Why Hotel, Room, Booking classes in LLD? - Purpose & Use Cases

The Big Idea

What if a simple class design could save your hotel from booking chaos?

The Scenario

Imagine managing a hotel by writing down every room and booking on paper or in separate spreadsheets.

Every time a guest arrives, you manually check availability, update records, and track bookings.

The Problem

This manual method is slow and prone to mistakes.

You might double-book rooms or lose track of cancellations.

It becomes hard to scale when the hotel grows or when many guests book at once.

The Solution

Using Hotel, Room, and Booking classes organizes this information clearly in code.

Each class handles its own data and actions, making the system easy to manage and update.

This approach reduces errors and speeds up booking processes.

Before vs After

✗ Before

rooms = ['101', '102']
bookings = []
# Check availability manually
if '101' not in bookings:
    bookings.append('101')

✓ After

class Room:
    def __init__(self, number):
        self.number = number
        self.is_booked = False

class Booking:
    def __init__(self, room):
        self.room = room
        self.room.is_booked = True

What It Enables

This design lets you easily add features like checking availability, cancelling bookings, and scaling to many rooms.

Real Life Example

Online hotel booking websites use similar classes to manage thousands of rooms and bookings instantly and accurately.

Key Takeaways

Manual tracking is slow and error-prone.

Classes organize data and behavior clearly.

Design enables scalable, reliable booking systems.