ROLE_BASED_IMPLEMENTATION.md

Role-Based Access Control Implementation

Overview

The POS system has been updated with comprehensive role-based access control (RBAC) according to your requirements. Each user role now has specific responsibilities and access permissions.

User Roles & Responsibilities

1. Admin Role

Responsibilities: Monitoring, create menu, create table, check income, admin-level tasks

Features Implemented:

• Admin Dashboard - Comprehensive monitoring interface with:
  • Real-time stats (today's orders, revenue, active orders, occupied tables)
  • Income reporting with time-based filtering (today/week/month)
  • Detailed revenue breakdown with gross/tax/net income
  • Quick action cards for management tasks

API Endpoints:

• GET /admin/dashboard/stats - Dashboard statistics
• GET /admin/reports/income - Income reports
• GET /admin/reports/sales - Sales reports
• POST /admin/categories - Create categories
• PUT /admin/categories/:id - Update categories
• DELETE /admin/categories/:id - Delete categories
• POST /admin/products - Create products
• PUT /admin/products/:id - Update products
• DELETE /admin/products/:id - Delete products
• POST /admin/tables - Create tables
• PUT /admin/tables/:id - Update tables
• DELETE /admin/tables/:id - Delete tables
• GET /admin/users - List users
• POST /admin/users - Create users
• PUT /admin/users/:id - Update users
• DELETE /admin/users/:id - Delete users

2. Server Role

Responsibilities: Create orders for guests (dine-in ONLY)

Features Implemented:

• Server Interface - Specialized interface for dine-in orders:
  • Product catalog with category filtering
  • Table selection (only available tables)
  • Shopping cart with item management
  • Customer name entry (optional)
  • Order notes and special instructions
  • Restriction: Can only create dine-in orders

API Endpoints:

• POST /server/orders - Create dine-in orders only (automatically forces order_type to 'dine_in')

3. Counter/Checkout Role

Responsibilities: Process payments for dine-in customers + create orders (all types: dine-in, dine-out, take-away)

Features Implemented:

• Counter Interface - Dual-purpose interface:
  • Order Creation Tab:
    • Support for all order types (dine-in, takeout, delivery)
    • Product catalog with category filtering
    • Table selection (for dine-in orders)
    • Customer information entry
    • Shopping cart management
  • Payment Processing Tab:
    • View orders ready for payment
    • Multiple payment methods (cash, credit, debit, digital wallet)
    • Payment amount entry with reference numbers
    • Process payments for completed orders

API Endpoints:

• POST /counter/orders - Create orders (all types)
• POST /counter/orders/:id/payments - Process payments

4. Kitchen Role (Existing)

Responsibilities: Order preparation and status updates

Features:

• Kitchen Display System (already implemented)
• Order status management
• Preparation time tracking

Database Schema Updates

Updated User Roles

The database schema has been updated to support the new role structure:

-- Updated user roles constraint
role VARCHAR(20) NOT NULL CHECK (role IN ('admin', 'manager', 'server', 'counter', 'kitchen'))

Sample Users Added

• server1 / server2 - Server role users
• counter1 / counter2 - Counter/Checkout role users
• Existing admin, manager, kitchen users remain

Frontend Implementation

Role-Based Layout System

• RoleBasedLayout Component - Central routing component that:
  • Shows appropriate interface based on user role
  • Provides role-based navigation tabs
  • Displays user role badges and permissions
  • Handles role-specific access control

Interface Components

1. AdminDashboard - Full management interface for admins
2. ServerInterface - Dine-in order creation for servers
3. CounterInterface - Order creation and payment processing for counter staff
4. Existing components - POSLayout, KitchenLayout remain available

Navigation System

Users see different navigation options based on their role:

• Admin/Manager: All interfaces (Dashboard, POS, Server, Counter, Kitchen)
• Server: Server Interface + General POS
• Counter: Counter Interface + General POS
• Kitchen: Kitchen Display only

API Client Updates

New Methods Added

• createServerOrder() - Server-specific order creation
• createCounterOrder() - Counter-specific order creation
• processCounterPayment() - Counter payment processing
• getDashboardStats() - Admin dashboard data
• getIncomeReport() - Admin income reporting
• Plus full CRUD operations for categories, products, tables, and users

Security Implementation

Role-Based Route Protection

• Backend middleware enforces role restrictions
• JWT tokens include role information
• API endpoints validate user permissions
• Frontend routing shows appropriate interfaces

Access Control Rules

• Servers can ONLY create dine-in orders
• Counter staff can create ANY order type and process payments
• Admins have full system access
• Kitchen staff limited to order status management

Testing the Implementation

1. Test User Accounts

Login with these sample accounts to test different roles:

Admin:
- Username: admin
- Password: admin123

Server:  
- Username: server1
- Password: admin123

Counter:
- Username: counter1  
- Password: admin123

Kitchen:
- Username: kitchen1
- Password: admin123

2. Testing Scenarios

Admin Testing:

1. Login as admin
2. View dashboard with stats and income reports
3. Access all management interfaces
4. Test period filtering on income reports

Server Testing:

1. Login as server1
2. Verify only "Server Interface" and "POS" tabs are visible
3. Create a dine-in order (verify table selection is required)
4. Confirm order type is automatically set to 'dine_in'

Counter Testing:

1. Login as counter1
2. Verify "Counter/Checkout" and "POS" tabs are visible
3. Test order creation for all types (dine-in, takeout, delivery)
4. Switch to payment processing tab
5. Process payment for a completed order

File Structure

New Files Created

frontend/src/components/
├── admin/
│   └── AdminDashboard.tsx         # Admin management interface
├── server/
│   └── ServerInterface.tsx        # Server dine-in order interface  
├── counter/
│   └── CounterInterface.tsx       # Counter order & payment interface
└── RoleBasedLayout.tsx           # Main role routing component

Modified Files

backend/database/init/
├── 01_schema.sql                 # Added server/counter roles
└── 02_seed_data.sql             # Added sample users

backend/internal/
├── models/models.go             # Updated role comments
└── api/routes.go                # Added role-based endpoints

frontend/src/
├── api/client.ts                # Added role-specific API methods
└── routes/index.tsx             # Updated to use RoleBasedLayout

Next Steps

The core role-based system is now complete. Remaining tasks from your TODO list:

1. Admin Menu Management UI - Create admin interface forms for managing categories and products
2. Admin Table Management UI - Create admin interface forms for managing dining tables
3. System Testing - Comprehensive testing of all role-based workflows
4. UI Refinements - Polish the interfaces based on user feedback

Usage Instructions

1. Start the system:

   make dev

2. Login with different roles to see role-specific interfaces

3. Admin users will see the dashboard with full management capabilities

4. Server users will only be able to create dine-in orders

5. Counter users can create any order type and process payments

6. Kitchen users will see the kitchen display system

The system now fully implements your role-based requirements with proper access control and specialized interfaces for each user type.