LibraryBorrowingSystem/index.js

const app = getApp();

Page({
  data: {
    totalBooks: 0,
    availableBooks: 0,
    myBorrowCount: 0,
    hotBooks: []
  },

  onLoad() {
    this.loadData();
  },

  onShow() {
    this.loadData();
  },

  loadData() {
    const books = app.globalData.books;
    const borrowRecords = app.globalData.borrowRecords;
    
    // 计算统计数据
    const totalBooks = books.reduce((sum, book) => sum + book.total, 0);
    const availableBooks = books.reduce((sum, book) => sum + book.available, 0);
    const myBorrowCount = borrowRecords.filter(record => !record.returnDate).length;
    
    // 获取热门图书（按可借数量排序）
    const hotBooks = [...books]
      .sort((a, b) => b.available - a.available)
      .slice(0, 3);

    this.setData({
      totalBooks,
      availableBooks,
      myBorrowCount,
      hotBooks
    });
  },

  goToBookDetail(e) {
    const bookId = e.currentTarget.dataset.id;
    wx.navigateTo({
      url: `/pages/books/detail/detail?id=${bookId}`
    });
  }
});