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pages/gpa/gpa.js

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+// pages/gpa/gpa.js
+const { calculateGPA, showSuccess, showError } = require('../../utils/util.js')
+const learningTracker = require('../../utils/learningTracker.js')
+
+Page({
+  data: {
+    courses: [],
+    courseName: '',
+    courseScore: '',
+    courseCredit: '',
+    totalGPA: 0,
+    totalCredits: 0
+  },
+
+  onLoad() {
+    this.loadCourses()
+  },
+
+  onShow() {
+    // 开始跟踪学习时间
+    learningTracker.onPageShow('tools')
+  },
+
+  onHide() {
+    // 停止跟踪学习时间
+    learningTracker.onPageHide()
+  },
+
+  onUnload() {
+    // 记录学习时长
+    learningTracker.onPageUnload()
+  },
+
+  // 加载已保存的课程
+  loadCourses() {
+    const courses = wx.getStorageSync('gpaCourses') || []
+    this.setData({ courses })
+    this.calculateTotal()
+  },
+
+  // 课程名称输入
+  onNameInput(e) {
+    this.setData({ courseName: e.detail.value })
+  },
+
+  // 成绩输入
+  onScoreInput(e) {
+    this.setData({ courseScore: e.detail.value })
+  },
+
+  // 学分输入
+  onCreditInput(e) {
+    this.setData({ courseCredit: e.detail.value })
+  },
+
+  // 添加课程
+  onAddCourse() {
+    const { courseName, courseScore, courseCredit, courses } = this.data
+    
+    if (!courseName.trim()) {
+      showError('请输入课程名称')
+      return
+    }
+    
+    const score = parseFloat(courseScore)
+    const credit = parseFloat(courseCredit)
+    
+    if (isNaN(score) || score < 0 || score > 100) {
+      showError('请输入有效的成绩（0-100）')
+      return
+    }
+    
+    if (isNaN(credit) || credit <= 0) {
+      showError('请输入有效的学分')
+      return
+    }
+    
+    const newCourse = {
+      id: Date.now(),
+      name: courseName.trim(),
+      score: score,
+      credit: credit
+    }
+    
+    courses.push(newCourse)
+    wx.setStorageSync('gpaCourses', courses)
+    
+    this.setData({
+      courses,
+      courseName: '',
+      courseScore: '',
+      courseCredit: ''
+    })
+    
+    this.calculateTotal()
+    showSuccess('添加成功')
+  },
+
+  // 删除课程
+  onDeleteCourse(e) {
+    const { id } = e.currentTarget.dataset
+    
+    wx.showModal({
+      title: '确认删除',
+      content: '确定要删除这门课程吗？',
+      success: (res) => {
+        if (res.confirm) {
+          let { courses } = this.data
+          courses = courses.filter(course => course.id !== id)
+          wx.setStorageSync('gpaCourses', courses)
+          
+          this.setData({ courses })
+          this.calculateTotal()
+          showSuccess('删除成功')
+        }
+      }
+    })
+  },
+
+  // 计算总GPA
+  calculateTotal() {
+    const { courses } = this.data
+    const gpa = calculateGPA(courses)
+    const totalCredits = courses.reduce((sum, course) => sum + course.credit, 0)
+    
+    this.setData({
+      totalGPA: gpa,
+      totalCredits: totalCredits
+    })
+  },
+
+  // 清空所有
+  onClearAll() {
+    wx.showModal({
+      title: '确认清空',
+      content: '确定要清空所有课程吗？',
+      success: (res) => {
+        if (res.confirm) {
+          wx.removeStorageSync('gpaCourses')
+          this.setData({
+            courses: [],
+            totalGPA: 0,
+            totalCredits: 0
+          })
+          showSuccess('已清空')
+        }
+      }
+    })
+  }
+})