benharri.org
IRC parsing, tokenization, and state handling in C#
1using System;
2using System.Net.Sockets;
3using System.Threading;
4using IRCTokens;
5// ReSharper disable StringLiteralTypo
6
7namespace Tokens;
8
9public class Client
10{
11 private readonly byte[] _bytes = new byte[1024];
12 private readonly StatefulDecoder _decoder = new();
13 private readonly StatefulEncoder _encoder = new();
14 private readonly Socket _socket = new(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
15
16 public void Start()
17 {
18 _socket.Connect("127.0.0.1", 6667);
19 while (!_socket.Connected) Thread.Sleep(1000);
20
21 Send(new("NICK", "tokensbot"));
22 Send(new("USER", "tokensbot", "0", "*", "real name"));
23
24 while (true)
25 {
26 var bytesReceived = _socket.Receive(_bytes);
27
28 if (bytesReceived == 0)
29 {
30 Console.WriteLine("! disconnected");
31 _socket.Shutdown(SocketShutdown.Both);
32 _socket.Close();
33 break;
34 }
35
36 var lines = _decoder.Push(_bytes, bytesReceived);
37
38 foreach (var line in lines)
39 {
40 Console.WriteLine($"< {line.Format()}");
41
42 switch (line.Command)
43 {
44 case "PING":
45 Send(new("PONG", line.Params[0]));
46 break;
47 case "001":
48 Send(new("JOIN", "#irctokens"));
49 break;
50 case "PRIVMSG":
51 Send(new("PRIVMSG", line.Params[0], "hello there"));
52 break;
53 }
54 }
55 }
56 }
57
58 private void Send(Line line)
59 {
60 Console.WriteLine($"> {line.Format()}");
61 _encoder.Push(line);
62 while (_encoder.PendingBytes.Length > 0)
63 _encoder.Pop(_socket.Send(_encoder.PendingBytes, SocketFlags.None));
64 }
65}