如何将Firestore监听程序从我的vuex操作中分离？

// firestore.js

import firebase from 'firebase/app';
import 'firebase/firestore';

// 初始化Firestore实例
const firebaseConfig = {
  // 配置你的Firebase项目信息
};

firebase.initializeApp(firebaseConfig);
const db = firebase.firestore();

// 监听程序
const startListening = (callback) => {
  return db.collection('your-collection').onSnapshot((snapshot) => {
    const data = [];
    snapshot.forEach((doc) => {
      data.push({ id: doc.id, ...doc.data() });
    });
    callback(data);
  });
};

// 数据更新方法
const addData = (data) => {
  return db.collection('your-collection').add(data);
};

const updateData = (id, newData) => {
  return db.collection('your-collection').doc(id).update(newData);
};

const deleteData = (id) => {
  return db.collection('your-collection').doc(id).delete();
};

export {
  startListening,
  addData,
  updateData,
  deleteData
};

// store.js

import Vue from 'vue';
import Vuex from 'vuex';
import { startListening, addData, updateData, deleteData } from './firestore';

Vue.use(Vuex);

const store = new Vuex.Store({
  state: {
    data: []
  },
  mutations: {
    setData(state, data) {
      state.data = data;
    }
  },
  actions: {
    startFirestoreListening({ commit }) {
      const unsubscribe = startListening((data) => {
        commit('setData', data);
      });
      // 可选：将unsubscribe函数保存在state中，以便在需要停止监听时调用
      // state.unsubscribe = unsubscribe;
    },
    addFirestoreData(_, data) {
      return addData(data);
    },
    updateFirestoreData(_, { id, newData }) {
      return updateData(id, newData);
    },
    deleteFirestoreData(_, id) {
      return deleteData(id);
    }
  }
});

export default store;