ircsharp/IrcStates/Channel.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace IrcStates
{
    public class Channel
    {
        public string Name { get; set; }
        public string NameLower { get; set; }
        public Dictionary<string, User> Users { get; set; }
        public string Topic { get; set; }
        public string TopicSetter { get; set; }
        public DateTime TopicTime { get; set; }
        public DateTime Created { get; set; }
        public Dictionary<string, List<string>> ListModes { get; set; }
        public Dictionary<string, string> Modes { get; set; }

        public override string ToString()
        {
            return $"Channel(name={Name})";
        }

        public void SetName(string name, string nameLower)
        {
            Name = name;
            NameLower = nameLower;
        }

        public void AddMode(string ch, string param, bool listMode)
        {
            if (listMode)
            {
                if (!ListModes.ContainsKey(ch))
                {
                    ListModes[ch] = new List<string>();
                }

                if (ListModes[ch].Contains(param))
                {
                    ListModes[ch].Add(param ?? string.Empty);
                }
            }
            else
            {
                Modes[ch] = param;
            }
        }

        public void RemoveMode(string ch, string param)
        {
            if (ListModes.ContainsKey(ch))
            {
                if (ListModes[ch].Contains(param))
                {
                    ListModes[ch].Remove(param);
                    if (!ListModes[ch].Any())
                    {
                        ListModes.Remove(ch);
                    }
                }
            }
            else if (Modes.ContainsKey(ch))
            {
                Modes.Remove(ch);
            }
        }
    }
}