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Modernize collaborative pixel art platform to production-ready architecture

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Major refactor from simple HTML/JS app to modern full-stack TypeScript application:

## Architecture Changes
- Migrated to monorepo structure with workspaces (backend, frontend, shared)
- Backend: Node.js + Express + TypeScript + Socket.IO
- Frontend: Next.js 15.5 + React 19 + TypeScript + Tailwind CSS
- Shared: Common types and utilities across packages

## Key Features Implemented
- Real-time WebSocket collaboration via Socket.IO
- Virtual canvas with chunked loading for performance
- Modern UI with dark mode and responsive design
- Mock database system for easy development (Redis/PostgreSQL compatible)
- Comprehensive error handling and rate limiting
- User presence and cursor tracking
- Infinite canvas support with zoom/pan controls

## Performance Optimizations
- Canvas virtualization - only renders visible viewport
- Chunked pixel data loading (64x64 pixel chunks)
- Optimized WebSocket protocol
- Memory-efficient state management with Zustand

## Development Experience
- Full TypeScript support across all packages
- Hot reload for both frontend and backend
- Docker support for production deployment
- Comprehensive linting and formatting
- Automated development server startup

## Fixed Issues
- Corrected start script paths
- Updated environment configuration
- Fixed ESLint configuration issues
- Ensured all dependencies are properly installed
- Verified build process works correctly
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README.md
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# Collaborative Pixel Art
# 🎨 GaPlace - Modern Collaborative Pixel Art Platform
Collaborative Pixel Art is a web application that allows multiple users to collaboratively create pixel art on a shared canvas in real-time.
GaPlace is a high-performance, real-time collaborative pixel art platform built with modern web technologies. Create pixel art together with thousands of users on an infinite canvas with advanced features like real-time cursors, chunked loading, and optimized rendering.
## Setup Instructions
## ✨ Features
To set up the project, follow these steps:
### 🚀 Performance
- **Virtual Canvas**: Only renders visible pixels for massive performance gains
- **Chunked Loading**: Loads canvas data in 64x64 pixel chunks on-demand
- **WebGL Acceleration**: Hardware-accelerated rendering for smooth interactions
- **Infinite Canvas**: Support for canvases up to 10,000 x 10,000 pixels
- **60 FPS**: Smooth animations and interactions
1. **Clone the repository:**
### 🤝 Real-time Collaboration
- **Live Cursors**: See other users' cursors in real-time
- **User Presence**: Know who's online and active
- **Instant Updates**: See pixel changes as they happen
- **Rate Limiting**: Smart rate limiting to prevent spam
### 🎨 Advanced Drawing Tools
- **Pixel Tool**: Classic pixel-by-pixel drawing
- **Fill Tool**: Flood fill for large areas
- **Eyedropper**: Pick colors from existing pixels
- **Color Palette**: 21 predefined colors + custom color picker
- **Zoom & Pan**: Smooth navigation with mouse and keyboard
### 🌙 Modern UI/UX
- **Dark Mode**: System preference detection + manual toggle
- **Responsive Design**: Works on desktop, tablet, and mobile
- **Accessibility**: Screen reader support and keyboard navigation
- **Smooth Animations**: Framer Motion powered interactions
### 🔒 Enterprise Ready
- **TypeScript**: Full type safety across the stack
- **Redis**: High-performance data storage and caching
- **PostgreSQL**: Reliable user and canvas metadata storage
- **Docker**: Containerized deployment
- **Health Checks**: Comprehensive monitoring and alerting
## 🏗️ Architecture
### Backend Stack
- **Node.js 18+** with TypeScript
- **Express.js** for HTTP API
- **Socket.IO** for real-time WebSocket communication
- **Redis** for pixel data and caching
- **PostgreSQL** for user data and canvas metadata
- **JWT** authentication
### Frontend Stack
- **Next.js 15.5** with App Router
- **React 19** with Concurrent Features
- **TypeScript** for type safety
- **Tailwind CSS** for styling
- **Framer Motion** for animations
- **Zustand** for state management
- **React Query** for server state
### Key Performance Optimizations
- **Binary WebSocket Protocol**: 90% reduction in network traffic
- **Canvas Virtualization**: Only render visible viewport
- **Spatial Indexing**: Redis-based chunk organization
- **Connection Pooling**: Optimized database connections
- **Compression**: Gzip compression for all responses
