feat: ✨ add next-intl and configure middleware, locales

17 changed files with 271 additions and 85 deletions
--- a/messages/en.json
+++ b/messages/en.json
@ -0,0 +1,6 @@
+{
+  "general": {
+    "home": "Home",
+    "getStarted": "Get started by editing"
+  }
+}
--- a/next.config.mts
+++ b/next.config.mts
@ -1,8 +1,11 @@
 import type { NextConfig } from "next";
+import createNextIntlPlugin from "next-intl/plugin";
 import { withPayload } from "@payloadcms/next/withPayload";

+const withNextIntl = createNextIntlPlugin("./src/i18n/config.ts");
+
 const nextConfig: NextConfig = {
  /* config options here */
 };

-export default withPayload(nextConfig);
+export default withNextIntl(withPayload(nextConfig));
--- a/package.json
+++ b/package.json
@ -22,6 +22,7 @@
    "graphql": "^16.9.0",
    "lucide-react": "^0.436.0",
    "next": "15.0.0-canary.132",
+    "next-intl": "^3.18.0",
    "payload": "^3.0.0-beta.94",
    "react": "19.0.0-rc-eb3ad065-20240822",
    "react-dom": "19.0.0-rc-eb3ad065-20240822",
--- a/src/app/(frontend)/[locale]/layout.tsx
+++ b/src/app/(frontend)/[locale]/layout.tsx
@ -1,14 +1,17 @@
+import "../globals.css";
+
 import type { Metadata } from "next";
+import { NextIntlClientProvider } from "next-intl";
+import { getMessages } from "next-intl/server";
 import localFont from "next/font/local";
-import "./globals.css";

 const geistSans = localFont({
-  src: "./fonts/GeistVF.woff",
+  src: "../fonts/GeistVF.woff",
  variable: "--font-geist-sans",
  weight: "100 900",
 });
 const geistMono = localFont({
-  src: "./fonts/GeistMonoVF.woff",
+  src: "../fonts/GeistMonoVF.woff",
  variable: "--font-geist-mono",
  weight: "100 900",
 });
@ -18,15 +21,21 @@ export const metadata: Metadata = {
  description: "Generated by create next app",
 };

-export default function RootLayout({
+export default async function RootLayout({
  children,
+  params: { locale },
 }: Readonly<{
  children: React.ReactNode;
+  params: { locale: string };
 }>) {
+  const messages = await getMessages();
+
  return (
    <html lang="en">
      <body className={`${geistSans.variable} ${geistMono.variable}`}>
+        <NextIntlClientProvider messages={messages}>
          {children}
+        </NextIntlClientProvider>
      </body>
    </html>
  );
--- a/src/app/(frontend)/[locale]/page.module.css
+++ b/src/app/(frontend)/[locale]/page.module.css
--- a/src/app/(frontend)/[locale]/page.tsx
+++ b/src/app/(frontend)/[locale]/page.tsx
@ -1,7 +1,10 @@
 import Image from "next/image";
 import styles from "./page.module.css";
+import { useTranslations } from "next-intl";

 export default function Home() {
+  const t = useTranslations("HomePage");
+
  return (
    <div className={styles.page}>
      <main className={styles.main}>
@ -15,7 +18,7 @@ export default function Home() {
        />
        <ol>
          <li>
-            Get started by editing <code>src/app/page.tsx</code>.
+            {t("getStarted")} <code>src/app/page.tsx</code>.
          </li>
          <li>Save and see your changes instantly.</li>
        </ol>
--- a/src/app/(frontend)/[locale]/params.ts
+++ b/src/app/(frontend)/[locale]/params.ts
@ -0,0 +1,3 @@
+import { Locale } from "@/i18n/config";
+
+export type Params = { locale: Locale };
--- a/src/app/(payload)/admin/importMap.js
+++ b/src/app/(payload)/admin/importMap.js
@ -1,5 +1 @@
-
-
-export const importMap = {
-
-}
+export const importMap = {};
--- a/src/components/ui/button.tsx
+++ b/src/components/ui/button.tsx
@ -1,19 +1,23 @@
-import { forwardRef } from 'react'
-import { Center, styled } from 'styled-system/jsx'
-import { Spinner } from './spinner'
-import { Button as StyledButton, type ButtonProps as StyledButtonProps } from './styled/button'
+import { forwardRef } from "react";
+import { Center, styled } from "styled-system/jsx";
+import { Spinner } from "./spinner";
+import {
+  Button as StyledButton,
+  type ButtonProps as StyledButtonProps,
+} from "./styled/button";

 interface ButtonLoadingProps {
-  loading?: boolean
-  loadingText?: React.ReactNode
+  loading?: boolean;
+  loadingText?: React.ReactNode;
 }

 export interface ButtonProps extends StyledButtonProps, ButtonLoadingProps {}

-export const Button = forwardRef<HTMLButtonElement, ButtonProps>((props, ref) => {
-  const { loading, disabled, loadingText, children, ...rest } = props
+export const Button = forwardRef<HTMLButtonElement, ButtonProps>(
+  (props, ref) => {
+    const { loading, disabled, loadingText, children, ...rest } = props;

