📦 Stock-er

A multi-tenant inventory and billing management system designed to simplify inventory operations, billing, and barcode-driven workflows.

Stock-er provides a centralized system for managing inventory, users, billing, and product information across organizations. It combines organization-level data isolation, role-based access control, barcode workflows, and real-time data synchronization into a desktop application.

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✨ Features

📦 Inventory Management

• Create, update, and manage inventory items
• Maintain product information, pricing, quantities, and images
• Real-time synchronization of inventory data
• Support for multiple images per inventory item

👥 Multi-Tenant Access Control

• Organization-level data segregation
• Role-based access for Admin, Manager, and Staff
• Granular permissions for user management
• Organization invitations and account management

🏷️ Barcode Workflows

• Generate product barcodes
• Scan and retrieve products using barcode scanners
• Search using barcode strings
• Identify products from uploaded barcode images
• Support for multiple standard barcode formats

🧾 Billing

• Create and manage bills
• Apply flat or percentage-based discounts
• Generate and save billing documents as PDFs
• Retrieve inventory items directly during checkout

🔐 Authentication

• Secure password handling
• Organization administrator registration
• User invitations
• Password reset workflows
• Role-based authorization

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🏗️ System Overview

                     Stock-er
                        │
          ┌─────────────┴─────────────┐
          │                           │
     User Management             Inventory
          │                           │
    Authentication              Product Data
    Role-based Access           Barcode Data
          │                           │
          └─────────────┬─────────────┘
                        │
                  MongoDB Atlas
                        │
             ┌──────────┴──────────┐
             │                     │
         Billing              Inventory 
             │                     |
      PDF Generation          Synchronization

🔄 Barcode Workflow

Stock-er supports multiple ways to identify an inventory item:

Physical Barcode Scanner
          │
          ├──────────────┐
          │              │
   Barcode String    Barcode Image
          │              │
          └───────┬──────┘
                  ↓
          Barcode Processing
                  ↓
          Product Retrieval
                  ↓
          Inventory / Billing

The application supports barcode generation as well as barcode-based product lookup.

👤 User Roles

• Admin: Organization and user management, inventory, billing
• Manager: Inventory, billing, and permitted user management
• Staff: Inventory and billing operations

Access is scoped to the organization to prevent data from one organization being exposed to another.

🛠️ Technology

Application

• C#
• .NET / Windows Forms
• Guna UI

Database

• MongoDB
• MongoDB Atlas

Libraries & Tools

• BarcodeLib
• ZXing.Net
• BCrypt.Net
• iTextSharp
• Newtonsoft.Json
• SkiaSharp
• Microsoft.Extensions.Hosting