NPC that exchanges tibia gold for tibia coins

[Faeyren]

NPC Will sell 1 tibia coin for 1250 gold. Ratio is adjustable at the top.

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)
local count = {}
local transfer = {}
local ratio = 1250
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 function creatureSayCallback(cid, type, msg)


    if not npcHandler:isFocused(cid) then
        return false
    end


    local player = Player(cid)


if msgcontains(msg, "balance") then
    npcHandler:say('Your balance is ' .. player:getCoinsBalance() .. ' tibia coins.', cid)


    elseif msgcontains(msg, "purchase") or msgcontains(msg, "exchange") or msgcontains(msg, "tibia coins")then
    count[cid] = player:getBankBalance()
        if count[cid] < 1 then
            npcHandler:say('You need to have gold in your bank to {exchange} currency.', cid)
            npcHandler.topic[cid] = 0
            return false
        end
        
            if string.match(msg,'%d+') then
                count[cid] = getMoneyCount(msg)
                if count[cid] < 1 then
                    npcHandler:say('You do not have enough money {in your bank} to make this exchange.', cid)
                    npcHandler.topic[cid] = 0
                    return false
                end
                amount = getMoneyCount(msg)
                cost = amount * ratio
                npcHandler:say('Would you really like to purchase ' .. count[cid] .. ' tibia coins for ' .. cost .. ' gold coins?', cid)
                npcHandler.topic[cid] = 2
                return true
            else
                npcHandler:say('How many tibia coins would you like to purchase?', cid)
                npcHandler.topic[cid] = 1
                return true
            end


        if not isValidMoney(count[cid]) then
            npcHandler:say('I\'m sorry. I can\'t do that.', cid)
            npcHandler.topic[cid] = 0
            return false
        end
    elseif npcHandler.topic[cid] == 1 then
        count[cid] = getMoneyCount(msg)
        amount = getMoneyCount(msg)
        cost = amount * ratio
    
        if isValidMoney(count[cid]) then
                npcHandler:say('Would you really like to purchase ' .. count[cid] .. ' tibia coins for ' .. cost .. ' gold coins?', cid)
                npcHandler.topic[cid] = 2
            return true
        else
            npcHandler:say('You do not have enough money {in your bank} to make this exchange.', cid)
            npcHandler.topic[cid] = 0
            return true
        end
    elseif npcHandler.topic[cid] == 2 then
        if msgcontains(msg, 'yes') then


            if not player:removeMoneyNpc(cost) then
                npcHandler:say('You do not have enough money {in your bank} to make this exchange.', cid)
                npcHandler.topic[cid] = 0
                return true
            end
            if player:setCoinsBalance(player:getCoinsBalance() + amount) then
                npcHandler:say('Alright, we have added the ' .. count[cid] .. ' tibia coins to your {balance}.', cid)
            else
                npcHandler:say('You do not have enough money {in your bank} to make this exchange.', cid)
            end
        elseif msgcontains(msg, 'no') then
            npcHandler:say('Is there something else I can do for you?', cid)
        end
        npcHandler.topic[cid] = 0
    return true
    end
end




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