【进阶实战】答题防挂机：题库轮换与作答时限封装

local BANK = {
    { q = "沃玛教主盘踞在哪张地图？", a = "沃玛寺庙" },
    { q = "裁决之杖是哪个职业的终极追求？", a = "战士" },
    { q = "沙巴克攻城的报名凭证是？", a = "祖玛头像" },
}
local function drawQuestion(actor)
    actor = getplayerbyname(actor)
    local item = BANK[math.random(1, #BANK)]
    setplayvar(actor, "HUMAN", "QuizKey", item.a, 0)
    setplayvar(actor, "HUMAN", "QuizAt", os.time(), 0)
    sendmsg(actor, 1, "【答题】" .. item.q .. "（30 秒内作答）")
end
local function onQuizAnswer(actor, msg)
    actor = getplayerbyname(actor)
    local key = getplayvar(actor, "HUMAN", "QuizKey")
    if key == "" or key == nil then
        sendmsg(actor, 1, "当前没有进行中的答题。")
        return
    end
    local at = tonumber(getplayvar(actor, "HUMAN", "QuizAt")) or 0
    setplayvar(actor, "HUMAN", "QuizKey", "", 0)
    if os.time() - at > 30 then
        sendmsg(actor, 1, "作答超时（限 30 秒），本题作废。")
        return
    end
    if msg ~= key then
        sendmsg(actor, 1, "回答错误，奖励落空。")
        return
    end
    giveitem(actor, "金条", 1)
    sendmsg(actor, 1, "回答正确，1 根金条已入包。")
end

local function checkRhythm(actor, now)
    actor = getplayerbyname(actor)
    local last = tonumber(getplayvar(actor, "HUMAN", "QuizLast")) or 0
    setplayvar(actor, "HUMAN", "QuizLast", now, 0)
    if last == 0 then
        return false
    end
    local gap = now - last
    return gap <= 2
end