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using System.Buffers.Binary;
using LiteNetLib.Utils;
namespace OnekoOnline.Net;
public static class NetExtensions
{
public static void Put(this NetDataWriter writer, PacketInfo info)
{
writer.Put(info.Serialize());
}
public static PacketInfo GetPacketInfo(this NetDataReader reader)
{
return PacketInfo.Deserialize(reader.GetBytesSegment(PacketInfo.SizeOf));
}
public static PacketInfo PeekPacketInfo(this NetDataReader reader)
{
if (reader.AvailableBytes < PacketInfo.SizeOf) return PacketInfo.InvalidPacket;
return PacketInfo.Deserialize(reader.RawData.AsSpan(0, PacketInfo.SizeOf));
}
public static void ResetWithInfo(this NetDataWriter writer, PacketInfo info)
{
writer.Reset();
writer.Put(info);
}
public static void ResetWithInfo(this NetDataWriter writer, PacketInfo info, int size)
{
writer.Reset(size+PacketInfo.SizeOf);
writer.Put(info);
}
}
public enum PacketType : byte
{
MousePosition,
OnekoState,
OnekoSpritesheet,
Username,
UserId,
Disconnect,
Invalid
}
public struct PacketInfo
{
public readonly PacketType Type;
public readonly int FromId;
public const int SizeOf = sizeof(int) + 1;
public readonly bool IsValid => Type != PacketType.Invalid;
public static readonly PacketInfo InvalidPacket = new(PacketType.Invalid, -1);
public PacketInfo(PacketType type, int id)
{
Type = type;
FromId = id;
}
public readonly void Serialize(Span<byte> span)
{
span[0] = (byte)Type;
BinaryPrimitives.WriteInt32LittleEndian(span[1..], FromId);
}
public readonly byte[] Serialize()
{
byte[] bytes = new byte[SizeOf];
Serialize(bytes);
return bytes;
}
public static PacketInfo Deserialize(ReadOnlySpan<byte> span)
{
PacketType type = (PacketType)span[0];
int id = BinaryPrimitives.ReadInt32LittleEndian(span[1..]);
return new PacketInfo(type, id);
}
}
class User(int id)
{
public readonly int Id = id;
//Oneko Stuff
public byte[]? SpriteSheet;
public string? Username;
public bool ExchangedData => SpriteSheet != null && Username != null;
}
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