Ai config

utils/pagination.js

@@ -0,0 +1,20 @@
+async function paginate(queryFn, sql, params, page = 1, pageSize = 20) {
+  const p = Math.max(1, parseInt(page) || 1)
+  const ps = Math.min(100, Math.max(1, parseInt(pageSize) || 20))
+
+  const countResult = await queryFn(
+    `SELECT COUNT(*) as total FROM (${sql}) AS _paged`,
+    params
+  )
+  const total = countResult[0].total
+  const totalPages = Math.ceil(total / ps)
+
+  const data = await queryFn(
+    `${sql} LIMIT ? OFFSET ?`,
+    [...params, ps, (p - 1) * ps]
+  )
+
+  return { data, total, page: p, pageSize: ps, totalPages }
+}
+
+module.exports = { paginate }

utils/wechat.js

@@ -0,0 +1,87 @@
+const fetch = require('node-fetch')
+
+const APPID = process.env.WECHAT_APPID
+const SECRET = process.env.WECHAT_SECRET
+
+let accessToken = null
+let tokenExpiresAt = 0
+
+async function getAccessToken() {
+  if (!APPID || !SECRET) {
+    throw new Error('WECHAT_APPID and WECHAT_SECRET must be configured in .env')
+  }
+
+  if (accessToken && Date.now() < tokenExpiresAt) {
+    return accessToken
+  }
+
+  const res = await fetch(
+    `https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=${APPID}&secret=${SECRET}`
+  )
+  const data = await res.json()
+
+  if (data.errcode) {
+    throw new Error(`微信API错误: ${data.errmsg}`)
+  }
+
+  accessToken = data.access_token
+  tokenExpiresAt = Date.now() + (data.expires_in - 300) * 1000
+  return accessToken
+}
+
+async function sendSubscribeMessage(openid, templateId, data, page = '') {
+  const token = await getAccessToken()
+
+  const body = {
+    touser: openid,
+    template_id: templateId,
+    page,
+    data,
+    miniprogram_state: 'formal'
+  }
+
+  const res = await fetch(
+    `https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token=${token}`,
+    {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(body)
+    }
+  )
+  const result = await res.json()
+
+  if (result.errcode && result.errcode !== 0) {
+    console.error('发送订阅消息失败:', result)
+    return { success: false, error: result.errmsg }
+  }
+
+  return { success: true }
+}
+
+async function sendOrderStatusNotification(openid, orderId, status, totalPrice) {
+  const statusText = {
+    paid: '已付款',
+    completed: '已完成',
+    cancelled: '已取消'
+  }
+
+  const templateId = process.env.WECHAT_ORDER_TEMPLATE_ID
+  if (!templateId) {
+    console.warn('WECHAT_ORDER_TEMPLATE_ID not configured, skipping notification')
+    return { success: false, error: 'template not configured' }
+  }
+
+  return sendSubscribeMessage(openid, templateId, {
+    thing1: { value: `订单 ${orderId}` },
+    phrase2: { value: statusText[status] || status },
+    amount3: { value: `¥${totalPrice}` },
+    date4: { value: new Date().toLocaleString('zh-CN') },
+    thing5: { value: '点击查看订单详情' }
+  }, `/pages/customer/order-detail/order-detail?id=${orderId}`)
+}
+
+module.exports = {
+  getAccessToken,
+  sendSubscribeMessage,
+  sendOrderStatusNotification
+}