Merged in feat/SW-3639-autologin-sas (pull request #3245)

Feat/SW-3639 autologin sas

* wip

* cleanup

* remove commented code and default lang to EN


Approved-by: Anton Gunnarsson

apps/partner-sas/middlewares/silentAuthMiddleware.ts

@@ -0,0 +1,27 @@
+import {
+  type NextMiddleware,
+  type NextRequest,
+  NextResponse,
+} from "next/server"
+
+import type { MiddlewareMatcher } from "./types"
+
+export const middleware: NextMiddleware = async (req) => {
+  const redirectUrl = loginRequiredRedirect(req)
+  if (redirectUrl) {
+    return NextResponse.redirect(redirectUrl)
+  }
+}
+
+function loginRequiredRedirect(req: NextRequest) {
+  if (req.nextUrl.searchParams.get("error") === "login_required") {
+    return (
+      req.cookies.get("next-auth.callback-url")?.value || req.nextUrl.origin
+    )
+  }
+  return undefined
+}
+
+export const matcher: MiddlewareMatcher = (request) => {
+  return request.nextUrl.pathname === "/api/web/auth/callback/sas"
+}