【进阶实战】交易锁：装备上锁与定时解锁的封装

local LOCK_SEC = 86400
local function lockItem(actor, itemName)
    setplayvar(actor, 0, "TradeLock_" .. itemName,
        os.time() + LOCK_SEC, 1)
    sendmsg(actor, 1, itemName .. " 已上锁，24 小时内禁止交易。")
end
local function canTrade(actor, itemName)
    local unlockAt = tonumber(getplayvar(actor, 0,
        "TradeLock_" .. itemName)) or 0
    if os.time() < unlockAt then
        local left = unlockAt - os.time()
        sendmsg(actor, 1, itemName .. " 锁定中，剩 "
            .. math.floor(left / 3600) .. " 小时。")
        return false
    end
    return true
end

local function onTradeRequest(actor, itemName)
    if not canTrade(actor, itemName) then
        return
    end
    sendmsg(actor, 1, "校验通过，交易继续。")
end