Added support for single localization

dist/modules/i18n/localeMiddleware.d.ts

@@ -1,21 +1,21 @@
-import type { I18nConfig } from './types.js';
+import type { I18nConfig } from '../i18n/index.js';
 /**
  * Minimal request shape the middleware reads. Kept structural so the plugin
  * doesn't hard-depend on next/server types; a Next.js `NextRequest` satisfies it.
  */
 type MiddlewareRequest = {
+    nextUrl: {
+        pathname: string;
+        search: string;
+        clone: () => URL;
+    };
     cookies: {
         get: (name: string) => {
             value: string;
         } | undefined;
     };
     headers: {
-        get: (name: string) => null | string;
-    };
-    nextUrl: {
-        clone: () => URL;
-        pathname: string;
-        search: string;
+        get: (name: string) => string | null;
     };
     url: string;
 };
@@ -25,21 +25,23 @@ type MiddlewareRequest = {
  * `next` means let the request pass through untouched.
  */
 export type LocaleMiddlewareResult = {
-    cookie?: {
-        name: string;
-        value: string;
-    };
-    location: string;
-    type: 'redirect';
-} | {
-    cookie?: {
-        name: string;
-        value: string;
-    };
     type: 'next';
+    cookie?: {
+        name: string;
+        value: string;
+    };
+} | {
+    type: 'redirect';
+    location: string;
+    cookie?: {
+        name: string;
+        value: string;
+    };
 };
 type CreateLocaleMiddlewareArgs = {
     config: I18nConfig;
+    /** Cookie name for the locale choice. Defaults to LOCALE_COOKIE_NAME. */
+    cookieName?: string;
     /**
      * Consent category that gates *persisting* the locale cookie. The locale is
      * always detected (routing works regardless), but the choice is only written
@@ -47,11 +49,9 @@ type CreateLocaleMiddlewareArgs = {
      * 'functional'. Pass 'necessary' to always persist (treat locale as strictly
      * necessary), which restores the pre-consent behaviour.
      */
-    consentCategory?: 'functional' | 'necessary';
+    consentCategory?: 'necessary' | 'functional';
     /** Name of the consent cookie to read. Defaults to CONSENT_COOKIE. */
     consentCookieName?: string;
-    /** Cookie name for the locale choice. Defaults to LOCALE_COOKIE_NAME. */
-    cookieName?: string;
 };
 /**
  * Builds locale-routing logic for Next.js middleware.
@@ -80,7 +80,7 @@ type CreateLocaleMiddlewareArgs = {
  *   return res
  * }
  */
-export declare function createLocaleMiddleware({ config, consentCategory, consentCookieName, cookieName, }: CreateLocaleMiddlewareArgs): (request: MiddlewareRequest) => LocaleMiddlewareResult;
+export declare function createLocaleMiddleware({ config, cookieName, consentCategory, consentCookieName, }: CreateLocaleMiddlewareArgs): (request: MiddlewareRequest) => LocaleMiddlewareResult;
 /**
  * Default Next.js middleware matcher: run on everything except API routes, the
  * admin panel, Next internals, and files with an extension (static assets).

dist/modules/i18n/localeMiddleware.js

@@ -1,5 +1,5 @@
+import { negotiateLocale, isValidLocale, LOCALE_COOKIE_NAME } from '../i18n/index.js';
 import { CONSENT_COOKIE, parseConsent } from '../consent/storage.js';
-import { isValidLocale, LOCALE_COOKIE_NAME, negotiateLocale } from '../i18n/index.js';
 /**
  * First path segment of a URL pathname, or '' for root.
  * '/pl/o-nas' → 'pl', '/o-nas' → 'o-nas', '/' → ''.
@@ -32,18 +32,26 @@ import { isValidLocale, LOCALE_COOKIE_NAME, negotiateLocale } from '../i18n/inde
  *   if (r.cookie) res.cookies.set(r.cookie.name, r.cookie.value)
  *   return res
  * }
- */ export function createLocaleMiddleware({ config, consentCategory = 'functional', consentCookieName = CONSENT_COOKIE, cookieName = LOCALE_COOKIE_NAME }) {
+ */ export function createLocaleMiddleware({ config, cookieName = LOCALE_COOKIE_NAME, consentCategory = 'functional', consentCookieName = CONSENT_COOKIE }) {
     // Whether the locale cookie may be written: 'necessary' is always granted;
     // 'functional' (default) requires the visitor to have consented.
     function mayPersistLocale(request) {
-        if (consentCategory === 'necessary') {
-            return true;
-        }
+        if (consentCategory === 'necessary') return true;
         const consent = parseConsent(request.cookies.get(consentCookieName)?.value);
         return consent?.[consentCategory] === true;
     }
     return function localeMiddleware(request) {
         const { pathname } = request.nextUrl;
+        // Single-locale sites have no /pl, /en prefix and no negotiation — one
+        // language, no redirect. The middleware becomes a pass-through: paths stay
+        // as-is (/o-nas), nothing to detect or persist. (Projects that are truly
+        // single-locale usually don't even mount this middleware, but guarding here
+        // makes it safe if they do.)
+        if (config.locales.length === 1) {
+            return {
+                type: 'next'
+            };
+        }
         // Already locale-prefixed (e.g. the visitor switched language by
         // navigating to /en). Routing is fine — but if the URL's locale differs
         // from the stored cookie, the visitor is *choosing* a language, and we
@@ -68,9 +76,9 @@ import { isValidLocale, LOCALE_COOKIE_NAME, negotiateLocale } from '../i18n/inde
         }
         // Resolve the locale to use
         const locale = negotiateLocale({
+            cookieLocale: request.cookies.get(cookieName)?.value ?? null,
             acceptLanguage: request.headers.get('accept-language'),
-            config,
-            cookieLocale: request.cookies.get(cookieName)?.value ?? null
+            config
         });
         // Redirect to the locale-prefixed path, preserving the rest
         const url = request.nextUrl.clone();

dist/modules/i18n/localizedPath.js

@@ -28,6 +28,12 @@ import { isValidLocale } from './helpers.js';
     if (!slug) {
         return undefined;
     }
+    // Single-locale sites have no /pl, /en prefix — the language segment is
+    // dropped entirely (path is /o-nas, not /pl/o-nas). Detected automatically:
+    // one configured locale means one language, so no prefix is needed. The
+    // project's folder structure matches (app/[[...slug]] without [locale]).
+    const singleLocale = config.locales.length === 1;
+    const localeSegment = singleLocale ? '' : `/${locale}`;
     if (prefix) {
         const segment = prefix[locale];
         // No archive slug in this locale means the entry is unreachable there —
@@ -36,12 +42,13 @@ import { isValidLocale } from './helpers.js';
         if (!segment) {
             return undefined;
         }
-        return `/${locale}/${segment}/${slug}`;
+        return `${localeSegment}/${segment}/${slug}`;
     }
     if (slug === homeSlug) {
-        return `/${locale}`;
+        // Home collapses to the root: '/' for single-locale, '/pl' otherwise.
+        return localeSegment || '/';
     }
-    return `/${locale}/${slug}`;
+    return `${localeSegment}/${slug}`;
 }
 /**
  * Resolves the equivalent path for the same document in a different locale —