private static bool Equals(AmountSigned left, AmountSigned right)
{
if (left is null && right is null)
{
return(true);
}
if (left?.GetType() != right?.GetType())
{
return(false);
}
if (left.GetType() != typeof(AmountSigned) || right.GetType() != typeof(AmountSigned))
{
return(false);
}
return(left.ToString().Equals(right.ToString()));
}
private AmountSigned ConvertTo(AmountSigned amountSigned, string convertTo)
{
// Контроль типов: нельзя конвертировать валюту в саму себя
if (amountSigned.Amount.Currency == convertTo)
{
return(amountSigned);
}
var cost = _conversionsCost[amountSigned.Amount.Currency][convertTo];
return(new AmountSigned
{
Sign = amountSigned.Sign,
Amount = new Amount
{
Currency = convertTo,
Value = amountSigned.Amount.Value * cost
}
});
}
public override object VisitExpression(CurrencyComputerParser.ExpressionContext context)
{
var amounts = context.amountComposite();
var left = (AmountSigned)VisitAmountComposite(amounts[0]);
var leftConverted = ConvertTo(left, _targetCurrency);
if (leftConverted != left)
{
_logger?.LogDebug("{OperationNumber}:Converted from {Source} to {Dest}.", _operationsLogger++, left, leftConverted);
}
var right = amounts.Length == 2
? (AmountSigned)VisitAmountComposite(amounts[1])
: (AmountSigned)VisitExpression(context.expression());
var rightConverted = ConvertTo(right, _targetCurrency);
if (rightConverted != right)
{
_logger?.LogDebug("{OperationNumber}:Converted from {Source} to {Dest}.", _operationsLogger++, right, rightConverted);
}
var operationKey = $"{leftConverted.Sign}{rightConverted.Sign}";
var resultComputed = Operations[operationKey](leftConverted.Amount.Value, rightConverted.Amount.Value);
var result = new AmountSigned
{
Sign = resultComputed < 0
? "-"
: "+",
Amount = new Amount
{
Currency = _targetCurrency,
Value = Math.Abs(resultComputed)
}
};
_logger?.LogDebug("{OperationNumber}:Result {Result} from left {Left} and right {Right} tokens.", _operationsLogger++, result, leftConverted, rightConverted);
return(result);
}