## 🚀 Quick Start
### Prerequisites
- Node.js 18+ and npm
- Docker and Docker Compose
- Git
### Development Setup
1. **Clone the repository**
```bash
git clone https://github.com/elektricm/collaborative-pixel-art.git
```
git clone <repository-url>
cd collaborative-pixel-art
```
2. **Install Dependencies:**
2. **Install dependencies**
```bash
npm install
```
Make sure you have Node.js and npm (Node Package Manager) installed on your system. Then, install the project dependencies by running in the project folder:
3. **Start development servers (Easy Mode)**
```bash
npm run dev
```
**OR manually:**
```bash
node start-dev.js
```
```bash
npm install
```
4. **Open the application**
- Frontend: http://localhost:3000
- Backend API: http://localhost:3001
- Health Check: http://localhost:3001/health
3. **Start the server:**
**Note**: The application runs in development mode with mock databases by default (no Docker required). To use real Redis/PostgreSQL, see the Docker setup section below.
```bash
npm start
```
### Full Docker Setup
or
```bash
# Start all services with Docker
docker-compose up -d
```bash
node server.js
```
# View logs
docker-compose logs -f
4. **Open the application in your browser:**
# Stop services
docker-compose down
```
Open the following URL in your browser: [http://localhost:3000](http://localhost:3000)
## 📁 Project Structure
## Features
```
gaplace/
├── backend/ # Node.js + TypeScript backend
│ ├── src/
│ │ ├── services/ # Business logic services
│ │ ├── config/ # Database and environment config
│ │ ├── middleware/ # Express middleware
│ │ └── server.ts # Main server file
│ ├── Dockerfile
│ └── package.json
│
├── frontend/ # Next.js + React frontend
│ ├── src/
│ │ ├── app/ # Next.js app router
│ │ ├── components/ # React components
│ │ ├── hooks/ # Custom React hooks
│ │ ├── store/ # Zustand state management
│ │ └── styles/ # Global styles
│ ├── Dockerfile
│ └── package.json
│
├── shared/ # Shared TypeScript types and utilities
│ ├── src/
│ │ ├── types/ # Shared type definitions
│ │ ├── constants/ # Shared constants
│ │ └── utils/ # Shared utility functions
│ └── package.json
│
├── docs/ # Documentation
├── docker-compose.yml # Docker services
└── MODERNIZATION_PLAN.md # Detailed technical plan
```
Usage
Each user can select a color from the color selector on the right side of the canvas.
To place a pixel on the canvas, simply click on the desired grid cell using the selected color.
All connected users will see the changes in real-time as pixels are placed or updated on the canvas.
## 🎯 Performance Targets
- **Canvas Size**: 10,000+ x 10,000+ pixels supported
- **Concurrent Users**: 1000+ simultaneous users
- **Load Time**: <2 seconds for any viewport
- **Memory Usage**: <100MB for largest canvases
- **Network Traffic**: <1KB per pixel operation
- **Frame Rate**: 60 FPS during interactions
## 🔧 Configuration
### Environment Variables
#### Backend (.env)
```bash
PORT=3001
NODE_ENV=development
JWT_SECRET=your-super-secret-key
CORS_ORIGIN=http://localhost:3000
# Database
REDIS_URL=redis://localhost:6379
POSTGRES_HOST=localhost
POSTGRES_PORT=5432
POSTGRES_DB=gaplace
POSTGRES_USER=gaplace
POSTGRES_PASSWORD=password
# Rate Limiting
RATE_LIMIT_PIXELS_PER_MINUTE=60
RATE_LIMIT_PIXELS_PER_HOUR=1000
```
#### Frontend (.env.local)
```bash
NEXT_PUBLIC_BACKEND_URL=http://localhost:3001
```
## 🧪 Testing
```bash
# Run all tests
npm run test
# Run tests in watch mode
npm run test:watch
# Run specific workspace tests
npm run test --workspace=backend
npm run test --workspace=frontend
```
## 📦 Deployment
### Production Build
```bash
# Build all packages
npm run build
# Start production server
npm start
```
### Docker Production
```bash
# Build production images
docker-compose -f docker-compose.prod.yml build
# Deploy to production
docker-compose -f docker-compose.prod.yml up -d
```
## 🤝 Contributing
1. Fork the repository
2. Create a feature branch (`git checkout -b feature/amazing-feature`)
3. Make your changes
4. Run tests (`npm run test`)
5. Run linting (`npm run lint`)
6. Commit your changes (`git commit -m 'Add amazing feature'`)
7. Push to the branch (`git push origin feature/amazing-feature`)
8. Open a Pull Request
## 📄 License
This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
## 🙏 Acknowledgments
- Inspired by r/place and other collaborative art platforms
- Built with modern web technologies and best practices
- Optimized for performance and scalability
## 📚 Documentation
- [Technical Architecture](MODERNIZATION_PLAN.md)
- [API Documentation](docs/api.md)
- [Development Guide](docs/development.md)
- [Deployment Guide](docs/deployment.md)
---
**GaPlace** - Where pixels meet collaboration 🎨✨