【运维发布】活动排期日历：双线活动的冲突检查

---活动登记：时间与类型入历
function Calendar.schedule(act)
    -- 冲突检查：同类型活动的时间重叠
    for _, existing in ipairs(Calendar.acts) do
        if existing.type == act.type
            and act.startAt < existing.endAt
            and act.endAt > existing.startAt then
            return false, "与「" .. existing.name ..
                "」时间重叠"
        end
    end
    Calendar.acts[#Calendar.acts + 1] = act
    return true
end

---叠加收益的检查：双倍活动的乘积
function Calendar.checkStack(act)
    local stack = 0
    for _, e in ipairs(Calendar.acts) do
        if act.startAt < e.endAt and act.endAt > e.startAt then
            if e.kind == "exp" or e.kind == "drop" then
                stack = stack + 1
            end
        end
    end
    -- 同期经济类活动不超两个
    if stack >= 2 then
        return false, "同期收益活动过多，产出会失控"
    end
    return true
end

---活动的到期与自动收尾
setontimerex(91, 60)
function Calendar.tick()
    local now = os.time()
    for i = #Calendar.acts, 1, -1 do
        local act = Calendar.acts[i]
        if not act.opened and now >= act.startAt then
            act.opened = true
            Calendar.launch(act)
        elseif act.opened and now >= act.endAt then
            Calendar.close(act)
            table.remove(Calendar.acts, i)
        end
    end
end