【框架设计】限时活动日历：开启判定与预告推送

local ACT_CALENDAR = {
    { wday = 1, name = "攻城战",   open = { { 20, 0, 22, 0 } } },
    { wday = 3, name = "双倍经验", open = { { 12, 0, 14, 0 }, { 19, 0, 23, 0 } } },
    { wday = 6, name = "跨服战场", open = { { 14, 0, 17, 0 } } },
}
function Calendar.isOpen(actId, now)
    local act = ACT_CALENDAR[actId]
    local wd = tonumber(os.date("%w", now))
    if wd ~= act.wday then return false end
    local hhmm = tonumber(os.date("%H%M", now))
    for _, win in ipairs(act.open) do
        if hhmm >= win[1] * 100 + win[2] and hhmm <= win[3] * 100 + win[4] then
            return true
        end
    end
    return false
end

function Calendar.preNotify(now)
    for actId, act in ipairs(ACT_CALENDAR) do
        local nextAt = Calendar.nextOpen(act, now)
        if nextAt - now <= 600 and not act.notified then
            act.notified = true
            QF_PushAll("「" .. act.name .. "」10 分钟后开启")
        end
    end
end