50 lines
1.6 KiB
TypeScript
50 lines
1.6 KiB
TypeScript
import type { i18n as I18nInstance } from 'i18next'
|
|
import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
|
|
|
|
/** Supported UI languages (ISO 639-1, language-only). */
|
|
export const SUPPORTED_LANGUAGES = ['de', 'en', 'da', 'sv', 'nb', 'fr', 'es'] as const
|
|
|
|
export type AppLanguage = (typeof SUPPORTED_LANGUAGES)[number]
|
|
|
|
export const LANGUAGE_FLAGS: Record<AppLanguage, string> = {
|
|
de: '🇩🇪',
|
|
en: '🇬🇧',
|
|
da: '🇩🇰',
|
|
sv: '🇸🇪',
|
|
nb: '🇳🇴',
|
|
fr: '🇫🇷',
|
|
es: '🇪🇸'
|
|
}
|
|
|
|
export function normalizeAppLanguage(language?: string): AppLanguage {
|
|
const base = (language ?? 'en').split('-')[0].toLowerCase()
|
|
if ((SUPPORTED_LANGUAGES as readonly string[]).includes(base)) {
|
|
return base as AppLanguage
|
|
}
|
|
return 'en'
|
|
}
|
|
|
|
export function getNextLanguage(current?: string): AppLanguage {
|
|
const active = normalizeAppLanguage(current)
|
|
const index = SUPPORTED_LANGUAGES.indexOf(active)
|
|
return SUPPORTED_LANGUAGES[(index + 1) % SUPPORTED_LANGUAGES.length]
|
|
}
|
|
|
|
export function isGermanLocale(language?: string): boolean {
|
|
return normalizeAppLanguage(language) === 'de'
|
|
}
|
|
|
|
/** Switch UI language and track explicit user choice (not auto-detection). */
|
|
export function changeAppLanguage(i18n: I18nInstance, language: AppLanguage): void {
|
|
const from = normalizeAppLanguage(i18n.language)
|
|
const to = normalizeAppLanguage(language)
|
|
if (from === to) return
|
|
|
|
void i18n.changeLanguage(to)
|
|
trackPlausibleEvent(PlausibleEvents.LANGUAGE_CHANGED, { from, to })
|
|
}
|
|
|
|
export function cycleAppLanguage(i18n: I18nInstance): void {
|
|
changeAppLanguage(i18n, getNextLanguage(i18n.language))
|
|
}
|