小程序接入支付功能

server/store-jsonl.js

@@ -0,0 +1,154 @@
+// JSONL 后端：一行一条 JSON 追加写（改状态就追加新行），启动时读一遍建索引
+// 量小、单进程够用；也是没配数据库时的默认后端，自测和回滚都靠它
+const fs = require('fs')
+const path = require('path')
+const { newActivationCode: randomCode } = require('./code.js')
+
+const DATA_DIR = process.env.DATA_DIR || path.join(__dirname, 'data')
+const FILE = path.join(DATA_DIR, 'orders.jsonl')
+const USERS_FILE = path.join(DATA_DIR, 'users.jsonl')
+const SETTINGS_FILE = path.join(DATA_DIR, 'settings.json')
+
+const orders = new Map() // outTradeNo -> 最新一条记录
+const usedCodes = new Set()
+const users = new Map() // openid -> 记录
+const persistedSeen = new Map() // openid -> 最近一次落盘的活跃时间
+
+function newActivationCode() {
+  for (;;) {
+    const code = randomCode()
+    if (!usedCodes.has(code)) return code
+  }
+}
+
+function load() {
+  orders.clear()
+  usedCodes.clear()
+  users.clear()
+  persistedSeen.clear()
+  if (fs.existsSync(FILE)) {
+    fs.readFileSync(FILE, 'utf8')
+      .split('\n')
+      .forEach((line) => {
+        if (!line.trim()) return
+        const record = JSON.parse(line)
+        orders.set(record.outTradeNo, record) // 同一单号，后写的覆盖先写的
+        if (record.code) usedCodes.add(record.code)
+      })
+  }
+  if (fs.existsSync(USERS_FILE)) {
+    fs.readFileSync(USERS_FILE, 'utf8')
+      .split('\n')
+      .forEach((line) => {
+        if (!line.trim()) return
+        const record = JSON.parse(line)
+        users.set(record.openid, record)
+        persistedSeen.set(record.openid, record.lastSeenAt)
+      })
+  }
+}
+
+load()
+
+module.exports = {
+  backend: 'jsonl',
+  file: FILE,
+  ready: async () => {},
+  get: async (outTradeNo) => orders.get(outTradeNo) || null,
+
+  // 全量落一条（新建、改状态、迁移导入都走它）
+  saveOrder: async (record) => {
+    fs.mkdirSync(DATA_DIR, { recursive: true })
+    fs.appendFileSync(FILE, JSON.stringify(record) + '\n')
+    orders.set(record.outTradeNo, record)
+    if (record.code) usedCodes.add(record.code)
+    return record
+  },
+
+  // 发货：生成激活码并绑定；已经有码就直接返回（幂等）
+  assignCode: async (outTradeNo, extra) => {
+    const record = orders.get(outTradeNo)
+    if (!record) throw new Error('没有这笔业务单号：' + outTradeNo)
+    if (record.code) return record
+    return module.exports.saveOrder(
+      Object.assign(
+        {},
+        record,
+        { status: 'delivered', code: newActivationCode(), deliveredAt: Date.now(), notified: false },
+        extra
+      )
+    )
+  },
+
+  markNotified: async (outTradeNo) => {
+    const record = orders.get(outTradeNo)
+    if (!record) return
+    await module.exports.saveOrder(Object.assign({}, record, { notified: true }))
+  },
+
+  markRefunded: async (outTradeNo, refundOrderId) => {
+    const record = orders.get(outTradeNo)
+    if (!record) return
+    await module.exports.saveOrder(Object.assign({}, record, { refunded: true, refundOrderId, refundedAt: Date.now() }))
+  },
+
+  listByOpenid: async (openid) =>
+    Array.from(orders.values())
+      .filter((o) => o.openid === openid && o.code && !o.refunded)
+      .sort((a, b) => b.deliveredAt - a.deliveredAt),
+
+  listPendingByOpenid: async (openid) =>
+    Array.from(orders.values())
+      .filter((o) => o.openid === openid && !o.refunded && (!o.code || !o.notified))
+      .sort((a, b) => b.createdAt - a.createdAt),
+
+  listPendingAll: async (since) =>
+    Array.from(orders.values())
+      .filter((o) => !o.refunded && (!o.code || !o.notified) && o.createdAt >= since)
+      .sort((a, b) => a.createdAt - b.createdAt),
+
+  listGoods: async () => [],
+
+  getUser: async (openid) => {
+    const record = users.get(openid)
+    return record ? { openid, createdAt: record.createdAt, lastSeenAt: record.lastSeenAt, isAdmin: Boolean(record.isAdmin) } : null
+  },
+
+  // 文件后端：想改文案就在 data/settings.json 里写 {"buy.title": "xx"}
+  getSettings: async () => {
+    if (!fs.existsSync(SETTINGS_FILE)) return {}
+    try {
+      return JSON.parse(fs.readFileSync(SETTINGS_FILE, 'utf8'))
+    } catch (err) {
+      console.error('settings.json 解析失败：', err.message)
+      return {}
+    }
+  },
+
+  touchUser: async (openid, firstSeenAt) => {
+    const now = Date.now()
+    const existed = users.get(openid)
+    const record = {
+      openid,
+      createdAt: existed ? existed.createdAt : firstSeenAt || now,
+      lastSeenAt: now,
+      isAdmin: existed ? existed.isAdmin : false,
+    }
+    users.set(openid, record)
+    // 活跃时间最多每小时落一次盘，免得文件被刷爆
+    if (!persistedSeen.has(openid) || now - persistedSeen.get(openid) > 3600000) {
+      fs.mkdirSync(DATA_DIR, { recursive: true })
+      fs.appendFileSync(USERS_FILE, JSON.stringify(record) + '\n')
+      persistedSeen.set(openid, now)
+    }
+    return record
+  },
+
+  // 核对用：订单数、激活码数、未完成的单
+  stats: async () => ({
+    orders: orders.size,
+    codes: Array.from(orders.values()).filter((o) => o.code).length,
+    pending: Array.from(orders.values()).filter((o) => !o.refunded && (!o.code || !o.notified)).length,
+    users: users.size,
+  }),
+}