function* flow() {
  while (true) {
    let { payload } = yield take(`${login}`);
    const socket = yield call(connect);
    socket.emit('login', { username: payload.username });

    const task = yield fork(handleIO, socket);

    let action = yield take(`${logout}`);
    yield cancel(task);
    socket.emit('logout');
  }
}

export default function* rootSaga() {
  yield fork(flow);
}