opportunities-extension/src/auth/xsrf-recovery.js

function createAuthXsrfRecovery({
  COOKIE_REFRESH_POLL_MS,
  COOKIE_REFRESH_TIMEOUT_MS,
  OPPORTUNITIES_LIST_URL,
  getXsrfTokenCookie,
  supportsFirefoxCookieStoreTabs,
  tabsCreate,
  tabsRemove,
  wait
}) {
  async function refreshXsrfCookie(sender) {
    const startedAt = Date.now();
    const previous = (await getXsrfTokenCookie()).cookie;
    const createProperties = {
      url: OPPORTUNITIES_LIST_URL,
      active: false
    };

    if (sender && sender.tab && Number.isInteger(sender.tab.windowId)) {
      createProperties.windowId = sender.tab.windowId;
    }

    if (supportsFirefoxCookieStoreTabs() && sender && sender.tab && sender.tab.cookieStoreId) {
      createProperties.cookieStoreId = sender.tab.cookieStoreId;
    }

    let refreshTab;

    try {
      refreshTab = await tabsCreate(createProperties);
      const current = await waitForXsrfCookieChange(previous);
      const refreshed = hasCookieChanged(previous, current);

      return {
        ok: Boolean(current),
        refreshed,
        cookieName: current ? current.name : "",
        durationMs: Date.now() - startedAt,
        error: refreshed ? "" : "XSRF cookie was not created or changed before timeout."
      };
    } finally {
      if (refreshTab && Number.isInteger(refreshTab.id)) {
        try {
          await tabsRemove(refreshTab.id);
        } catch (error) {
          // The temporary tab may already have been closed.
        }
      }
    }
  }

  async function waitForXsrfCookieChange(previousCookie) {
    const deadline = Date.now() + COOKIE_REFRESH_TIMEOUT_MS;
    let currentCookie = null;

    while (Date.now() < deadline) {
      currentCookie = (await getXsrfTokenCookie()).cookie;

      if (hasCookieChanged(previousCookie, currentCookie)) {
        return currentCookie;
      }

      await wait(COOKIE_REFRESH_POLL_MS);
    }

    return currentCookie;
  }

  function hasCookieChanged(previousCookie, currentCookie) {
    if (!currentCookie || !currentCookie.value) {
      return false;
    }

    if (!previousCookie) {
      return true;
    }

    return previousCookie.name !== currentCookie.name
      || previousCookie.value !== currentCookie.value
      || previousCookie.expirationDate !== currentCookie.expirationDate;
  }

  return { refreshXsrfCookie, waitForXsrfCookieChange, hasCookieChanged };
}