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utils/learningTracker.js

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+/**
+ * 学习时长追踪服务
+ * 自动记录用户在各页面的学习时长
+ */
+
+class LearningTimeTracker {
+  constructor() {
+    this.currentPage = null;
+    this.startTime = null;
+    this.sessionData = {};
+  }
+
+  /**
+   * 开始追踪页面
+   * @param {String} pageName - 页面名称
+   */
+  startTracking(pageName) {
+    // 如果之前有页面在追踪，先结束它
+    if (this.currentPage && this.startTime) {
+      this.endTracking();
+    }
+
+    this.currentPage = pageName;
+    this.startTime = Date.now();
+    
+    console.log(`[学习追踪] 开始: ${pageName}`);
+  }
+
+  /**
+   * 结束追踪
+   */
+  endTracking() {
+    if (!this.currentPage || !this.startTime) {
+      return;
+    }
+
+    const endTime = Date.now();
+    const duration = Math.floor((endTime - this.startTime) / 1000); // 秒
+    
+    // 只记录超过5秒的有效学习时长（过滤快速切换）
+    if (duration >= 5) {
+      this.recordDuration(this.currentPage, duration);
+      console.log(`[学习追踪] 结束: ${this.currentPage}, 时长: ${duration}秒`);
+    }
+
+    this.currentPage = null;
+    this.startTime = null;
+  }
+
+  /**
+   * 记录学习时长
+   * @param {String} pageName - 页面名称
+   * @param {Number} duration - 时长（秒）
+   */
+  recordDuration(pageName, duration) {
+    const today = this.getTodayString();
+    const now = new Date();
+
+    // 1. 更新总学习数据
+    const learningData = wx.getStorageSync('learning_data') || {
+      totalHours: 0,
+      totalSeconds: 0,
+      dailyRecords: []
+    };
+
+    learningData.totalSeconds = (learningData.totalSeconds || 0) + duration;
+    learningData.totalHours = parseFloat((learningData.totalSeconds / 3600).toFixed(1));
+
+    // 更新每日记录
+    let todayRecord = learningData.dailyRecords.find(r => r.date === today);
+    if (!todayRecord) {
+      todayRecord = {
+        date: today,
+        seconds: 0,
+        hours: 0,
+        sessions: []
+      };
+      learningData.dailyRecords.push(todayRecord);
+    }
+
+    todayRecord.seconds += duration;
+    todayRecord.hours = parseFloat((todayRecord.seconds / 3600).toFixed(2));
+    todayRecord.sessions.push({
+      page: pageName,
+      duration: duration,
+      timestamp: now.getTime()
+    });
+
+    // 只保留最近365天的记录
+    if (learningData.dailyRecords.length > 365) {
+      learningData.dailyRecords = learningData.dailyRecords
+        .sort((a, b) => new Date(b.date) - new Date(a.date))
+        .slice(0, 365);
+    }
+
+    wx.setStorageSync('learning_data', learningData);
+
+    // 2. 更新每日活跃度（用于热力图）
+    const dailyActivity = wx.getStorageSync('daily_activity') || {};
+    dailyActivity[today] = (dailyActivity[today] || 0) + Math.floor(duration / 60); // 转为分钟
+    wx.setStorageSync('daily_activity', dailyActivity);
+
+    // 3. 更新模块使用时长
+    const moduleMapping = {
+      'courses': 'course',
+      'course-detail': 'course',
+      'forum': 'forum',
+      'forum-detail': 'forum',
+      'post': 'forum',
+      'gpa': 'tools',
+      'schedule': 'tools',
+      'countdown': 'tools',
+      'tools': 'tools',
+      'ai-assistant': 'ai',
+      'dashboard': 'tools'
+    };
+
+    const module = moduleMapping[pageName] || 'other';
+    const moduleUsage = wx.getStorageSync('module_usage') || {
+      course: 0,
+      forum: 0,
+      tools: 0,
+      ai: 0
+    };
+
+    moduleUsage[module] = (moduleUsage[module] || 0) + parseFloat((duration / 3600).toFixed(2));
+    wx.setStorageSync('module_usage', moduleUsage);
+
+    // 4. 更新学习画像
+    this.updateLearningProfile(pageName, duration);
+  }
+
+  /**
+   * 更新学习画像
