/// Uses the provided price guides to compute the price according to the formula.
/// <param name="priceGuides">Row from the priceGuides table containing guides for the card for which to evaluate this formula.
/// If this formula UsesPriceGuides, must be set to contain all the columns, otherwise exception is thrown.</param>
/// <param name="currentPrice">Our current sale price of the card (can be used as a guide).</param>
/// <returns>The final price this formula evaluates to. NaN if the necessary guides are not found.</returns>
public double Evaluate(DataRow priceGuides, double currentPriceSingle)
{
double term;
foreach (var guideTerm in guidesToResolve)
{
if (guideTerm.Value == "CURRENT")
{
term = currentPriceSingle;
}
else
{
term = MKMHelpers.ConvertDoubleAnySep(priceGuides[guideTerm.Value].ToString());
}
if (double.IsNaN(term))
{
return(term);
}
operands[guideTerm.Key] = term;
}
double val = operands[0];
for (int i = 0; i < operators.Count; i++)
{
val = operators[i](val, operands[i + 1]);
}
return(val);
}
/// Converts the operand to number or price guide and stores it
/// <param name="operand">Trimmed string representation of the operand.</param>
/// <returns>False if the parsing failed.</returns>
private bool parseAndAddOperand(string operand)
{
double number = MKMHelpers.ConvertDoubleAnySep(operand);
if (double.IsNaN(number))
{
foreach (var guide in MKMHelpers.PriceGuides)
{
if (guide.Value.Code == operand)
{
guidesToResolve.Add(new KeyValuePair <int, string>(operands.Count, operand));
operands.Add(-9999);
return(true);
}
}
}
else
{
operands.Add(number);
return(true);
}
return(false);
}