sharp-chat/SharpChat/S2CPackets/AuthFailS2CPacket.cs

using System.Text;

namespace SharpChat.S2CPackets {
    public class AuthFailS2CPacket(
        AuthFailS2CPacket.Reason reason,
        DateTimeOffset? expiresAt = null
    ) : S2CPacket {
        public enum Reason {
            AuthInvalid,
            MaxSessions,
            Banned,
            Exception,
        }

        public string Pack() {
            StringBuilder sb = new();

            sb.Append("1\tn\t");

            switch(reason) {
                case Reason.AuthInvalid:
                default:
                    sb.Append("authfail");
                    break;
                case Reason.Exception:
                    sb.Append("userfail");
                    break;
                case Reason.MaxSessions:
                    sb.Append("sockfail");
                    break;
                case Reason.Banned:
                    sb.Append("joinfail\t");
                    if(expiresAt is null || expiresAt == DateTimeOffset.MaxValue)
                        sb.Append("-1");
                    else
                        sb.Append(expiresAt.Value.ToUnixTimeSeconds());
                    break;
            }

            return sb.ToString();
        }
    }
}