middleware.ts

import { authMiddleware, redirectToSignIn } from '@clerk/nextjs';
import { NextResponse } from 'next/server';

export default authMiddleware({
  // Routes that can be accessed while signed out
  publicRoutes: ['/', '/home'],
  afterAuth(auth, req, evt) {
    // Handle users who aren't authenticated
    if (!auth.userId && !auth.isPublicRoute) {
      return redirectToSignIn({ returnBackUrl: req.url });
    }
    // If the user is logged in and trying to access a protected route, allow them to access route
    if (auth.userId && !auth.isPublicRoute) {
      return NextResponse.next();
    }
    // Allow users visiting public routes to access them
    return NextResponse.next();
  },
});

export const config = {
  matcher: ['/((?!.+\\.[\\w]+$|_next).*)', '/', '/(api|trpc)(.*)'],
};