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<?php
namespace Money;
/**
* Provides a way to convert Money to Money in another Currency using an exchange rate.
*
* @author Frederik Bosch <f.bosch@genkgo.nl>
*/
final class Converter
{
/**
* @var Currencies
*/
private $currencies;
/**
* @var Exchange
*/
private $exchange;
/**
* @param Currencies $currencies
* @param Exchange $exchange
*/
public function __construct(Currencies $currencies, Exchange $exchange)
{
$this->currencies = $currencies;
$this->exchange = $exchange;
}
/**
* @param Money $money
* @param Currency $counterCurrency
* @param int $roundingMode
*
* @return Money
*/
public function convert(Money $money, Currency $counterCurrency, $roundingMode = Money::ROUND_HALF_UP)
{
$baseCurrency = $money->getCurrency();
$ratio = $this->exchange->quote($baseCurrency, $counterCurrency)->getConversionRatio();
$baseCurrencySubunit = $this->currencies->subunitFor($baseCurrency);
$counterCurrencySubunit = $this->currencies->subunitFor($counterCurrency);
$subunitDifference = $baseCurrencySubunit - $counterCurrencySubunit;
$ratio = (string) Number::fromFloat($ratio)->base10($subunitDifference);
$counterValue = $money->multiply($ratio, $roundingMode);
return new Money($counterValue->getAmount(), $counterCurrency);
}
}