init

项目初始化
2026-09-03 16:49:59 +08:00
commit d7fc8c8982
40 changed files with 2688 additions and 0 deletions
--- a/utils/auth.js
+++ b/utils/auth.js
@@ -0,0 +1,109 @@
+const api = require('./api');
+
+let loginPromise = null;
+
+function getToken() {
+  return wx.getStorageSync('token') || '';
+}
+
+function setToken(token) {
+  wx.setStorageSync('token', token);
+}
+
+function clearToken() {
+  wx.removeStorageSync('token');
+}
+
+function wxLogin(retries) {
+  const remain = typeof retries === 'number' ? retries : 3;
+  return new Promise((resolve, reject) => {
+    wx.login({
+      success(res) {
+        if (res && res.code) {
+          resolve(res.code);
+        } else {
+          reject(new Error((res && res.errMsg) || '微信登录失败'));
+        }
+      },
+      fail: reject
+    });
+  }).catch((err) => {
+    // 冷启动时微信登录服务可能尚未就绪，指数退避重试
+    if (remain > 0) {
+      const delay = 400 + (4 - remain) * 200; // 首次 600ms，依次 800ms、1000ms
+      return new Promise((resolve) => setTimeout(resolve, delay))
+        .then(() => wxLogin(remain - 1));
+    }
+    throw err;
+  });
+}
+
+// 整个微信登录流程失败时重新取 code 再试一次，覆盖冷启动首个网络请求偶发失败
+function wechatLogin(retries) {
+  const remain = typeof retries === 'number' ? retries : 1;
+  return wxLogin()
+    .then((code) => api.request({
+      url: '/api/v1/auth/wechat-login',
+      method: 'POST',
+      data: { code },
+      auth: false
+    }))
+    .catch((err) => {
+      if (remain > 0) {
+        return new Promise((resolve) => setTimeout(resolve, 500)).then(() => wechatLogin(remain - 1));
+      }
+      throw err;
+    });
+}
+
+// 单例登录：App.onLaunch 与首屏页面 onShow 可能几乎同时调用，
+// 共享同一个进行中的登录 Promise，避免重复 wx.login / wechat-login 造成竞态。
+// 关键：登录失败时必须清空单例，让下一次调用能重新发起，
+// 否则冷启动 wx.login 偶发失败后，后续页面永远拿不到 token。
+function ensureLogin(refresh) {
+  const existing = getToken();
+  if (existing && !refresh) {
+    return Promise.resolve(existing);
+  }
+  if (loginPromise) {
+    return loginPromise;
+  }
+  const p = wechatLogin()
+    .then((res) => {
+      if (res && res.success) {
+        setToken(res.token);
+        return res.token;
+      }
+      // need_phone：未绑定手机号时 resolve(null)，由页面引导去「我的」绑定
+      return null;
+    })
+    .finally(() => {
+      // 无论成功失败，完成后都清掉单例，让下一次调用可以重新发起
+      if (loginPromise === p) {
+        loginPromise = null;
+      }
+    });
+  loginPromise = p;
+  return p;
+}
+
+function loginWithPhone(phoneCode) {
+  return wxLogin()
+    .then((code) => api.request({
+      url: '/api/v1/auth/bind-phone',
+      method: 'POST',
+      data: { code, phone_code: phoneCode },
+      auth: false
+    }))
+    .then((res) => {
+      if (res && res.success) {
+        setToken(res.token);
+        return res;
+      }
+      const error = new Error((res && res.error) || '手机号登录失败');
+      error.error = (res && res.error) || '手机号登录失败';
+      throw error;
+    });
+}
+
+module.exports = { getToken, setToken, clearToken, wxLogin, ensureLogin, loginWithPhone };