TwitchChatSimple

using System.IO;
using System.Net.Sockets;
using UnityEngine;
using System;
using System.Collections;
using UnityEngine.Networking;

public class TwitchChatSimple : MonoBehaviour
{

    private TcpClient twitchClient;
    private StreamReader reader;
    private StreamWriter writer;
    //Oauth password can be generated at https://twitchapps.com/tmi
    // [HideInInspector]
    public string username, password, channel;

    public string custom_rewards_id;

    public GameObject emotePrefab;

    public Transform startPoint;
    void Start()
    {
        Connect();
    }

    void Update()
    {
        // if not connected, reconnect
        if (!twitchClient.Connected)
        {
            Connect();
        }

        ProcessChat();
    }


    IEnumerator GetTexture(string url)
    {
        UnityWebRequest www = UnityWebRequestTexture.GetTexture(url);
        yield return www.SendWebRequest();

        Texture2D img = DownloadHandlerTexture.GetContent(www);
        GameObject emotePart = Instantiate(emotePrefab, startPoint.position, startPoint.rotation);
        emotePart.GetComponent<ParticleSystem>().GetComponent<Renderer>().material.mainTexture = img;

    }

    private void Connect()
    {
        // log into the twitch chat of a channel
        twitchClient = new TcpClient("irc.chat.twitch.tv", 6667);
        reader = new StreamReader(twitchClient.GetStream());
        writer = new StreamWriter(twitchClient.GetStream());
        writer.WriteLine("PASS " + password);
        writer.WriteLine("NICK " + username);
        writer.WriteLine("USER " + username + " 8 * :" + username);
        writer.WriteLine("JOIN #" + channel);
        writer.WriteLine("CAP REQ :twitch.tv/tags");
        writer.WriteLine("CAP REQ :twitch.tv/commands");
        writer.WriteLine("CAP REQ :twitch.tv/membership");
        writer.Flush();
    }

    private void ProcessChat()
    {
        // check if there is any data to read
        if (twitchClient.Available > 0)
        {
            string message = reader.ReadLine();
            print(message);

            if (message.Contains("PRIVMSG"))
            {
                // if the emotes list is not empty, get the emote texture
                if (!message.Contains("emotes=;"))
                {

                    string[] stringSeparators = new string[] { "emotes=" };
                    string[] result = message.Split(stringSeparators, StringSplitOptions.None);
                    // split the emote string in case of multiple emotes
                    var splitPointallEmotes = result[1].IndexOf(";", 0);
                    var allemotes = result[1].Substring(0, splitPointallEmotes);
                    string[] seperateEmotes = allemotes.Split('/');
                    // grab all emote textures
                    for (int i = 0; i < seperateEmotes.Length; i++)
                    {
                        var id = seperateEmotes[i].IndexOf(":", 0);
                        var emoteID = seperateEmotes[i].Substring(0, id);
                        // 1.0 / 2.0 / 3.0 is texture sizes
                        StartCoroutine(GetTexture("https://static-cdn.jtvnw.net/emoticons/v1/" + emoteID + "/3.0"));
                    }
                }

                if (message.Contains("@badge-info=subscriber"))
                {
                    print("this person is a subscriber");
                }

                // custom reward
                if (message.Contains("custom-reward-id=" + custom_rewards_id))
                {
                    print("Redeemed a custom reward");

                }


            }
            //reply to ping to stay connected
            if (message.Contains("PING :tmi.twitch.tv"))
            {
                writer.WriteLine("PONG " + "tmi.twitch.tv" + "\r\n");
                writer.Flush();
                print("replied");
            }


        }
    }

}