微信小程序如何保证每个页面都已经登陆详解

const app = getApp()
Page({
  data: {
    logs: []
  },
  onLoad() {
    app.commonLogin(()=>{
        // 处理页页面请求
    })
  }
})

  handlePageParamMerge(arg) {
    let numargs = arg.length; // 获取被传递参数的数值。
    let data = {}
    let page = {}
    for (let ix in arg) {
      let item = arg[ix]
      if (item.data && typeof (item.data) === 'object') {
        data = Object.assign(data, item.data)
      }
      if (item.methods && typeof (item.methods) === 'object') {
        page = Object.assign(page, item.methods)
      } else {
        page = Object.assign(page, item)
      }
    }
    page.data = data
    return page
  }

  
  mergePage() {
    return this.handlePageParamMerge(arguments)
  }

  
  handleCompParamMerge(arg) {
    let numargs = arg.length; // 获取被传递参数的数值。
    let data = {}
    let options = {}
    let properties = {}
    let methods = {}
    let comp = {}
    for (let ix in arg) {
      let item = arg[ix]
      // 合并组件的初始数据
      if (item.data && typeof (item.data) === 'object') {
        data = Object.assign(data, item.data)
      }
      // 合并组件的属性列表
      if (item.properties && typeof (item.properties) === 'object') {
        properties = Object.assign(properties, item.properties)
      }
      // 合组件的方法列表
      if (item.methods && typeof (item.methods) === 'object') {
        methods = Object.assign(methods, item.methods)
      }
      if (item.options && typeof (item.options) === 'object') {
        options = Object.assign(options, item.options)
      }
      comp = Object.assign(comp, item)
    }
    comp.data = data
    comp.options = options
    comp.properties = properties
    comp.methods = methods
    return comp
  }

  
  mergeComponent() {
    return this.handleCompParamMerge(arguments)
  }

  
  newPage() {
    let options = this.handlePageParamMerge(arguments)
    let that = this
    let app = getApp()

    //增加全局点击登录判断
    if (!options.publicCheckLogin){
      options.publicCheckLogin = function (e) {
        let pages = getCurrentPages()
        let page = pages[pages.length - 1]
        let dataset = e.currentTarget.dataset
        let callback = null

        //获取回调方法
        if (dataset.callback && typeof (page[dataset.callback]) === "function"){
          callback = page[dataset.callback]
        }
        // console.log('callback>>', callback, app.isRegister())
        //判断是否登录
        if (callback && app.isRegister()){
          callback(e)
        }
        else{
          wx.navigateTo({
            url: '/pages/login/login'
          })
        }
      }
    }

    const { onLoad } = options
    options.onLoad = function (arg) {
      options.watch && that.setWatcher(this)
      onLoad && onLoad.call(this, arg)
    }

    const { onShow } = options
    options.onShow = function (arg) {
      if (options.data.noAutoLogin || app.isRegister()) {
        onShow && onShow.call(this, arg)
        //页面埋点
        app.ga({})
      }
      else {
        wx.navigateTo({
          url: '/pages/login/login'
        })
      }
    }

    return Page(options)
  }

  
  newComponent() {
    let options = this.handleCompParamMerge(arguments)
    let that = this
    const { ready } = options
    options.ready = function (arg) {
      options.watch && that.setWatcher(this)
      ready && ready.call(this, arg)
    }
    return Component(options)
  }

  
  setWatcher(page) {
    let data = page.data;
    let watch = page.watch;
    Object.keys(watch).forEach(v => {
      let key = v.split('.'); // 将watch中的属性以'.'切分成数组
      let nowData = data; // 将data赋值给nowData
      for (let i = 0; i < key.length - 1; i++) { // 遍历key数组的元素，除了最后一个！
        nowData = nowData[key[i]]; // 将nowData指向它的key属性对象
      }

      let lastKey = key[key.length - 1];
      // 假设key==='my.name',此时nowData===data['my']===data.my,lastKey==='name'
      let watchFun = watch[v].handler || watch[v]; // 兼容带handler和不带handler的两种写法
      let deep = watch[v].deep; // 若未设置deep,则为undefine
      this.observe(nowData, lastKey, watchFun, deep, page); // 监听nowData对象的lastKey
    })
  }

  
  observe(obj, key, watchFun, deep, page) {
    var val = obj[key];
    // 判断deep是true 且 val不能为空 且 typeof val==='object'（数组内数值变化也需要深度监听）
    if (deep && val != null && typeof val === 'object') {
      Object.keys(val).forEach(childKey => { // 遍历val对象下的每一个key
        this.observe(val, childKey, watchFun, deep, page); // 递归调用监听函数
      })
    }
    var that = this;
    Object.defineProperty(obj, key, {
      configurable: true,
      enumerable: true,
      set: function (value) {
        if (val === value) {
          return
        }
        // 用page对象调用,改变函数内this指向,以便this.data访问data内的属性值
        watchFun.call(page, value, val); // value是新值，val是旧值
        val = value;
        if (deep) { // 若是深度监听,重新监听该对象，以便监听其属性。
          that.observe(obj, key, watchFun, deep, page);
        }
      },
      get: function () {
        return val;
      }
    })
  }

app.tool.newPage({
  data: {
    // noAutoLogin: false
  },
  onShow: function () {
    // 在这里写页面请求逻辑
  }
}