options.js

const checkSpoofing = document.getElementById("spoofing_checkbox");
const checkAutoDisable = document.getElementById("autodisable_checkbox");

// If the user checks the checkbox, then trigger a permission request.
// If the user denies the request, then switch the checkbox back to "unchecked".
// If the user unchecks the checkbox, then drop the additional permissions.
async function checkSpoofingChanged(e) {
  const permissions = {
    origins: ["<all_urls>"],
    permissions: ["webRequest", "webRequestBlocking"]
  };

  if (checkSpoofing.checked) {
    const success = await browser.permissions.request(permissions);
    if (!success)
      checkSpoofing.checked = false;
  }
  else
    await browser.permissions.remove(permissions);

  await browser.runtime.sendMessage({type: "OptionsChanged"});
}

async function CheckboxChanged(e) {
  if (e.target.id.match(/([a-z_]+)_checkbox/)) {
    let pref = RegExp.$1;
    let params = {};
    params[pref] = e.target.checked;
    await browser.storage.local.set(params);
    await browser.runtime.sendMessage({type: "OptionsChanged"});
  }
}

function init() {
  // Spoofing info contains HTML
  const spoofing_info = browser.i18n.getMessage("spoofing_info");
  if (spoofing_info.match(/^([^<]*)<a>([^<]+)<\/a>(.*)$/)) {
    document.getElementById("spoofing_info_before").textContent = RegExp.$1;
    document.getElementById("spoofing_info_link").textContent = RegExp.$2;
    document.getElementById("spoofing_info_after").textContent = RegExp.$3;
  }

  loadOptions();
  checkSpoofing.addEventListener("change", checkSpoofingChanged);
  checkAutoDisable.addEventListener("change", CheckboxChanged);
}

function loadOptions() {
  checkSpoofing.checked = (browser.webRequest !== undefined)

  browser.storage.local.get().then((result) => {
    checkAutoDisable.checked = result.autodisable || false;
  });
}

// Register event listener to receive option update notifications
browser.runtime.onMessage.addListener((data, sender) => {
  if (data.type == "OptionsChanged")
    loadOptions();
});

init();