Number guessing game in Discord.js using Slash Commands

guess.js

import { SlashCommandBuilder } from "discord.js";
import { gameInfo } from "./startgame.js";

export const data = new SlashCommandBuilder()
  .setName("guess")
  .setDescription("Guess a number between 1 and 100")
  .addIntegerOption((option) =>
    option.setName("number").setDescription("Your guess").setRequired(true)
  );

export async function execute(interaction) {
  if (!gameInfo.game) {
    await interaction.reply(
      "No game is in progress! Use /startgame to start one."
    );
    return;
  }
  const guess = interaction.options.getInteger("number");
  const result = gameInfo.game.guess(guess);
  await interaction.reply(result);
  if (gameInfo.game.number === guess) {
    gameInfo.game = null;
  }
}

startgame.js

import { SlashCommandBuilder } from "discord.js";

export const data = new SlashCommandBuilder()
  .setName("startgame")
  .setDescription("Start a number guessing game");

// needs to be an object so that it stores state across imports/exports
// stores global state
export const gameInfo = {
  // stores a single game object, can be modified to an Array/Map to store 
  // multiple games at a time (eg. for multiple guilds)
  game: null, 
};

export async function execute(interaction) {
  if (gameInfo.game) {
    await interaction.reply("A game is already in progress!");
    return;
  }
  await interaction.reply(
    "Let's start a number guessing game! I'm thinking of a number between 1 and 100. What's your guess? (/guess)"
  );
  gameInfo.game = new NumberGuesser();
}


// A better organisation would be to extract out all the game stuff to a different file outside `commands/` and import them in here.
export class NumberGuesser {
  constructor() {
    this.number = Math.floor(Math.random() * 100) + 1;
    this.guesses = 0;
  }

  guess(n) {
    this.guesses++;
    if (n < this.number) {
      return "Your guess is too low!";
    } else if (n > this.number) {
      return "Your guess is too high!";
    } else {
      return `You got it in ${this.guesses} guesses!`;
    }
  }
}