ircsharp/IRCStates/Channel.cs

using System;
using System.Collections.Generic;
using System.Linq;
// ReSharper disable AutoPropertyCanBeMadeGetOnly.Local

namespace IRCStates
{
    public class Channel
    {
        public string Name { get; private set; }
        public string NameLower { get; private set; }
        public Dictionary<string, ChannelUser> Users { get; private set; } = new Dictionary<string, ChannelUser>();
        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; private set; } = new Dictionary<string, List<string>>();
        public Dictionary<string, string> Modes { get; private set; } = new Dictionary<string, string>();

        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);
            }
        }
    }
}