Lua NPC CHANGE ITEM. tfs 1.3

[EduardoQuintela]

Hello community,
I want to add in my script that npc only perform the change if the player has any of the specified vocations.

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)
local talkState = {}
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
local c = {
   ["item1"] = {
     id = 0,
     items = {    {id = 7896, count = 1}    }
   },
   ["item2"] = {
     id = 7888,
     items = {    {id = 2132, count = 1}    }
   },
   ["item3"] = {
     id = 7896,
     items = {
       {id = 2131, count = 1}   }
   },
   ["item4"] = {
     id = 7902,
     items = { {id = 2130, count = 1}   }
   },
   ["item5"] = {
     id = 7890,
     items = { {id = 2129, count = 1}   }
   },
   ["item6"] = {
     id = 7903,
     items = { {id = 2133, count = 1}   }
   }  
}
local function getItemsFromTable(itemtable)
     local text = ""
     for v = 1, #itemtable do
         count, info = itemtable[v].count, getItemDescriptions(itemtable[v].id)
         local ret = ", "
         if v == 1 then
             ret = ""
         elseif v == #itemtable then
             ret = " and "
         end
         text = text .. ret
         text = text .. (count > 1 and count or info.article).." "..(count > 1 and info.plural or info.name)
     end
     return text
end
  
function creatureSayCallback(cid, type, msg)
     if(not npcHandler:isFocused(cid)) then
         return false
     end
     local talkUser = NPCHANDLER_CONVBEHAVIOR == CONVERSATION_DEFAULT and 0 or cid
     local player = Player(cid)
     local x = c[msg:lower()]
     if x then
         selfSay("You have "..getItemsFromTable(x.items).."?...", cid)
         talkState[talkUser] = 1
         xmsg = msg
     elseif msgcontains(msg, "yes") and talkState[talkUser] == 1 then
         x = c[xmsg:lower()]
         local n = 0
         for z = 1, #x.items do
             if player:getItemCount(x.items[z].id) >= x.items[z].count then
                 n = n + 1
             end
         end
         if n == #x.items then
             for r = 1, #x.items do
                 player:removeItem(x.items[r].id, x.items[r].count)
             end
             player:addItem(x.id, 1)
         else
             selfSay("You dont have item.", cid)
         end
         talkState[talkUser] = 0
     elseif msgcontains(msg, "no") and talkState[talkUser] == 1 then
         selfSay("Ok.", cid)
         talkState[talkUser] = 0
     end
     return true
end
npcHandler:setCallback(CALLBACK_MESSAGE_DEFAULT, creatureSayCallback)
npcHandler:addModule(FocusModule:new())