Initial commit

proxy.ts

@@ -0,0 +1,66 @@
+// proxy.ts  (was middleware.ts)
+import { NextRequest, NextResponse } from "next/server";
+import { defaultLocale, isValidLocale } from "@/lib/dictionaries";
+
+// RENAMED: middleware → proxy (Next.js 16 convention)
+export function proxy(request: NextRequest) {
+  const { pathname } = request.nextUrl;
+
+  // Skip static files, API routes, Next.js internals
+  if (
+    pathname.startsWith("/_next") ||
+    pathname.startsWith("/api") ||
+    pathname.startsWith("/favicon") ||
+    pathname.includes(".")
+  ) {
+    return NextResponse.next();
+  }
+
+  // Check if path already has a valid locale prefix
+  const pathLocale = pathname.split("/")[1];
+  if (isValidLocale(pathLocale)) {
+    // Serve directly — NEVER redirect locale-prefixed URLs.
+    // Forward the URL locale as a request header so server components
+    // without params access (e.g. not-found.tsx) can read it.
+    const requestHeaders = new Headers(request.headers);
+    requestHeaders.set("x-locale", pathLocale);
+    requestHeaders.set("x-preferred-locale", detectPreferredLocale(request));
+    return NextResponse.next({ request: { headers: requestHeaders } });
+  }
+
+  // No locale prefix — redirect to default (or cookie preference)
+  const cookieLocale = request.cookies.get("NEXT_LOCALE")?.value;
+  const targetLocale =
+    cookieLocale && isValidLocale(cookieLocale) ? cookieLocale : defaultLocale;
+
+  const url = request.nextUrl.clone();
+  url.pathname = `/${targetLocale}${pathname}`;
+  return NextResponse.redirect(url, 307);
+}
+
+function detectPreferredLocale(request: NextRequest): string {
+  const acceptLang = request.headers.get("accept-language") || "";
+
+  const segments = acceptLang
+    .split(",")
+    .map((part) => {
+      const [lang, q] = part.trim().split(";q=");
+      return {
+        lang: lang.toLowerCase().trim(),
+        quality: q ? parseFloat(q) : 1.0,
+      };
+    })
+    .sort((a, b) => b.quality - a.quality);
+
+  for (const { lang } of segments) {
+    const base = lang.split("-")[0];
+    if (["sr", "bs", "hr"].includes(base)) return "sr";
+    if (base === "en") return "en";
+  }
+
+  return defaultLocale;
+}
+
+export const config = {
+  matcher: ["/((?!_next|api|favicon\\.ico|.*\\..*).*)"],
+};