//public Table(Int32 Width, Int32 Height) {
// Positions = new Robot[Width, Height];
//}
/// <summary>
/// This will check if the passed robot can move to a given position, and will move it and apply the positions if it can, or will throw an exception.
/// </summary>
/// <param name="robot">The robot that is attempting to move</param>
/// <param name="position">The position the robot is attempting to move to</param>
/// <returns>true, indicating the robot was moved successfully. An exception is thrown otherwise.</returns>
public Boolean Move(Robot robot, TablePosition position)
{
if (position.X < 0 || position.X >= this.Positions.GetLength(0) ||
position.Y < 0 || position.Y >= this.Positions.GetLength(1))
{
return(false);
}
var currentlyThere = this.Positions[position.X, position.Y];
//If the space is not empty, and robot there is not the moving robot, throw an exception
if (currentlyThere != null && currentlyThere != robot)
{
throw new Exception("Position is not empty.");
}
if (robot.Placed == true)
{
//Remove it from its current position
this.Positions[robot.Position.X, robot.Position.Y] = null;
}
currentlyThere = robot;
robot.Position = position;
return(true);
}
public Boolean Move(MoveVector vector)
{
if (this.Placed == false)
{
//Specialise exception to be MoveException etc depending on needs
//Would normally throw exception, in this case, the command will just be ignored
//throw new Exception("The robot has not been placed.");
return(false);
}
var newPosition = new TablePosition {
X = this.Position.X,
Y = this.Position.Y
};
newPosition.X += vector.X;
newPosition.Y += vector.Y;
return(this.Table.Move(this, newPosition));
//Check with the table that the position is valid
}
public String Command(String command)
{
if (command.IndexOf(Commands.Place) == 0)
{
if (command.Length < Commands.Place.Length + 1)
{
throw new Exception("No parameters were passed.");
}
String[] placeParams = command.Substring(Commands.Place.Length + 1).Split(',');
var placePosition = new TablePosition();
if (placeParams.Length < 3)
{
throw new Exception("Not enough parameters. Three parameters are required.");
}
try {
placePosition.X = Int32.Parse(placeParams[0]);
} catch {
throw new Exception(placeParams[0] + " is not a valid number.");
}
try {
placePosition.Y = Int32.Parse(placeParams[1]);
} catch {
throw new Exception(placeParams[1] + " is not a valid number.");
}
var direction = Robot.Directions.FirstOrDefault(d => d.Name == placeParams[2]);
if (direction == null)
{
throw new Exception("Could not find direction " + placeParams[2] + ".");
}
if (this.Table.Move(this, placePosition))
{
this.Placed = true;
this.Direction = direction;
}
}
else if (command == Commands.Move)
{
Move(this.Direction);
}
else if (command == Commands.Left)
{
Turn(-1);
}
else if (command == Commands.Right)
{
Turn(1);
}
else if (command == Commands.Report)
{
if (this.Placed == false)
{
throw new Exception("The robot has not been placed.");
}
return(this.Position.X + "," + this.Position.Y + "," + this.Direction.Name);
}
else
{
//Specialise exception to be CommandException etc depending on needs
throw new UnknownCommandException("Command not recognised.");
}
return("");
}
