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350 lines
8.6 KiB
350 lines
8.6 KiB
// pages/rollCall/rollCall.js
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const db = wx.cloud.database();
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Page({
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data: {
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students: [],
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currentStudent: null,
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score: '',
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effects: [
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{ name: '+0分', value: 0, type: 'add' },
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{ name: '+1分', value: 1, type: 'add' },
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{ name: '+2分', value: 2, type: 'add' },
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{ name: '+3分', value: 3, type: 'add' },
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{ name: '+4分', value: 4, type: 'add' },
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{ name: '+5分', value: 5, type: 'add' },
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{ name: '-1分', value: -1, type: 'add' },
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{ name: '-2分', value: -2, type: 'add' },
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{ name: '积分乘2', value: 2, type: 'multiply' },
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{ name: '积分除2', value: 0.5, type: 'divide' }
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],
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page: 1,
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pageSize: 10,
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hasMore: true
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},
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loadAllStudents: function() {
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const that = this;
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const loadNextPage = function() {
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const studentsCollection = db.collection('users');
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studentsCollection.skip((that.data.page - 1) * that.data.pageSize).limit(that.data.pageSize).get({
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success: res => {
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if (res.data.length === 0) {
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that.setData({
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hasMore: false
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});
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return;
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}
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let newStudents = that.data.students.concat(res.data);
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that.setData({
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students: newStudents,
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page: that.data.page + 1
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});
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// 如果还有更多数据，继续加载下一页
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if (that.data.hasMore) {
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loadNextPage();
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}
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},
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fail: err => {
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console.error('学生数据加载失败：', err);
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}
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});
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};
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loadNextPage();
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},
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onLoad: function() {
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this.loadAllStudents();
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},
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// 按积分加权随机点名
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weightedRandomRollCall: function() {
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const students = this.data.students;
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if (students.length === 0) {
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wx.showToast({
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title: '没有可点名的学生',
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icon: 'none',
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duration: 2000
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});
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return;
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}
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const weights = students.map(student => 1 / (student.score + 1));
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const totalWeight = weights.reduce((sum, weight) => sum + weight, 0);
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const randomWeight = Math.random() * totalWeight;
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let cumulativeWeight = 0;
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let selectedStudent = null;
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for (let i = 0; i < weights.length; i++) {
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cumulativeWeight += weights[i];
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if (cumulativeWeight >= randomWeight) {
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selectedStudent = students[i];
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break;
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}
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}
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if (selectedStudent) {
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this.setData({
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currentStudent: selectedStudent
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});
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console.log(this.data.currentStudent)
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wx.showToast({
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title: `点到：${selectedStudent.name}`,
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icon: 'none',
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duration: 2000
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});
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} else {
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wx.showToast({
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title: '未抽到学生',
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icon: 'none',
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duration: 2000
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});
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}
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},
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// 用户输入分数
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inputScore: function(e) {
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this.setData({
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score: e.detail.value
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});
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},
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// 更新分数
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updatescore: function() {
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let db = wx.cloud.database()
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let userCollection = db.collection('users')
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const xuehao = this.data.currentStudent.num;
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const inputScore = this.data.score;
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if (!xuehao || inputScore === '') {
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wx.showToast({
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title: '信息不完整',
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icon: 'none',
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duration: 2000
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});
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return;
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}
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const newScore = parseFloat(this.data.currentStudent.score) + parseFloat(inputScore);
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userCollection.where({
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num: xuehao
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}).update({
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data: {
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score: newScore
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}
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}).then(res => {
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console.log('更新成功');
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wx.showToast({
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title: '分数更新成功',
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icon: 'success',
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duration: 2000
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});
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}).catch(err => {
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console.log('更新失败', err);
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})
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},
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addHalfScore: function() {
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if (this.data.currentStudent) {
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this.updateStudentScore(0.5);
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} else {
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wx.showToast({
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title: '请先随机点名一个学生',
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icon: 'none',
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duration: 2000
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});
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}
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},
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addoneScore: function() {
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if (this.data.currentStudent) {
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this.updateStudentScore(1);
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} else {
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wx.showToast({
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title: '请先随机点名一个学生',
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icon: 'none',
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duration: 2000
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});
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}
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},
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addoneandhalfScore: function() {
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if (this.data.currentStudent) {
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this.updateStudentScore(1.5);
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} else {
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wx.showToast({
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title: '请先随机点名一个学生',
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icon: 'none',
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duration: 2000
