Code OS – Invoice Management System

A web-based invoice management system built with Flask for businesses, enabling seamless creation, tracking, and management of invoices.

---

📋 Table of Contents

• About the Project
• Features
• Tech Stack
• Getting Started
  • Prerequisites
  • Installation
• Usage
• Project Structure
• Screenshots
• Contributing
• License
• Contact

---

📌 About the Project

The Code OS Invoice Management System is a Flask-powered web application designed to help businesses manage their invoicing process efficiently. It allows users to [generate, download, view and search existing invoices, edit and delete invoices, track the payment status of invoices, categorize most frequent client groups to optimze sales, and save invoices in a database, all in one sysytem].

Managing

---

✨ Features

• Generate invoices
• View and search existing invoices
• Edit and delete invoices
• Track payment status (paid / unpaid / pending)
• Download invoice as pdf
• Categorize most frequent client groups [to note target sales clientss]
• Save invoices in a single database

---

🛠 Tech Stack

Technology	Purpose
Python	Backend logic
Flask	Web framework
HTML5	Page structure / Jinja2 templating
CSS3	Styling and layout
JavaScript	Frontend interactivity
SQLite3 / PostgreSQL / MongoDb]	Data storage

---

🚀 Getting Started

Prerequisites

• Python 3.x
• pip
• [virtualenv]

Installation

1. Clone the repository

   git clone https://github.com/your-username/code-os-invoice.git
   cd code-os-invoice

2. Create and activate a virtual environment

   python -m venv venv
   source venv/bin/activate        # On Windows: venv\Scripts\activate

3. Install dependencies

   pip install -r requirements.txt

4. Set up environment variables

   cp .env.example .env
   # Edit .env with your configuration (secret key, database URI, etc.)

5. Initialize the database

   flask db init
   flask db migrate
   flask db upgrade

6. Run the application

   flask run

7. Open your browser and navigate to http://127.0.0.1:5000

---

💻 Usage

1. Navigate to the Invoices section
2. Fill in client details, items, and amounts
3. Click New Invoice to create an invoice (once created, the invoice is saved in a database/ MongoDb / postgreSQL or SQLite3)
4. Download invoice as a pdf
5. [View all issued invoices in a database, by clicking a daatabase button]
6. View a chart that has the most frequent customer groups.

---

📁 Project Structure

code-os-invoice/
├── app/
│   ├── main.py
│   ├── static/
│   │   ├── css/
│   │   │   └── style.css
│   │   └── js/
│   │       └── main.js
│   └── templates/
│       ├── base.html
│       ├── dashboard.html
        |-- invoicedatabase.html
        |-- client.html
        |-- reports.html
        |-- settings.html
        |-- createinvoice.html
│           
│          
│      
├── migrations/
├── .env.example
├── config.py
├── requirements.txt
├── run.py
└── README.md

---

📸 Screenshots

Dashboard	Invoice View

---

🤝 Contributing

1. Fork the repository
2. Create a feature branch (git checkout -b feature/your-feature)
3. Commit your changes (git commit -m 'Add your feature')
4. Push to the branch (git push origin feature/your-feature)
5. Open a Pull Request

---

📄 License

Distributed under the MIT License. See LICENSE for more information.

---

📬 Contact

Code OS Development Team

• Email: [codeos285@gmail.com]
• GitHub: [https://github.com/sakibumumuni]
• Project Link: [https://github.com/sakibumumuni/code_os_invoice]