coding-platform

About this project

coding-platform is an immersive, assessment-first coding environment built for learning, interviews, and secure timed evaluations. It blends a friendly editor experience with strict integrity controls so instructors and contest hosts can focus on evaluating skill — not chasing down accidental shortcuts.

Key ideas:

• Immersive assessments: during exam or contest mode the UI is intentionally locked down — copying and pasting is restricted, right-click/context menus and developer tools are disabled, and focus is maintained to discourage tab-switching and external lookups.
• Fairness by design: the platform records audit logs and enforces resource limits and per-job isolation so every submission runs in the same, reproducible environment.
• Fast feedback: testcases run inside lightweight language sandboxes and return rich structured results . so learners see useful, actionable feedback immediately.
• Multi-language and function-first: supports Python, Java, Node.js, C and C++ and includes helpers to accept function-only submissions and wrap them safely for execution.

This project aims to be practical for instructors and delightful for learners — combining robust sandboxing with a clean, distraction-minimizing UX.

Quick start (local development)

1. Build judge images (from project root):

docker build -t coding-judge-python judge/images/python
docker build -t coding-judge-java   judge/images/java
docker build -t coding-judge-node   judge/images/node
docker build -t coding-judge-c      judge/images/c
docker build -t coding-judge-cpp    judge/images/cpp

2. Start the backend (from project root):

node server.js

3. Start the frontend (in a separate shell):

cd coding-platform
npm install
npm start

Developer notes

• Frontend now calls the Docker-backed /execute endpoint and shows compileError, stderr, and non-zero exit statuses prominently.
• REACT_APP_API_BASE_URL is used for configuring the API base URL in different environments.

Tech stack

• Backend: Node.js (Express)
• Frontend: React (Vite) and CodeMirror for the editor
• Sandboxing: Docker judge images (GCC for C/C++, Temurin JDK for Java, Python 3, Node.js)