school-miniprogram/src/utils/page.ts

const originalPage = Page

const noSharePath: string[] = []

function page(config: WechatMiniprogram.Page.Instance<WechatMiniprogram.IAnyObject, WechatMiniprogram.IAnyObject>) {
  const originalOnLoad = config.onLoad
  config.onLoad = function (options) {
    setImageParams(this)
    setNavBar(this)

    if (originalOnLoad) {
      originalOnLoad.call(this, options)
    }
  }

  const originalOnPageScroll = config.onPageScroll
  config.onPageScroll = function (options): void {
    const scrollTop = options?.scrollTop
    let background = 'transparent'
    if (Number(scrollTop) > 20) {
      background = '#ffffff'
    }
    this.setData({
      background,
    })
    if (originalOnPageScroll) {
      originalOnPageScroll.call(this, options)
    }
  }

  const originalOnShareAppMessage = config.onShareAppMessage
  config.onShareAppMessage = function (options) {
    if (originalOnShareAppMessage) {
      return originalOnShareAppMessage.call(this, options)
    } else {
      const date = new Date()
      const Timestamp = date.getTime()

      const pages = getCurrentPages()
      const currentPage = pages[pages.length - 1]
      let url = currentPage.route
      const opts = currentPage.options
      let urlWithArgs = `${url}?`
      for (const key in opts) {
        const value = opts[key]
        urlWithArgs += `${key}=${value}&`
      }
      urlWithArgs = urlWithArgs.substring(0, urlWithArgs.length - 1)

      const isNoShare = noSharePath.some((path) => url.includes(path))

      let imageUrl = ''
      if (isNoShare) {
        urlWithArgs = 'pages/start/index'
        imageUrl = `${getApp().globalData.imageUrl}share.png?t=${Timestamp}`
      }

      return {
        title: '校园小程序',
        path: urlWithArgs,
        imageUrl,
      }
    }
  }

  return originalPage(config)
}

function setImageParams(
  currPage: WechatMiniprogram.Page.Instance<WechatMiniprogram.IAnyObject, WechatMiniprogram.IAnyObject>,
) {
  const date = new Date()
  const Timestamp = date.getTime()
  currPage.setData({
    imageUrl: getApp().globalData.imageUrl,
    Timestamp,
  })
}

function setNavBar(
  currPage: WechatMiniprogram.Page.Instance<WechatMiniprogram.IAnyObject, WechatMiniprogram.IAnyObject>,
) {
  currPage.setData({
    background: 'transparent',
    pageTop: wx.getMenuButtonBoundingClientRect().bottom,
  })
}

export default page