@shopgate/pwa-common/helpers/i18n/getNumberFormatter.js

Common library for the Shopgate Connect PWA.

import IntlMessageFormat from 'intl-messageformat';
import curry from 'lodash/curry';
import messageCache from "./messageCache";

/**
 * Returns an instance of IntlMessageFormat from cache based on a hash.
 * The hash is generated from given language code and translation key.
 * If no instance exists yet, a new instance will be created and returned.
 * @param {string} langCode A language code.
 * @param {number} fractions With or without fraction digits.
 * @returns {IntlMessageFormat}
 */
const getFormattedNumberFromCache = (langCode, fractions) => {
  const hash = `${langCode}_number_fr_${fractions}`;

  // Check if a cached instance already exists.
  if (messageCache[hash]) {
    return messageCache[hash];
  }
  messageCache[hash] = new IntlMessageFormat('{value, number, decimal}', langCode, {
    number: {
      decimal: {
        style: 'decimal',
        minimumFractionDigits: fractions,
        maximumFractionDigits: fractions
      }
    }
  });
  return messageCache[hash];
};

/**
 * Get a formatted number by a language code.
 * @param {string} langCode A language code.
 * @param {number} value The number to format.
 * @param {boolean} fractions Number of digits after dot.
 * @returns {string}
 */
const formatNumber = (langCode, value, fractions) => getFormattedNumberFromCache(langCode, fractions).format({
  value
});
const getNumberFormatter = curry(formatNumber);
export default getNumberFormatter;