library.js

const checkAvailability = (itemName, distributorName) => {
    console.log(`Checking availability of ${itemName} at ${distributorName}...`);
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            if (restockSuccess()) {
                console.log(`${itemName} are in stock at ${distributorName}`)
                resolve(itemName);
            } else {
                reject(`Error: ${itemName} is unavailable from ${distributorName} at this time.`);
            }
        }, 1000);
    });
};

module.exports = { checkAvailability };


// This is a function that returns true 80% of the time
// We're using it to simulate a request to the distributor being successful this often
function restockSuccess() {
    return (Math.random() > .2);
}