【框架设计】双倍卡池：多活动双倍的统一管理框架

-- 双倍卡池：注册与取值
local player = class(actor)
local POOL = {}
local function registerBoost(player, boostType, rate, expireTs)
    POOL[boostType] = {rate = rate, expire = expireTs}
    sendmsg(player, 1, 0, boostType .. " 双倍已注册，倍率 " .. rate .. "。")
end
local function getBestRate(player, boostType)
    local entry = POOL[boostType]
    if entry and entry.expire > os.time() then
        return entry.rate
    end
    return 1
end

-- 双倍卡池：统一查询
local player = class(actor)
local function applyBoost(player, boostType, baseValue)
    local rate = getBestRate(player, boostType)
    local final = math.floor(baseValue * rate)
    if rate > 1 then
        sendmsg(player, 1, 0, baseValue .. " x" .. rate .. " = " .. final .. "（双倍加成）")
    end
    return final
end