public void Navigate(Models.Rover rover)
{
Position finalPosition = new Position();
char[] instructions = rover.Instructions.ToCharArray();
foreach (var instruction in instructions)
{
ProcessInstruction(rover, Char.ToUpper(instruction));
}
}
private bool CheckRoverPositionAllowed(Models.Rover rover)
{
if (_roverModel.PlateauSizeLongitude <= rover.Position.Longitude)
{
throw new Exception(string.Format("Rover Longitude ({0}) is out of plateau (max {1})"
, rover.Position.Longitude.ToString()
, _roverModel.PlateauSizeLongitude - 1));
}
if (_roverModel.PlateauSizeLatitude <= rover.Position.Latitude)
{
throw new Exception(string.Format("Rover Latitude ({0}) is out of plateau (max {1})"
, rover.Position.Longitude.ToString()
, _roverModel.PlateauSizeLatitude - 1));
}
return(true);
}
private void ProcessInstruction(Models.Rover rover, char instruction)
{
Heading heading;
heading = ConvertToHeading(instruction);
switch (heading)
{
case Heading.M:
Move(rover);
if (!CheckRoverPositionAllowed(rover))
{
throw new Exception("The Rover has moved out of the plateau");
}
break;
default:
rover.Position.Heading = heading;
break;
}
}
private void Move(Models.Rover rover)
{
switch (rover.Position.Heading)
{
case Heading.N:
rover.Position.Latitude++;
break;
case Heading.E:
rover.Position.Longitude++;
break;
case Heading.S:
rover.Position.Latitude--;
break;
case Heading.W:
rover.Position.Longitude--;
break;
default:
throw new Exception("The current heading does not exist");
}
}
