Function getPluralCategory

packages/common/src/i18n/localization.ts:34–60

(
  value: number,
  cases: string[],
  ngLocalization: NgLocalization,
  locale?: string,
)

 * - the plural category otherwise
 */
export function getPluralCategory(
  value: number,
  cases: string[],
  ngLocalization: NgLocalization,
  locale?: string,
): string {
  let key = `=${value}`;

  if (cases.indexOf(key) > -1) {
    return key;
  }

  key = ngLocalization.getPluralCategory(value, locale);

  if (cases.indexOf(key) > -1) {
    return key;
  }

  if (cases.indexOf('other') > -1) {
    return 'other';
  }

  throw new RuntimeError(
    RuntimeErrorCode.NO_PLURAL_MESSAGE_FOUND,
    ngDevMode && `No plural message found for value "${value}"`,
  );
}

/**
 * Returns the plural case based on the locale