public CalculationResult Calculate(MathParserTermResult[] terms)
{
var result = new CalculationResult();
var onpTerms = ConvertTermsToOnp(terms);
var stack = new Stack <double>();
foreach (var term in onpTerms)
{
ITermResultStrategy strategy = _termResultStrategyFactory.GetStrategy(term.TermType);
var validationResult = strategy.Validate(term);
if (validationResult.IsValid)
{
var subResult = strategy.Execute(term, stack);
stack.Push(subResult);
}
else
{
result.AddErrors(validationResult.Errors);
return(result);
}
}
if (stack.Count > 1 || stack.Count == 0)
{
result.AddError("Expression is not valid math expression!");
return(result);
}
result.Result = stack.Pop();
return(result);
}