sharp-chat/SharpChat/Packet/BanListPacket.cs

using SharpChat.Misuzu;
using System.Text;

namespace SharpChat.Packet {
    public class BanListPacket(
        long msgId,
        IEnumerable<MisuzuBanInfo> bans
    ) : IServerPacket {
        public IEnumerable<MisuzuBanInfo> Bans { get; private set; } = bans ?? throw new ArgumentNullException(nameof(bans));

        public IEnumerable<string> Pack() {
            StringBuilder sb = new();

            sb.Append('2');
            sb.Append('\t');
            sb.Append(DateTimeOffset.Now.ToUnixTimeSeconds());
            sb.Append("\t-1\t0\fbanlist\f");

            foreach(MisuzuBanInfo ban in Bans) {
                string banStr = string.IsNullOrEmpty(ban.UserName) ? (ban.RemoteAddress ?? "::") : (ban.UserName ?? $"({ban.UserId})");
                sb.AppendFormat(@"<a href=""javascript:void(0);"" onclick=""Chat.SendMessageWrapper('/unban '+ this.innerHTML);"">{0}</a>, ", banStr);
            }

            if(Bans.Any())
                sb.Length -= 2;

            sb.Append('\t');
            sb.Append(msgId);
            sb.Append("\t10010");

            yield return sb.ToString();
        }
    }
}