【网络通信】推送合并：非紧急消息的定时聚合下发

-- 推送合并：缓冲与直发
local player = class(actor)
local URGENT = {["私聊"] = true, ["交易"] = true}
local buffer = {}
local function pushMessage(player, msgType, content)
    if URGENT[msgType] then
        sendmsg(player, 1, 0, msgType .. "：" .. content)
        return
    end
    local b = buffer[msgType]
    if b == nil then
        b = {cnt = 0, latest = ""}
        buffer[msgType] = b
    end
    b.cnt = b.cnt + 1
    b.latest = content
end

-- 窗口下发：摘要打包
local player = class(actor)
local function flushBuffer(player)
    local parts = {}
    for msgType, b in pairs(buffer) do
        if b.cnt == 1 then
            parts[#parts + 1] = msgType .. "：" .. b.latest
        else
            parts[#parts + 1] = msgType .. " x" .. b.cnt .. "（最新：" .. b.latest .. "）"
        end
    end
    if #parts > 0 then
        sendmsg(player, 1, 0, "【摘要】" .. table.concat(parts, "；"))
    end
    buffer = {}
end