HR Leave Management System

A comprehensive, production-ready HR leave management system built with React, TypeScript, and Tailwind CSS. This system provides a complete solution for managing employee leave requests with role-based access control.

🚀 Features

Multi-Role Support

• Employee Portal: Submit requests, view balances, track history
• Manager Portal: Approve/reject team requests, dashboard oversight
• HR Portal: User management, system reports, administrative controls

Core Functionality

• ✅ Leave request submission and approval workflow
• ✅ Real-time leave balance tracking
• ✅ Automated notifications and status updates
• ✅ Comprehensive audit trail
• ✅ Mobile-responsive design
• ✅ Role-based access control
• ✅ Dashboard analytics and reporting

Leave Types Supported

• Annual Leave
• Sick Leave
• Personal Leave
• Maternity Leave
• Emergency Leave

🛠 Technology Stack

• Frontend: React 18, TypeScript
• Styling: Tailwind CSS
• Icons: Lucide React
• Date Management: date-fns
• Build Tool: Vite
• Development: Hot Module Replacement, ESLint

📋 Prerequisites

Before running this application, ensure you have:

• Node.js (version 16 or higher)
• npm or yarn package manager
• Modern web browser

🚀 Installation & Setup

1. Clone the Repository

git clone <repository-url>
cd hr-leave-management-system

2. Install Dependencies

npm install
# or
yarn install

3. Start Development Server

npm run dev
# or
yarn dev

The application will be available at http://localhost:5173

4. Build for Production

npm run build
# or
yarn build

5. Preview Production Build

npm run preview
# or
yarn preview

👥 Demo Users

The system includes pre-configured demo users for testing:

Role	Name	Email	Password
Employee	John Doe	john.doe@company.com	password123
Manager	Sarah Johnson	sarah.johnson@company.com	password123
HR Admin	Lisa Chen	hr.admin@company.com	password123
Employee	Mike Wilson	mike.wilson@company.com	password123

🏗 System Architecture

Frontend Architecture

src/
├── components/           # Reusable UI components
│   ├── auth/            # Authentication components
│   ├── dashboard/       # Dashboard widgets
│   ├── hr/              # HR-specific components
│   ├── layout/          # Layout components
│   ├── leaves/          # Leave management components
│   └── ui/              # Base UI components
├── context/             # React Context providers
├── data/                # Mock data and API simulation
├── hooks/               # Custom React hooks
└── types/               # TypeScript type definitions

Component Structure

• Modular Design: Each component focuses on a single responsibility
• Reusable UI: Consistent design system with reusable components
• Type Safety: Full TypeScript integration for better development experience
• Context Management: Centralized state management for authentication and data

📱 User Interfaces

Employee Dashboard

• Personal leave balance overview
• Quick leave request submission
• Request history and status tracking
• Calendar integration

Manager Dashboard

• Team leave request approvals
• Team calendar overview
• Leave balance monitoring
• Approval workflow management

HR Administrative Panel

• Employee management
• System-wide leave reports
• Policy configuration
• User role management

🔐 Security Features

• Role-based access control (RBAC)
• Secure authentication simulation
• Data validation and sanitization
• Permission-based UI rendering

🎨 Design System

Color Palette

• Primary: Blue (#3B82F6) - Actions, links, primary elements
• Success: Green (#10B981) - Approved requests, positive actions
• Warning: Amber (#F59E0B) - Pending requests, attention needed
• Error: Red (#EF4444) - Rejected requests, errors
• Gray Scale: Neutral colors for text and backgrounds

Typography

• Clean, professional font hierarchy
• Proper contrast ratios for accessibility
• Responsive text sizing

Layout

• 8px spacing system for consistency
• Card-based design for content organization
• Responsive grid layouts
• Mobile-first approach

📊 Workflow Management

Leave Request Process

1. Submission: Employee submits leave request
2. Routing: Request routed to appropriate manager
3. Review: Manager reviews and approves/rejects
4. Notification: Automated status updates
5. Balance Update: Leave balances automatically adjusted
6. Archive: Request archived with audit trail

Approval Hierarchy

• Employees → Direct Manager → HR (for special cases)
• Automatic routing based on organizational structure
• Escalation rules for delayed approvals

🚀 Future Enhancements

Planned Features

• Email notification integration
• Calendar synchronization (Google Calendar, Outlook)
• Mobile application
• Advanced reporting and analytics
• Integration with payroll systems
• Multi-language support
• Document attachments for requests

Technical Improvements

• Backend API integration
• Database persistence
• Real-time notifications
• Automated testing suite
• Performance optimization
• PWA capabilities

🧪 Testing

Run the linting checks:

npm run lint

📝 Development Guidelines

Code Organization

• Follow component-based architecture
• Maintain single responsibility principle
• Use TypeScript for type safety
• Implement proper error handling

Styling

• Use Tailwind CSS utility classes
• Maintain consistent spacing (8px system)
• Ensure responsive design
• Follow accessibility guidelines

State Management

• Use React Context for global state
• Custom hooks for data fetching
• Immutable state updates
• Proper error boundaries

🤝 Contributing

1. Fork the repository
2. Create a feature branch
3. Commit your changes
4. Push to the branch
5. Create a Pull Request

📄 License

This project is licensed under the MIT License.

🆘 Support

For support and questions:

• Create an issue in the repository
• Contact the development team
• Refer to the documentation

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Note: This is a demonstration application with mock data. For production use, integrate with a proper backend API and database system following the architectural patterns established in this codebase.