first commit

proxy.ts

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+import { NextResponse } from "next/server";
+import type { NextRequest } from "next/server";
+import { i18n } from "./i18n-config";
+
+function getLocale(request: NextRequest): string {
+  const acceptLanguage = request.headers.get("accept-language");
+  if (!acceptLanguage) return i18n.defaultLocale;
+
+  // Simple and ultra-robust parsing for accept-language header
+  const preferredLocales = acceptLanguage
+    .split(",")
+    .map((lang) => {
+      const [locale, q] = lang.split(";q=");
+      return {
+        locale: locale.trim().split("-")[0].toLowerCase(), // e.g. "tr", "en"
+        priority: q ? parseFloat(q) : 1.0,
+      };
+    })
+    .sort((a, b) => b.priority - a.priority);
+
+  for (const pref of preferredLocales) {
+    if (i18n.locales.includes(pref.locale as any)) {
+      return pref.locale;
+    }
+  }
+
+  return i18n.defaultLocale;
+}
+
+export function proxy(request: NextRequest) {
+  const pathname = request.nextUrl.pathname;
+
+  // Skip static assets, internal paths, and favicon
+  if (
+    pathname.startsWith("/_next") ||
+    pathname.startsWith("/api") ||
+    pathname.startsWith("/favicon.ico") ||
+    pathname.match(/\.(png|jpg|jpeg|gif|svg|webp|ico|css|js|woff|woff2|ttf|otf|json)$/)
+  ) {
+    return;
+  }
+
+  // Check if pathname already contains a supported locale prefix
+  const pathnameIsMissingLocale = i18n.locales.every(
+    (locale) => !pathname.startsWith(`/${locale}/`) && pathname !== `/${locale}`
+  );
+
+  if (pathnameIsMissingLocale) {
+    const locale = getLocale(request);
+    
+    // Redirect /xxx to /locale/xxx
+    return NextResponse.redirect(
+      new URL(
+        `/${locale}${pathname.startsWith("/") ? "" : "/"}${pathname}`,
+        request.url
+      )
+    );
+  }
+}
+
+export const config = {
+  // Matcher ignoring static items and api routes
+  matcher: ["/((?!api|_next/static|_next/image|favicon.ico).*)"],
+};