therrax
Member
- Joined
- Jul 12, 2012
- Messages
- 262
- Solutions
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Hi, Ihave tfs 1.0
How I can fix that?
scripts:
keywordhandler:
How I can fix that?
Code:
Lua Script Error: [Npc interface]
data/npc/scripts/hermes.lua:onCreatureSay
data/npc/scripts/hermes.lua:23: attempt to call global 'getItemNameById' (a nil
value)
stack traceback:
[C]: in function 'getItemNameById'
data/npc/scripts/hermes.lua:23: in function 'callback'
data/npc/lib/npcsystem/keywordhandler.lua:26: in function 'processMessag
e'
data/npc/lib/npcsystem/keywordhandler.lua:134: in function 'processNodeM
essage'
data/npc/lib/npcsystem/keywordhandler.lua:109: in function 'processMessa
ge'
data/npc/lib/npcsystem/npchandler.lua:390: in function 'onCreatureSay'
data/npc/scripts/hermes.lua:8: in function <data/npc/scripts/hermes.lua:
8>keywordhandler:
Code:
-- Advanced NPC System by Jiddo
if(KeywordHandler == nil) then
KeywordNode = {
keywords = nil,
callback = nil,
parameters = nil,
children = nil,
parent = nil
}
-- Created a new keywordnode with the given keywords, callback function and parameters and without any childNodes.
function KeywordNode:new(keys, func, param)
local obj = {}
obj.keywords = keys
obj.callback = func
obj.parameters = param
obj.children = {}
setmetatable(obj, self)
self.__index = self
return obj
end
-- Calls the underlying callback function if it is not nil.
function KeywordNode:processMessage(cid, message)
return (self.callback == nil or self.callback(cid, message, self.keywords, self.parameters, self))
end
-- Returns true if message contains all patterns/strings found in keywords.
function KeywordNode:checkMessage(message)
local ret = true
if(self.keywords.callback ~= nil) then
return self.keywords.callback(self.keywords, message)
end
for i, v in ipairs(self.keywords) do
if(type(v) == 'string') then
local a, b = string.find(message, v)
if(a == nil or b == nil) then
ret = false
break
end
end
end
return ret
end
-- Returns the parent of this node or nil if no such node exists.
function KeywordNode:getParent()
return self.parent
end
-- Returns an array of the callback function parameters assosiated with this node.
function KeywordNode:getParameters()
return self.parameters
end
-- Returns an array of the triggering keywords assosiated with this node.
function KeywordNode:getKeywords()
return self.keywords
end
-- Adds a childNode to this node. Creates the childNode based on the parameters (k = keywords, c = callback, p = parameters)
function KeywordNode:addChildKeyword(keywords, callback, parameters)
local new = KeywordNode:new(keywords, callback, parameters)
return self:addChildKeywordNode(new)
end
-- Adds a pre-created childNode to this node. Should be used for example if several nodes should have a common child.
function KeywordNode:addChildKeywordNode(childNode)
table.insert(self.children, childNode)
childNode.parent = self
return childNode
end
KeywordHandler = {
root = nil,
lastNode = nil
}
-- Creates a new keywordhandler with an empty rootnode.
function KeywordHandler:new()
local obj = {}
obj.root = KeywordNode:new(nil, nil, nil)
setmetatable(obj, self)
self.__index = self
return obj
end
-- Resets the lastNode field, and this resetting the current position in the node hierarchy to root.
function KeywordHandler:reset()
self.lastNode = nil
end
-- Makes sure the correct childNode of lastNode gets a chance to process the message.
function KeywordHandler:processMessage(cid, message)
local node = self:getLastNode()
if(node == nil) then
error('No root node found.')
return false
end
local ret = self:processNodeMessage(node, cid, message)
if(ret) then
return true
end
if node:getParent() then
node = node:getParent() -- Search through the parent.
local ret = self:processNodeMessage(node, cid, message)
if(ret) then
return true
end
end
if(node ~= self:getRoot()) then
node = self:getRoot() -- Search through the root.
local ret = self:processNodeMessage(node, cid, message)
if(ret) then
return true
end
end
return false
end
-- Tries to process the given message using the node parameter's children and calls the node's callback function if found.
-- Returns the childNode which processed the message or nil if no such node was found.
function KeywordHandler:processNodeMessage(node, cid, message)
local messageLower = string.lower(message)
for i, childNode in pairs(node.children) do
if(childNode:checkMessage(messageLower)) then
local oldLast = self.lastNode
self.lastNode = childNode
childNode.parent = node -- Make sure node is the parent of childNode (as one node can be parent to several nodes).
if(childNode:processMessage(cid, message)) then
return true
else
self.lastNode = oldLast
end
end
end
return false
end
-- Returns the root keywordnode
function KeywordHandler:getRoot()
return self.root
end
-- Returns the last processed keywordnode or root if no last node is found.
function KeywordHandler:getLastNode()
return self.lastNode or self:getRoot()
end
-- Adds a new keyword to the root keywordnode. Returns the new node.
function KeywordHandler:addKeyword(keys, callback, parameters)
return self:getRoot():addChildKeyword(keys, callback, parameters)
end
-- Moves the current position in the keyword hierarchy count steps upwards. Count defalut value = 1.
-- This function MIGHT not work properly yet. Use at your own risk.
function KeywordHandler:moveUp(count)
local steps = count
if(steps == nil) then
steps = 1
end
for i = 1, steps,1 do
if(self.lastNode == nil) then
break
else
self.lastNode = self.lastNode:getParent() or self:getRoot()
end
end
return self.lastNode
end
end
