pk8f3pmu2/pages/classsetting/classsetting.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');
// pages/classsetting/classsetting.js
Page({

  /**
   * 页面的初始数据
   */
  class: null,
  data: {
    classname:"",
    new_classname:"",
    presences:[],
    teacher_id: ""
  },
  update_classname: function({detail: {value}}){
    this.setData({new_classname:value})
  },
  change_name:function(event){
    let {new_classname} =this.data 
    this.class.set("name", new_classname).save().then(()=>{
      wx.showToast({
        title:"更新成功"
      });
      this.setData({classname: new_classname});
    },()=>{
      wx.showToast({
        title:"操作失败",
        icon:"none"
      })
    });
  },
  del_class:function(event){
    class_ = this.class;
    wx.showModal({
      title: '确认',
      content: '删除课程会删除该课程相关的一切数据',
      success: res=>{
        if(res.confirm){
          wx.showLoading({
            title: '请稍候',
          })
          query_presence = new AV.Query("Presence");
          query_presence.equalTo("class", class_);
          query_presence.find().then(AV.Object.destroyAll);
          query_message = new AV.Query("Message");
		      query_message.equalTo("class", class_);
		      query_message.find().then(AV.Object.destroyAll);
          query_file = new AV.Query("File_");
          query_file.equalTo("class", class_);
          query_file.find().then(files=>{
            filelist = files.map(file=>file.get("fileid"));
            wx.cloud.deleteFile({
              fileList: filelist,
              success: res => {
                // handle success
                console.log(res.fileList)
              },
              fail: console.error
            })
            AV.Object.destroyAll(files)});
          class_.destroy().then(()=>{
            wx.hideLoading();
            wx.showToast({
              title: '删除成功',
            });
            wx.navigateBack({
              delta: 2
            })
            });
        }
      }
    })
  },
  del_student:function(event){
    presence_id = event.currentTarget.dataset.id;
    pull_presences = this.pull_presences.bind(this);
    wx.showModal({
      title: '确认',
      content: '是否将该学员从课程中移除?',
      success: res => {
        if (res.confirm) {
          AV.Object.createWithoutData("Presence", presence_id).destroy().then(()=>{
            pull_presences();
            wx.showToast({
              title: '移除成功',
            })}, ()=>{
              wx.showToast({
                title: '移除失败',
                icon:"none"
              })
            });
        }
      }
    })
  },
  pull_presences:function(){
    query = new AV.Query("Presence");
    query.equalTo("class", this.class);
    query.include("user");
    query.find().then(this.set_presences);
  },

  set_presences:function(presences){
    presences = presences.map(presence=>{
      user = presence.get("user");
      presence.set("student_username", user.get("username"));
      presence.set("student_name", user.get("name"));
      presence.set("student_id", user.get("objectId"))
      return presence;
    })
    this.setData(jsonify({presences}));
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    classname = options.classname;
    class_id = options.class_id;
    teacher_id = options.teacher_id;
    console.log(teacher_id);
    this.class = AV.Object.createWithoutData("Class_", class_id);
    this.setData({
      teacher_id: teacher_id,
      classname:classname
      });
    this.pull_presences();
    console.log(this.data);
  },

  /**
   * 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_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 () {

  }
})