background_script.js

let scriptActivated = !1,
  tabDetails,
  status_updates = {};
function getMsg(t, e) {
  return { msg: { type: t, data: e }, sender: 'popup', id: 'irctc' };
}
chrome.runtime.onMessage.addListener((t, e, s) => {
  if ('irctc' !== t.id) {
    s('Invalid Id');
    return;
  }
  let a = t.msg.type,
    i = t.msg.data;
  'activate_script' === a
    ? (chrome.tabs.create(
        { url: 'https://www.irctc.co.in/nget/train-search' },
        (t) => {
          (tabDetails = t),
            chrome.scripting.executeScript({
              target: { tabId: t.id },
              files: ['./content_script.js'],
            });
        }
      ),
      s('Script activated'))
    : 'status_update' === a
    ? (status_updates[e.id] || (status_updates[e.id] = []),
      status_updates[e.id].push({ sender: e, data: i }))
    : s('Something went wrong');
}),
  chrome.tabs.onUpdated.addListener((t, e, s) => {
    t === tabDetails?.id &&
      e?.status === 'complete' &&
      (s.url.includes('booking/train-list') &&
        chrome.tabs.sendMessage(tabDetails.id, getMsg('selectJourney')),
      s.url.includes('booking/psgninput') &&
        chrome.tabs.sendMessage(tabDetails.id, getMsg('fillPassengerDetails')),
      s.url.includes('booking/reviewBooking') &&
        chrome.tabs.sendMessage(tabDetails.id, getMsg('reviewBooking')),
      s.url.includes('payment/bkgPaymentOptions') &&
        chrome.tabs.sendMessage(tabDetails.id, getMsg('bkgPaymentOptions')));
  });