【数据存储】NPC 商店：库存管理与限时补货

---NPC 商店：限量商品的购买
function Shop.buy(actor, goodsId)
    local player = class(actor)
    if not player then return false end
    local g = Shop.goods[goodsId]
    if not g then return false end
    -- 限量商品的库存校验
    if g.limit and g.stock <= 0 then
        sendmsg(actor, 1, "今日已售罄，请明日再来")
        return false
    end
    -- 限购：单账号的日限
    local buyKey = "ShopBuy_" .. goodsId .. "_" .. os.date("%Y%m%d")
    local bought = tonumber(getplayvar(actor, 2, buyKey)) or 0
    if g.perDay and bought >= g.perDay then
        sendmsg(actor, 1, "该商品每日限购 " .. g.perDay .. " 件")
        return false
    end
    if not checkitemw(actor, "金币", g.price) then
        sendmsg(actor, 1, "金币不足")
        return false
    end
    takeitem(actor, "金币", g.price, 0, "购买 " .. g.name)
    if g.limit then g.stock = g.stock - 1 end
    setplayvar(actor, "HUMAN", buyKey, bought + 1, 1)
    giveitem(actor, g.name, 1)
    sendmsg(actor, 1, "购买成功：" .. g.name)
    return true
end

---限时货架的补货：每日零点回满
setontimerex(112, 60)
function Shop.restock()
    local hm = os.date("%H%M")
    if hm ~= "0000" then return end
    for _, g in pairs(Shop.goods) do
        if g.limit and g.daily then
            g.stock = g.dailyStock
        end
    end
    Ops.log("商店限时货架补货完成")
end