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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); } }