@dnb/eufemia/shared/icuFormatMessage.js

DNB Eufemia Design System UI Library

import IntlMessageFormat from 'intl-messageformat';
const ICU_PATTERN = /\{[^}]+,\s*(?:plural|select|selectordinal|number|date|time)\b/;
const MAX_CACHE_SIZE = 1000;
const cache = new Map();
export const icu = {
  isICU(message) {
    return ICU_PATTERN.test(message);
  },
  format(message, values, locale) {
    const cacheKey = `${locale}::${message}`;
    let formatter = cache.get(cacheKey);
    if (!formatter) {
      formatter = new IntlMessageFormat(message, locale);
      if (cache.size >= MAX_CACHE_SIZE) {
        cache.delete(cache.keys().next().value);
      }
      cache.set(cacheKey, formatter);
    }
    const result = formatter.format(values);
    if (typeof result === 'string') {
      return result;
    }
    if (Array.isArray(result)) {
      if (result.every(part => typeof part === 'string')) {
        return result.join('');
      }
      return result;
    }
    return String(result);
  }
};
export default icu;
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