https://github.com/sounishnath003/practice-leetcode-multiplayer
a multiplayer application to practice leetcode problems easily with peers
https://github.com/sounishnath003/practice-leetcode-multiplayer
golang htmx leetcode websocket
Last synced: 2 months ago
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a multiplayer application to practice leetcode problems easily with peers
- Host: GitHub
- URL: https://github.com/sounishnath003/practice-leetcode-multiplayer
- Owner: sounishnath003
- Created: 2025-03-29T06:34:41.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2026-02-19T15:54:27.000Z (4 months ago)
- Last Synced: 2026-02-19T16:47:57.937Z (4 months ago)
- Topics: golang, htmx, leetcode, websocket
- Language: JavaScript
- Homepage: https://practice-leetcode-multiplayer-797087556919.asia-south1.run.app/
- Size: 932 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Practice Leetcode Multiplayer
> NOTE: Project is just a thought. Do not expect to be maintain nicely. Not sure, about future plans.
This project is a multiplayer platform for practicing Leetcode problems. It allows users to collaborate and compete in solving coding challenges in real-time with integrated audio calling and cloud code execution.
## YouTube Demo
[Practice Leetcode Multiplayer | Collaborate and practice together | Go + HTMX
](https://www.youtube.com/watch?v=3QiOIUQptu8)
## Deployed Service URL:
[practice-leetcode-multiplayer-797087556919.asia-south1.run.app](https://practice-leetcode-multiplayer-797087556919.asia-south1.run.app)
## Latest Features
- **Collaborative Code Editor**: Real-time synchronized editor with syntax highlighting for Python, Java, JavaScript, and C++.
- **Remote Code Execution**: Execute code directly in the cloud using a dedicated **Serverless Execution Engine** (hosted on Google Cloud Run) with support for Python, Java, JavaScript, and C++.
- **Smart Search with Suggestions**: Find any LeetCode problem by name with a real-time suggestions dropdown showing the top 5 matches.
- **Integrated Audio Calls**: Seamless pair programming experience with built-in **WebRTC audio calling**.
- **Automatic Boilerplate**: Selecting a problem or changing languages automatically fetches the correct function stubs and starter code from LeetCode.
- **Full State Sync**: All participants stay in sync with the same code, programming language, and problem details via WebSockets.
## Architecture
- **Backend**: Go (Golang) with standard library `net/http` and `gorilla/websocket`.
- **Frontend**: HTML + Tailwind CSS + HTMX for dynamic interactions.
- **Code Execution**: Python-based Flask app running in a Docker container on Google Cloud Run, strictly isolated with execution timeouts.
- **Real-time**: WebSockets for state synchronization and WebRTC for peer-to-peer audio communication.
## UI Screens:
### Create room or Join room:
### Multiplayer Screen (with Audio & Code Execution):
## Getting Started
1. Clone the repository:
```bash
git clone https://github.com/sounishnath003/practice-leetcode-multiplayer.git
```
2. Install dependencies:
```bash
make install
```
3. Set up the Code Execution Engine URL (optional, defaults to production):
```bash
export CODE_EXECUTION_ENGINE_URL="https://your-engine-url.run.app"
```
4. Start the application:
```bash
make run
```
## Environment Variables
| Variable | Description | Default |
|----------|-------------|---------|
| `PORT` | Port for the Go server | `3000` |
| `CODE_EXECUTION_ENGINE_URL` | URL of the deployed Cloud Run engine | `https://your-engine-url.run.app` |
| `GOOGLE_APPLICATION_CREDENTIALS` | Path to GCP service account JSON (for authenticated calls) | N/A |
## Contributing
Contributions are welcome! Feel free to open issues or submit pull requests.