background.js

const playSound = () => {
    if (typeof (audio) != "undefined" && audio) {
        audio.pause();
        document.body.removeChild(audio);
        audio = null;
    }
    audio = document.createElement('audio');
    document.body.appendChild(audio);
    audio.autoplay = true;
    audio.src = chrome.extension.getURL('tada.mp3');
    audio.play();
};

const sendTelegramMessage = () => {
    const botToken = localStorage.getItem('KTX_MACRO::bot-token');
    const chatId = localStorage.getItem('KTX_MACRO::chat-id');

    if (!botToken || !chatId) {
        return;
    }

    const msg = encodeURI('예약을 시도하였습니다. 예약을 확인해주세요.');
    const url = `https://api.telegram.org/bot${botToken}/sendmessage?chat_id=${chatId}&text=${msg}`;

    fetch(url);
}

chrome.extension.onMessage.addListener((message, sender, sendResponse) => {
    if (message && message.type == 'successTicketing') {
        playSound();
        sendTelegramMessage();
        sendResponse(true);
    }
});