public decimal GetResultFromExpression(string sourceExpressions)
{
PartsFinder partsFinder = new PartsFinder(sourceExpressions);
CurrencyParser currencyParser = new CurrencyParser();
var finalCurrency = currencyParser.ParseFinalCurrencyOperation(partsFinder.RightPartWithConversionInfo);
decimal totalResult = GetConvertValueFromPart(partsFinder.CurrenciesWithValues[0], finalCurrency);
for (int i = 0; i < partsFinder.OperatorsList.Count; i++)
{
switch (partsFinder.OperatorsList[i])
{
case Constants.PlusMathOperation:
var convertedValueToPlus = GetConvertValueFromPart(partsFinder.CurrenciesWithValues[i + 1], finalCurrency);
totalResult += convertedValueToPlus;
break;
case Constants.MinusMathOperation:
var convertedValueToMinus = GetConvertValueFromPart(partsFinder.CurrenciesWithValues[i + 1], finalCurrency);
totalResult -= convertedValueToMinus;
break;
}
}
return(System.Math.Round(totalResult, Constants.NumberAfterPoint));
}
private decimal GetConvertValueFromPart(string part, string finalCurrency)
{
CurrencyParser currencyParser = new CurrencyParser();
var currencyWithValue = part;
var partsParser = new PartsParser(currencyWithValue);
var currencyConverter = new CurrencyConverter(_ratesRelations);
var convertedValue = currencyConverter.CalculateTotalValue(partsParser.GetValue(), partsParser.GetCurrency(),
currencyParser.ParseCurrencyConversionOperation(currencyWithValue), finalCurrency);
return(convertedValue);
}