public CalculationResult ProcessCalculation(string expression)
{
//1. run the evaluation
var processingResult = calculatorProcessor.Calculate(expression);
//2. parse the error if failed
IEnumerable <int> failingIndex = null;
if (processingResult.HasError)
{
failingIndex = ParseErrorForForFailingIndexes(processingResult.Error);
}
//3. construct response
var calculationResult = new CalculationResult
{
Result = processingResult.Result,
IsSuccessfull = !processingResult.HasError,
CalculationError = processingResult.HasError
? new CalculationError
{
ErrorText = processingResult.Error,
Indexes = failingIndex
}
: null
};
var expressionCalculation = new ExpressionCalculation
{
DateGenerated = DateTime.Now,
Expression = expression,
CalculationResult = calculationResult
};
//4. store in history
calculationDataProvider.Save(expressionCalculation);
return(calculationResult);
}
public void Save(ExpressionCalculation expressionCalculation)
{
dataProvider.Save(expressionCalculation);
}