pk8f3pmu2/pages/addclass/addclass.js

// pages/addclass/addclass.js
const AV = require("../../lib/av-live-query-weapp-min")
const Presence = require("../../model/presence")
const Class = require("../../model/class")
const { jsonify } = require('../../utils/leancloudutils');

Page({

  /**
   * 页面的初始数据
   */
  classes: [],
  current_user: null,
  data: {
    loading: true,
    classes: []
  },
  
  add_class:function(event){
    class_id = event.currentTarget.dataset.id;
    class_name = event.currentTarget.dataset.name;
    pull_presences = this.pull_presences.bind(this);
    wx.showModal({
      title: '确认',
      content: '是否加入学习'+class_name,
      success(res) {
        if (res.confirm) {
          class_ = AV.Object.createWithoutData("Class_", class_id);
          presence = new Presence({
            user: AV.User.current(),
            class: class_
          });
          wx.showLoading({
            title: '请稍候',
          })
          presence.save().then(()=>{
            pull_presences();
            wx.hideLoading();
            wx.showToast({
              title: '加入成功',
              icon: "success"
            })
            },
            () => {
              wx.hideLoading();
              wx.showToast({
                title: '加入失败',
                icon: "none"
              })
            }).catch(error=>console.error(error.message));
        } 
      }
    })
  },

  pull_classes: function(){
    query = new AV.Query("Class_");
    return query.find().then(classes=>{console.log(classes);this.classes=classes});
  },
  pull_presences: function(){
    query = new AV.Query("Presence");
    query.equalTo("user", AV.User.current());
    query.include("class");
    return query.find().then(this.set_presences.bind(this));
  },
  set_presences: function(presences){
    console.log("set_presences");
    console.log(presences);
    present_class_ids = presences.map(presence=>presence.get("class").id);
    classes = [];
    current_user = this.current_user;
    this.classes.map(class_=>{
      teacher = class_.get("teacher");
      if(present_class_ids.indexOf(class_.id)>-1 || current_user.id==teacher.id){
        class_.set("present", true);
      }else{
        class_.set("present", false);
        classes.push(class_);
      }
    });
    console.log(classes);
    this.setData(jsonify({classes}));
    this.setData({loading: false});
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    wx.showLoading({
      title: '加载中',
    })
    this.current_user = AV.User.current();
    this.pull_classes().then(this.pull_presences).then(wx.hideLoading);
  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {

  },

  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide: function () {

  },

  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {

  },

  /**
   * 页面相关事件处理函数--监听用户下拉动作
   */
  onPullDownRefresh: function () {
    this.pull_classes().then(this.pull_presences);
  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {

  },

  /**
   * 用户点击右上角分享
   */
  onShareAppMessage: function () {

  }
})