private bool EvaluateTopicConditions(Stack <ConditionToken> conditions)
{
bool finalResult = false;
if (conditions.Count <= 0)
{
return(true);
}
//TODO evaluate RPN
Stack <bool> values = new Stack <bool>();
while (conditions.Count > 0)
{
ConditionToken token = conditions.Pop();
if (token.IsOperator)
{
//Debug.Log("operator : " + ((DialogueConditionOperator)token).Op);
//pop two values from values and calculate
DialogueConditionOperator op = (DialogueConditionOperator)token;
bool value1, value2;
try
{
value1 = values.Pop();
value2 = values.Pop();
}
catch (Exception e)
{
//Debug.Log("pop failed");
return(false);
}
if (op.Op == LogicOperator.And)
{
values.Push(value1 && value2);
}
else if (op.Op == LogicOperator.Or)
{
values.Push(value1 || value2);
}
}
else
{
//Debug.Log("condition : " + ((DialogueCondition)token).ID);
//evaluate and then push into values
bool result = EvaluateCondition((DialogueCondition)token);
values.Push(result);
}
}
if (values.Count != 1)
{
//Debug.Log("there are not 1 value left in values");
return(false);
}
else
{
return(values.Pop());
}
}
private void GetTokens(XmlNode nodeItem, Stack <ConditionToken> theStack)
{
if (nodeItem.Name == "condition")
{
XmlAttributeCollection attributes = nodeItem.Attributes;
Debug.Log("found condition " + attributes["story"].Value);
DialogueCondition condition = new DialogueCondition();
condition.ID = attributes["name"].Value;
if (condition.ID.Length > 0)
{
if (attributes["story"] != null)
{
condition.StoryTriggerID = attributes["story"].Value;
}
if (attributes["compare"] != null)
{
condition.StoryTriggerCompare = Convert.ToInt32(attributes["compare"].Value);
}
if (attributes["op"] != null)
{
condition.StoryTriggerCompareOp = Convert.ToInt32(attributes["op"].Value);
}
theStack.Push(condition);
}
}
else if (nodeItem.Name == "logic")
{
DialogueConditionOperator op = new DialogueConditionOperator();
XmlAttributeCollection attributes = nodeItem.Attributes;
op.Op = (LogicOperator)Enum.Parse(typeof(LogicOperator), attributes["type"].Value);
theStack.Push(op);
XmlNodeList nodeContent = nodeItem.ChildNodes;
if (nodeContent.Count > 0)
{
foreach (XmlNode child in nodeContent)
{
Debug.Log("Found logic child");
GetTokens(child, theStack);
}
}
}
}