增加微信支付，商城逻辑，公告

routes/regions.js

@@ -120,40 +120,50 @@ router.get('/zhejiang', async (req, res) => {
  */
 router.get('/provinces', async (req, res) => {
   try {
-    // 递归获取子区域的函数
-    async function getChildrenRecursively(parentCode, level) {
-      const [children] = await getDB().execute(
-        `SELECT code, name as label, level FROM china_regions 
-         WHERE parent_code = ? AND level = ?
-         ORDER BY code`,
-        [parentCode, level]
-      );
-      
-      // 为每个子区域递归获取其子区域
-      for (let child of children) {
-        if (level < 3) { // 最多到区县级别（level 3）
-          child.children = await getChildrenRecursively(child.code, level + 1);
-        }
-      }
-      
-      return children;
-    }
-    
-    // 获取所有省份
-    const [provinces] = await getDB().execute(
-      `SELECT code, name as label, level FROM china_regions 
-       WHERE level = 1
-       ORDER BY code`
+    // 一次性获取所有区域数据（省、市、区县）
+    const [allRegions] = await getDB().execute(
+      `SELECT code, name as label, level, parent_code FROM china_regions 
+       WHERE level <= 3
+       ORDER BY level, code`
     );
     
-    // 为每个省份递归获取城市和区县
-    for (let province of provinces) {
-      province.children = await getChildrenRecursively(province.code, 2);
-    }
+    // 按level分组数据
+    const regionsByLevel = {
+      1: [], // 省份
+      2: [], // 城市
+      3: []  // 区县
+    };
     
+    // 创建code到region的映射，便于快速查找
+    const regionMap = {};
+    
+    // 分组并建立映射
+    allRegions.forEach(region => {
+      region.children = []; // 初始化children数组
+      regionsByLevel[region.level].push(region);
+      regionMap[region.code] = region;
+    });
+    
+    // 构建层级关系：先处理区县到城市的关系
+    regionsByLevel[3].forEach(district => {
+      const parentCity = regionMap[district.parent_code];
+      if (parentCity) {
+        parentCity.children.push(district);
+      }
+    });
+    
+    // 再处理城市到省份的关系
+    regionsByLevel[2].forEach(city => {
+      const parentProvince = regionMap[city.parent_code];
+      if (parentProvince) {
+        parentProvince.children.push(city);
+      }
+    });
+    
+    // 返回省份数据（已包含完整的层级结构）
     res.json({
       success: true,
-      data: provinces
+      data: regionsByLevel[1]
     });
   } catch (error) {
     console.error('获取省份列表错误:', error);