0.0.0

cloudfunctions/login/index.js

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+// 云函数 login — 登录 + 首次建用户，返回 hasDog 决定跳建档/首页
+// 契约见 docs/03-云函数设计.md §1
+const cloud = require('wx-server-sdk');
+cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV });
+const db = cloud.database();
+
+exports.main = async (event, context) => {
+  const { OPENID } = cloud.getWXContext(); // 可信用户标识
+  const usersCol = db.collection('users');
+  const dogsCol = db.collection('dogs');
+
+  // 1. 查用户，不存在则建档
+  let userInfo;
+  const userRes = await usersCol.where({ _openid: OPENID }).limit(1).get();
+  if (userRes.data.length === 0) {
+    const now = Date.now();
+    const doc = {
+      _openid: OPENID,
+      nickname: '铲屎官',
+      avatar: '',
+      walkCount: 0,
+      joinedAt: now,
+      createdAt: now,
+    };
+    const addRes = await usersCol.add({ data: doc });
+    userInfo = { _id: addRes._id, ...doc };
+  } else {
+    userInfo = userRes.data[0];
+  }
+
+  // 2. 是否已有狗狗 → 决定前端跳建档(0b)还是首页(1)
+  const countRes = await dogsCol.where({ _openid: OPENID }).count();
+  const hasDog = countRes.total > 0;
+
+  return {
+    ok: true,
+    data: {
+      userInfo: {
+        openid: OPENID,
+        nickname: userInfo.nickname,
+        avatar: userInfo.avatar,
+        walkCount: userInfo.walkCount,
+        joinedAt: userInfo.joinedAt,
+      },
+      hasDog,
+    },
+  };
+};