language Switcher added

middleware.ts

@@ -0,0 +1,136 @@
+import { NextRequest, NextResponse } from "next/server";
+import { match as matchLocale } from "@formatjs/intl-localematcher";
+import Negotiator from "negotiator";
+const PUBLIC_PAGES = ["/login", "/register"];
+
+const LOCALES = ["uz", "ru", "en"];
+const DEFAULT_LOCALE = "uz";
+
+type Locale = (typeof LOCALES)[number];
+
+function getLocaleFromPathname(pathname: string): Locale | null {
+  const segments = pathname.split("/").filter(Boolean);
+  const firstSegment = segments[0];
+
+  if (firstSegment && LOCALES.includes(firstSegment as Locale)) {
+    return firstSegment as Locale;
+  }
+
+  return null;
+}
+
+function getLocaleFromCookie(request: NextRequest): Locale | null {
+  const cookieLocale = request.cookies.get("NEXT_LOCALE")?.value;
+
+  if (cookieLocale && LOCALES.includes(cookieLocale as Locale)) {
+    return cookieLocale as Locale;
+  }
+
+  return null;
+}
+
+function getLocaleFromHeaders(request: NextRequest): Locale {
+  const negotiatorHeaders: Record<string, string> = {};
+  request.headers.forEach((value, key) => {
+    negotiatorHeaders[key] = value;
+  });
+
+  const languages = new Negotiator({ headers: negotiatorHeaders }).languages();
+
+  try {
+    return matchLocale(
+      languages,
+      LOCALES as unknown as string[],
+      DEFAULT_LOCALE
+    ) as Locale;
+  } catch {
+    return DEFAULT_LOCALE;
+  }
+}
+
+export function middleware(request: NextRequest) {
+  const { pathname, search } = request.nextUrl;
+
+  // Skip public files and API routes
+  if (
+    pathname.includes(".") ||
+    pathname.startsWith("/api") ||
+    pathname.startsWith("/_next")
+  ) {
+    return NextResponse.next();
+  }
+
+  // 1. Check URL locale
+  const localeFromPath = getLocaleFromPathname(pathname);
+
+  // 2. Check cookie locale
+  const localeFromCookie = getLocaleFromCookie(request);
+
+  // 3. Check browser locale
+  const localeFromBrowser = getLocaleFromHeaders(request);
+
+  // Priority: URL > Cookie > Browser
+  const preferredLocale =
+    localeFromPath || localeFromCookie || localeFromBrowser;
+
+  // Faqat kerakli sahifalarni redirect qilamiz
+  const isPublicPage = PUBLIC_PAGES.some((page) => pathname === page);
+
+  if (isPublicPage) {
+    const url = request.nextUrl.clone();
+    url.pathname = `/${DEFAULT_LOCALE}/verify-otp`;
+    url.search = search; // ?code=1111&phone=...
+
+    return NextResponse.redirect(url);
+  }
+
+  // If URL has no locale, redirect with preferred locale
+  if (!localeFromPath) {
+    const newUrl = new URL(`/${preferredLocale}/${pathname}`, request.url);
+    return NextResponse.redirect(newUrl);
+  }
+
+  // If URL locale differs from cookie, update cookie
+  if (localeFromPath !== localeFromCookie) {
+    const response = NextResponse.next();
+
+    // ✅ Set cookie on server side
+    response.cookies.set("NEXT_LOCALE", localeFromPath, {
+      path: "/",
+      maxAge: 31536000, // 1 year
+      sameSite: "lax",
+    });
+
+    // ✅ Pass locale to request headers for server components
+    const requestHeaders = new Headers(request.headers);
+    requestHeaders.set("x-locale", localeFromPath);
+    requestHeaders.set("x-pathname", pathname);
+
+    return NextResponse.next({
+      request: {
+        headers: requestHeaders,
+      },
+    });
+  }
+
+  // Normal flow - just pass locale in headers
+  const response = NextResponse.next();
+  const requestHeaders = new Headers(request.headers);
+  requestHeaders.set("x-locale", localeFromPath);
+  requestHeaders.set("x-pathname", pathname);
+
+  return NextResponse.next({
+    request: {
+      headers: requestHeaders,
+    },
+  });
+}
+
+export const config = {
+  matcher: [
+    // Match all pathnames except for
+    // - … if they start with `/api`, `/_next` or `/_vercel`
+    // - … the ones containing a dot (e.g. `favicon.ico`)
+    '/((?!api|_next|_vercel|.*\\..*).*)',
+  ],
+};