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# Step 4: Check if a class is already booked

## What you gain

You learn to read the state of a button before acting: "Book Class", "Join Waitlist", "Booked" or "Waitlisted". A class that is already booked is not clicked again, and the bot prints a ✓ line that says what it did.

## Where it is in the code

`src/snack_and_lift/domain/rules.py`

## Screenshot

![Step 4: Check if a class is already booked](https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/049-snack-and-lift/raw/branch/main/docs/images/step-4.png)

> This screenshot needs a run with a real gym account. The maintainer adds it with `--screenshot-dir` (see [Getting started](Getting-Started)); until then the file `docs/images/step-4.png` is missing and the image above does not show.

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