refactor maintenance mode enforcement

middleware.ts

@@ -3,11 +3,8 @@ import { NextResponse } from "next/server";
 import type { NextRequest } from "next/server";
 
 import { routing } from "./i18n/routing";
-import { getLocalizedPath } from "./lib/locale";
 
 const intlMiddleware = createMiddleware(routing);
-const ADMIN_SESSION_COOKIE = "moh_admin_session";
-const ADMIN_SESSION_VALUE = "superadmin";
 
 function isRootBasicAuthConfigured(): boolean {
   return Boolean(process.env.ROOT_BASIC_AUTH_USER && process.env.ROOT_BASIC_AUTH_PASS);
@@ -42,99 +39,6 @@ function isRootBasicAuthValid(request: NextRequest): boolean {
   }
 }
 
-function getLocaleFromPathname(pathname: string): string | null {
-  for (const locale of routing.locales) {
-    if (pathname === `/${locale}` || pathname.startsWith(`/${locale}/`)) {
-      return locale;
-    }
-  }
-
-  return null;
-}
-
-function timingSafeEqualString(a: string, b: string): boolean {
-  if (a.length !== b.length) {
-    return false;
-  }
-
-  let mismatch = 0;
-
-  for (let index = 0; index < a.length; index += 1) {
-    mismatch |= a.charCodeAt(index) ^ b.charCodeAt(index);
-  }
-
-  return mismatch === 0;
-}
-
-function toHex(buffer: ArrayBuffer): string {
-  return Array.from(new Uint8Array(buffer))
-    .map((value) => value.toString(16).padStart(2, "0"))
-    .join("");
-}
-
-async function signAdminValue(value: string): Promise<string | null> {
-  const secret = process.env.ADMIN_AUTH_SECRET ?? "";
-  if (!secret) {
-    return null;
-  }
-
-  const encoder = new TextEncoder();
-  const key = await crypto.subtle.importKey(
-    "raw",
-    encoder.encode(secret),
-    { name: "HMAC", hash: "SHA-256" },
-    false,
-    ["sign"],
-  );
-  const signature = await crypto.subtle.sign("HMAC", key, encoder.encode(value));
-
-  return toHex(signature);
-}
-
-async function isAdminSessionValid(request: NextRequest): Promise<boolean> {
-  const token = request.cookies.get(ADMIN_SESSION_COOKIE)?.value;
-  if (!token) {
-    return false;
-  }
-
-  const parts = token.split(".");
-  if (parts.length !== 2) {
-    return false;
-  }
-
-  const [value, signature] = parts;
-  if (value !== ADMIN_SESSION_VALUE) {
-    return false;
-  }
-
-  const expected = await signAdminValue(value);
-  if (!expected) {
-    return false;
-  }
-
-  return timingSafeEqualString(signature, expected);
-}
-
-async function getMaintenanceModeFromApi(request: NextRequest): Promise<boolean> {
-  try {
-    const response = await fetch(new URL("/api/maintenance", request.nextUrl.origin), {
-      cache: "no-store",
-      headers: {
-        "x-middleware-check": "1",
-      },
-    });
-
-    if (!response.ok) {
-      return false;
-    }
-
-    const data = (await response.json()) as { enabled?: boolean };
-    return data.enabled === true;
-  } catch {
-    return false;
-  }
-}
-
 export default async function middleware(request: NextRequest) {
   const { pathname } = request.nextUrl;
   const isRootBaseRoute = pathname === "/root" || pathname.startsWith("/root/");
@@ -156,29 +60,6 @@ export default async function middleware(request: NextRequest) {
     });
   }
 
-  const locale = getLocaleFromPathname(pathname);
-  const isComingSoonRoute =
-    locale !== null &&
-    (pathname === `/${locale}/coming-soon` || pathname.startsWith(`/${locale}/coming-soon/`));
-  const isLocalizedSiteRoute = locale !== null && !isComingSoonRoute;
-  const isTopLevelRootRoute = pathname === "/";
-
-  if (!isRootBaseRoute && (isLocalizedSiteRoute || isTopLevelRootRoute)) {
-    const maintenanceEnabled = await getMaintenanceModeFromApi(request);
-
-    if (maintenanceEnabled) {
-      const isAdminAuthenticated = await isAdminSessionValid(request);
-
-      if (!isAdminAuthenticated) {
-        const targetLocale = locale ?? routing.defaultLocale;
-        const redirectUrl = request.nextUrl.clone();
-        redirectUrl.pathname = getLocalizedPath(targetLocale, "/coming-soon");
-        redirectUrl.search = "";
-        return NextResponse.redirect(redirectUrl);
-      }
-    }
-  }
-
   if (isRootBaseRoute) {
     return NextResponse.next();
   }