private CommandLineParserResult HandleExcept(CommandLineParserResult result, TokenizedInput tokens, string currentToken)
{
var index = tokens.IndexOf(currentToken) + 1;
if (index >= tokens.Count)
{
return(null);
}
var except = new List <Object>();
// process rest of the tokens as objects
for (int i = index; i < tokens.Count; i++)
{
// TODO: handle multiple objects with same name
var next = tokens[i];
if (next.IsPreposition() && result.Preposition == null)
{
result.Preposition = Prepositions.Get(next);
continue;
}
var obj = GetObject(result, next);
if (obj == null)
{
result.Error = Messages.CantSeeObject;
return(result);
}
else if (obj is MultipleObjectsFound)
{
var input = GetInput(result.Verb);
if (input.Error.HasValue())
{
return(input);
}
if (input.Objects.Count > 0)
{
except.AddRange(input.Objects);
}
}
else
{
except.Add(obj);
}
}
result.Objects = result.Objects.Where(x => !except.Contains(x)).ToList();
return(null);
}
private CommandLineParserResult Parse(Verb verb, TokenizedInput tokens)
{
var result = new CommandLineParserResult
{
Verb = verb
};
var lastToken = "";
foreach (string token in tokens)
{
var obj = GetObject(result, token);
if (obj is Skip)
{
continue;
}
if (result.Objects.Contains(obj))
{
// will happen for something like "take the brass lamp"
continue;
}
if (obj != null)
{
if (obj.InScope)
{
if (result.Preposition == null || !result.Objects.Any())
{
// handles commands like "put on coat", "put down book", etc.
result.Ordered.Add(obj);
result.Objects.Add(obj);
}
else
{
result.Ordered.Add(obj);
result.IndirectObject = obj;
}
}
else if (obj is MultipleObjectsFound)
{
return(ResolveMultipleObjects(verb, (MultipleObjectsFound)obj));
}
else
{
result.Error = Messages.CantSeeObject;
return(result);
}
}
// distinguish between prepositions and movement - "go south", "put bottle down", "close up grate"
else if ((result.Verb is IDirectionProxy) && token.IsDirection() && !result.Objects.Any())
{
var v = token.ToVerb();
result.Ordered.Add(v);
result.Verb = v;
}
else if (token.IsPreposition())
{
var p = Prepositions.Get(token);
result.Ordered.Add(p);
result.Preposition = p;
}
else if (token == "all" && !result.Objects.Any())
{
result.IsAll = true;
if (!verb.Multi && !verb.MultiHeld)
{
result.Error = Messages.MultiNotAllowed;
break;
}
var multi = new List <Object>();
if (verb.Multi)
{
var objectsInRoom =
from o in CurrentRoom.ObjectsInRoom()
where !o.Animate
select o;
multi.AddRange(objectsInRoom);
}
if (verb.MultiHeld)
{
multi.AddRange(Inventory.Items);
}
// if object count is only 1, we don't add it so it can be handled in the verb using implict
// messages e.g. (the small bottle)
if (multi.Count > 1)
{
result.Objects.AddRange(multi);
}
}
else if (token == "except" && (verb.Multi || verb.MultiHeld) && lastToken == "all")
{
var except = HandleExcept(result, tokens, token);
if (except != null)
{
return(except);
}
break;
}
else
{
obj = result.Objects.FirstOrDefault();
if (obj != null && !result.IsAll)
{
result.Error = Messages.PartialUnderstanding(verb, obj);
}
else
{
result.Error = Messages.CantSeeObject;
}
return(result);
}
lastToken = token;
}
return(result);
}