ADD file via upload

2.0 pages rollcall.js

@@ -0,0 +1,178 @@
+const db = wx.cloud.database();
+const app = getApp();
+
+Page({
+  data: {
+    students: [],
+    selectedStudent: null,
+    score: ''
+  },
+
+  onLoad: function() {
+    this.getStudents();
+  },
+// 获取学生列表
+getStudents: function() {
+  const MAX_LIMIT = 20;
+  db.collection('students').count().then(res => {
+    const total = res.total;
+    const batchTimes = Math.ceil(total / MAX_LIMIT);
+    const tasks = [];
+    for (let i = 0; i < batchTimes; i++) {
+      const promise = db.collection('students').skip(i * MAX_LIMIT).limit(MAX_LIMIT).get();
+      tasks.push(promise);
+    }
+    Promise.all(tasks).then(results => {
+      const students = results.reduce((acc, cur) => {
+        return acc.concat(cur.data);
+      }, []);
+      this.setData({
+        students: students
+      });
+      app.globalData.students = students;
+      console.log('Students retrieved:', students);
+    }).catch(err => {
+      console.error('Failed to get students:', err);
+      wx.showToast({
+        title: '获取学生信息失败',
+        icon: 'none'
+      });
+    });
+  }).catch(err => {
+    console.error('Failed to count students:', err);
+    wx.showToast({
+      title: '获取学生数量失败',
+      icon: 'none'
+    });
+  });
+},
+
+
+ // 随机点名
+randomRollCall: function() {
+  const students = this.data.students;
+  if (students.length === 0) {
+    wx.showToast({
+      title: '没有学生信息',
+      icon: 'none'
+    });
+    return;
+  }
+
+  const totalPoints = students.reduce((sum, student) => sum + Math.max(0, 10 - student.points), 0);
+  let randomPoint = Math.random() * totalPoints;
+  let cumulativePoint = 0;
+
+  let selectedStudent = null;
+  for (const student of students) {
+    cumulativePoint += Math.max(0, 10 - student.points);
+    if (randomPoint <= cumulativePoint) {
+      selectedStudent = student;
+      break;
+    }
+  }
+
+  if (selectedStudent) {
+    this.setData({
+      selectedStudent: selectedStudent
+    });
+    wx.showModal({
+      title: '点名成功',
+      content: `点到的同学是：${selectedStudent.name} (${selectedStudent.id})`,
+      showCancel: false
+    });
+    // 触发双倍积分事件
+    this.triggerDoublePointsEvent(selectedStudent);
+
+    // 更新积分
+    this.updatePoints(1); // 到达课堂积分+1
+  } else {
+    wx.showToast({
+      title: '点名失败',
+      icon: 'none'
+    });
+  }
+},
+
+// 触发双倍积分事件
+triggerDoublePointsEvent: function(student) {
+  const probability = 0.1; // 10%的概率触发双倍积分
+  if (Math.random() < probability) {
+    this.setData({
+      doublePoints: true
+    });
+    wx.showToast({
+      title: '双倍积分！',
+      icon: 'success'
+    });
+  } else {
+    this.setData({
+      doublePoints: false
+    });
+  }
+},
+
+// 输入评分
+inputScore: function(e) {
+  this.setData({
+    additionalScore: parseFloat(e.detail.value)
+  });
+},
+
+// 更新积分
+updatePoints: function() {
+  const student = this.data.selectedStudent;
+  let score = 1; // 到达课堂积分+1
+
+  // 判断是否能准确重复所提问的问题
+  if (this.data.questionRepeatedCorrectly) {
+    score += 0.5;
+  } else {
+    score -= 1;
+  }
+
+  // 如果准确回答问题，输入要加的分数
+  if (this.data.questionRepeatedCorrectly) {
+    score += this.data.additionalScore;
+  }
+  console.log('Updating student points:', student._id, student.points); // 调试
+  // 如果触发双倍积分事件，积分加倍
+  if (this.data.doublePoints) {
+    score *= 2;
+  }
+
+  student.points += score;
+
+  db.collection('students').doc(student._id).update({
+    data: {
+      points: student.points
+    }
+  }).then(() => {
+    console.log('Student points updated successfully'); // 调试
+    this.getStudents();
+    wx.showToast({
+      title: '评分成功',
+      icon: 'success'
+    });
+  }).catch(err => {
+    console.error('Failed to update student points:', err);
+    wx.showToast({
+      title: '评分失败',
+      icon: 'none'
+    });
+  });
+},
+
+// 设置回答问题的情况
+setQuestionRepeatedCorrectlyTrue: function() {
+  this.setData({
+    questionRepeatedCorrectly: true
+  });
+},
+
+setQuestionRepeatedCorrectlyFalse: function() {
+  this.setData({
+    questionRepeatedCorrectly: false
+  });
+}
+});