+   */
+  updateLearningProfile(pageName, duration) {
+    const profile = wx.getStorageSync('learning_profile') || {
+      focus: 0,        // 专注度
+      activity: 0,     // 活跃度
+      duration: 0,     // 学习时长
+      breadth: 0,      // 知识广度
+      interaction: 0,  // 互动性
+      persistence: 0   // 坚持度
+    };
+
+    // 专注度：基于单次学习时长（超过30分钟+10，超过1小时+20）
+    if (duration >= 3600) {
+      profile.focus = Math.min(100, profile.focus + 2);
+    } else if (duration >= 1800) {
+      profile.focus = Math.min(100, profile.focus + 1);
+    }
+
+    // 活跃度：每次学习+1
+    profile.activity = Math.min(100, profile.activity + 0.5);
+
+    // 学习时长：每小时+5
+    profile.duration = Math.min(100, profile.duration + (duration / 3600) * 5);
+
+    // 知识广度：访问课程相关页面+1
+    if (pageName.includes('course')) {
+      profile.breadth = Math.min(100, profile.breadth + 0.3);
+    }
+
+    // 互动性：论坛相关+2
+    if (pageName.includes('forum') || pageName.includes('post')) {
+      profile.interaction = Math.min(100, profile.interaction + 1);
+    }
+
+    // 坚持度：每天学习+3
+    const learningData = wx.getStorageSync('learning_data') || {};
+    const continuousDays = this.calculateContinuousDays(learningData.dailyRecords || []);
+    profile.persistence = Math.min(100, continuousDays * 3);
+
+    wx.setStorageSync('learning_profile', profile);
+  }
+
+  /**
+   * 计算连续学习天数
+   */
+  calculateContinuousDays(records) {
+    if (!records || records.length === 0) return 0;
+
+    const sortedRecords = records.sort((a, b) => new Date(b.date) - new Date(a.date));
+    let continuousDays = 0;
+    const today = new Date();
+    today.setHours(0, 0, 0, 0);
+
+    for (let i = 0; i < sortedRecords.length; i++) {
+      const recordDate = new Date(sortedRecords[i].date);
+      recordDate.setHours(0, 0, 0, 0);
+      const daysDiff = Math.floor((today - recordDate) / (1000 * 60 * 60 * 24));
+
+      if (daysDiff === i) {
+        continuousDays++;
+      } else {
+        break;
+      }
+    }
+
+    return continuousDays;
+  }
+
+  /**
+   * 获取今天的日期字符串
+   */
+  getTodayString() {
+    const now = new Date();
+    const year = now.getFullYear();
+    const month = String(now.getMonth() + 1).padStart(2, '0');
+    const day = String(now.getDate()).padStart(2, '0');
+    return `${year}-${month}-${day}`;
+  }
+
+  /**
+   * 获取学习统计
+   */
+  getStats() {
+    const learningData = wx.getStorageSync('learning_data') || {
+      totalHours: 0,
+      totalSeconds: 0,
+      dailyRecords: []
+    };
+
+    const continuousDays = this.calculateContinuousDays(learningData.dailyRecords);
+
+    return {
+      totalHours: learningData.totalHours || 0,
+      totalSeconds: learningData.totalSeconds || 0,
+      continuousDays: continuousDays,
+      todayHours: this.getTodayHours()
+    };
+  }
+
+  /**
+   * 获取今天的学习时长
+   */
+  getTodayHours() {
+    const today = this.getTodayString();
+    const learningData = wx.getStorageSync('learning_data') || { dailyRecords: [] };
+    const todayRecord = learningData.dailyRecords.find(r => r.date === today);
+    return todayRecord ? todayRecord.hours : 0;
+  }
+}
+
+// 创建全局实例
+const tracker = new LearningTimeTracker();
+
+module.exports = {
+  tracker,
+  
+  /**
+   * 页面onShow时调用
+   */
+  onPageShow(pageName) {
+    tracker.startTracking(pageName);
+  },
+
+  /**
+   * 页面onHide时调用
+   */
+  onPageHide() {
+    tracker.endTracking();
+  },
+
+  /**
+   * 页面onUnload时调用
+   */
+  onPageUnload() {
+    tracker.endTracking();
+  },
+
+  /**
+   * 获取统计数据
+   */
+  getStats() {
+    return tracker.getStats();
+  }
+};