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// pages/classroom/classroom.js
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const AV = require("../../lib/av-live-query-weapp-min")
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const { jsonify } = require('../../utils/leancloudutils');
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const bind = require("../../lib/live-query-binding")
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Page({
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/**
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页面的初始数据
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students: 该课程所有的学生
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元素student
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student.objectId 该学生的主键，唯一
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student.username 学生的用户名，是唯一，就像微信号一样
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student.name 学生的姓名
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student.present 是否出席
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student.isasking :0:没有提问,1:提问,2:请回答
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*/
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students: [],
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presences: [],
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my_presence: null,
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is_askiny: null,
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data: {
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//以下数据的同步由该代码文件实现，数据的呈现由classroom.wxml实现
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students: [], // 该课程所有的学生, 元素类型见上文中的student
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current_user: null, //目前登陆的用户,类型为对象，属性有objectId，username, name
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teacher: null,
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select_stu_id: '',
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//该课程教员,类型为对象
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//请在进入界面时判断用户是否为教员以给与权限或更改界面
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//属性如下：objectId, username, name
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class_name: "", //课程名称
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class_id: "", //该课程的主键（编号)
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},
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select_stu: function(event){
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id = event.currentTarget.dataset.id;
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if(id!='none'){
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console.log(id);
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}else{console.log("none");id=""}
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this.setData({select_stu_id: id});
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},
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set_isasking: function(event){
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userid = event.currentTarget.dataset.id;
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status = event.currentTarget.dataset.status;
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console.log("set_isasking");
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console.log(status);
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console.log(typeof status);
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this.asking_present = this.presences.filter(presence=>presence.get("user").id==userid)[0];
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this.asking_present.isasking = status;
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wx.showLoading({
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title: '',
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})
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this.asking_present.save().then(()=>{
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wx.hideLoading();
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}, ()=>{
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wx.hideLoading();
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wx.showToast({
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title: '操作失败',
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icon: "none"
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})
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});
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},
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add_mark: function(event){
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id = event.currentTarget.dataset.id;
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mark = event.currentTarget.dataset.mark;
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console.log("add_mark");
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console.log(mark);
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console.log(typeof mark);
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presence = this.presences.filter(presence => presence.get("user").id == id)[0];
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if(presence==null){
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console.warn("没有选择学生");
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}
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presence.increment("mark", mark).save().then(()=>{
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wx.showToast({
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title: '操作成功',
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icon:"none"
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})
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}).catch(error=>console.error(error.message));
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},
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pull_presence: function(){
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var query = new AV.Query("Presence");
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//console.log(this.class);
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query.equalTo("class", this.class);
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query.include("user");
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set_presence = this.set_presence.bind(this);
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return AV.Promise.all([query.find().then(set_presence), query.subscribe()]).then(([presents, subscription])=>{
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this.PresentSubscription = subscription;
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if(this.presentUnbind) this.presentUnbind();
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this.presentUnbind = bind(subscription, presents, set_presence);
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}).catch(error=> console.error(error.message));
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},
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set_presence: function(presences){
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console.log("set_presence");
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//console.log(presences);
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this.presences = presences;
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console.log(this.presences);
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students = this.presences.map((presence)=>{
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student = presence.get("user");
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if(student.get("username")==null){
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students = this.students.filter(stu=>stu.id==student.id)
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if(students.length==1){
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student = students[0];
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}else{
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student.fetch();
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}
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}
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student.set("present", presence.get("present"));
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student.set("isasking",presence.get("isasking"));
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student.set("mark", presence.get("mark"));
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if(student.id==AV.User.current().id){
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this.my_presence = presence;
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this.setData({current_user:student.toJSON()});
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}
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return student;
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});
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this.students = students;
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console.log(students);
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this.setData(jsonify({students}));
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return presences;
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},
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fetch_class: function(class_id){
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query = new AV.Query("Class_");
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query.equalTo("objectId", class_id);
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query.include("teacher");
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return query.find().then((classes) => {
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//console.log(this.class);
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this.class = classes[0];
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teacher = this.class.get("teacher");
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console.log("fetch_class");
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console.log(teacher);
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teacher = teacher.toJSON();
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// if(typeof teacher.toJson == "function"){
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// teacher = teacher.toJson();
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// console.log("toJson");
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// }
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this.setData({
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class_name: this.class.get("name"),
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class_id: this.class.get("objectId"),
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teacher: teacher
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});
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console.log(teacher);
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//this.setData(teacher);
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}).catch(error=>console.error(error.message))
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},
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/**
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* 生命周期函数--监听页面加载
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*/
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onLoad: function (options) {
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wx.showLoading({
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title: '加载中'
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})
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this.setData({current_user: AV.User.current().toJSON()});
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this.class_id = options.class_id;
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this.fetch_class.bind(this)(this.class_id)
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.then(()=>{
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console.log("pull_presence");
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this.pull_presence.bind(this)().then((presences) => { this.my_presence.enter(); this.presences = presences;});
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wx.hideLoading();
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console.log("hideLoading");
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});
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console.log("onLoad");
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},
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/**
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* 生命周期函数--监听页面初次渲染完成
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*/
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onReady: function () {
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console.log("onReady");
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},
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/**
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* 生命周期函数--监听页面显示
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*/
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onShow: function () {
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console.log("onShow");
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console.log("enter class when onShow");
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console.log(AV.User.current());
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if(this.my_presence){
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this.my_presence.enter();
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}
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},
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/**
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* 生命周期函数--监听页面隐藏
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*/
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onHide: function () {
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this.my_presence.leave();
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console.log("onHide");
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},
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/**
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* 生命周期函数--监听页面卸载
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*/
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onUnload: function () {
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this.my_presence.leave();
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console.log("onUnload");
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this.PresentSubscription.unsubscribe();
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this.presentUnbind();
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},
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/**
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* 页面相关事件处理函数--监听用户下拉动作
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*/
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onPullDownRefresh: function () {
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this.pull_presence.bind(this)();
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},
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/**
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* 页面上拉触底事件的处理函数
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*/
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onReachBottom: function () {
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},
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/**
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* 用户点击右上角分享
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*/
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onShareAppMessage: function () {
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console.log("onShareAppMessage");
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}
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}) |
