Deli counter example

deliCounter.js

// Deli Counter
// 1. take a ticket
// 2. check if our number is up
// 3. order from counter if ready
// 4. change the deli inventory on order
// 5. receive our order, from the counter
// 6. pay for the order
// 7. leave if paid

const readline = require("readline");
const readlineInterface = readline.createInterface(
  process.stdin,
  process.stdout
);

function ask(questionText) {
  return new Promise((resolve, reject) => {
    readlineInterface.question(questionText, resolve);
  });
}

class Customer {
  constructor(funds) {
    this.funds = funds;
  }

  makeOrder(someOrderDescription) {
    this.order = someOrderDescription
  }

  takeTicket(ticketNumber) {
    this.ticketNumber = ticketNumber;
  }
}

class Deli {
  constructor(order, ticket) {
    this.order = order;
    this.ticket = ticket;
  }

  take(thing) {
    if (thing === "ticket") {
      this.ticket = 3;
      console.log("Here's a ticket for you. Ticket#" + this.ticket);
      return this.ticket;
    }

    if (thing === "order") {
      this.order = "a bagel with cream cheese";
      console.log("here is your order, it is " + this.order);
      return this.order;
    }
  }

  leave(thing) {
    if (thing === "deli") {
      console.log("Thanks for visiting, please come again!");
      process.exit();
    }
  }
}

async function openDeli() {
  const theDeli = new Deli('', 1);
  while (true) {
    let response = await ask("Hello, how can I help you?\n");

    let parts = response.split(' '); // ["take", "ticket"]

    if (response.startWith("take")) {
      deli.take(parts[1]);
    } else if (response.startsWith("leave")) {
      deli.leave(parts[1]);
    }
  }
}

console.log("Starting up the deli counter:");
openDeli();