init: 微信支付 Native 页面 (Express + JSON 存储)

utils/storage.js

@@ -0,0 +1,47 @@
+const fs = require('fs');
+const path = require('path');
+
+const DATA_FILE = path.join(__dirname, '..', 'data', 'orders.json');
+
+function readOrders() {
+  try {
+    const raw = fs.readFileSync(DATA_FILE, 'utf-8');
+    return JSON.parse(raw);
+  } catch {
+    return [];
+  }
+}
+
+function writeOrders(orders) {
+  fs.writeFileSync(DATA_FILE, JSON.stringify(orders, null, 2), 'utf-8');
+}
+
+function findOrder(orderId) {
+  const orders = readOrders();
+  return orders.find(o => o.orderId === orderId) || null;
+}
+
+function saveOrder(order) {
+  const orders = readOrders();
+  const idx = orders.findIndex(o => o.orderId === order.orderId);
+  if (idx !== -1) {
+    orders[idx] = order;
+  } else {
+    orders.push(order);
+  }
+  writeOrders(orders);
+}
+
+function updateOrderStatus(orderId, status, transactionId) {
+  const orders = readOrders();
+  const order = orders.find(o => o.orderId === orderId);
+  if (order) {
+    order.status = status;
+    if (transactionId) order.transactionId = transactionId;
+    order.updatedAt = new Date().toISOString();
+    writeOrders(orders);
+  }
+  return order;
+}
+
+module.exports = { readOrders, findOrder, saveOrder, updateOrderStatus };