--[[ Quest system
Fácil configuração para você criar suas quest, muito simples
Author : Skymagnum or Skyforever
Contact : TibiaKing.com / Xtibia.com

ENJOY IT!
]]--

function CompleteQuest(player, configuration)

    if getPlayerStorageValue(player, configuration.storage) > 0 then
        doSendMagicEffect(getThingPos(player), configuration.failEff)
        return doPlayerSendTextMessage(cid, 25, "You already complete this quest.")
    end

    local item = nil

    for _, T in pairs(configuration.items) do
        if getPlayerFreeCap(player) < (getItemWeight(T[1]) * T[2]) then
            item = doPlayerAddItem(player, T[1], T[2])
            doSendMagicEffect(getThingPos(player), configuration.completeEff)
        else
            item = doCreateItemEx(T[1], T[2])
            doPlayerSendMailByName(getCreatureName(player), item)
            doSendMagicEffect(getThingPos(player), configuration.depotEff)
            doPlayerSendTextMessage(cid, 22, "You don't have capacity, item send to depot.")
        end
    end
end

In your quest script you take it:
function onUse(cid, item, fromPosition, itemEx, toPosition)

    return CompleteQuest(cid, config)
end

where config is:
local config = {
    storage = 329302,
    failEff = 9,
    items = {{2160, 10}, {2159, 30}},
    completeEff = 28,
    depotEff = 30,
}