/**
* Ensure the given code is a known valid code
*
* @param string|Currency|Money $code
* @return string Normalized code
* @throws Exception\InvalidArgumentException
* @throws Exception\UnknownCurrencyException
*/
protected function assertValidCode($code)
{
if ($code instanceof Money) {
$code = $code->getCurrency();
}
if ($code instanceof Currency) {
return (string) $code;
}
if (!is_string($code)) {
throw new Exception\InvalidArgumentException(sprintf('Currency code should be a string; %s given', gettype($code)));
}
$code = trim(strtoupper($code));
if (!Currencies::exists($code)) {
throw new Exception\UnknownCurrencyException(sprintf('%s is not a valid ISO 4217 Currency code', $code));
}
return $code;
}
/**
* __construct
*
* @param string $code
* @param string $locale
*
* @throws Exception\UnexpectedValueException
* @throws Exception\InvalidArgumentException
*/
public function __construct($code = null, $locale = null)
{
if (null === $code) {
$formatter = new NumberFormatter((string) $locale ?: Locale::getDefault(), NumberFormatter::CURRENCY);
$code = $formatter->getSymbol(NumberFormatter::INTL_CURRENCY_SYMBOL);
}
if (!is_string($code)) {
throw new Exception\UnexpectedValueException('Currency code should be a string');
}
if (!Currencies::exists($code)) {
throw new Exception\InvalidArgumentException('Currency with "' . $code . '" code does not exist!');
}
$this->id = strtolower($code);
$this->fromArray(Currencies::getSpecification($this->id));
}