【Lua实战】os 时钟边界：活动倒计时的两把尺子

-- 倒计时：绝对截止点写法
local player = class(actor)
local function publishCountdown(player, actId, endTs)
    if endTs <= os.time() then
        sendmsg(player, 1, 0, "活动已结束。")
        return
    end
    local remain = endTs - os.time()
    setplayvar(player, "HUMAN", "CdEnd_" .. actId, endTs, true)
    sendluamsg(player, 9981, remain, 0, 0, actId)
end

-- 回拨防护：单调校验
local player = class(actor)
local maxSeen = 0
local function safeRemain(endTs)
    local remain = endTs - os.time()
    if remain > maxSeen then
        maxSeen = remain
    end
    if remain < maxSeen - 5 then
        return maxSeen
    end
    return remain
end
local function fmtRemain(sec)
    return string.format("%02d:%02d:%02d",
        math.floor(sec / 3600), math.floor(sec / 60) % 60, sec % 60)
end