feat(WEB-132): add middlewares, support for seamless login and improve lang based routes

app/[lang]/(live)/(protected)/layout.tsx

@@ -1,6 +1,4 @@
-import { redirect } from "next/navigation"
-
-import { auth } from "@/auth"
+import { auth, signIn } from "@/auth"
 
 import type { LangParams, LayoutArgs } from "@/types/params"
 
@@ -14,7 +12,10 @@ export default async function ProtectedLayout({
    *  protected route group is actually protected.
    */
   if (!session) {
-    return redirect(`/${params.lang}/login`)
+    await signIn("curity", undefined, {
+      ui_locales: params.lang,
+    })
+    return null
   }
 
   return <>{children}</>

app/[lang]/(live)/(public)/login/page.tsx

@@ -1,21 +0,0 @@
-import { signIn } from "@/auth"
-import { pageNames } from "@/constants/myPages"
-
-import type { LangParams, Params } from "@/types/params"
-
-export default async function Page({ params }: Params<LangParams>) {
-  async function login() {
-    "use server"
-    await signIn("curity", {
-      redirectTo: `/${params.lang}/${pageNames[params.lang]}`,
-    })
-  }
-
-  return (
-    <main>
-      <form action={login}>
-        <button type="submit">Sign In</button>
-      </form>
-    </main>
-  )
-}

app/[lang]/(live)/(public)/login/route.ts

@@ -0,0 +1,47 @@
+import { NextRequest, NextResponse } from "next/server"
+import { AuthError } from "next-auth"
+
+import { signIn } from "@/auth"
+import { badRequest } from "@/server/errors/next"
+
+import type { Lang } from "@/constants/languages"
+
+export async function GET(
+  request: NextRequest,
+  context: { params: { lang: Lang } }
+) {
+  const redirectTo =
+    request.headers.get("x-redirect-to") ||
+    request.nextUrl.searchParams.get("redirectTo") ||
+    undefined
+
+  try {
+    /**
+     * Passing `redirect: false` to `signIn` will return the URL instead of
+     * automatically redirecting to it inside of `signIn`.
+     * https://github.com/nextauthjs/next-auth/blob/3c035ec/packages/next-auth/src/lib/actions.ts#L76
+     */
+    const url = await signIn(
+      "curity",
+      {
+        redirectTo,
+        redirect: false,
+      },
+      {
+        ui_locales: context.params.lang,
+      }
+    )
+
+    if (url) {
+      return NextResponse.redirect(url)
+    }
+  } catch (error) {
+    if (error instanceof AuthError) {
+      console.log({ signInAuthError: error })
+    } else {
+      console.log({ signInError: error })
+    }
+  }
+
+  return badRequest()
+}