first commit

cloudfunctions/joinRoom/index.js

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+// 云函数入口文件
+const cloud = require('wx-server-sdk')
+
+cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
+const db = cloud.database()
+const _ = db.command
+
+exports.main = async (event, context) => {
+    const wxContext = cloud.getWXContext()
+    const openid = wxContext.OPENID
+
+    const { roomId, userInfo } = event
+
+    if (!roomId) {
+        return { success: false, msg: '缺少 roomId' }
+    }
+
+    try {
+        const roomRef = db.collection('rooms').doc(roomId)
+        const room = await roomRef.get()
+
+        if (!room.data) {
+            return { success: false, msg: '房间不存在' }
+        }
+
+        // 检查是否已经在房间内
+        const members = room.data.members || []
+        const isMember = members.some(m => m.openid === openid)
+
+        if (!isMember) {
+            // 加入房间
+            const newMember = {
+                openid: openid,
+                avatarUrl: userInfo?.avatarUrl || 'https://mmbiz.qpic.cn/mmbiz/icTdbqWNOwNRna42FI242Lcia07jQodd2FJGIYQfG0LAJGFxM4FbnQP6yfMxBgJ0F3YRqJCJ1aPAK2dQagdusBZg/0',
+                nickName: userInfo?.nickName || '微信用户',
+                location: null,
+                joinedAt: new Date()
+            }
+
+            await roomRef.update({
+                data: {
+                    members: _.push(newMember)
+                }
+            })
+        }
+
+        return {
+            success: true,
+            msg: '加入成功'
+        }
+
+    } catch (err) {
+        console.error(err)
+        return {
+            success: false,
+            msg: '加入失败',
+            error: err
+        }
+    }
+}

cloudfunctions/joinRoom/package.json

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+{
+    "name": "joinRoom",
+    "version": "1.0.0",
+    "description": "",
+    "main": "index.js",
+    "scripts": {
+        "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "dependencies": {
+        "wx-server-sdk": "3.0.1"
+    }
+}