Gadget Galaxy Inventory Management System

A comprehensive Java-based Inventory and Sales Management System built with a Swing Graphical User Interface (GUI). This application provides a robust platform for managing gadgets (Laptops, Smartphones, Tablets, Accessories), tracking inventory levels, processing sales, and handling different user roles (Managers and Sales Representatives).

🚀 Features & Use Cases

1. User Authentication & Role-Based Access

• Secure Login System: Users must authenticate using their credentials.
• Role-based Views: The system dynamically adjusts its interface based on whether the logged-in user is a Manager or a Sales Representative.
  • Manager: Has full access to product management, inventory tracking, sales history, and potentially user administration.
  • Sales Representative: Has restricted access intended primarily for processing sales and viewing available products.

2. Product & Inventory Management

• Add New Products: Managers can add new devices to the inventory by specifying details like ID, name, brand, capacity, price, and initial stock quantity.
• Categorized Gadgets: Supports handling different types of electronics:
  • 💻 Laptops
  • 📱 Smartphones
  • 📱 Tablets
  • 🎧 Accessories
• View Inventory: All users can view a comprehensive list of all current products in the system along with their current stock levels.
• Update & Delete Products: Managers can modify existing product details or entirely remove discontinued products from the system.
• Stock Tracking: Stock quantities are dynamically managed and updated upon new entries and successful sales.

3. Sales Processing

• Process Sales: Sales representatives and Managers can execute customer sales.
• Automated Stock Deduction: Processing a sale automatically validates if sufficient stock exists, calculates the total price, and reduces the available product stock in the inventory.
• Out of Stock Prevention: The system prevents the completion of sales for items that lack sufficient stock quantities.

4. Sales History & Reporting

• Track Transactions: Every processed sale is permanently recorded.
• View Sales Records: Managers can view the entire sales history containing details of the product sold, quantity, total transaction amount, and the user who processed the sale.

5. Data Persistence

• CSV File Storage: All system data is persistently saved to local CSV files.
  • products.csv: Stores all product catalog and stock information.
  • sales.csv: Maintains an enduring record of all processed transactions.
  • users.csv: Stores user credentials and role definitions.
• Automatic Load/Save: Data is automatically parsed when the application boots up and saved seamlessly without requiring a database connection.

🛠️ Technology Stack

• Language: Java
• UI Framework: Java Swing (GUI)
• Architecture: Object-Oriented Programming (OOP) including Encapsulation, Inheritance, and Polymorphism.
• Data Storage: Flat-file database using CSV arrays (File I/O).

💻 How to Run the Application

1. Prerequisites: Ensure you have the Java Development Kit (JDK 8 or higher) installed on your system.
2. Clone the Repository:

   git clone https://github.com/kavishkat2002/Gadget-Galaxy-Inventory-Management-System.git

3. Compile and Run: Open the application in an IDE that supports building Java projects (like Apache NetBeans, IntelliJ IDEA, or Eclipse), or compile it via terminal:

   # Navigate to the source directory
   cd Gadget-Galaxy-Inventory-Management-System/src
   # Compile all java files
   javac ./Main.java (or relevant main entry class)
   # Run the application
   java Main

4. Login: Use the predefined credentials from users.csv to enter the system as either a Manager or a Sales Representative.

📂 Project Structure

├── src/
│   ├── gui/          # Swing UI Components (LoginFrame, MainFrame, Panels)
│   ├── product/      # Product Object Models (Laptop, Smartphone, Tablet, Accessory)
│   ├── sales/        # Sales logic and records
│   ├── user/         # User roles and management (Manager, SalesRep)
│   ├── inventory/    # Main inventory tracking controller
│   └── file/         # FileManager for handling CSV reading/writing
├── products.csv      # Persistent product data
├── sales.csv         # Persistent sales records
└── users.csv         # Persistent user accounts