const getAllHistory = function (): Record<string, string[]> {
  const unparsedHistory = localStorage.getItem(STORAGE_KEY);
  if (unparsedHistory === null) {
    return {};
  }
  // parse history
  let history;
  try {
    history = JSON.parse(unparsedHistory);
  } catch (e) {
    if (e instanceof SyntaxError) {
      console.log('Local storage ' + STORAGE_KEY + ' was not valid JSON', e);
      return {};
    }
    throw e;
  }
  // validate the parsed value
  if (!isRecordOfUrlArray(history)) {
    console.log('Local storage ' + STORAGE_KEY + ' was not valid format', history);
    return {};
  }
  return history;
};

const sClearHistory = Step.sync(() => {
  localStorage.removeItem('tinymce-url-history');
});