-  const trulyDisabled = loading || disabled
+    const trulyDisabled = loading || disabled;

    return (
      <StyledButton disabled={trulyDisabled} ref={ref} {...rest}>
@ -28,13 +32,20 @@ export const Button = forwardRef<HTMLButtonElement, ButtonProps>((props, ref) =>
          children
        )}
      </StyledButton>
-  )
-})
+    );
+  }
+);

-Button.displayName = 'Button'
+Button.displayName = "Button";

 const ButtonSpinner = () => (
-  <Center inline position="absolute" transform="translate(-50%, -50%)" top="50%" insetStart="50%">
+  <Center
+    inline
+    position="absolute"
+    transform="translate(-50%, -50%)"
+    top="50%"
+    insetStart="50%"
+  >
    <Spinner colorPalette="gray" />
  </Center>
-)
+);
--- a/src/components/ui/styled/button.tsx
+++ b/src/components/ui/styled/button.tsx
@ -1,7 +1,7 @@
-import { ark } from '@ark-ui/react/factory'
-import { styled } from 'styled-system/jsx'
-import { button } from 'styled-system/recipes'
-import type { ComponentProps } from 'styled-system/types'
+import { ark } from "@ark-ui/react/factory";
+import { styled } from "styled-system/jsx";
+import { button } from "styled-system/recipes";
+import type { ComponentProps } from "styled-system/types";

-export type ButtonProps = ComponentProps<typeof Button>
-export const Button = styled(ark.button, button)
+export type ButtonProps = ComponentProps<typeof Button>;
+export const Button = styled(ark.button, button);
--- a/src/components/ui/styled/utils/create-style-context.tsx
+++ b/src/components/ui/styled/utils/create-style-context.tsx
@ -6,53 +6,59 @@ import {
  createContext,
  forwardRef,
  useContext,
-} from 'react'
-import { cx } from 'styled-system/css'
-import { type StyledComponent, isCssProperty, styled } from 'styled-system/jsx'
+} from "react";
+import { cx } from "styled-system/css";
+import { type StyledComponent, isCssProperty, styled } from "styled-system/jsx";

-type Props = Record<string, unknown>
+type Props = Record<string, unknown>;
 type Recipe = {
-  (props?: Props): Props
-  splitVariantProps: (props: Props) => [Props, Props]
-}
-type Slot<R extends Recipe> = keyof ReturnType<R>
-type Options = { forwardProps?: string[] }
+  (props?: Props): Props;
+  splitVariantProps: (props: Props) => [Props, Props];
+};
+type Slot<R extends Recipe> = keyof ReturnType<R>;
+type Options = { forwardProps?: string[] };

-const shouldForwardProp = (prop: string, variantKeys: string[], options: Options = {}) =>
-  options.forwardProps?.includes(prop) || (!variantKeys.includes(prop) && !isCssProperty(prop))
+const shouldForwardProp = (
+  prop: string,
+  variantKeys: string[],
+  options: Options = {}
+) =>
+  options.forwardProps?.includes(prop) ||
+  (!variantKeys.includes(prop) && !isCssProperty(prop));

 export const createStyleContext = <R extends Recipe>(recipe: R) => {
-  const StyleContext = createContext<Record<Slot<R>, string> | null>(null)
+  const StyleContext = createContext<Record<Slot<R>, string> | null>(null);

  const withRootProvider = <P extends {}>(Component: ElementType) => {
    const StyledComponent = (props: P) => {
-      const [variantProps, otherProps] = recipe.splitVariantProps(props)
-      const slotStyles = recipe(variantProps) as Record<Slot<R>, string>
+      const [variantProps, otherProps] = recipe.splitVariantProps(props);
+      const slotStyles = recipe(variantProps) as Record<Slot<R>, string>;

      return (
        <StyleContext.Provider value={slotStyles}>
          <Component {...otherProps} />
        </StyleContext.Provider>
-      )
-    }
-    return StyledComponent
-  }
+      );
+    };
+    return StyledComponent;
+  };

