Merged in feat/book-245-preferred-lang-redirect (pull request #2861)

Feat/book 245 preferred lang redirect

* added cookie to save preferredLang and middleware to route accordingly

* Cleaned up code, added noValidLang.ts middleware

* cleaned a little more

* Added headers in languageRedirect and set language cookie maxAge to 1 year


Approved-by: Linus Flood

apps/scandic-web/middlewares/languageRedirect.ts

@@ -0,0 +1,26 @@
+import { type NextMiddleware, NextResponse } from "next/server"
+
+import { Lang } from "@scandic-hotels/common/constants/language"
+
+import { getDefaultRequestHeaders } from "./utils"
+
+import type { MiddlewareMatcher } from "@/types/middleware"
+
+export const middleware: NextMiddleware = (request) => {
+  const headers = getDefaultRequestHeaders(request)
+  const preferredLang = request.cookies.get("preferredLang")?.value ?? Lang.en
+
+  // Set x-lang header
+  headers.set("x-lang", preferredLang)
+
+  // Redirect to new URL if no lang in URL
+  const newUrl = new URL(`/${preferredLang}`, request.url)
+  return NextResponse.redirect(newUrl, {
+    headers,
+  })
+}
+
+export const matcher: MiddlewareMatcher = (request) => {
+  // if ULR is empty
+  return request.nextUrl.pathname.length <= 1
+}

apps/scandic-web/middlewares/noValidLang.ts

@@ -0,0 +1,29 @@
+import { type NextMiddleware, NextResponse } from "next/server"
+
+import { Lang } from "@scandic-hotels/common/constants/language"
+import { findLang } from "@scandic-hotels/common/utils/languages"
+
+import { getDefaultRequestHeaders } from "./utils"
+
+import type { MiddlewareMatcher } from "@/types/middleware"
+
+export const middleware: NextMiddleware = (request) => {
+  const headers = getDefaultRequestHeaders(request)
+
+  headers.set("x-lang", Lang.en)
+  return NextResponse.rewrite(
+    new URL(`/${Lang.en}/middleware-error/404`, request.nextUrl),
+    {
+      request: {
+        headers,
+      },
+      status: 404,
+      statusText: "Not found",
+    }
+  )
+}
+
+export const matcher: MiddlewareMatcher = (request) => {
+  const lang = findLang(request.nextUrl.pathname)
+  return !lang
+}