【数据存储】礼包拆分领取记录：分次领取的状态持久化设计

local GIFT = { "金创药", "魔法药", "祝福油", "随机传送卷", "回城卷" }
local function claimSlot(actor, giftId, slot)
    local player = class(actor)
    local state = tonumber(getplayvar(actor, 2, "GIFT_" .. giftId) or "0")
    local bit = 2 ^ (slot - 1)
    if math.floor(state / bit) % 2 == 1 then
        sendmsg(actor, 0, "该件已领取过")
        return
    end
    giveitem(actor, GIFT[slot], 1)
    setplayvar(actor, "HUMAN", "GIFT_" .. giftId, state + bit, 1)
end

local function checkComplete(actor, giftId, state)
    local full = 2 ^ #GIFT - 1
    if state == full then
        setplayvar(actor, "HUMAN", "GIFT_" .. giftId, 0, 1)
        setplayvar(actor, "HUMAN", "GIFT_DONE_" .. giftId, 1, 1)
        sendmail(actor, 0, "礼包领完奖励", "全部领完的额外回馈", "绑定元宝|50")
    end
end