generate-list.js

const text = "Congratulations! You won the Unreplied giveaway! Here's your promo code: PROMO. Thanks for participating! Make sure you tell all of your Mac friends about it too, they might like it as well!"

const codes = fs.readFileSync("promo_codes.txt", "utf8").split("\n"); // A text file with a promo code on each line

function generateLine(user) {
    let encodedText = encodeURIComponent(text).replace(/'/g, "%27").replace("PROMO", codes.pop());
    let link = `https://twitter.com/messages/compose?recipient_id=${user.id}&text=${encodedText}`;
    return `${user.name} (@${user.screen_name}) - ${link}`;
}

var lines = luckyUsers.map(generateLine);
fs.writeFileSync("list.json", lines.join("\n"), "utf8");