soul-yongping/miniprogram/pages/gift-pay/detail.js

/**
 * Soul创业派对 - 代付详情页
 * 好友打开后看到订单信息，点击「帮他付款」完成代付
 */
const app = getApp()

Page({
  data: {
    statusBarHeight: 44,
    requestSn: '',
    detail: null,
    loading: true,
    paying: false,
    isInitiator: false,
    requesterMsg: '',
    amountDisplay: '0.00' // 预格式化金额，WXML 中 toFixed 可能不生效
  },

  onLoad(options) {
    this.setData({ statusBarHeight: app.globalData.statusBarHeight || 44 })
    const requestSn = (options.requestSn || '').trim()
    if (!requestSn) {
      wx.showToast({ title: '代付链接无效', icon: 'none' })
      setTimeout(() => wx.switchTab({ url: '/pages/index/index' }), 1500)
      return
    }
    this.setData({ requestSn })
    this.loadDetail()
  },

  async loadDetail() {
    const { requestSn } = this.data
    if (!requestSn) return
    this.setData({ loading: true })
    try {
      const res = await app.request(`/api/miniprogram/gift-pay/detail?requestSn=${encodeURIComponent(requestSn)}`)
      if (res && res.success) {
        const myId = app.globalData.userInfo?.id || ''
        const isInitiator = !!myId && res.initiatorUserId === myId
        const requesterMsg = isInitiator
          ? '分享给好友，好友打开后即可为你完成支付。'
          : (res.initiatorMsg || `" 请帮我代付「${res.sectionTitle || res.description || '该商品'}」，非常感谢！ "`)
        const amountDisplay = (res.amount != null && res.amount !== '')
          ? Number(res.amount).toFixed(2)
          : '0.00'
        this.setData({ detail: res, loading: false, isInitiator, requesterMsg, amountDisplay })
      } else {
        this.setData({ loading: false })
        wx.showToast({ title: res?.error || '加载失败', icon: 'none' })
      }
    } catch (e) {
      this.setData({ loading: false })
      wx.showToast({ title: '加载失败', icon: 'none' })
    }
  },

  async doPay() {
    // 优先尝试静默获取 openId（有会话时可直接发起支付）
    let openId = app.globalData.openId || wx.getStorageSync('openId')
    if (!openId) {
      wx.showLoading({ title: '获取支付凭证...', mask: true })
      openId = await app.getOpenId()
      wx.hideLoading()
    }
    if (!openId) {
      const { confirm } = await new Promise(r => {
        wx.showModal({
          title: '请先登录',
          content: '登录后可帮他完成代付',
          confirmText: '去登录',
          cancelText: '取消',
          success: res => r(res)
        })
      })
      if (confirm) wx.switchTab({ url: '/pages/my/my' })
      return
    }
    const { requestSn, detail } = this.data
    if (!requestSn || !detail) return

    this.setData({ paying: true })
    wx.showLoading({ title: '创建订单中...', mask: true })
    try {
      const res = await app.request({
        url: '/api/miniprogram/gift-pay/pay',
        method: 'POST',
        data: {
          requestSn,
          openId,
          userId: app.globalData.userInfo?.id || ''
        }
      })
      wx.hideLoading()
      if (!res || !res.success || !res.data?.payParams) {
        throw new Error(res?.error || '创建订单失败')
      }
      const payParams = res.data.payParams
      payParams._orderSn = res.data.orderSn

      await new Promise((resolve, reject) => {
        wx.requestPayment({
          ...payParams,
          signType: payParams.signType || 'MD5',
          success: resolve,
          fail: reject
        })
      })

      wx.showToast({ title: '代付成功', icon: 'success' })
      this.setData({ paying: false })
      setTimeout(() => {
        wx.navigateBack({ fail: () => wx.switchTab({ url: '/pages/index/index' }) })
      }, 1500)
    } catch (e) {
      this.setData({ paying: false })
      if (e.errMsg && e.errMsg.includes('cancel')) {
        wx.showToast({ title: '已取消支付', icon: 'none' })
      } else {
        const errMsg = e.message || e.error || '支付失败'
        const isPrepayError = /prepay_id|创建订单|支付请求/i.test(errMsg)
        if (isPrepayError) {
          const { confirm } = await new Promise(r => {
            wx.showModal({
              title: '订单创建失败',
              content: errMsg + '\n\n是否重新创建订单并重试？',
              confirmText: '重新创建订单',
              cancelText: '取消',
              success: res => r(res)
            })
          })
          if (confirm) this.doPay()
        } else {
          wx.showToast({ title: errMsg, icon: 'none' })
        }
      }
    }
  },

  goBack() {
    app.goBackOrToHome()
  },

  goToInitiatorProfile() {
    const { detail } = this.data
    if (!detail?.initiatorUserId) return
    wx.navigateTo({ url: `/pages/member-detail/member-detail?id=${detail.initiatorUserId}` })
  },

  goToArticle() {
    const { detail } = this.data
    if (!detail || detail.productType !== 'section' || !detail.productId) return
    const mid = detail.productMid || app.getSectionMid?.(detail.productId)
    const q = mid ? `mid=${mid}` : `id=${detail.productId}`
    wx.navigateTo({ url: `/pages/read/read?${q}` })
  },

  onShareAppMessage() {
    const { requestSn } = this.data
    return {
      title: '好友请你帮忙代付 - Soul创业派对',
      path: requestSn ? `/pages/gift-pay/detail?requestSn=${requestSn}` : '/pages/gift-pay/detail'
    }
  }
})