05. Multiple Classes 👩‍🏫🧑‍🏫

class Item {
  constructor(title, price) {
    this.title = title;
    this.price = price;
  }
}

module.exports = Item;

class Order {
  constructor(item) {
    this.item = item;

    Order.lastId++;
    this.id = Order.lastId;
  }
}
Order.lastId = 0;

module.exports = Order;

const Order = require("./order");
const Item = require("./item");

class Restaurant {
  constructor(name) {
    this.name = name;
    this.orders = [];
    this.revenue = 0;
  }

  takeOrder(order) {
    this.revenue += order.item.price;
    this.orders.push(order);
    console.log(`Added #${order.id} to the queue`);
    this.printRevenue();
  }

  printRevenue() {
    console.log(`${this.name} has made ${this.revenue} so far!`);
  }

  prepareOrders() {
    const prepareInterval = setInterval(() => {
      if (this.orders.length === 0) {
        console.log("Finished cooking all orders!");

        clearInterval(prepareInterval);
      } else {
        const order = this.orders.shift();

        console.log(`#${order.id} has been prepared.`);
      }
    }, 1000);
  }
}

const restaurant = new Restaurant("McJared's");

const items = [
  new Item("Burger", 5.99),
  new Item("Soda", 3.5),
  new Item("Chips", 2.0)
];

const orders = items.map(item => new Order(item));

orders.forEach(order => restaurant.takeOrder(order));

restaurant.prepareOrders();