Zazama / node-id3

/**

 * Language codes are

 * [ISO 639-2](https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes)

 * and must be a 3 character string.

 *

 * This function could also be potentially be used to validate that the given

 * code is a known code.

 *

 * @param languageCode The language code to be validated.

 * @returns Returns the given language code if valid otherwise throws.

 */

export function validateLanguageCode(languageCode: string) {

    if (languageCode.length !== 3) {

        throw new RangeError(

            "Language string length must be 3, see ISO 639-2 codes"

        )

    }

    return languageCode

}

/**

 * Currency codes are

 * [ISO-4217](https://en.wikipedia.org/wiki/ISO_4217)

 *

 * @param currencyCode The currency code to be validated.

 * @returns Returns the given currency code if valid otherwise throws.

 */

export function validateCurrencyCode(currencyCode: string) {

    if (currencyCode.length !== 3) {

        throw new RangeError(

            "Currency string length must be 3, see "

        )

    }

    return currencyCode

}