function uuidv4() {
  return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c =>
    // eslint-disable-next-line
    (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
  );
}

export const getOrCreateUserId = () => {
  var uuid = localStorage.getItem("uuid")
  if (uuid === null) {
    localStorage.setItem("uuid", uuidv4())
    uuid = localStorage.getItem("uuid")
  }
  return uuid
}