first commit

cloudfunctions/removeMember/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, memberOpenid } = 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' }
+        }
+
+        const roomData = room.data
+        const members = roomData.members || []
+
+        // 确定要移除的成员
+        const targetOpenid = memberOpenid || openid  // 如果没有指定，默认移除自己
+
+        // 检查是否在房间内
+        const memberIndex = members.findIndex(m => m.openid === targetOpenid)
+        if (memberIndex === -1) {
+            return { success: false, msg: '该成员不在房间内' }
+        }
+
+        // 权限检查：只有创建者可以移除其他人，任何人都可以退出自己
+        if (targetOpenid !== openid && roomData._openid !== openid) {
+            return { success: false, msg: '只有创建者可以移除其他成员' }
+        }
+
+        // 检查是否是创建者试图退出
+        if (targetOpenid === roomData._openid) {
+            return { success: false, msg: '创建者不能退出，请删除聚会' }
+        }
+
+        // 移除成员
+        const updatedMembers = members.filter(m => m.openid !== targetOpenid)
+
+        await roomRef.update({
+            data: {
+                members: _.set(updatedMembers)
+            }
+        })
+
+        // 如果房间已有计算结果，清除结果（因为成员变化了）
+        if (roomData.status === 'calculated') {
+            await roomRef.update({
+                data: {
+                    status: _.set('active'),
+                    lastCalculatedMembers: _.set('')  // 清除成员快照
+                }
+            })
+        }
+
+        return {
+            success: true,
+            msg: targetOpenid === openid ? '已退出聚会' : '已移除成员'
+        }
+
+    } catch (err) {
+        console.error('RemoveMember Error:', err)
+        return {
+            success: false,
+            msg: '操作失败',
+            error: err.message || err.toString()
+        }
+    }
+}