wx-teacher/subpackages/purchasehistory/purchasehistory.js

import { models, db, _ } from '../../utils/cloudbase.js'
Page({
  data: {
    role: "teacher",
    historyList: [],
    isManaging: false,
    xiazi: '',
    pageNumber: 1,
    pageSize: 10,
    hasMore: true, // 是否还有更多数据
    isLoading: false, // 防止多次触发
  },

  onLoad(options) {
    // 列表数据
    this.setData({
      pageNumber: 1,
      hasMore: true,
      historyList: []
    }, () => {
      this.getcollect();
    });
    // 页面加载时的初始化操作
    const fileIDs = [
      'cloud://honghgaier-5guiffgcf17a2eea.686f-honghgaier-5guiffgcf17a2eea-1373037829/images/icon/xiazi.png',
    ];
    
    // 并发下载多个 fileID
    Promise.all(
      fileIDs.map(fileID => wx.cloud.downloadFile({ fileID }))
    ).then(results => {
      // 每个 result 对应一个下载结果
      const tempFilePaths = results.map(r => r.tempFilePath);
      console.log('全部下载成功:', tempFilePaths);

      this.setData({
        xiazi: tempFilePaths[0],
      });
    }).catch(err => {
      console.error('有文件下载失败:', err);
    });
  },

  onReachBottom() {
    // 上拉触底事件的处理函数
    this.loadMore();
  },

  loadMore() {
    // 加载更多数据的逻辑
    console.log('加载更多');
    // this.getcollect(true);
    if (this.data.isLoading || !this.data.hasMore) return;
    this.setData({ isLoading: true });
    this.getcollect(true);

  },

  // 收藏列表
  async getcollect(isLoadMore = false) {

    if (this.data.isLoading || !this.data.hasMore) return;
  
    this.setData({ isLoading: true });
  
    const userInfo = wx.getStorageSync('userInfo');
    const { pageNumber, pageSize } = this.data;
  
    try {
      const { data } = await models.download_history.list({
        filter: {
          where: {
            wx_user_id: userInfo._id
          }
        },
        pageSize,
        pageNumber,
        getCount: true,
        envType: "prod",
      });
  
      const collectList = data.records || [];
      if (collectList.length === 0) {
        this.setData({ hasMore: false, isLoading: false });
        return;
      }

      console.log(collectList, 'collectList');
  
      const fileManagerIds = collectList.map(item => item.file_manage_id);

      console.log(fileManagerIds, 'fileManagerIds');
      // 第二步：循环获取每个文件数据（单条查询）
      const fileDetailPromises = fileManagerIds.map(id => {
        return models.file_manage.list({
          filter: {
            where: {
              _id: id
            }
          },
          envType: "prod"
        }).then(res => {
          const record = res.data?.records?.[0];
          if (!record) {
            console.warn(`未找到 _id 为 ${id} 的文件`);
          }
          return record || null;
        })
        .catch(err => {
          console.error(`获取文件 ${id} 失败`, err);
          return null;
        });
      });

      // 第三步：等待所有请求完成
      const fileDetails = await Promise.all(fileDetailPromises);
      console.log(fileDetails, 'fileDetails');

      // 第四步：过滤无效项，并添加 checked 字段
      const newFiles = fileDetails
        .filter(Boolean) // 去掉 null 或 undefined
        .map((file, index) => {
          const historyRecord = collectList[index]; // 获取原 download_history 的记录
          if (!file) return null;
          return {
            ...file,
            checked: false,
            download_history_id: historyRecord._id,  // 关键：存 download_history 的 id
            createdAt: this.formatTime(file.createdAt) // 这里格式化
          };
        });


      this.setData({
        historyList: isLoadMore ? this.data.historyList.concat(newFiles) : newFiles,
        pageNumber: pageNumber + 1,
        hasMore: collectList.length === pageSize, // 如果返回的数量小于 pageSize，说明已经到底
        isLoading: false
      });
  
    } catch (err) {
      console.error('获取收藏文件失败:', err);
      this.setData({ isLoading: false });
    }
  },

  // 格式化时间函数
  formatTime(ts) {
    const date = new Date(ts);
    const y = date.getFullYear();
    const m = String(date.getMonth() + 1).padStart(2, '0');
    const d = String(date.getDate()).padStart(2, '0');
    const hh = String(date.getHours()).padStart(2, '0');
    const mm = String(date.getMinutes()).padStart(2, '0');
    const ss = String(date.getSeconds()).padStart(2, '0');
    return `${y}-${m}-${d} ${hh}:${mm}:${ss}`;
  },

  // 收藏管理是否编辑 
  toggleManageMode() {
    const { isManaging, historyList } = this.data;
    if (isManaging) {
      if (historyList && historyList.length > 0) {
        historyList.forEach(item => item.checked = false);
      }
      this.setData({ isManaging: false });
    } else {
      this.setData({ isManaging: true });
    }
  },

  // 全选按钮
  selectAll() {
    const { historyList } = this.data;
    if (!historyList || historyList.length === 0) return;
  
    const allChecked = historyList.every(item => item.checked);
    const updatedList = historyList.map(item => ({
      ...item,
      checked: !allChecked
    }));
  
    this.setData({ historyList: updatedList });
  },
  // 单选
  onCheckboxGroupChange(e) {
    const selectedIds = e.detail.value;
    const updatedList = this.data.historyList.map(item => ({
      ...item,
      checked: selectedIds.includes(item.download_history_id),
    }));
    this.setData({ historyList: updatedList });
  },

  // 删除
  async deleteItems() {
    const { historyList } = this.data;
    const selectedItems = historyList.filter(item => item.checked);
    const fileids = selectedItems.map(item => item.download_history_id);
    const userInfo = wx.getStorageSync('userInfo')

    if (fileids.length === 0) {
      wx.showToast({ title: '请先选择要删除的数据', icon: 'none' });
      return;
    }

    console.log(userInfo._id, 'userInfo._id');
    const { data } = await models.download_history.deleteMany({
      filter: {
        where: {
          where: {
            user_id: _.eq(userInfo._id)
          }
        }
      },
      // envType: pre 体验环境， prod 正式环境
      envType: "prod",
    });
    
    // 更新页面数据
    const updatedList = historyList.filter(item => !fileids.includes(item.download_history_id));

    this.setData({
      historyList: updatedList,
      isManaging: false
    }, () => {
       // 回调中触发插入逻辑
       this.insertNewItems();
    });
  },

  async insertNewItems() {
    try {
      const userInfo = wx.getStorageSync('userInfo');
  
      const { historyList } = this.data;

      if (!historyList.length) {
        // wx.showToast({ title: '没有收藏的记录数据', icon: 'none' });
        return;
      }

      const newItems = historyList.map(item => ({
        file_manage_id: item._id,
        user_id: userInfo._id
      }));

      const { data } = await models.download_history.createMany({
        data: newItems,
        envType: 'prod'
      });

      console.log('插入成功:', data);
    } catch (err) {
      console.error('插入失败:', err);
      wx.showToast({ title: '插入失败', icon: 'none' });
    }
  } 
});