SmoOnlineServer/Shared/Constants.cs

using System.Reflection;
using System.Runtime.InteropServices;
using Shared.Packet;
using Shared.Packet.Packets;

namespace Shared;

public static class Constants {
    public const int MaxPacketSize = 256;
    public const int MaxClients = 4;
    public const int CostumeNameSize = 0x20;

    // dictionary of packet types to packet
    public static readonly Dictionary<Type, PacketAttribute> PacketMap = Assembly
        .GetExecutingAssembly()
        .GetTypes()
        .Where(type => type.IsAssignableTo(typeof(IPacket)))
        .ToDictionary(type => type, type => type.GetCustomAttribute<PacketAttribute>()!);
    public static readonly Dictionary<PacketType, Type> PacketIdMap = Assembly
        .GetExecutingAssembly()
        .GetTypes()
        .Where(type => type.IsAssignableTo(typeof(IPacket)))
        .ToDictionary(type => type.GetCustomAttribute<PacketAttribute>()!.Type, type => type);

    public static int HeaderSize { get; } = Marshal.SizeOf<PacketHeader>();
    public static int PacketDataSize { get; } = MaxPacketSize - HeaderSize;
}