JesusValeraDev / bip39

export type WordlistLanguage =

  | 'english'

  | 'spanish'

  | 'french'

  | 'czech'

  | 'italian'

  | 'portuguese'

  | 'japanese'

  | 'korean'

  | 'chinese_simplified'

  | 'chinese_traditional';

export type UILanguage = 'en' | 'es' | 'fr' | 'cs' | 'it' | 'pt' | 'ja' | 'ko' | 'zh-Hans' | 'zh-Hant';

export const DEFAULT_LANGUAGE: WordlistLanguage = 'english';

export const DEFAULT_UI_LANGUAGE: UILanguage = 'en';

/**

 * Mapping from wordlist language to UI language code

 */

const wordlistToUIMap: Record<WordlistLanguage, UILanguage> = {

  english: 'en',

  spanish: 'es',

  french: 'fr',

  czech: 'cs',

  italian: 'it',

  portuguese: 'pt',

  japanese: 'ja',

  korean: 'ko',

  chinese_simplified: 'zh-Hans',

  chinese_traditional: 'zh-Hant',

};

export function wordlistToUILanguage(wordlistLang: string): UILanguage {

  return wordlistToUIMap[wordlistLang as WordlistLanguage] || DEFAULT_UI_LANGUAGE;

}

export function getDefaultLanguage(): WordlistLanguage {

  return DEFAULT_LANGUAGE;

}

export function determineLanguage(savedLanguage: string | null): WordlistLanguage {

  if (savedLanguage && isValidWordlistLanguage(savedLanguage)) {

    return savedLanguage as WordlistLanguage;

  }

  return DEFAULT_LANGUAGE;

}

export function isValidWordlistLanguage(lang: string): boolean {

  return Object.keys(wordlistToUIMap).includes(lang);

}

export function languagesMatch(lang1: string, lang2: string): boolean {

  return lang1 === lang2;

}

export function getSupportedLanguages(): WordlistLanguage[] {

  return Object.keys(wordlistToUIMap) as WordlistLanguage[];

}