public void RequestElevator(FloorRequest request)
{
//if the request is already present in the queue, ignore it
if (!_requestQueue.Any(x => x.From == request.From && x.To == request.To))
{
_requestQueue.Enqueue(request);
}
}
private void HandleRequest(FloorRequest floorRequest)
{
IElevator elevator = GetElevator(floorRequest);
if (elevator != null)
{
elevator.RequestElevator(floorRequest);
}
else
{
//no elevators are avaiable at the moment, put the request back in queue.
RequestElevator(floorRequest);
}
}
public void RequestElevator(FloorRequest req)
{
var stopRequest = StopRequests.Find(sr => sr.FloorNumber == req.To);
if (req.GoingDown)
{
stopRequest.DownRequest = true;
}
if (req.GoingUp)
{
stopRequest.UpRequest = true;
}
if (TargetFloor.FloorNumber == CurrentFloor.FloorNumber)
{
Land();
return;
}
if (IsIdle())
{
TargetFloor = GetFloor(req, CurrentFloor);
if (req.IsGoingDown)
{
GoDown();
}
if (req.IsGoingUp)
{
GoUp();
}
return;
}
//elevator is going down and the current target is greater than 'To',
//new target is 'To'
if (IsGoingDown() && TargetFloor.FloorNumber > req.To)
{
TargetFloor = GetFloor(req, CurrentFloor);
}
//elevator is going up and the current target is smaller than 'To',
//new target is 'To'
if (IsGoingUp() && TargetFloor.FloorNumber < req.To)
{
TargetFloor = GetFloor(req, CurrentFloor);
}
}
private Floor GetFloor(FloorRequest req, Floor floor)
{
if (floor.FloorNumber == req.To)
{
return(floor);
}
if (floor.FloorNumber > req.To)
{
return(GetFloor(req, floor.Lower));
}
else
{
return(GetFloor(req, floor.Upper));
}
}
public void RequestElevator(int from, int to, bool?up = false, bool?down = false)
{
FloorRequest request = new FloorRequest {
From = from, To = to
};
if (up ?? false)
{
request.GoingUp = true;
}
if (down ?? false)
{
request.GoingDown = true;
}
RequestElevator(request);
}
private IElevator GetElevator(FloorRequest floorRequest)
{
//are there any idle elevators on this floor
var idleElevator = _building.Elevators.Find(
x => x.CurrentFloor.FloorNumber == floorRequest.From && x.IsIdle()
);
if (idleElevator != null)
{
return(idleElevator);
}
//get all elevators that are moving in this direction
//and are at requested floor
var sameDirectionalElevators = _building.Elevators.FindAll(x =>
(
x.IsGoingDown() && floorRequest.IsGoingDown
||
x.IsGoingUp() && floorRequest.IsGoingUp
) && x.CurrentFloor.FloorNumber == floorRequest.From
);
//there are elevators travelling in this direction
if (sameDirectionalElevators.Count > 0)
{
//probably we can do some optimization here (like open the least weighing elevator
// , but we need to capture weight of the elevator including the load)
return(sameDirectionalElevators[0]);
}
//if there are any idle elevators, send one of them
idleElevator = _building.Elevators.Find(x => x.IsIdle());
if (idleElevator != null)
{
return(idleElevator);
}
//none of the elevators are ready now, lets wait for next round
return(null);
}
