public IEnumerable <CalcOperation> Order()
{
var calcSequences = new Dictionary <EGroupType, List <CalcOperation> >();
CalcOperation prevCalc = null;
int sequencePlusOrMinusCount = 0;
foreach (var calc in _calcs)
{
if (calc.Operation == CalcOperation.EOperation.Multiply || calc.Operation == CalcOperation.EOperation.Divide)
{
if (prevCalc != null)
{
AddToSequence(calcSequences, EGroupType.MD, prevCalc);
}
AddToSequence(calcSequences, EGroupType.MD, calc);
prevCalc = null;
sequencePlusOrMinusCount = 0;
continue;
}
else
{
if (sequencePlusOrMinusCount > 0)
{
AddToSequence(calcSequences, EGroupType.PM, prevCalc);
}
sequencePlusOrMinusCount++;
}
prevCalc = calc;
}
if (prevCalc != null)
{
AddToSequence(calcSequences, EGroupType.PM, prevCalc);
}
var result = calcSequences.OrderBy(x => x.Key).SelectMany(x => x.Value).ToArray();
return(result);
}
private void AddToSequence(Dictionary <EGroupType, List <CalcOperation> > calcSequences, EGroupType groupType, CalcOperation calc)
{
if (!calcSequences.ContainsKey(groupType))
{
calcSequences.Add(groupType, new List <CalcOperation>());
}
calcSequences[groupType].Add(calc);
}