async-await.js

const state = {
    stock: {
        coffeeBeans: 250,
        water: 1000,
    },
    isCoffeeMachineBusy: false,
}

const checkAvailability = () => {
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            if (!state.isCoffeeMachineBusy) {
                resolve("Mesin kopi siap digunakan.");
            } else {
                reject("Maaf, mesin sedang sibuk.");
            }
        }, 1000);
    });
};

const checkStock = () => {
    return new Promise((resolve, reject) => {
        if (state.stock.coffeeBeans >= 16 && state.stock.water >= 250) {
            resolve("Stok cukup. Bisa membuat kopi");
        } else {
            reject("Stok tidak cukup");
        }
    })
};

const boilWater = () => {
    return new Promise((resolve, reject) => {
        console.log("Memanaskan air...");
        setTimeout(() => {
            resolve("Air panas sudah siap!");
        }, 2000);
    })
}
 
const grindCoffeeBeans = () => {
    return new Promise((resolve, reject) => {
        console.log("Menggiling biji kopi...");
        setTimeout(() => {
            resolve("Kopi sudah siap!");
        }, 1000);
    })
}

const brewCoffee = () => {
    console.log("Membuatkan kopi Anda...")
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            resolve("Kopi sudah siap!")
        }, 2000);
    });
};

async function makeEspresso() {
    try {
        const isAvailable = await checkAvailability();
        console.log(isAvailable);

        const enoughStock = await checkStock();
        console.log(enoughStock);

        const process = await Promise.all([boilWater(), grindCoffeeBeans()]);
        console.log(process);

        const coffee = await brewCoffee();
        console.log(coffee);

    } catch (rejectedReason) {
        console.log(rejectedReason);
    }
}

makeEspresso();