// Important method because additional commands can be supported by including new subclasses of CanvasCommand
public string GetUsage(string newLineChar)
{
StringBuilder usageString = new StringBuilder("");
foreach (char key in _commandList.Keys)
{
CanvasCommand canvasCommand = _commandList[key];
usageString.Append(newLineChar + canvasCommand.Usage);
}
return(usageString.ToString());
}
// Looks for all Classes in the current assembly which inherit from CanvasCommand, instantiates them and adds them to the list of supported commands
public void LoadSupportedCommands()
{
Assembly assembly = Assembly.GetExecutingAssembly();
foreach (Type type in assembly.GetTypes())
{
if (type.IsSubclassOf(typeof(CanvasCommand)))
{
CanvasCommand canvasCommand = (CanvasCommand)Activator.CreateInstance(type);
canvasCommand.SetCanvas(this);
_commandList.Add(canvasCommand.SupportedCommand, canvasCommand);
}
}
}
public void ExecuteCommand(string fullCommand)
{
char mainCommand = char.ToUpper(fullCommand.First <char>());
if (_commandList.ContainsKey(mainCommand))
{
CanvasCommand canvasCommand = _commandList[mainCommand];
canvasCommand.ProcessCommand(fullCommand);
}
else
{
throw new CommandException(fullCommand + " is an unrecognised command.");
}
}