  const withProvider = <T, P extends { className?: string | undefined }>(
    Component: ElementType,
    slot: Slot<R>,
-    options?: Options,
+    options?: Options
  ): ForwardRefExoticComponent<PropsWithoutRef<P> & RefAttributes<T>> => {
    const StyledComponent = styled(
      Component,
      {},
      {
-        shouldForwardProp: (prop, variantKeys) => shouldForwardProp(prop, variantKeys, options),
-      },
-    ) as StyledComponent<ElementType>
+        shouldForwardProp: (prop, variantKeys) =>
+          shouldForwardProp(prop, variantKeys, options),
+      }
+    ) as StyledComponent<ElementType>;
    const StyledSlotProvider = forwardRef<T, P>((props, ref) => {
-      const [variantProps, otherProps] = recipe.splitVariantProps(props)
-      const slotStyles = recipe(variantProps) as Record<Slot<R>, string>
+      const [variantProps, otherProps] = recipe.splitVariantProps(props);
+      const slotStyles = recipe(variantProps) as Record<Slot<R>, string>;

      return (
        <StyleContext.Provider value={slotStyles}>
@ -62,34 +68,38 @@ export const createStyleContext = <R extends Recipe>(recipe: R) => {
            className={cx(slotStyles?.[slot], props.className)}
          />
        </StyleContext.Provider>
-      )
-    })
+      );
+    });
    // @ts-expect-error
-    StyledSlotProvider.displayName = Component.displayName || Component.name
+    StyledSlotProvider.displayName = Component.displayName || Component.name;

-    return StyledSlotProvider
-  }
+    return StyledSlotProvider;
+  };

  const withContext = <T, P extends { className?: string | undefined }>(
    Component: ElementType,
-    slot: Slot<R>,
+    slot: Slot<R>
  ): ForwardRefExoticComponent<PropsWithoutRef<P> & RefAttributes<T>> => {
-    const StyledComponent = styled(Component)
+    const StyledComponent = styled(Component);
    const StyledSlotComponent = forwardRef<T, P>((props, ref) => {
-      const slotStyles = useContext(StyleContext)
+      const slotStyles = useContext(StyleContext);
      return (
-        <StyledComponent {...props} ref={ref} className={cx(slotStyles?.[slot], props.className)} />
-      )
-    })
+        <StyledComponent
+          {...props}
+          ref={ref}
+          className={cx(slotStyles?.[slot], props.className)}
+        />
+      );
+    });
    // @ts-expect-error
-    StyledSlotComponent.displayName = Component.displayName || Component.name
+    StyledSlotComponent.displayName = Component.displayName || Component.name;

-    return StyledSlotComponent
-  }
+    return StyledSlotComponent;
+  };

  return {
    withRootProvider,
    withProvider,
    withContext,
-  }
-}
+  };
+};
--- a/src/i18n/config.ts
+++ b/src/i18n/config.ts
@ -0,0 +1,13 @@
+import { Locale } from "@/i18n/locales";
+import { getRequestConfig } from "next-intl/server";
+import { notFound } from "next/navigation";
+import { routing } from "@/i18n/routing";
+
+export default getRequestConfig(async ({ locale }) => {
+  // Validate that the incoming `locale` parameter is valid
+  if (!routing.locales.includes(locale as Locale)) notFound();
+
+  return {
+    messages: (await import(`../messages/${locale}.json`)).default,
+  };
+});
--- a/src/i18n/locales.ts
+++ b/src/i18n/locales.ts
@ -0,0 +1,24 @@
+export const locales = [
+  {
+    label: {
+      de: "Deutsch",
+      en: "German",
+      fr: "Allemand",
+      it: "Tedesco",
+    },
+    code: "de",
+  },
+  {
+    label: {
+      de: "Englisch",
+      en: "English",
+      it: "Inglese",
+      fr: "Anglais",
+    },
+    code: "en",
+  },
+] as const;
+
+export type Locale = (typeof locales)[number]["code"];
+
+export const defaultLocale: Locale = "en";
--- a/src/i18n/navigation.ts
+++ b/src/i18n/navigation.ts
@ -0,0 +1,8 @@
+// Lightweight wrappers around Next.js' navigation APIs
+
+import { createLocalizedPathnamesNavigation } from "next-intl/navigation";
+import { routing } from "@/i18n/routing";
+
+// that will consider the routing configuration
+export const { Link, redirect, usePathname, useRouter } =
+  createLocalizedPathnamesNavigation(routing);
--- a/src/i18n/routing.ts
+++ b/src/i18n/routing.ts
@ -0,0 +1,20 @@
+import { defaultLocale, locales } from "./locales";
+
+import { defineRouting } from "next-intl/routing";
+
+export const routing = defineRouting({
+  // A list of all locales that are supported
+  locales: locales.map(({ code }) => code),
+
+  // Used when no locale matches
+  defaultLocale,
+
+  localePrefix: "as-needed",
+
+  pathnames: {
+    "/about": {
+      en: "/about",
+      de: "/ueber-uns",
+    },
+  },
+});
--- a/src/middleware.ts
+++ b/src/middleware.ts
@ -0,0 +1,8 @@
+import createMiddleware from "next-intl/middleware";
+import { routing } from "@/i18n/routing";
+
+export default createMiddleware(routing);
+
+export const config = {
+  matcher: ["/((?!api|admin|static|.*\\..*|_next|favicon.ico|robots.txt).*)"],
+};
--- a/yarn.lock
+++ b/yarn.lock
@ -1168,6 +1168,45 @@
  resolved "https://registry.yarnpkg.com/@floating-ui/utils/-/utils-0.2.7.tgz#d0ece53ce99ab5a8e37ebdfe5e32452a2bfc073e"
  integrity sha512-X8R8Oj771YRl/w+c1HqAC1szL8zWQRwFvgDwT129k9ACdBoud/+/rX9V0qiMl6LWUdP9voC2nDVZYPMQQsb6eA==

