/// <summary>
/// 处理玩家提交的快照数据
/// </summary>
internal bool Commit(int frame, ulong gcNID, ByteString data)
{
if (!this._frameToSnapshots.TryGetValue(frame, out List <PlayerSnapshot> playerSnapshots))
{
playerSnapshots = new List <PlayerSnapshot>();
this._frameToSnapshots[frame] = playerSnapshots;
}
//检查玩家是否重复提交
if (playerSnapshots.Any(snapshot => snapshot.gcNID == gcNID))
{
Logger.Error($"user:{gcNID} duplicate commit snapshot!");
return(false);
}
PlayerSnapshot playerSnapshot = new PlayerSnapshot();
playerSnapshot.gcNID = gcNID;
playerSnapshot.data = data;
playerSnapshot.crc = CRC32.Compute(data.ToByteArray());
playerSnapshots.Add(playerSnapshot);
return(this.CheckPlayerSnapshots(frame, playerSnapshots));
}
private bool CheckPlayerSnapshots(int frame, List <PlayerSnapshot> playerSnapshots)
{
//判断是否所有玩家都提交了快照
if (playerSnapshots.Count < this._battle.numChampions)
{
return(false);
}
//检查crc一致性
//先找出crc多数一致的组
bool success = true;
var group = playerSnapshots.GroupBy(s => s.crc);
//如果只有一个分组,则代表全部玩家的crc值一致
//否则每个玩家进行判断
if (group.Count() > 1)
{
IGrouping <uint, PlayerSnapshot> maxGroup = null;
int max = 0;
foreach (var e in group)
{
int c = e.Count();
if (c <= max)
{
continue;
}
maxGroup = e;
max = c;
}
System.Diagnostics.Debug.Assert(maxGroup != null);
//正确的crc值
uint crc = maxGroup.Key;
int count = playerSnapshots.Count;
for (int i = 0; i < count; i++)
{
PlayerSnapshot playerSnapshot = playerSnapshots[i];
if (playerSnapshot.crc == crc)
{
continue;
}
Logger.Log(PrintSnapshot(maxGroup.First().data));
Logger.Log(PrintSnapshot(playerSnapshot.data));
Logger.Warn($"{playerSnapshot.gcNID} different snapshot crc32 value, expect:{crc} but:{playerSnapshot.crc} at frame:{frame}");
success = false;
//发生不同步,触发回调函数
this._battle.OnOutOfSync(playerSnapshot.gcNID, frame, maxGroup.First().data, playerSnapshot.data);
}
}
//如果crc正确
if (success)
{
ByteString data = playerSnapshots[0].data;
//把快照数据保存到历史记录里
FrameSnapshot frameSnapshot = new FrameSnapshot {
data = data, frame = frame
};
this.Set(frameSnapshot);
//该帧的检查已经完成,可以不保留在内存了
this._frameToSnapshots.Remove(frame);
Logger.Log($"success,f{frame},snap count:{this._frameToSnapshot.Count},wcount:{this._frameToSnapshots.Count}");
}
return(success);
}
