private FloorRequest GetNextRequestBelow()
{
FloorRequest nextRequestBelow = FloorsBelowCurrent(_downDirectionQueue)?.FirstOrDefault();
if (null == nextRequestBelow)
{
FloorRequest lowestUpRequest = _upDirectionQueue.Peek();
nextRequestBelow = (lowestUpRequest?.Floor <= CurrentFloor) ? lowestUpRequest : null;
}
return(nextRequestBelow);
}
private FloorRequest GetNextRequestAbove()
{
var nextRequestAbove = FloorsAboveCurrent(_upDirectionQueue)?.FirstOrDefault();
if (null == nextRequestAbove)
{
FloorRequest highestDownRequest = _downDirectionQueue.Peek();
nextRequestAbove = (highestDownRequest?.Floor >= CurrentFloor) ? highestDownRequest : null;
}
return(nextRequestAbove);
}