penx/middleware.ts

import { getToken } from 'next-auth/jwt'
import { NextRequest, NextResponse } from 'next/server'

export const config = {
  matcher: [
    /*
     * Match all paths except for:
     * 1. /api routes
     * 2. /_next (Next.js internals)
     * 3. /_static (inside /public)
     * 4. all root files inside /public (e.g. /favicon.ico)
     */
    '/((?!api/|_next/|_static/|_vercel|[\\w-]+\\.\\w+).*)',
  ],
}

export default async function middleware(req: NextRequest) {
  const url = req.nextUrl

  // Get hostname of request (e.g. demo.vercel.pub, demo.localhost:3000)
  let hostname = req.headers
    .get('host')!
    .replace('.localhost:3000', `.${process.env.NEXT_PUBLIC_ROOT_DOMAIN}`)

  // special case for Vercel preview deployment URLs
  if (
    hostname.includes('---') &&
    hostname.endsWith(`.${process.env.NEXT_PUBLIC_VERCEL_DEPLOYMENT_SUFFIX}`)
  ) {
    hostname = `${hostname.split('---')[0]}.${
      process.env.NEXT_PUBLIC_ROOT_DOMAIN
    }`
  }

  const searchParams = req.nextUrl.searchParams.toString()
  // Get the pathname of the request (e.g. /, /about, /blog/first-post)
  const path = `${url.pathname}${
    searchParams.length > 0 ? `?${searchParams}` : ''
  }`

  if (path === '/login') {
    const token = await getToken({ req })
    if (token) {
      return NextResponse.redirect(new URL('/', req.url))
    } else {
      return NextResponse.next()
    }
  }

  // if (path === '/token') {
  //   return NextResponse.next()
  // }

  if (path === '/') {
    return NextResponse.rewrite(
      new URL(`/home${path === '/' ? '' : path}`, req.url),
      {
        headers: { 'x-current-url': path },
      },
    )
  }

  if (path.startsWith('/~/') || path === '/d') {
    const token = await getToken({ req })
    if (!token) {
      return NextResponse.redirect(new URL('/login', req.url))
    }
    return NextResponse.rewrite(new URL(path, req.url))
  }

  if (path.startsWith('/@')) {
    return NextResponse.rewrite(new URL(`/space${path}`, req.url), {
      headers: { 'x-current-url': path },
    })
  }

  // rewrite root application to `/home` folder
  // if (
  //   hostname === 'localhost:3000' ||
  //   hostname === process.env.NEXT_PUBLIC_ROOT_DOMAIN
  // ) {
  //   return NextResponse.rewrite(
  //     new URL(`/home${path === '/' ? '' : path}`, req.url),
  //   )
  // }

  // rewrite everything else to `/[domain]/[slug] dynamic route
  // return NextResponse.rewrite(new URL(`/${hostname}${path}`, req.url))

  // return NextResponse.rewrite(
  //   new URL(`/home${path === '/' ? '' : path}`, req.url),
  // )

  return NextResponse.next()
}