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});
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}
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},
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addtwoScore: function() {
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if (this.data.currentStudent) {
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this.updateStudentScore(2);
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} else {
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wx.showToast({
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title: '请先随机点名一个学生',
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icon: 'none',
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duration: 2000
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});
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}
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},
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addtwoandhalfScore: function() {
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if (this.data.currentStudent) {
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this.updateStudentScore(2.5);
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} else {
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wx.showToast({
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title: '请先随机点名一个学生',
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icon: 'none',
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duration: 2000
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});
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}
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},
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addthreeScore: function() {
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if (this.data.currentStudent) {
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this.updateStudentScore(3);
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} else {
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wx.showToast({
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title: '请先随机点名一个学生',
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icon: 'none',
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duration: 2000
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});
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}
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},
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subtractOneScore: function() {
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if (this.data.currentStudent) {
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this.updateStudentScore(-1);
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} else {
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wx.showToast({
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title: '请先随机点名一个学生',
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icon: 'none',
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duration: 2000
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});
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}
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},
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// 更新选中学生的分数
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updateStudentScore: function(amount) {
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const newScore = parseFloat(this.data.currentStudent.score) + amount;
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const studentId = this.data.currentStudent._id;
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const userCollection = db.collection('users');
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userCollection.doc(studentId).update({
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data: {
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score: newScore
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}
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}).then(res => {
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console.log('分数更新成功');
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wx.showToast({
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title: '分数更新成功',
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icon: 'success',
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duration: 2000
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});
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this.setData({
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currentStudent: {...this.data.currentStudent, score: newScore.toString()}
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});
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}).catch(err => {
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console.error('分数更新失败', err);
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wx.showToast({
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title: '分数更新失败',
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icon: 'none',
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duration: 2000
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});
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});
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},
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applyEffect: function() {
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if (!this.data.currentStudent) {
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wx.showToast({
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title: '请先随机点名一个学生',
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icon: 'none',
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duration: 2000
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});
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return;
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}
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const effect = this.data.effects[Math.floor(Math.random() * this.data.effects.length)];
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this.setData({
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effect: effect
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});
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let newScore;
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switch (effect.type) {
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case 'add':
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newScore = parseFloat(this.data.currentStudent.score) + effect.value;
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break;
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case 'multiply':
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newScore = parseFloat(this.data.currentStudent.score) * effect.value;
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break;
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case 'divide':
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if (this.data.currentStudent.score === 0) {
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wx.showToast({
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title: '分数不能为0',
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icon: 'none',
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duration: 2000
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});
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return;
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}
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newScore = parseFloat(this.data.currentStudent.score) * effect.value;
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break;
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default:
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newScore = this.data.currentStudent.score;
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}
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const studentId = this.data.currentStudent._id;
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const userCollection = db.collection('users');
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userCollection.doc(studentId).update({
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data: {
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score: newScore
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}
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}).then(res => {
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console.log('分数更新成功');
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wx.showToast({
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title: `应用效果：${effect.name}`,
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icon: 'success',
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duration: 2000
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});
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this.setData({
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currentStudent: {...this.data.currentStudent, score: newScore.toString()}
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});
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}).catch(err => {
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console.error('分数更新失败', err);
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wx.showToast({
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title: '分数更新失败',
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icon: 'none',
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duration: 2000
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});
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});
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},
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//刷新
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refreshData: function() {
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this.loadStudents1();
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},
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// 加载学生数据
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loadStudents1: function() {
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const studentsCollection = db.collection('users');
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studentsCollection.get({
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success: res => {
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if (res.data.length === 0) {
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wx.showToast({
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title: '没有学生数据',
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icon: 'none',
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duration: 2000
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});
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return;
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}
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this.setData({
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students: res.data,
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currentStudent: null,
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effect: null
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});
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},
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fail: err => {
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console.error('学生数据加载失败：', err);
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}
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});
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},
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goBack: function() {
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wx.navigateTo({
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url: '/pages/teacherHomePage/teacherHomePage'
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});
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}
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}); |