execution).

📦 Installation & Setup

Prerequisites

• Node.js (v18 or higher)
• Docker (for judging code)
• npm or yarn

1. Clone the repository

git clone https://github.com/CoderIshibuki/judge-system
cd online-judge

2. Install dependencies

npm install

3. Setup Environment Variables

Create a .env file in the root directory:

JWT_SECRET=your_secret_key
DATABASE_URL="file:./dev.db"
PORT=3000

4. Setup Database

npx prisma migrate dev --name init
npx prisma db seed # Optional: seed initial data

5. Running the Application

Development Mode:

npm run dev

Production Mode:

npm run build
npm start

📸 Camera Permission Note

When accessing the platform via a local IP (e.g., http://192.168.1.5:3000), modern browsers may block camera access due to insecure context. To fix this:

1. Use HTTPS (recommended).
2. Or in Chrome, go to chrome://flags/#unsafely-treat-insecure-origin-as-secure, enable it, and add your IP.

📄 License

This project is licensed under the MIT License.