refactor: 提取 requireUserId/requireUser/requireMembership 校验工具

- 新增 requireUserId：统一 14 处 userId 非空校验，返回 401
- 新增 requireUser：统一 4 处用户存在性检查，返回 404
- validateMembership 升级为 requireMembership，直接抛 403
- 混合校验拆分为 auth(401) + 字段(400)，状态码更准确

src/app/api/blindbox/draw/route.ts

@@ -1,16 +1,15 @@
 import { NextResponse } from "next/server";
 import { prisma } from "@/lib/prisma";
-import { validateMembership } from "@/lib/blindbox";
-import { apiHandler, ApiError } from "@/lib/api";
+import { requireMembership } from "@/lib/blindbox";
+import { apiHandler, ApiError, requireUserId } from "@/lib/api";
 
 export const POST = apiHandler(async (req) => {
   const { roomId, userId } = await req.json();
 
-  if (!userId || typeof userId !== "string") throw new ApiError("请先登录", 401);
+  requireUserId(userId);
   if (!roomId || typeof roomId !== "string") throw new ApiError("roomId 不能为空");
 
-  const isMember = await validateMembership(roomId, userId);
-  if (!isMember) throw new ApiError("你不是这个房间的成员", 403);
+  await requireMembership(roomId, userId);
 
   const pool = await prisma.blindBoxIdea.findMany({
     where: { roomId, status: "in_pool" },

src/app/api/blindbox/room/[code]/route.ts

@@ -1,7 +1,7 @@
 import { NextResponse } from "next/server";
 import { prisma } from "@/lib/prisma";
 import { getRoomByCode } from "@/lib/blindbox";
-import { apiHandler, ApiError } from "@/lib/api";
+import { apiHandler, ApiError, requireUserId } from "@/lib/api";
 
 export const GET = apiHandler(async (_req, { params }) => {
   const { code } = await params;
@@ -26,7 +26,7 @@ export const DELETE = apiHandler(async (req, { params }) => {
   const { code } = await params;
   const { userId } = await req.json();
 
-  if (!userId) throw new ApiError("缺少用户 ID");
+  requireUserId(userId);
 
   const room = await prisma.blindBoxRoom.findUnique({
     where: { code: code.toUpperCase() },

src/app/api/blindbox/room/join/route.ts

@@ -1,11 +1,11 @@
 import { NextResponse } from "next/server";
 import { prisma } from "@/lib/prisma";
-import { apiHandler, ApiError } from "@/lib/api";
+import { apiHandler, ApiError, requireUserId } from "@/lib/api";
 
 export const POST = apiHandler(async (req) => {
   const { userId, code } = await req.json();
 
-  if (!userId || typeof userId !== "string") throw new ApiError("请先登录", 401);
+  requireUserId(userId);
   if (!code || typeof code !== "string") throw new ApiError("请输入房间号");
 
   const room = await prisma.blindBoxRoom.findUnique({

src/app/api/blindbox/room/route.ts

@@ -1,18 +1,17 @@
 import { NextResponse } from "next/server";
 import { prisma } from "@/lib/prisma";
 import { generateUniqueRoomCode } from "@/lib/blindbox";
-import { apiHandler, ApiError } from "@/lib/api";
+import { apiHandler, ApiError, requireUserId, requireUser } from "@/lib/api";
 
 export const POST = apiHandler(async (req) => {
   const { userId, name } = await req.json();
 
-  if (!userId || typeof userId !== "string") throw new ApiError("请先登录", 401);
+  requireUserId(userId);
 
   const roomName = (name || "").trim() || "我们的周末";
   if (roomName.length > 30) throw new ApiError("房间名不能超过 30 个字");
 
-  const user = await prisma.user.findUnique({ where: { id: userId } });
-  if (!user) throw new ApiError("用户不存在", 404);
+  await requireUser(userId);
 
   const code = await generateUniqueRoomCode();
 

src/app/api/blindbox/rooms/route.ts

@@ -1,10 +1,9 @@
 import { NextResponse } from "next/server";
 import { prisma } from "@/lib/prisma";
-import { apiHandler, ApiError } from "@/lib/api";
+import { apiHandler, requireUserId } from "@/lib/api";
 
 export const GET = apiHandler(async (req) => {
-  const userId = req.nextUrl.searchParams.get("userId");
-  if (!userId) throw new ApiError("请先登录", 401);
+  const userId = requireUserId(req.nextUrl.searchParams.get("userId"));
 
   const memberships = await prisma.blindBoxMember.findMany({
     where: { userId },

src/app/api/blindbox/route.ts

@@ -1,20 +1,19 @@
 import { NextResponse } from "next/server";
 import { prisma } from "@/lib/prisma";
-import { validateMembership } from "@/lib/blindbox";
-import { apiHandler, ApiError } from "@/lib/api";
+import { requireMembership } from "@/lib/blindbox";
+import { apiHandler, ApiError, requireUserId } from "@/lib/api";
 
 export const POST = apiHandler(async (req) => {
   const { roomId, userId, content } = await req.json();
 
-  if (!userId || typeof userId !== "string") throw new ApiError("请先登录", 401);
+  requireUserId(userId);
   if (!roomId || typeof roomId !== "string") throw new ApiError("roomId 不能为空");
   if (!content || typeof content !== "string" || content.trim().length === 0) {
     throw new ApiError("内容不能为空");
   }
   if (content.trim().length > 200) throw new ApiError("内容不能超过 200 字");
 
-  const isMember = await validateMembership(roomId, userId);
-  if (!isMember) throw new ApiError("你不是这个房间的成员", 403);
+  await requireMembership(roomId, userId);
 
   const idea = await prisma.blindBoxIdea.create({
     data: { roomId, userId, content: content.trim() },
@@ -25,13 +24,11 @@ export const POST = apiHandler(async (req) => {
 
 export const GET = apiHandler(async (req) => {
   const roomId = req.nextUrl.searchParams.get("roomId");
-  const userId = req.nextUrl.searchParams.get("userId");
+  const userId = requireUserId(req.nextUrl.searchParams.get("userId"));
 
   if (!roomId) throw new ApiError("缺少 roomId");
-  if (!userId) throw new ApiError("请先登录", 401);
 
-  const isMember = await validateMembership(roomId, userId);
-  if (!isMember) throw new ApiError("你不是这个房间的成员", 403);
+  await requireMembership(roomId, userId);
 
   const [poolCount, myIdeas, drawn] = await Promise.all([
     prisma.blindBoxIdea.count({
@@ -58,7 +55,7 @@ export const GET = apiHandler(async (req) => {
 export const PUT = apiHandler(async (req) => {
   const { ideaId, userId, content } = await req.json();
 
-  if (!userId) throw new ApiError("请先登录", 401);
+  requireUserId(userId);
   if (!ideaId) throw new ApiError("缺少 ideaId");
   if (!content || typeof content !== "string" || content.trim().length === 0) {
     throw new ApiError("内容不能为空");
@@ -81,7 +78,7 @@ export const PUT = apiHandler(async (req) => {
 export const DELETE = apiHandler(async (req) => {
   const { ideaId, userId } = await req.json();
 
-  if (!userId) throw new ApiError("请先登录", 401);
+  requireUserId(userId);
   if (!ideaId) throw new ApiError("缺少 ideaId");
 
   const idea = await prisma.blindBoxIdea.findUnique({ where: { id: ideaId } });