79 lines
2.4 KiB
PHP
79 lines
2.4 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
declare(strict_types=1);
|
||
|
|
|
||
|
|
namespace Money;
|
||
|
|
|
||
|
|
use InvalidArgumentException;
|
||
|
|
|
||
|
|
use function sprintf;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Provides a way to convert Money to Money in another Currency using an exchange rate.
|
||
|
|
*/
|
||
|
|
final class Converter
|
||
|
|
{
|
||
|
|
public function __construct(private readonly Currencies $currencies, private readonly Exchange $exchange)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param Money::ROUND_* $roundingMode
|
||
|
|
*/
|
||
|
|
public function convert(Money $money, Currency $counterCurrency, int $roundingMode = Money::ROUND_HALF_UP): Money
|
||
|
|
{
|
||
|
|
return $this->convertAgainstCurrencyPair(
|
||
|
|
$money,
|
||
|
|
$this->exchange->quote(
|
||
|
|
$money->getCurrency(),
|
||
|
|
$counterCurrency
|
||
|
|
),
|
||
|
|
$roundingMode
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param Money::ROUND_* $roundingMode
|
||
|
|
*
|
||
|
|
* @return array{0: Money, 1: CurrencyPair}
|
||
|
|
*/
|
||
|
|
public function convertAndReturnWithCurrencyPair(Money $money, Currency $counterCurrency, int $roundingMode = Money::ROUND_HALF_UP): array
|
||
|
|
{
|
||
|
|
$pair = $this->exchange->quote(
|
||
|
|
$money->getCurrency(),
|
||
|
|
$counterCurrency
|
||
|
|
);
|
||
|
|
|
||
|
|
return [$this->convertAgainstCurrencyPair($money, $pair, $roundingMode), $pair];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param Money::ROUND_* $roundingMode
|
||
|
|
*/
|
||
|
|
public function convertAgainstCurrencyPair(Money $money, CurrencyPair $currencyPair, int $roundingMode = Money::ROUND_HALF_UP): Money
|
||
|
|
{
|
||
|
|
if (! $money->getCurrency()->equals($currencyPair->getBaseCurrency())) {
|
||
|
|
throw new InvalidArgumentException(
|
||
|
|
sprintf(
|
||
|
|
'Expecting to convert against base currency %s, but got %s instead',
|
||
|
|
$money->getCurrency()->getCode(),
|
||
|
|
$currencyPair->getBaseCurrency()->getCode()
|
||
|
|
)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
$ratio = $currencyPair->getConversionRatio();
|
||
|
|
$baseCurrencySubunit = $this->currencies->subunitFor($currencyPair->getBaseCurrency());
|
||
|
|
$counterCurrencySubunit = $this->currencies->subunitFor($currencyPair->getCounterCurrency());
|
||
|
|
$subunitDifference = $baseCurrencySubunit - $counterCurrencySubunit;
|
||
|
|
|
||
|
|
$ratio = Number::fromString($ratio)
|
||
|
|
->base10($subunitDifference)
|
||
|
|
->__toString();
|
||
|
|
|
||
|
|
$counterValue = $money->multiply($ratio, $roundingMode);
|
||
|
|
|
||
|
|
return new Money($counterValue->getAmount(), $currencyPair->getCounterCurrency());
|
||
|
|
}
|
||
|
|
}
|