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https://github.com/krishnendu-1/nexusmedia_backend

NexusMedia Backend is a Node.js, Express, and MongoDB-powered backend for media applications. It supports user management, content uploads, and subscriptions with features like JWT-based authentication, Cloudinary storage, and MongoDB aggregations for efficient data retrieval. Ideal for developers needing secure, scalable backend infrastructure.
https://github.com/krishnendu-1/nexusmedia_backend

aggregation-pipleline expressjs jwt-authentication mongodb mongoose nodejs postman

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NexusMedia Backend is a Node.js, Express, and MongoDB-powered backend for media applications. It supports user management, content uploads, and subscriptions with features like JWT-based authentication, Cloudinary storage, and MongoDB aggregations for efficient data retrieval. Ideal for developers needing secure, scalable backend infrastructure.

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README 

        
## 🚀 NexusMedia - Integrated Content Management Backend



![image](https://github.com/user-attachments/assets/03cbd841-1bdc-44c2-81fa-794551c1b8ad)



## Overview



NexusMedia is a robust cutting-edge **Backend** project designed with Node.js, Express, and MongoDB to provide developers and content platforms with a powerful, flexible, and secure infrastructure for building sophisticated digital experiences. It provides a RESTful API for user management, including registration, login, and profile management, along with features such as JWT-based authentication, image uploads to Cloudinary, and user subscriptions.



Tagline: *Bridging Digital Experiences*



## Table of Contents



- [Features](#features)

- [Technologies Used](#technologies-used)

- [Installation](#installation)

- [Usage](#usage)

- [Detailed Code Architecture and Advanced Implementations](#detailed-code-architecture-and-advanced-implementations)

- [Key Advanced Architectural Patterns](#key-advanced-architectural-patterns)

- [API Endpoints](#api-endpoints)

- [Contributing](#contributing)

- [License](#license)



## Features



- User registration and login

- JWT authentication for secure access

- Profile management including avatar and cover photo updates

- Subscription management between users

- Watch history tracking

- Image uploads to Cloudinary

- Error handling with custom error responses



## Technologies Used



- Node.js

- Express.js

- MongoDB (with Mongoose)

- cloudinary (for image,video storage)

- bcrypt

- cookie-parser

- cors

- jsonwebtoken (for authentication)

- multer (for file uploads)

- mongoose (Object Data Model)

- mongoose-aggregate-paginate-v2 (to implement mongodb aggregation, sub-aggregation pipelines)

- dotenv (for environment variable management)

- Postman (for testing all the API endpoints without frontend)\

- nodemon 

- prettier



## Installation



1. Clone the repository:

   ```bash

   git clone https://github.com/Krishnendu-1/NexusMedia_Backend.git

   cd NexusMedia_Backend

2. Install the dependencies:

   ```bash

   npm install

3. Create a .env file in the root directory and configure the following environment variables:

   ```bash

   MONGODB_URL=your_mongodb_connection_string

   CLOUDNARY_NAME=your_cloudinary_name

   CLOUDNARY_API_KEY=your_cloudinary_api_key

   CLOUDNARY_API_SECRET=your_cloudinary_api_secret

   SECRET_REFRESH_TOKEN=your_secret_key

   PORT=3000



## Usage



  1. To start the server, run:

     ```bash

     npm run dev

The server will be running on http://localhost:3000 (or the port specified in your .env file).



## Detailed Code Architecture and Advanced Implementations



1. User Model (`user.model.js`):



 **Advanced Concepts:**

- Mongoose pre-save middleware for automatic password hashing

- Custom method generation for token creation

- Secure password handling

- Dynamic token generation with environment variable



2. Authentication Middleware (`auth.middleware.js`):



**Advanced Concepts:** 

- Multiple token extraction methods

- Secure token verification

- Middleware-based authentication

- Selective data retrieval



3. Cloudinary Upload Utility (`Cloudnary.js`):



**Advanced Concepts:** 

- Automatic resource type detection

- Fail-safe error handling

- Automatic file system cleanup



4. Subscription Details Aggregation (`Register.controller.js`):



**Advanced Concepts:** 

- Complex MongoDB Aggregation Pipeline

- Dynamic field generation

- Conditional logic in aggregation

- Selective data projection



5. Async Handler Utility (`asyncHandler.js`):



**Advanced Concepts:** 

- Higher-order function

- Promise resolution

- Centralized error handling



6. Multer Middleware (`multer.middleware.js`):



**Advanced Concepts:** 

- Dynamic file storage configuration

- Flexible file naming strategy



## Key Advanced Architectural Patterns:



**Middleware-Driven Architecture**

- Authentication middleware

- Error handling middleware

- File upload middleware



**Aggregation-Based Data Retrieval**

- Complex MongoDB aggregation pipelines

- Dynamic data transformation

- Efficient querying strategies



**Secure Token Management**

- JWT-based authentication

- Refresh token mechanism

- Secure token generation and verification



**Modular Design**

- Separation of concerns

- Utility-based approach

- Reusable components



**Performance Optimization Techniques**

- Mongoose Indexing

- Selective Data Projection

- Efficient Aggregation Pipelines

- Caching Strategies

- Minimal Data Transfer



**Security Implementations**

- Password Hashing

- JWT Token Verification

- Environment-Based Configuration

- Secure Cookie Management

- Input Validation



## API Endpoints



**The following are the main API endpoints available:**



**User Registration**

- POST `/api/users/register`

  - Registers a new user with avatar and cover photo uploads.

  

**User Login**

- POST `/api/users/login`

  - Authenticates a user and returns access and refresh tokens.

    

**User Logout**

- POST `/api/users/logout`

  - Logs out the user and invalidates the refresh token.

    

**Refresh Access Token**

- POST `/api/users/refreshAccessToken`

  - Refreshes the access token using the refresh token.

    

**Update Password**

- POST `/api/users/passwordUpdate`

  - Updates the user's password (authenticated users only).

    

**Get Current User**

- GET `/api/users/cuurentUser`

  - Retrieves the current user's profile (authenticated users only).

    

**Update User Details**

- PATCH `/api/users/detailsUpdate`

  - Updates user details like fullname and email (authenticated users only).

    

**Update Avatar**

- PATCH `/api/users/avatarUpdate`

  - Updates the user's avatar (authenticated users only).

    

**Update Cover Photo**

- PATCH `/api/users/coverphotoUpdate`

  - Updates the user's cover photo (authenticated users only).

    

**Get User Subscription Details**

- GET `/api/users/c/:username`

  - Retrieves subscription details for a given user.

    

**Get User Watch History**

- GET `/api/users/history`

  - Retrieves the watch history for the authenticated user.

    

## Contributing



Contributions are welcome! Please feel free to submit a pull request or open an issue to discuss changes.



## License



This project is licensed under the MIT License - see the LICENSE file for details.