📱 Social Media App - Backend (Node.js & Express)

This is the backend service for a Social Media Application that allows users to register, connect, share media content, and chat in real-time. The application offers a mix of RESTful and GraphQL APIs, supports media uploads, and implements strong authentication and real-time communication.

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🛠️ Technologies Used

• Node.js
• Express.js
• MongoDB + Mongoose
• GraphQL
• Socket.io
• Cloudinary + Multer (Media Uploads)
• Bcrypt & Crypto (Password Security)
• Nodemailer (Email Support)
• JWT (Authentication)
• Google OAuth (Social Login)
• Pagination
• Helmet, CORS, Rate Limiter (Security Enhancements)

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🌟 Features

👤 Users

• Register and login using email/password or Google account
• View and edit profile information
• Upload profile pictures and other media
• Follow/unfollow users
• Explore posts from followed users

📝 Posts & Media

• Create, update, and delete posts
• Upload media (images/videos) using Multer and store them in Cloudinary
• Like, comment, and engage with posts

💬 Messaging

• Real-time 1-on-1 messaging via Socket.io
• Includes typing indicators and instant message delivery
• Conversation history and notifications support

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🔐 Security & Authentication

• Passwords are hashed using Bcrypt
• Authentication via JWT tokens
• Optional login via Google OAuth
• API protected using Helmet, CORS, and Rate Limiter

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📤 File & Media Uploads

• Handled with Multer
• Stored and served securely using Cloudinary

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🚀 API Access

• Clean and modular RESTful API
• Optional GraphQL API for flexible and efficient data queries
• Pagination implemented on feeds, users, and comments

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📬 Realtime Chat

• Built using Socket.io
• Real-time private messaging with instant delivery
• Includes typing indicators and message notifications

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🧪 Setup & Run

# 1. Clone the repository
git clone https://github.com/your-username/social-media-backend.git

# 2. Install dependencies
cd social-media-backend
npm install

# 3. Create a .env file based on .env.example
# Server
PORT=3000

# Database
DB_URI=mongodb://localhost:27017/socialApp

# Security
SECRET_KEY=BAL7
SALT=8

# JWT Tokens
USER_ACCESS_TOKEN=your_user_access_token
USER_REFRESH_TOKEN=your_user_refresh_token
ADMIN_ACCESS_TOKEN=your_admin_access_token
ADMIN_REFRESH_TOKEN=your_admin_refresh_token

# Google OAuth
CLIENT_ID=your_google_client_id

# Cloudinary
CLOUD_NAME=your_cloudinary_name
API_KEY=your_cloudinary_api_key
API_SECRET=your_cloudinary_api_secret

#email's sender
EMAIL = your_email
PASSWORD= your_password

# AI (Optional)
GEMINI_AI_KEY=your_gemini_api_key



# 4. Start the development server
npm run dev