【网络通信】消息分发：协议号到处理函数的路由表

---路由表：协议号到处理函数
local ROUTES = {}
local function route(msgId, handler, needLogin)
    ROUTES[msgId] = { fn = handler, auth = needLogin }
end

route(MSGID.CHAT_SEND,  Handlers.chat,  true)
route(MSGID.BAG_SWAP,   Handlers.bag,   true)
route(MSGID.SKILL_CAST, Handlers.skill, true)
route(MSGID.HEARTBEAT,  Handlers.beat,  false)

---分发器：查表即调
function MsgRoute.dispatch(actor, msgId, body)
    local r = ROUTES[msgId]
    if not r then
        MsgRoute.bad(actor, msgId)
        return
    end
    if r.auth and not actor.logined then
        MsgRoute.reject(actor, msgId)
        return
    end
    r.fn(actor, body)
end

---协议号的分配与冲突检测
local ALLOC = { chat = 1000, bag = 2000, skill = 3000 }

function MsgRoute.alloc(kind, name)
    local base = ALLOC[kind]
    local id = MsgRoute.nextId(kind)
    if ROUTES[base + id] then
        error("协议号冲突: " .. kind .. "/" .. name)
    end
    return base + id
end

---路由表的自检：启动时全表扫描
setontimerex(65, 0)
function MsgRoute.selfcheck()
    for id, r in pairs(ROUTES) do
        if type(r.fn) ~= "function" then
            Ops.alert("路由异常: " .. id)
        end
    end
end