public static Rover Create(int startPositionX, int startPostionY, LandscapeGrid landScapeGrid)
{
if (_rover == null)
{
_rover = new Rover(startPositionX, startPostionY, landScapeGrid);
}
return(_rover);
}
//Constructor with paramenters and default value
public static LandscapeGrid Create(int minCordinateX = 0, int minCordinateY = 0, int maxCordinateX = 4, int maxCordinateY = 4)
{
if (_landscapeGrid == null)
{
_landscapeGrid = new LandscapeGrid();
}
_landscapeGrid.minCordinateX = minCordinateX;
_landscapeGrid.minCordinateY = minCordinateY;
_landscapeGrid.maxCordinateX = maxCordinateX;
_landscapeGrid.maxCordinateY = maxCordinateY;
return(_landscapeGrid);
}
public String Execute(string inputCommand)
{
//Read and parse command to char array
char[] parsedCommand = inputCommand.ToUpper().ToCharArray();
//Creating Rover, command and comman Invoker
LandscapeGrid landScapeGrid = LandscapeGrid.Create(0, 0, 4, 4); //Create Singleton landScape for Rover to walk on
Rover rover = Rover.Create(0, 0, landScapeGrid); //Create Singleton Rover and pass Land Scape Grid to walk over
Command command;
CommandInvoker invoker = new CommandInvoker(); //Invoker of command pattern to invoke command
//Rover is on a Walk
Console.WriteLine("Ahan! Rover is walking now..." + Environment.NewLine);
for (int i = 0; i < parsedCommand.Length; i++)
{
switch (parsedCommand[i])
{
case 'R':
command = new RotateRightCommand(rover); //Set appropiate command
InvokerExecuteCommand(invoker, command); //Set and execute command on invoker
break;
case 'L':
command = new RotateLeftCommand(rover); //Set appropiate command
InvokerExecuteCommand(invoker, command); //Set and execute command on invoker
break;
case 'F':
command = new MoveForwardCommand(rover); //Set appropiate command
InvokerExecuteCommand(invoker, command); //Set and execute command on invoker
break;
//Case 'B': for application extension to move rover to backword
}
}
return(rover.roverCurrentPosition.ToString());
}
private Rover(int x, int y, LandscapeGrid landScapeGrid)
{
roverCurrentPosition = new structRoverCurrentPostion(0, 0, landScapeGrid.minCordinateX, landScapeGrid.minCordinateY, landScapeGrid.maxCordinateX, landScapeGrid.maxCordinateY);
}