inactivity.js

function* countdown() {
  yield call(delay, toMilliseconds(480));
  yield put(showLogoutWarning());
  yield call(delay, toMilliseconds(120));
  yield put(logout());
}

function* watchForActivity() {
  while (true) {
    yield takeLatest(action => action.type !== ' SHOW_LOGOUT_WARNING', countdown);
  }
}

function* watchNavigation() {
  while(true) {
    let task;
    const action = yield take(['NAVIGATE', 'LOGOUT']);

    if (task) {
      yield cancel(task);
    }

    if (action.type === 'NAVIGATE' && isSensitiveRoute(action.url)) {
      task = yield fork(watchForActivity);
    }
  }
}