/// <summary>
/// Determine the type of each of the source elements and fill the tokens collection
/// </summary>
/// <param name="elements">Array of split elements</param>
void Tokenise(string[] elements)
{
tokens = new List <Token>(elements.Length);
int position = 0;
foreach (string el in elements)
{
// ensure the word is in lower case and has no space
string element = el.ToLower().Trim();
if (String.IsNullOrWhiteSpace(element))
{
continue;
}
if (WordStore.IsIgnored(element))
{
// token added as an ignored word
tokens.Add(new Token(element, TokenType.Ignored, position));
IgnoreCount++;
}
else
{
// this is a preposition
if (WordStore.IsPreposition(element))
{
tokens.Add(new Token(element, TokenType.Preposition, position));
}
// this is a direction
else if (WordStore.IsDirection(element))
{
tokens.Add(new Token(element, TokenType.Direction, position));
}
// this is a command, but only accept the first command found
else if (CommandManager.IsCommand(element, position) && Command == default(Token))
{
Command = new Token(element, TokenType.Command, position);
tokens.Add(Command);
}
else
{
tokens.Add(new Token(element, TokenType.Unrecognised, position));
}
}
position++; // TODO: these two vars could be consolidated, but does it look stupid passing WordCount as position?
WordCount++;
}
elements = null;
}
protected override Response ProcessInternal(Engine engine, Tokeniser tokens)
{
var directionWord = tokens.Direction;
if (directionWord == null || !WordStore.IsDirection(directionWord))
{
return(new Response("Go where?"));
}
var direction = WordStore.GetDirection(directionWord);
var ego = engine.GameState.Ego;
var response = new Response();
Room newRoom;
if (direction == Direction.Back)
{
if (ego.PreviousRoom != null)
{
newRoom = ego.PreviousRoom;
}
else
{
return(new Response("You've not been anywhere yet!"));
}
}
else
{
newRoom = ego.CurrentRoom.GetNextRoom(direction);
}
if (newRoom == null)
{
return(new Response("You try to walk " + directionWord + ", but realise how bad a mistake that wasa when you walk straight into a solid wall. Your nose will hurt for days."));
}
if (!newRoom.IsAccessible)
{
response.AddMessage("You try, but find that the door is locked.");
}
else
{
ego.MoveTo(newRoom);
response.AddMessage(newRoom.Describe());
}
response.Merge(engine.RunOccurrences(new GoRoom.Trigger(newRoom)));
return(response);
}
