[Request] NPC Item exchanger

[Ecstacy]

Hello,

I would like to request a NPC script which will do the following.

--
It greets with: 
"Welcome traveler, you may exchange your tokens here."

And farewells with:
"Farewell traveler!"
--

It exchanges a vampire token (itemid: 9020) for items,
i.e. for a horned helmet (itemid: 2496).

--

You must have storage [B]11551[/B] or else it will say:
"Sorry, I can not talk to you."

--

Also I would like it to be easy to configure so that I could add more items.

Ofcourse I'll +REP the one who comes with a working script.

I'm using Crying Damson 0.3.6pl1

#EDIT

I got this:

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)

function onCreatureAppear(cid)            npcHandler:onCreatureAppear(cid)            end
function onCreatureDisappear(cid)        npcHandler:onCreatureDisappear(cid)            end
function onCreatureSay(cid, type, msg)    npcHandler:onCreatureSay(cid, type, msg)    end
function onThink()                        npcHandler:onThink()    end

-- CONFIG --
newitem = "Here you go, glad to be doing bussiness with you!"
noitems = "You don't have enough tokens to pay for that."

-- Yalahari Mask --

function YalahariMask(cid, message, keywords, parameters, node)
    if(not npcHandler:isFocused(cid)) then
        return false
		
    end 
	if getPlayerStorageValue(cid, 11551) then
			if getPlayerItemCount(cid, 9020) >= 10 then
					if doPlayerRemoveItem(cid, 9020, 10) then
							selfSay(newitem, cid)
							doPlayerGiveItem(cid, 9778)
					else
							selfSay(noitems, cid)
					end
			else
					selfSay(noitems, cid)
			end
	end
end

but he won't say anything when I greet him.

 

[cronoxhere]

Npc is the tokens
?

example mee

why need?
I dont understand :S

 

[cronoxhere]

Test this

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)

function onCreatureAppear(cid)				npcHandler:onCreatureAppear(cid) end
function onCreatureDisappear(cid) 			npcHandler:onCreatureDisappear(cid) end
function onCreatureSay(cid, type, msg)			npcHandler:onCreatureSay(cid, type, msg) end
function onThink() 					npcHandler:onThink() end

function creatureSayCallback(cid, type, msg)

if(npcHandler.focus ~= cid) then
	return false
end

		playertokens = getPlayerItemCount(cid,9020)

---- example of keyword->respond

		if msgcontains(msg, 'offer') then
			selfSay('I can offer you a plate armor and plate legs for vampire lord tokens.')
		elseif msgcontains(msg, 'tokens') then
			selfSay('Vampire lord tokens are very valuable. Many treasure hunters looks for them.')

---- first item in offer

		elseif msgcontains(msg, 'plate armor') then
				if getPlayerItemCount(cid,9020) >= 5 then
                npcHandler:say('Did you bring me 5 vampire lord tokens to exchange for plate armor?', cid)
					talk_state = 1
				else
                npcHandler:say('I need 5 vampire lord tokens to exchange them to plate armor.', cid)
					talk_state = 0
				end

		elseif msgcontains(msg, 'yes') and talk_state == 1 then
			talk_state = 0
			if getPlayerItemCount(cid,9020) >= 5 then
					if doPlayerTakeItem(cid,9020,5) == 0 then
						selfSay('Here you are.')
						doPlayerAddItem(cid,2463,1)
					end
			else
                npcHandler:say('You haven\'t enough vampire lord tokens!', cid)
			end

---- /first item in offer

---- second item in offer

		elseif msgcontains(msg, 'plate legs') then
				if getPlayerItemCount(cid,9020) >= 5 then
                npcHandler:say('Did you bring me 5 vampire lord tokens to exchange for plate legs?', cid)
					talk_state = 2
				else
                npcHandler:say('I need 5 vampire lord tokens to exchange them to plate legs.', cid)
					talk_state = 0
				end

		elseif msgcontains(msg, 'yes') and talk_state == 2 then
			talk_state = 0
			if getPlayerItemCount(cid,9020) >= 5 then
					if doPlayerTakeItem(cid,9020,5) == 0 then
						selfSay('Here you are.')
						doPlayerAddItem(cid,2647,1)
					end
			else
                npcHandler:say('You haven\'t enough vampire lord tokens!', cid)
			end

---- /second item in offer

---- what happens if player say "no", if you are going to add more items, remember to change "talk_state <= 2"

		elseif msgcontains(msg, 'no') and (talk_state >= 1 and talk_state <= 2) then
			selfSay('Then not.')
			talk_state = 0
		end
	return true
end

npcHandler:setCallback(CALLBACK_MESSAGE_DEFAULT, creatureSayCallback)
npcHandler:addModule(FocusModule:new())

 

[Ecstacy]

I've been already, +REP for trying though