🧠 Synote Backend

This is the backend server for Synote, a note and task management app. Built using Node.js, Express, MongoDB, and JWT authentication, it also integrates AI summarization using the Mistral 7B model via OpenRouter.

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📁 Project Structure

server/
└── source/
    ├── controllers/    # Route logic
    ├── db/             # DB connection setup
    ├── middlewares/    # Auth & error middlewares
    ├── models/         # Mongoose models
    ├── routes/         # Express routes
    ├── services/       # Token / AI / utility services
    ├── utils/          # Misc helpers
    ├── app.js
    ├── constants.js
    └── server.js

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✨ Features

• ✅ JWT-based authentication with secure cookies
• ✅ User registration, login, logout, refresh tokens
• ✅ Notes and Tasks CRUD APIs
• ✅ Subtasks system nested under tasks
• ✅ AI-powered note/task summarization using Mistral 7B
• ✅ Express middleware for route protection and error handling
• ✅ Clean modular code and service-oriented architecture

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📌 API Endpoints

All endpoints are prefixed with /api/v1/

👤 Auth (/users)

Method	Route	Description
POST	/register	Register new user
POST	/login	Login user
GET	/me	Get current user
PATCH	/me	Update user (avatar, etc.)
POST	/logout	Logout user
POST	/refresh-tokens	Refresh access token

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📝 Notes

Method	Route	Description
POST	/notes/	Create a new note
GET	/notes/	Fetch all notes
GET	/notes/:id	Get note by ID
PATCH	/notes/:id	Update note
DELETE	/notes/:id	Delete note

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✅ Tasks

Method	Route	Description
POST	/tasks/	Create new task
GET	/tasks/	Fetch all tasks
GET	/tasks/:id	Get task by ID
PATCH	/tasks/:id	Update task
DELETE	/tasks/:id	Delete task
GET	/tasks/tasks-with-subtasks/	Tasks with subtasks

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↻ Subtasks

Method	Route	Description
POST	/tasks/:id/subtask	Add subtask to task
GET	/tasks/:id/subtask	List all subtasks for task
PATCH	/tasks/:id/subtask/:subtaskId	Update a specific subtask
DELETE	/tasks/:id/subtask/:subtaskId	Delete a specific subtask

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🧠 AI-Powered Summarization

Method	Route	Description
GET	/ai/notes/:noteId/summarize	Summarize a note
GET	/ai/tasks/:id/summarize	Summarize a task

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🛠️ Setup & Running

Install & Run Backend

cd server
npm install
npm run dev

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🔐 ENV Configuration (server/.env)

PORT=8000
MONGODB_URI=your-mongo-db-uri
CORS_ORIGIN=your-cors-origin-url
ACCESS_TOKEN_SECRET=your-access-token-secret
ACCESS_TOKEN_EXPIRY=15m
REFRESH_TOKEN_SECRET=your-refresh-token-secret
REFRESH_TOKEN_EXPIRY=7d
OPEN_ROUTER_API_KEY=your-openrouter-api-key

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⚙️ Tech Stack

• Node.js, Express.js
• MongoDB (Mongoose ODM)
• JWT (access & refresh tokens)
• AI Summarization via OpenRouter API
• Middleware: auth, error handling, validation
• Tooling: dotenv, nodemon, Postman, ESLint, Prettier

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📝 License

MIT © 2025 Aryan Singh Thakur