Barber Appointment Booking System

A TypeScript library for managing barber shop appointments, built with clean architecture principles and strict type safety.

Features

• 📅 Appointment scheduling and management
• 👥 Customer management
• 💇‍♂️ Service catalog management
• ⏰ Time slot management
• 📊 Booking statistics and reporting
• 🔄 Flexible repository pattern
• 🎯 Use case driven architecture
• 📝 Strong type safety with Zod validation

Installation

# Using bun
bun add @your-org/appointments

# Using npm
npm install @your-org/appointments

# Using yarn
yarn add @your-org/appointments

Quick Start

import { createAppointmentSystem } from '@your-org/appointments';

// Create an instance of the appointment system
const appointmentSystem = createAppointmentSystem();

// Schedule an appointment
async function scheduleAppointment() {
  try {
    const appointment = await appointmentSystem.appointments.schedule.execute({
      customerId: 'customer-uuid',
      serviceId: 'service-uuid',
      barberId: 'barber-uuid',
      startTime: new Date(),
      notes: 'First time customer',
    });

    console.log('Appointment scheduled:', appointment);
  } catch (error) {
    console.error('Failed to schedule appointment:', error);
  }
}

// Query appointments
async function getUpcomingAppointments() {
  const result = await appointmentSystem.appointments.query.execute({
    startDate: new Date(),
    status: 'confirmed',
    page: 1,
    pageSize: 10,
    sortBy: 'startTime',
    sortDirection: 'asc',
  });

  console.log('Upcoming appointments:', result);
}

Architecture

The library follows Clean Architecture principles with the following layers:

Domain Layer

• Core business entities and logic
• Repository interfaces
• Domain events and types

Application Layer

• Use cases implementing business operations
• Input validation and error handling
• Business rules enforcement

Infrastructure Layer

• Repository implementations
• External service integrations
• Data persistence

API Documentation

Appointments

Schedule Appointment

const appointment = await appointmentSystem.appointments.schedule.execute({
  customerId: string;
  serviceId: string;
  barberId: string;
  startTime: Date;
  notes?: string;
});

Cancel Appointment

await appointmentSystem.appointments.cancel.execute({
  appointmentId: string;
  cancellationReason: string;
  cancelledBy: string;
});

Reschedule Appointment

await appointmentSystem.appointments.reschedule.execute({
  appointmentId: string;
  newStartTime: Date;
  barberId: string;
  rescheduledBy: string;
  reason?: string;
});

Complete Appointment

await appointmentSystem.appointments.complete.execute({
  appointmentId: string;
  completedBy: string;
  notes?: string;
  feedback?: {
    rating?: number;
    comment?: string;
    serviceQuality?: number;
    timeliness?: number;
    cleanliness?: number;
  };
  paymentStatus: 'PAID' | 'PENDING' | 'FAILED';
  paymentMethod?: 'CASH' | 'CARD' | 'DIGITAL_WALLET';
});

Repositories

The library provides built-in in-memory repositories and interfaces for implementing custom storage solutions:

interface IRepository<T> {
  findById(id: string): Promise<T | null>;
  findAll(): Promise<T[]>;
  create(entity: T): Promise<T>;
  update(id: string, entity: T): Promise<T>;
  delete(id: string): Promise<void>;
}

interface IAdvancedRepository<T> extends IRepository<T> {
  findWithFilters(filters: IFilterOptions, options?: IQueryOptions): Promise<IPagedResult<T>>;
  exists(filter: IFilterOptions): Promise<boolean>;
  count(filter?: IFilterOptions): Promise<number>;
  findOne(filter: IFilterOptions): Promise<T | null>;
}

Error Handling

The library uses custom error classes for different scenarios:

try {
  await appointmentSystem.appointments.schedule.execute(/* ... */);
} catch (error) {
  if (error instanceof ScheduleAppointmentError) {
    // Handle scheduling specific error
    console.error(`Scheduling failed: ${error.message} (${error.code})`);
  } else {
    // Handle other errors
    console.error('Unexpected error:', error);
  }
}

Development

# Install dependencies
bun install

# Run tests
bun test

# Build the library
bun run build

# Type check
bun run lint

Contributing

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

License

This project is licensed under the MIT License with the Commons Clause.

What Does This Mean?

• You may freely use, modify, and distribute this software for non-commercial purposes.
• If you wish to use this software in a commercial product or service, you must obtain a commercial license from [Your Name or Company].

For more details, see the LICENSE file.

Support

For support, please open an issue in the GitHub repository or contact the maintainers.