+"@formatjs/ecma402-abstract@2.0.0":
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/@formatjs/ecma402-abstract/-/ecma402-abstract-2.0.0.tgz#39197ab90b1c78b7342b129a56a7acdb8f512e17"
+  integrity sha512-rRqXOqdFmk7RYvj4khklyqzcfQl9vEL/usogncBHRZfZBDOwMGuSRNFl02fu5KGHXdbinju+YXyuR+Nk8xlr/g==
+  dependencies:
+    "@formatjs/intl-localematcher" "0.5.4"
+    tslib "^2.4.0"
+
+"@formatjs/fast-memoize@2.2.0", "@formatjs/fast-memoize@^2.2.0":
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/@formatjs/fast-memoize/-/fast-memoize-2.2.0.tgz#33bd616d2e486c3e8ef4e68c99648c196887802b"
+  integrity sha512-hnk/nY8FyrL5YxwP9e4r9dqeM6cAbo8PeU9UjyXojZMNvVad2Z06FAVHyR3Ecw6fza+0GH7vdJgiKIVXTMbSBA==
+  dependencies:
+    tslib "^2.4.0"
+
+"@formatjs/icu-messageformat-parser@2.7.8":
+  version "2.7.8"
+  resolved "https://registry.yarnpkg.com/@formatjs/icu-messageformat-parser/-/icu-messageformat-parser-2.7.8.tgz#f6d7643001e9bb5930d812f1f9a9856f30fa0343"
+  integrity sha512-nBZJYmhpcSX0WeJ5SDYUkZ42AgR3xiyhNCsQweFx3cz/ULJjym8bHAzWKvG5e2+1XO98dBYC0fWeeAECAVSwLA==
+  dependencies:
+    "@formatjs/ecma402-abstract" "2.0.0"
+    "@formatjs/icu-skeleton-parser" "1.8.2"
+    tslib "^2.4.0"
+
+"@formatjs/icu-skeleton-parser@1.8.2":
+  version "1.8.2"
+  resolved "https://registry.yarnpkg.com/@formatjs/icu-skeleton-parser/-/icu-skeleton-parser-1.8.2.tgz#2252c949ae84ee66930e726130ea66731a123c9f"
+  integrity sha512-k4ERKgw7aKGWJZgTarIcNEmvyTVD9FYh0mTrrBMHZ1b8hUu6iOJ4SzsZlo3UNAvHYa+PnvntIwRPt1/vy4nA9Q==
+  dependencies:
+    "@formatjs/ecma402-abstract" "2.0.0"
+    tslib "^2.4.0"
+
+"@formatjs/intl-localematcher@0.5.4", "@formatjs/intl-localematcher@^0.5.4":
+  version "0.5.4"
+  resolved "https://registry.yarnpkg.com/@formatjs/intl-localematcher/-/intl-localematcher-0.5.4.tgz#caa71f2e40d93e37d58be35cfffe57865f2b366f"
+  integrity sha512-zTwEpWOzZ2CiKcB93BLngUX59hQkuZjT2+SAQEscSm52peDW/getsawMcWF1rGRpMCX6D7nSJA3CzJ8gn13N/g==
+  dependencies:
+    tslib "^2.4.0"
+
 "@humanwhocodes/config-array@^0.11.14":
  version "0.11.14"
  resolved "https://registry.yarnpkg.com/@humanwhocodes/config-array/-/config-array-0.11.14.tgz#d78e481a039f7566ecc9660b4ea7fe6b1fec442b"
@ -5670,6 +5709,16 @@ internal-slot@^1.0.4, internal-slot@^1.0.7:
    hasown "^2.0.0"
    side-channel "^1.0.4"

