feat: initialize AutoTeacher Next.js project structure

src/middleware.ts

@@ -0,0 +1,39 @@
+import { clerkMiddleware } from "@clerk/nextjs/server";
+import { NextResponse } from "next/server";
+
+export default clerkMiddleware(async (auth, req) => {
+  const { pathname } = req.nextUrl;
+  
+  // 定义公开路由
+  const publicRoutes = [
+    "/",
+    "/favicon.ico",
+    "/api/courses",
+  ];
+  
+  // 检查是否是公开路由
+  const isPublicRoute = publicRoutes.some(route => pathname === route) ||
+    pathname.match(/^\/api\/courses\/[^\/]+\/classrooms$/) ||
+    pathname.match(/^\/api\/classrooms\/[^\/]+\/assignments$/) ||
+    pathname.match(/^\/api\/assignments\/[^\/]+\/submissions$/) ||
+    pathname.match(/^\/api\/assignments\/[^\/]+\/submissions\/upload$/);
+  
+  // 如果不是公开路由，则需要认证
+  if (!isPublicRoute) {
+    const { userId } = await auth();
+    if (!userId && pathname.startsWith("/api/")) {
+      return NextResponse.json({ error: "未授权" }, { status: 401 });
+    }
+    if (!userId) {
+      return NextResponse.redirect(new URL("/", req.url));
+    }
+  }
+  
+  return NextResponse.next();
+});
+
+export const config = {
+  matcher: [
+    "/((?!_next/static|_next/image|favicon.ico|.*\\.(?:svg|png|jpg|jpeg|gif|webp)$).*)",
+  ],
+};