Ulas
1122bd269b
Replace all — with - in all source files (JS, CSS, HTML, JSON, Markdown) for consistency and readability. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
114 lines
3.4 KiB
JavaScript
114 lines
3.4 KiB
JavaScript
/**
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* i18n - Internationalisierung / Übersetzungsmodul
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* Bietet t(), initI18n(), setLocale(), getLocale(), getSupportedLocales(),
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* formatDate(), formatTime() für die gesamte App.
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* Dependencies: none (vanilla JS, Fetch API, Intl API)
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*/
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const SUPPORTED_LOCALES = ['de', 'en', 'it'];
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const DEFAULT_LOCALE = 'de';
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const STORAGE_KEY = 'oikos-locale';
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let currentLocale = DEFAULT_LOCALE;
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let translations = {};
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let fallbackTranslations = {};
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/** Resolve locale: manual override > navigator.language > default */
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function resolveLocale() {
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const stored = localStorage.getItem(STORAGE_KEY);
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if (stored && SUPPORTED_LOCALES.includes(stored)) return stored;
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const browserLocales = navigator.languages || [navigator.language];
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for (const tag of browserLocales) {
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const base = tag.split('-')[0].toLowerCase();
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if (SUPPORTED_LOCALES.includes(base)) return base;
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}
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return DEFAULT_LOCALE;
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}
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/** Lade eine Locale-JSON-Datei */
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async function loadLocale(locale) {
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const resp = await fetch(`/locales/${locale}.json`);
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if (!resp.ok) throw new Error(`Failed to load locale: ${locale}`);
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return resp.json();
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}
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/** Initialisierung - einmal beim App-Start aufrufen */
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export async function initI18n() {
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currentLocale = resolveLocale();
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fallbackTranslations = await loadLocale(DEFAULT_LOCALE);
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if (currentLocale !== DEFAULT_LOCALE) {
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try {
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translations = await loadLocale(currentLocale);
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} catch {
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translations = fallbackTranslations;
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currentLocale = DEFAULT_LOCALE;
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}
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} else {
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translations = fallbackTranslations;
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}
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document.documentElement.lang = currentLocale;
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}
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/** Sprache wechseln - löst 'locale-changed' Event aus */
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export async function setLocale(locale) {
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if (!SUPPORTED_LOCALES.includes(locale)) return;
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localStorage.setItem(STORAGE_KEY, locale);
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currentLocale = locale;
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const loaded = locale === DEFAULT_LOCALE
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? fallbackTranslations
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: await loadLocale(locale);
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if (currentLocale !== locale) return;
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translations = loaded;
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document.documentElement.lang = locale;
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window.dispatchEvent(new CustomEvent('locale-changed', { detail: { locale } }));
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}
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/** Hilfsfunktion: Dot-Notation in verschachteltem Objekt auflösen */
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function resolve(obj, key) {
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return key.split('.').reduce((o, k) => (o != null ? o[k] : undefined), obj);
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}
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/** Übersetzungsfunktion mit Platzhalter-Unterstützung {{variable}} */
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export function t(key, params = {}) {
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let str = resolve(translations, key) ?? resolve(fallbackTranslations, key) ?? key;
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for (const [k, v] of Object.entries(params)) {
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str = str.replaceAll(`{{${k}}}`, String(v));
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}
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return str;
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}
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/** Aktuelle Locale abfragen */
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export function getLocale() {
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return currentLocale;
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}
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/** Liste der unterstützten Locales */
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export function getSupportedLocales() {
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return [...SUPPORTED_LOCALES];
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}
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/** Datum locale-aware formatieren */
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export function formatDate(date) {
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if (date == null) return '';
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const d = date instanceof Date ? date : new Date(date);
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if (isNaN(d.getTime())) return '';
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return new Intl.DateTimeFormat(currentLocale, {
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day: '2-digit',
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month: '2-digit',
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year: 'numeric',
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}).format(d);
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}
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/** Uhrzeit locale-aware formatieren */
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export function formatTime(date) {
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if (date == null) return '';
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const d = date instanceof Date ? date : new Date(date);
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if (isNaN(d.getTime())) return '';
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return new Intl.DateTimeFormat(currentLocale, {
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hour: '2-digit',
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minute: '2-digit',
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hour12: false,
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}).format(d);
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}
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