sharp-chat/SharpChat/Packet/UsersPopulatePacket.cs

using System;
using System.Text;

namespace SharpChat.Packet {
    public class UsersPopulatePacket : ServerPacket {
        public record ListEntry(long Id, string Name, ChatColour Colour, int Rank, ChatUserPermissions Perms, bool Visible);

        private readonly ListEntry[] Entries;

        public UsersPopulatePacket(ListEntry[] entries) {
            Entries = entries ?? throw new ArgumentNullException(nameof(entries));
        }

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

            sb.AppendFormat("7\t0\t{0}", Entries.Length);

            foreach(ListEntry entry in Entries)
                sb.AppendFormat(
                    "\t{0}\t{1}\t{2}\t{3} {4} {5} {6} {7}\t{8}",
                    entry.Id,
                    entry.Name,
                    entry.Colour,
                    entry.Rank,
                    entry.Perms.HasFlag(ChatUserPermissions.KickUser) ? 1 : 0,
                    entry.Perms.HasFlag(ChatUserPermissions.ViewLogs) ? 1 : 0,
                    entry.Perms.HasFlag(ChatUserPermissions.SetOwnNickname) ? 1 : 0,
                    entry.Perms.HasFlag(ChatUserPermissions.CreateChannel) ? (
                        entry.Perms.HasFlag(ChatUserPermissions.SetChannelPermanent) ? 2 : 1
                    ) : 0,
                    entry.Visible ? 1 : 0
                );

            return sb.ToString();
        }
    }
}