AI POWERED DOCUMENT GENERATION

DocGen is a fully offline AI-powered documentation generator that transforms programming code into structured, professional documentation using a locally running Large Language Model (LLM).

The system integrates a modern React frontend, Django REST backend, and Ollama with the Qwen2.5-Coder model — eliminating dependency on external APIs like OpenAI or Gemini.

🧠 Why DocGen?

Most AI documentation tools rely on paid cloud APIs. DocGen runs completely offline using a local LLM.

✔ No API cost ✔ No internet dependency ✔ Secure local execution ✔ Full-stack architecture ✔ Production-ready implementation

✨ Features

✅ Paste code and generate documentation instantly

✅ Upload .py, .cpp, .java, .js files

✅ AI-generated structured Markdown documentation

✅ Export documentation as PDF

✅ Export documentation as DOCX

✅ JWT-based authentication

✅ Document history tracking

✅ Clean split-screen UI

✅ Dark mode with animated background

✅ Fully Offline (No OpenAI / Gemini required)

🏗 System Architecture

User
↓
React Frontend (UI + API Calls)
↓
Django REST API
↓
Ollama Local Model (Qwen2.5-Coder:7B)
↓
Documentation Generator Engine
↓
Generated Output
├── Markdown Docs
├── PDF Export
└── DOCX Export
↓
Download to User

---

🏗️ Tech Stack

Layer	Technology
Frontend	React, Tailwind CSS, Framer Motion
Backend	Django, Django REST Framework
Authentication	SimpleJWT (JWT-based Auth)
AI Model	Ollama + Qwen2.5-Coder:7B
PDF Engine	ReportLab (Platypus)
DOCX Export	python-docx

---

📂 Project Structure

DocGen/
│
├── backend/
│   ├── backend/
│   │   ├── __init__.py
│   │   ├── settings.py
│   │   ├── urls.py
│   │   ├── asgi.py
│   │   └── wsgi.py
│   │
│   ├── generator/
│   │   ├── migrations/
│   │   ├── admin.py
│   │   ├── apps.py
│   │   ├── models.py
│   │   ├── serializers.py
│   │   ├── views.py
│   │   ├── urls.py
│   │   └── utils.py
│   │
│   ├── manage.py
│   └── requirements.txt
│
├── frontend/
│   ├── public/
│   │   ├── index.html
│   │   ├── favicon.ico
│   │   └── manifest.json
│   │
│   ├── src/
│   │   ├── components/
│   │   │   ├── Login.jsx
│   │   │   ├── Dashboard.jsx
│   │   │   ├── Editor.jsx
│   │   │   └── History.jsx
│   │   │
│   │   ├── services/
│   │   │   └── api.js
│   │   │
│   │   ├── App.js
│   │   ├── index.js
│   │   └── App.css
│   │
│   ├── package.json
│   ├── tailwind.config.js
│   └── postcss.config.js
│
├── .gitignore
└── README.md

⚙️ Installation & Setup Guide

🔹 Prerequisites

Python 3.10+

Node.js + npm

Ollama installed locally

1️⃣ Clone Repository

git clone https://github.com/SanjayMarathi/DocGen.git
cd DocGen

2️⃣ Setup Ollama (Local LLM)

Pull the model and start Ollama:

ollama pull qwen2.5-coder:7b
ollama serve


Ollama runs at:

http://localhost:11434

3️⃣ Backend Setup (Django)

cd backend
python -m venv venv

▶ Activate Virtual Environment

Windows (PowerShell)

.\venv\Scripts\activate


Mac/Linux (Bash)

source venv/bin/activate

▶ Install Dependencies

pip install -r requirements.txt


If requirements.txt is not available:

pip install django djangorestframework djangorestframework-simplejwt django-cors-headers requests reportlab python-docx wikipedia

▶ Apply Migrations

python manage.py migrate

▶ Run Backend Server

python manage.py runserver 8000

Backend URL:

http://127.0.0.1:8000

4️⃣ Frontend Setup (React)

cd frontend
npm install
npm start

Frontend URL:

http://localhost:3000

🔌 API Endpoints

Method	Endpoint	Description
POST	/api/generate/	Generate streaming documentation
POST	/api/pdf/	Export generated documentation as PDF
POST	/api/docx/	Export generated documentation as DOCX

🔐 Authentication

JWT-based authentication (SimpleJWT)

Token-based API communication

Document history linked to user account

📄 PDF & DOCX Generation

PDF export uses ReportLab Platypus Engine
DOCX export uses python-docx

Provides:

Structured headings

Code block formatting

Professional layout

Instant download

🧪 Quick Test

Start Ollama

Start Backend

Start Frontend

Paste or upload code

Click Generate Documentation

Click Export PDF / DOCX

⚠️ Troubleshooting

Model not responding

ollama list


If model missing:

ollama pull qwen2.5-coder:7b

## CORS Issues

Already enabled in settings.py:

CORS_ALLOW_ALL_ORIGINS = True

## Port Conflict

Update ports in:

frontend/src/App.js

backend/generator/views.py

🚀 Future Improvements

Markdown live preview panel

Multi-language documentation templates

Docker containerization

Role-based access control

Cloud deployment version.