web/apps/scandic-web/middlewares/myPages.ts

import { type NextMiddleware, NextResponse } from "next/server"

import {
  myPages,
  overview,
} from "@scandic-hotels/common/constants/routes/myPages"
import { logger } from "@scandic-hotels/common/logger"
import { findLang } from "@scandic-hotels/common/utils/languages"
import { resolve as resolveEntry } from "@scandic-hotels/trpc/utils/entry"

import { internalServerError, notFound } from "@/server/errors/next"
import { getPublicNextURL } from "@/server/utils"

import { getDefaultRequestHeaders } from "./utils"

import type { MiddlewareMatcher } from "@/types/middleware"

export const middleware: NextMiddleware = async (request) => {
  const { nextUrl } = request
  const lang = findLang(nextUrl.pathname)!

  const myPagesRoot = myPages[lang]
  if (nextUrl.pathname === myPagesRoot) {
    const nextUrlPublic = getPublicNextURL(request)
    const overviewUrl = overview[lang]
    const redirectUrl = new URL(overviewUrl, nextUrlPublic)
    logger.debug(`[myPages] redirecting to: ${redirectUrl}`)
    return NextResponse.redirect(redirectUrl, {
      status: 308,
    })
  }

  const pathNameWithoutLang = nextUrl.pathname.replace(`/${lang}`, "")
  const { uid, contentType, error } = await resolveEntry(
    pathNameWithoutLang,
    lang
  )

  if (error) {
    throw internalServerError(error)
  }
  if (!uid || !contentType) {
    throw notFound(
      `Unable to resolve CMS entry for locale "${lang}": ${pathNameWithoutLang}`
    )
  }

  const headers = getDefaultRequestHeaders(request)
  headers.set("x-uid", uid)
  headers.set("x-contenttype", contentType)

  return NextResponse.next({
    request: {
      headers,
    },
  })
}

export const matcher: MiddlewareMatcher = (request) => {
  const lang = findLang(request.nextUrl.pathname)!
  return request.nextUrl.pathname.startsWith(myPages[lang])
}