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<?php
declare(strict_types=1);
namespace Money\Parser;
use Money\Currencies\BitcoinCurrencies;
use Money\Currency;
use Money\Exception\ParserException;
use Money\Money;
use Money\MoneyParser;
use function ltrim;
use function rtrim;
use function str_pad;
use function str_replace;
use function strlen;
use function strpos;
use function substr;
/**
* Parses Bitcoin currency to Money.
*/
final class BitcoinMoneyParser implements MoneyParser
{
private int $fractionDigits;
public function __construct(int $fractionDigits)
{
$this->fractionDigits = $fractionDigits;
}
public function parse(string $money, Currency|null $fallbackCurrency = null): Money
{
if (strpos($money, BitcoinCurrencies::SYMBOL) === false) {
throw new ParserException('Value cannot be parsed as Bitcoin');
}
$currency = $fallbackCurrency ?? new Currency(BitcoinCurrencies::CODE);
$decimal = str_replace(BitcoinCurrencies::SYMBOL, '', $money);
$decimalSeparator = strpos($decimal, '.');
if ($decimalSeparator !== false) {
$decimal = rtrim($decimal, '0');
$lengthDecimal = strlen($decimal);
$decimal = str_replace('.', '', $decimal);
$decimal .= str_pad('', ($lengthDecimal - $decimalSeparator - $this->fractionDigits - 1) * -1, '0');
} else {
$decimal .= str_pad('', $this->fractionDigits, '0');
}
if (substr($decimal, 0, 1) === '-') {
$decimal = '-' . ltrim(substr($decimal, 1), '0');
} else {
$decimal = ltrim($decimal, '0');
}
if ($decimal === '') {
$decimal = '0';
}
/** @psalm-var numeric-string $decimal */
return new Money($decimal, $currency);
}
}