Language, formats and reading direction

// apps/docs/examples/i18n/direction.tsx'use client';
import {useState} from 'react';
import {toIanaTimeZone} from '@workspace/active-format';import type {LanguageConfig, LocaleTranslations} from '@workspace/active-i18n';import {  fixedTimeZone,  I18nProvider,  TimeZoneProvider,  useFormatters,  useLocale,  useTranslations,} from '@workspace/active-i18n/react';import {DirectionProvider} from '@workspace/active-ui/components/primitives/direction';import {Slider} from '@workspace/active-ui/components/primitives/slider';import {  Tabs,  TabsList,  TabsTrigger,} from '@workspace/active-ui/components/primitives/tabs';
// The host's language set: the direction of each language is the host's data.const LANGUAGES: readonly LanguageConfig[] = [  {code: 'en', label: 'English', direction: 'ltr'},  {code: 'ar', label: 'العربية', direction: 'rtl'},];
const TRANSLATIONS: Record<string, LocaleTranslations> = {  en: {    order: {      title: 'Order {{id}}',      placed: 'Placed on',      total: 'Total',      progress: 'Progress',    },  },  ar: {    order: {      title: 'الطلب {{id}}',      placed: 'تاريخ الطلب',      total: 'المجموع',      progress: 'التقدم',    },  },};
function OrderSummary() {  const t = useTranslations();  const locale = useLocale();  const format = useFormatters();  return (    <div className="flex flex-col gap-3">      <p className="font-medium" data-i18n-locale={locale}>        {t('order.title', {id: '1042'})}      </p>      <dl className="grid grid-cols-[auto_1fr] gap-x-4 gap-y-1 text-sm">        <dt className="text-muted-foreground">{t('order.placed')}</dt>        <dd>{format.dateTime('2026-10-21T09:30:00Z')}</dd>        <dt className="text-muted-foreground">{t('order.total')}</dt>        <dd>{format.currency({amount: 1234.5, currency: 'EUR'})}</dd>      </dl>      <Slider defaultValue={30} aria-label={t('order.progress')} />    </div>  );}
/** * The language decides the words and the formats; the host decides the * direction from its language data and sets `dir` and `DirectionProvider`, * so the layout and the arrow keys follow the reading direction. */export default function Direction() {  const [code, setCode] = useState('ar');  const language = LANGUAGES.find((entry) => entry.code === code)!;  const direction = language.direction ?? 'ltr';  return (    <div className="flex w-full max-w-md flex-col gap-4">      <Tabs value={code} onValueChange={(value) => setCode(String(value))}>        <TabsList aria-label="Language">          {LANGUAGES.map((entry) => (            <TabsTrigger key={entry.code} value={entry.code}>              {entry.label}            </TabsTrigger>          ))}        </TabsList>      </Tabs>      {/* A real host navigates to the other language (setLocale); this          demonstration remounts the provider instead. */}      <I18nProvider        key={code}        locale={code}        translations={TRANSLATIONS[code]!}        supportedLanguages={LANGUAGES}        allowLocaleSwitching={false}      >        <TimeZoneProvider          value={fixedTimeZone(toIanaTimeZone('Europe/Amsterdam'))}        >          <DirectionProvider direction={direction}>            <div              lang={code}              dir={direction}              className="rounded-lg border p-4"              data-i18n-direction={direction}            >              <OrderSummary />            </div>          </DirectionProvider>        </TimeZoneProvider>      </I18nProvider>    </div>  );}