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using LiteNetLib;
using LiteNetLib.Utils;
namespace OnekoOnline.Net;
class Server
{
public static bool ServerRunning = false;
readonly Dictionary<int, ServerUser> users = [];
readonly EventBasedNetListener Listener;
readonly NetManager NetServer;
public Server(int Port, int MaxConnections, string ServerPassword = "")
{
Listener = new();
NetServer = new(Listener);
ServerRunning = NetServer.Start(Port);
if (!ServerRunning) return;
Listener.ConnectionRequestEvent += request => {
if (NetServer.ConnectedPeersCount < MaxConnections) request.AcceptIfKey(ServerPassword);
else request.Reject();
};
Listener.PeerConnectedEvent += peer => {
Console.WriteLine($"New connection from {peer.EndPoint}!");
users.Add(peer.Id, new ServerUser(peer.Id, peer));
};
Listener.PeerDisconnectedEvent += (peer, info) => {
Console.WriteLine($"{peer.EndPoint} Disconnected! Reason: {info.Reason}");
users.Remove(peer.Id);
NetDataWriter writer = new();
//Send all users a disconnect message
foreach (ServerUser user in users.Values) {
user.Peer.Send(new PacketInfo(PacketType.Disconnect, peer.Id).Serialize(), DeliveryMethod.ReliableUnordered);
}
};
Listener.NetworkReceiveEvent += (fromPeer, dataReader, channel, DeliveryMethod) => {
PacketInfo info = dataReader.GetPacketInfo();
ServerUser user = users[fromPeer.Id];
//Size limits for packet types
if (info.Type == PacketType.OnekoSpritesheet && dataReader.AvailableBytes > 30000) return;
else if (info.Type != PacketType.OnekoSpritesheet && dataReader.AvailableBytes > 500) return;
if (info.Type == PacketType.OnekoSpritesheet) user.SpriteSheet = dataReader.GetRemainingBytes();
else if (info.Type == PacketType.Username) user.Username = dataReader.GetString(64);
if (user.ExchangedData && !user.sentId) {
NetDataWriter writer = new();
//Send ID
writer.Put(user.Id);
fromPeer.Send(writer, DeliveryMethod.ReliableUnordered);
user.sentId = true;
Console.WriteLine($"{fromPeer.EndPoint} is {user.Username}!");
foreach (ServerUser toSend in users.Values)
{
if (!toSend.ExchangedData || toSend == user) continue;
//Send all current users spritesheets to this user.
writer.ResetWithInfo(new PacketInfo(PacketType.OnekoSpritesheet, toSend.Id), toSend.SpriteSheet!.Length);
writer.Put(toSend.SpriteSheet);
fromPeer.Send(writer, DeliveryMethod.ReliableUnordered);
writer.ResetWithInfo(new PacketInfo(PacketType.Username, toSend.Id));
writer.Put(toSend.Username);
fromPeer.Send(writer, DeliveryMethod.ReliableUnordered);
//Send all current users this users spritesheet
writer.ResetWithInfo(new PacketInfo(PacketType.OnekoSpritesheet, user.Id), user.SpriteSheet!.Length);
writer.Put(user.SpriteSheet);
toSend.Peer.Send(writer, DeliveryMethod.ReliableUnordered);
writer.ResetWithInfo(new PacketInfo(PacketType.Username, user.Id));
writer.Put(user.Username);
toSend.Peer.Send(writer, DeliveryMethod.ReliableUnordered);
}
}
};
Console.WriteLine("Server Initialized!");
}
public void Poll()
{
NetServer.PollEvents();
}
public void Disconnect()
{
NetServer.DisconnectAll();
}
}
class ServerUser(int id, NetPeer peer) : User(id), IDisposable
{
//Network
public readonly NetPeer Peer = peer;
public bool sentId = false;
public void Dispose()
{
Peer.Disconnect();
}
}
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