【网络通信】分线系统：同屏超载的自动分线

---分线系统：进入地图时的线路分配
function Line.assign(actor, mapId)
    local player = class(actor)
    if not player then return 1 end
    -- 找一条未满的线：单线上限 300 人
    for line = 1, 5 do
        local cnt = Line.countOf(mapId, line)
        if cnt < 300 then
            Line.setLine(actor, line)
            return line
        end
    end
    -- 全满：进入排队或拒绝
    sendmsg(actor, 1, "所有线路已满，请稍后再试")
    return 0
end

---切线的指令：玩家主动换线
function Line.switch(actor, targetLine)
    local player = class(actor)
    if not player then return false end
    if Line.countOf(actor.mapId, targetLine) >= 300 then
        sendmsg(actor, 1, "目标线路已满")
        return false
    end
    Line.setLine(actor, targetLine)
    sendmsg(actor, 1, "已切换到 " .. targetLine .. " 线")
    return true
end

---线的状态：列表与人数的展示
setontimerex(119, 10)
function Line.broadcast(mapId)
    local lines = {}
    for line = 1, 5 do
        lines[line] = Line.countOf(mapId, line)
    end
    -- 线路人数推给界面显示
    Map.pushLineInfo(mapId, lines)
end

---组队的同线约束
function Line.teamConstraint(actor, teamLeader)
    local leaderLine = Line.of(teamLeader)
    if Line.countOf(actor.mapId, leaderLine) >= 300 then
        sendmsg(actor, 1, "队长所在线路已满，请稍后切换")
        return false
    end
    Line.setLine(actor, leaderLine)
    return true
end