blog/src/i18n/lang.ts

import { allLocales, defaultLocale, moreLocales } from '@/config'

// Gets the language code from the current path
export function getLangFromPath(path: string) {
  const currentLang = moreLocales.find(
    lang =>
      path.startsWith(`/${lang}/`),
  )
  return currentLang || defaultLocale
}

// Get the next language code in the global language cycle
export function getNextGlobalLang(currentLang: string): string {
  // Get index of current language
  const currentIndex = allLocales.indexOf(currentLang)
  if (currentIndex === -1) {
    return defaultLocale
  }

  // Calculate and return next language in cycle
  const nextIndex = (currentIndex + 1) % allLocales.length
  return allLocales[nextIndex]
}