Method transform

packages/common/src/pipes/i18n_plural_pipe.ts:46–60

* @param value the number to be formatted * @param pluralMap an object that mimics the ICU format, see * https://unicode-org.github.io/icu/userguide/format_parse/messages/. * @param locale a `string` defining the locale to use (uses the current LOCALE_ID by * default).

(
    value: number | null | undefined,
    pluralMap: {[count: string]: string},
    locale?: string,
  )

   * default).
   */
  transform(
    value: number | null | undefined,
    pluralMap: {[count: string]: string},
    locale?: string,
  ): string {
    if (value == null) return '';

    if (typeof pluralMap !== 'object' || pluralMap === null) {
      throw invalidPipeArgumentError(I18nPluralPipe, pluralMap);
    }

    const key = getPluralCategory(value, Object.keys(pluralMap), this._localization, locale);

    return pluralMap[key].replace(_INTERPOLATION_REGEXP, value.toString());
  }
}