products.js

/**
 * Lista de productos para el menu del restaurante
 */
const products = [
    {
        name: 'Hamburguesa simple',
        price: 8000,
        code: 'H100'
    },
    {
        name: 'Hamburguesa especial',
        price: 12000,
        code: 'H200'
    },
    {
        name: 'Papas fritas',
        price: 3000,
        code: 'P100'
    },
    {
        name: 'Coca-Cola',
        price: 3000,
        code: 'C100'
    }
];

scripts.js

// 1. mostrar el menú disponible ✔
// 2. permitir que el usuario pida elementos del menú ✔
// 3. mostrar el costo total que el usuario debe pagar ✔
// 4. cobrar al usuario ✔
// 5. reportar el monto total de ventas realizadas. ✔

// Client
const user = {
    name: 'Stiven',
    order: [],
    totalPay: 0
};
// Restaurant, store sales made.
const restaurant = {
    salesMade: 0
}

// Show products list in a nice way
const showMenu = () => {
    let menu = 'CODE - PRODUCT NAME - PRICE';
    for ( let product of products) {
        let {code, name, price} = product;
        menu += `\n${code} - ${name} - ${price}`;
    }
    return menu;
};

// Add a product to client order
const makeOrder = ( productCode ) => {
    const found = products.find( product => product.code === productCode );
    if ( !found ) return 'Product does not exist.'
    user.order.push( found );
    user.totalPay += found.price;
    return user.order;
};

// Show client's total to pay
const showTotalPay = () => `Total to pay: ${user.totalPay}`;

const payOrder = ( payment ) => {
    const pay = () => {
        restaurant.salesMade += user.totalPay;
        user.order = [];
        user.totalPay = 0;
    };
    
    if ( payment < user.totalPay ) {
        return `insufficient, ${user.totalPay - payment} dollars missing`
    } else if ( payment === user.totalPay ) {
        pay();
        return 'Paid order'
    } else {
        const rtrn = payment - user.totalPay;
        pay();
        return `Paid order, your return is ${rtrn}`;
    }
};