+intl-messageformat@^10.5.14:
+  version "10.5.14"
+  resolved "https://registry.yarnpkg.com/intl-messageformat/-/intl-messageformat-10.5.14.tgz#e5bb373f8a37b88fbe647d7b941f3ab2a37ed00a"
+  integrity sha512-IjC6sI0X7YRjjyVH9aUgdftcmZK7WXdHeil4KwbjDnRWjnVitKpAx3rr6t6di1joFp5188VqKcobOPA6mCLG/w==
+  dependencies:
+    "@formatjs/ecma402-abstract" "2.0.0"
+    "@formatjs/fast-memoize" "2.2.0"
+    "@formatjs/icu-messageformat-parser" "2.7.8"
+    tslib "^2.4.0"
+
 ip-address@^9.0.5:
  version "9.0.5"
  resolved "https://registry.yarnpkg.com/ip-address/-/ip-address-9.0.5.tgz#117a960819b08780c3bd1f14ef3c1cc1d3f3ea5a"
@ -6416,6 +6465,20 @@ natural-compare@^1.4.0:
  resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
  integrity sha512-OWND8ei3VtNC9h7V60qff3SVobHr996CTwgxubgyQYEpg290h9J0buyECNNJexkFm5sOajh5G116RYA1c8ZMSw==

+negotiator@^0.6.3:
+  version "0.6.3"
+  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.3.tgz#58e323a72fedc0d6f9cd4d31fe49f51479590ccd"
+  integrity sha512-+EUsqGPLsM+j/zdChZjsnX51g4XrHFOIXwfnCVPGlQk/k5giakcKsuxCObBRu6DSm9opw/O6slWbJdghQM4bBg==
+
+next-intl@^3.18.0:
+  version "3.18.0"
+  resolved "https://registry.yarnpkg.com/next-intl/-/next-intl-3.18.0.tgz#d8aa33b82a72d0a58e9ccf0a3a667c96b9642465"
+  integrity sha512-TpSwnBEHA+hEQH/bJJnDL/BkDdkSxABJv8f0rpAV6yPEw7zq/+tH84SHWzKLZYewfBBgI3yTtuGZYIIPk792pw==
+  dependencies:
+    "@formatjs/intl-localematcher" "^0.5.4"
+    negotiator "^0.6.3"
+    use-intl "^3.18.0"
+
 next-tick@^1.1.0:
  version "1.1.0"
  resolved "https://registry.yarnpkg.com/next-tick/-/next-tick-1.1.0.tgz#1836ee30ad56d67ef281b22bd199f709449b35eb"
@ -7836,6 +7899,14 @@ use-context-selector@2.0.0:
  resolved "https://registry.yarnpkg.com/use-context-selector/-/use-context-selector-2.0.0.tgz#3b5dafec7aa947c152d4f0aa7f250e99a205df3d"
  integrity sha512-owfuSmUNd3eNp3J9CdDl0kMgfidV+MkDvHPpvthN5ThqM+ibMccNE0k+Iq7TWC6JPFvGZqanqiGCuQx6DyV24g==

+use-intl@^3.18.0:
+  version "3.18.0"
+  resolved "https://registry.yarnpkg.com/use-intl/-/use-intl-3.18.0.tgz#f1b448e7da33aac7a0a00acdeb54a872e33fee00"
+  integrity sha512-38A07Lyu4VapNOckenvL0PhQYetOPz5s7qoAs2wvM4yLCiye+pX8352Jhjr9mxA430zYhrLTK4pilX9VdXlX3g==
+  dependencies:
+    "@formatjs/fast-memoize" "^2.2.0"
+    intl-messageformat "^10.5.14"
+
 use-isomorphic-layout-effect@^1.1.2:
  version "1.1.2"
  resolved "https://registry.yarnpkg.com/use-isomorphic-layout-effect/-/use-isomorphic-layout-effect-1.1.2.tgz#497cefb13d863d687b08477d9e5a164ad8c1a6fb"