/// <summary>
/// Separate the instructions and arguments from the send argument strings
/// </summary>
/// <param name="command"></param>
/// <param name="args"></param>
/// <returns>string</returns>
public Instruction GetInstruction(string command, ref RobotPosition args)
{
Instruction instruction;
string arguments = "";
string[] separatearguments = command.Split(' ');
if (separatearguments.Length > 1)
{
command = separatearguments[0];
arguments = separatearguments[1];
}
command = command.ToUpper();
if (Enum.TryParse <Instruction>(command, true, out instruction))
{
if (instruction == Instruction.Place)
{
if (!ParsePlaceArguments(arguments, ref args))
{
instruction = Instruction.Invalid;
}
}
}
else
{
instruction = Instruction.Invalid;
}
return(instruction);
}
/// <summary>
/// Parse arguments received with Place Instruction
/// </summary>
/// <param name="argumentString"></param>
/// <param name="args"></param>
/// <returns>bool</returns>
private bool ParsePlaceArguments(string argumentString, ref RobotPosition args)
{
var arguments = argumentString.Split(',');
int x, y;
FacingDirection facingdirection;
if (arguments.Length == 3 && GetCoordinate(arguments[0], out x) &&
GetCoordinate(arguments[1], out y) && GetFacingDirection(arguments[2], out facingdirection))
{
args = new RobotPosition
{
X = x,
Y = y,
FacingDirection = facingdirection,
};
return(true);
}
return(false);
}
/// <summary>
/// Get command from the client and invokes correct instructions to the robot
/// </summary>
/// <param name="command"></param>
/// <returns>string</returns>
public string Command(string command)
{
string response = "";
RobotPosition args = null;
var instruction = GetInstruction(command, ref args);
if (instruction == Instruction.Place)
{
var placeArgs = (RobotPosition)args;
if (_robotInstructions.Place(placeArgs.X, placeArgs.Y, placeArgs.FacingDirection))
{
response = "Robot placed on the table.";
}
else
{
response = _robotInstructions._error;
}
}
else if (instruction == Instruction.Move)
{
if (_robotInstructions.Move())
{
response = "Robot Moved.";
}
else
{
response = _robotInstructions._error;
}
}
else if (instruction == Instruction.Left)
{
if (_robotInstructions.Left())
{
response = "Robot rotated to the left.";
}
else
{
response = _robotInstructions._error;
}
}
else if (instruction == Instruction.Right)
{
if (_robotInstructions.Right())
{
response = "Robot rotated to the Right.";
}
else
{
response = _robotInstructions._error;
}
}
else if (instruction == Instruction.Report)
{
response = _robotInstructions.Report() + "\n";
}
else
{
response = "Invalid command.";
}
return(response);
}