sharp-chat/SharpChat/Packet/ChannelsPopulatePacket.cs

using System;
using System.Text;

namespace SharpChat.Packet {
    public class ChannelsPopulatePacket : ServerPacket {
        public record ListEntry(string Name, bool HasPassword, bool IsTemporary);

        private readonly ListEntry[] Entries;

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

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

            sb.AppendFormat("7\t2\t{0}", Entries.Length);

            foreach(ListEntry entry in Entries)
                sb.AppendFormat(
                    "\t{0}\t{1}\t{2}",
                    entry.Name,
                    entry.HasPassword ? 1 : 0,
                    entry.IsTemporary ? 1 : 0
                );

            return sb.ToString();
        }
    }
}