| # YSNRFD Messenger | |
| A modern, real-time messaging application built with the MERN stack (MongoDB, Express.js, React, Node.js) and Socket.IO. | |
| ## 🚀 Features | |
| ### Core Messaging | |
| - Real-time one-on-one and group messaging | |
| - Read receipts and typing indicators | |
| - Message status (sending, sent, delivered, read) | |
| - Message editing and deletion | |
| - Emoji reactions | |
| ### File Sharing | |
| - Image files with preview and download | |
| - Audio files with built-in player | |
| - Document files (PDF, TXT) with download | |
| - File size validation and type checking | |
| - Drag & drop file upload | |
| ### User Experience | |
| - Dark/Light theme support | |
| - Responsive design for all devices | |
| - Progressive Web App (PWA) support | |
| - Auto-login with token persistence | |
| - Online/offline status | |
| - User search and contact management | |
| ### Advanced Features | |
| - Group chats with admin roles | |
| - Invite links for group joining | |
| - Message search and filtering | |
| - File caching for offline access | |
| - Real-time notifications | |
| - Cross-device synchronization | |
| ## 🛠️ Tech Stack | |
| ### Frontend | |
| - **React 18** with TypeScript | |
| - **Tailwind CSS** for styling | |
| - **Socket.IO Client** for real-time communication | |
| - **Vite** for build tooling | |
| - **Lucide React** for icons | |
| ### Backend | |
| - **Node.js** with Express.js | |
| - **Socket.IO** for WebSocket communication | |
| - **MongoDB** with Mongoose ODM | |
| - **JWT** for authentication | |
| - **Multer** for file uploads | |
| ## 📦 Installation | |
| ### Prerequisites | |
| - Node.js 16+ | |
| - MongoDB 4.4+ | |
| - npm or yarn | |
| ### Backend Setup | |
| ```bash | |
| cd backend | |
| npm install | |
| cp .env.example .env | |
| # Configure your environment variables | |
| npm run dev | |
| ``` |