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());
}
/// <summary>
/// Invoker setting and Executing Command
/// </summary>
/// <param name="command"></param>
private static void InvokerExecuteCommand(CommandInvoker invoker, Command command)
{
invoker.SetCommand(command);
invoker.ExecuteCommand();
}