NetGroupInfo.cs

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using System;
using System.Collections.Generic;
 
namespace Terraria.Net;
 
public class NetGroupInfo
{
    public enum InfoProviderId
    {
        IPAddress,
        Steam
    }
 
    private interface INetGroupInfoProvider
    {
        InfoProviderId Id { get; }
 
        bool HasValidInfo { get; }
 
        string ProvideInfoNeededToJoin();
    }
 
    private class IPAddressInfoProvider : INetGroupInfoProvider
    {
        public InfoProviderId Id => InfoProviderId.IPAddress;
 
        public bool HasValidInfo => false;
 
        public string ProvideInfoNeededToJoin()
        {
            return "";
        }
    }
 
    private class SteamLobbyInfoProvider : INetGroupInfoProvider
    {
        public InfoProviderId Id => InfoProviderId.Steam;
 
        public bool HasValidInfo => Main.LobbyId != 0;
 
        public string ProvideInfoNeededToJoin()
        {
            return Main.LobbyId.ToString();
        }
    }
 
    private readonly string[] _separatorBetweenInfos = new string[1] { ", " };
 
    private readonly string[] _separatorBetweenIdAndInfo = new string[1] { ":" };
 
    private List<INetGroupInfoProvider> _infoProviders;
 
    public NetGroupInfo()
    {
        _infoProviders = new List<INetGroupInfoProvider>();
        _infoProviders.Add(new IPAddressInfoProvider());
        _infoProviders.Add(new SteamLobbyInfoProvider());
    }
 
    public string ComposeInfo()
    {
        List<string> list = new List<string>();
        foreach (INetGroupInfoProvider infoProvider in _infoProviders)
        {
            if (infoProvider.HasValidInfo)
            {
                string text = (int)infoProvider.Id + _separatorBetweenIdAndInfo[0] + infoProvider.ProvideInfoNeededToJoin();
                string item = ConvertToSafeInfo(text);
                list.Add(item);
            }
        }
        return string.Join(_separatorBetweenInfos[0], list.ToArray());
    }
 
    public Dictionary<InfoProviderId, string> DecomposeInfo(string info)
    {
        Dictionary<InfoProviderId, string> dictionary = new Dictionary<InfoProviderId, string>();
        string[] array = info.Split(_separatorBetweenInfos, StringSplitOptions.RemoveEmptyEntries);
        foreach (string text in array)
        {
            string[] array2 = ConvertFromSafeInfo(text).Split(_separatorBetweenIdAndInfo, StringSplitOptions.RemoveEmptyEntries);
            if (array2.Length == 2 && int.TryParse(array2[0], out var result))
            {
                dictionary[(InfoProviderId)result] = array2[1];
            }
        }
        return dictionary;
    }
 
    private string ConvertToSafeInfo(string text)
    {
        return Uri.EscapeDataString(text);
    }
 
    private string ConvertFromSafeInfo(string text)
    {
        return Uri.UnescapeDataString(text);
    }
}