@prezly/theme-kit-core/build/routing/utils/getShortestLocaleSlug.cjs

Data layer and utility library for developing Prezly themes with JavaScript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getShortestLocaleSlug = getShortestLocaleSlug;
var _themeKitIntl = require("@prezly/theme-kit-intl");
var _isNumberCode = require("./isNumberCode.cjs");
/**
 * Get the shortest locale code possible from full locale code
 * First: try shorting to neutral language code (there should be no locales with the same language code)
 * Then: try shorting to region code (there should be no locales with the same region code)
 * Finally: return the original locale code (shorting is not possible)
 */
function getShortestLocaleSlug(locale, context) {
  var _ref, _getUnambiguousLangCo;
  var {
    code: localeCode,
    lang: langCode,
    region: regionCode,
    slug: localeSlug
  } = _themeKitIntl.Locale.from(locale);

  // If it's a default locale, return false (no locale needed in URL)
  if (localeCode === context.defaultLocale) {
    return false;
  }
  var shortened = // Try shortening to neutral language code
  (_ref = (_getUnambiguousLangCo = getUnambiguousLangCode(langCode, context)) !== null && _getUnambiguousLangCo !== void 0 ? _getUnambiguousLangCo :
  // Try shortening to region code
  getUnambiguousRegionCode(regionCode, context)) !== null && _ref !== void 0 ? _ref :
  // Return the original (exact) code if shortening is not possible
  localeSlug;
  return shortened.toLowerCase();
}
function getUnambiguousLangCode(langCode, context) {
  var candidates = context.locales.filter(code => _themeKitIntl.Locale.isLanguageCode(code, langCode));
  if (candidates.length === 1) {
    return langCode;
  }
  return undefined;
}
function getUnambiguousRegionCode(regionCode, context) {
  if (!regionCode) {
    return undefined;
  }
  if ((0, _isNumberCode.isNumberCode)(regionCode)) {
    // We don't want just numbers in our region code
    return undefined;
  }
  var candidates = context.locales.filter(locale => _themeKitIntl.Locale.isRegionCode(locale, regionCode));
  // Prevent collision with neutral language codes
  var collisions = context.locales.filter(locale => _themeKitIntl.Locale.isLanguageCode(locale, regionCode.toLowerCase()));
  if (candidates.length === 1 && collisions.length === 0) {
    return regionCode;
  }
  return undefined;
}