public static CommandEntity GetCommand(
string commandLine
)
{
string cleanedString = System.Text.RegularExpressions.Regex.Replace(commandLine.Trim(), @"\s+", " ");
string[] split = cleanedString.Split(' ');
int paramcount = split.Length - 1;
string[] parameters = new string[paramcount];
Array.Copy(split, 1, parameters, 0, paramcount);
switch (split[0].ToUpper())
{
case "Q":
return(QuitCommand.CreateCommand(parameters));
case "C":
return(CanvasCommand.CreateCommand(parameters));
case "L":
return(LineCommand.CreateCommand(parameters));
case "R":
return(RectangleCommand.CreateCommand(parameters));
case "B":
return(BucketCommand.CreateCommand(parameters));
default:
string helpMessage = HelpCommand.CreateCommand().Message;
throw new InvalidCommandException("Unknown command \n" + helpMessage);
}
}
internal static BucketCommand CreateCommand(
string[] parameters
)
{
// Validate Mandatory
if (parameters.Length != 3)
{
throw new InvalidCommandParamsException("Expected 3 parameters but received " + parameters.Length + "\n" + GetHelp());
}
int xPos = -1;
int yPos = -1;
try
{
xPos = Utils.FormatPositiveInt(parameters[0]);
}
catch (Exception ex)
{
throw new InvalidCommandParamsException("Invalid x position: " + parameters[0] + ".\n" + GetHelp(), ex);
}
try
{
yPos = Utils.FormatPositiveInt(parameters[1]);
}
catch (Exception ex)
{
throw new InvalidCommandParamsException("Invalid y position: " + parameters[1] + ".\n" + GetHelp(), ex);
}
char[] cArray = parameters[2].ToCharArray();
if (cArray.Length > 1)
{
throw new InvalidCommandParamsException("Expected fill charcter parameter to be a single letter. Received: " + parameters[2] + "\n" + GetHelp());
}
BucketCommand command = new BucketCommand(
xPos,
yPos,
cArray[0]
);
return(command);
}
