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

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()
+}