第一次提交：微信小程序前端最新完整代码

utils/login.js

@@ -0,0 +1,73 @@
+// utils/login.js
+import {
+  applyWechatLoginData,
+  backfillUserProfileCache,
+  getSessionToken,
+  isWechatLoginSuccess,
+} from './role-tab-bar';
+
+const app = getApp();
+
+export function ensureLogin(options = {}) {
+  const silent = options.silent !== false;
+  const page = options.page || null;
+  const token = getSessionToken(app);
+  if (token) {
+    backfillUserProfileCache(app);
+    return Promise.resolve(true);
+  }
+
+  // 关键：如果已有登录流程正在执行，直接返回那个 Promise，避免并发登录
+  if (app.globalData.loginPromise) {
+    return app.globalData.loginPromise;
+  }
+
+  // 开始新的登录流程
+  const loginPromise = new Promise(async (resolve, reject) => {
+    if (silent) {
+      wx.showLoading({ title: '自动登录中...', mask: true });
+    }
+    try {
+      const loginRes = await wx.login();
+      if (!loginRes.code) throw new Error('获取微信登录码失败');
+
+      const apiBaseUrl = app.globalData.apiBaseUrl;
+      if (!apiBaseUrl) throw new Error('服务器配置错误');
+
+      const res = await new Promise((resolve, reject) => {
+        wx.request({
+          url: apiBaseUrl + '/yonghu/wechatlogin',
+          method: 'POST',
+          data: { code: loginRes.code },
+          header: { 'content-type': 'application/json' },
+          success: resolve,
+          fail: reject,
+        });
+      });
+
+      const userData = res.data && (res.data.data || res.data);
+      if (res.statusCode === 200 && isWechatLoginSuccess(res.data) && userData) {
+        applyWechatLoginData(userData, page);
+        resolve(true);
+      } else {
+        const msg = res.data?.msg || '登录失败';
+        wx.showToast({ title: msg, icon: 'none' });
+        reject(new Error(msg));
+      }
+    } catch (error) {
+      wx.showToast({ title: error.message || '登录失败', icon: 'none' });
+      reject(error);
+    } finally {
+      if (silent) wx.hideLoading();
+    }
+  });
+
+  // 存储全局登录 Promise，供 request.js 感知
+  app.globalData.loginPromise = loginPromise;
+  // 无论成功或失败，完成后清空标记
+  loginPromise.finally(() => {
+    app.globalData.loginPromise = null;
+  });
+
+  return loginPromise;
+}