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https://github.com/reactos/reactos.git
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660 lines
17 KiB
C#
660 lines
17 KiB
C#
using System;
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using System.IO;
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using System.Text;
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using System.Collections;
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using System.Net.Sockets;
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namespace TechBot.IRCLibrary
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{
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/// <summary>
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/// Delegate that delivers an IRC message.
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/// </summary>
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public delegate void MessageReceivedHandler(IrcMessage message);
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/// <summary>
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/// Delegate that notifies if the user database for a channel has changed.
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/// </summary>
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public delegate void ChannelUserDatabaseChangedHandler(IrcChannel channel);
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/// <summary>
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/// An IRC client.
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/// </summary>
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public class IrcClient
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{
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/// <summary>
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/// Monitor when an IRC command is received.
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/// </summary>
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private class IrcCommandEventRegistration
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{
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/// <summary>
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/// IRC command to monitor.
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/// </summary>
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private string command;
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public string Command
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{
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get
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{
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return command;
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}
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}
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/// <summary>
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/// Handler to call when command is received.
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/// </summary>
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private MessageReceivedHandler handler;
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public MessageReceivedHandler Handler
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{
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get
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{
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return handler;
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}
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}
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/// <summary>
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/// Constructor.
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/// </summary>
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/// <param name="command">IRC command to monitor.</param>
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/// <param name="handler">Handler to call when command is received.</param>
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public IrcCommandEventRegistration(string command,
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MessageReceivedHandler handler)
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{
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this.command = command;
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this.handler = handler;
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}
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}
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/// <summary>
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/// A buffer to store lines of text.
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/// </summary>
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private class LineBuffer
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{
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/// <summary>
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/// Full lines of text in buffer.
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/// </summary>
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private ArrayList strings;
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/// <summary>
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/// Part of the last line of text in buffer.
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/// </summary>
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private string left = "";
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/// <summary>
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/// Standard constructor.
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/// </summary>
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public LineBuffer()
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{
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strings = new ArrayList();
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}
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/// <summary>
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/// Return true if there is a complete line in the buffer or false if there is not.
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/// </summary>
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public bool DataAvailable
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{
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get
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{
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return (strings.Count > 0);
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}
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}
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/// <summary>
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/// Return next complete line in buffer or null if none exists.
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/// </summary>
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/// <returns>Next complete line in buffer or null if none exists.</returns>
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public string Read()
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{
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if (DataAvailable)
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{
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string line = strings[0] as string;
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strings.RemoveAt(0);
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return line;
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}
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else
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{
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return null;
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}
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}
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/// <summary>
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/// Write a string to buffer splitting it into lines.
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/// </summary>
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/// <param name="data"></param>
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public void Write(string data)
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{
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data = left + data;
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left = "";
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string[] sa = data.Split(new char[] { '\n' });
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if (sa.Length <= 0)
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{
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left = data;
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return;
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}
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else
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{
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left = "";
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}
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for (int i = 0; i < sa.Length; i++)
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{
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if (i < sa.Length - 1)
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{
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/* This is a complete line. Remove any \r characters at the end of the line. */
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string line = sa[i].TrimEnd(new char[] { '\r', '\n'});
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/* Silently ignore empty lines */
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if (!line.Equals(String.Empty))
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{
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strings.Add(line);
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}
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}
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else
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{
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/* This may be a partial line. */
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left = sa[i];
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}
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}
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}
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}
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/// <summary>
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/// State for asynchronous reads.
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/// </summary>
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private class StateObject
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{
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/// <summary>
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/// Network stream where data is read from.
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/// </summary>
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public NetworkStream Stream;
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/// <summary>
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/// Buffer where data is put.
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/// </summary>
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public byte[] Buffer;
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/// <summary>
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/// Constructor.
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/// </summary>
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/// <param name="stream">Network stream where data is read from.</param>
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/// <param name="buffer">Buffer where data is put.</param>
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public StateObject(NetworkStream stream, byte[] buffer)
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{
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this.Stream = stream;
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this.Buffer = buffer;
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}
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}
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#region Private fields
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private bool firstPingReceived = false;
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private System.Text.Encoding encoding = System.Text.Encoding.UTF8;
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private TcpClient tcpClient;
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private NetworkStream networkStream;
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private bool connected = false;
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private LineBuffer messageStream;
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private ArrayList ircCommandEventRegistrations = new ArrayList();
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private ArrayList channels = new ArrayList();
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#endregion
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#region Public events
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public event MessageReceivedHandler MessageReceived;
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public event ChannelUserDatabaseChangedHandler ChannelUserDatabaseChanged;
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#endregion
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#region Public properties
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/// <summary>
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/// Encoding used.
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/// </summary>
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public System.Text.Encoding Encoding
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{
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get
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{
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return encoding;
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}
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set
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{
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encoding = value;
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}
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}
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/// <summary>
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/// List of joined channels.
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/// </summary>
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public ArrayList Channels
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{
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get
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{
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return channels;
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}
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}
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#endregion
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#region Private methods
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/// <summary>
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/// Signal MessageReceived event.
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/// </summary>
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/// <param name="message">Message that was received.</param>
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private void OnMessageReceived(IrcMessage message)
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{
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foreach (IrcCommandEventRegistration icre in ircCommandEventRegistrations)
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{
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if (message.Command.ToLower().Equals(icre.Command.ToLower()))
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{
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icre.Handler(message);
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}
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}
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if (MessageReceived != null)
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{
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MessageReceived(message);
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}
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}
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/// <summary>
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/// Signal ChannelUserDatabaseChanged event.
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/// </summary>
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/// <param name="channel">Message that was received.</param>
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private void OnChannelUserDatabaseChanged(IrcChannel channel)
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{
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if (ChannelUserDatabaseChanged != null)
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{
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ChannelUserDatabaseChanged(channel);
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}
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}
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/// <summary>
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/// Start an asynchronous read.
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/// </summary>
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private void Receive()
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{
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if ((networkStream != null) && (networkStream.CanRead))
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{
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byte[] buffer = new byte[1024];
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networkStream.BeginRead(buffer, 0, buffer.Length,
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new AsyncCallback(ReadComplete),
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new StateObject(networkStream, buffer));
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}
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else
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{
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throw new Exception("Socket is closed.");
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}
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}
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/// <summary>
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/// Asynchronous read has completed.
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/// </summary>
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/// <param name="ar">IAsyncResult object.</param>
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private void ReadComplete(IAsyncResult ar)
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{
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StateObject stateObject = (StateObject) ar.AsyncState;
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if (stateObject.Stream.CanRead)
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{
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int bytesReceived = stateObject.Stream.EndRead(ar);
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if (bytesReceived > 0)
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{
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messageStream.Write(Encoding.GetString(stateObject.Buffer, 0, bytesReceived));
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while (messageStream.DataAvailable)
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{
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OnMessageReceived(new IrcMessage(messageStream.Read()));
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}
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}
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}
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Receive();
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}
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/// <summary>
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/// Locate channel.
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/// </summary>
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/// <param name="name">Channel name.</param>
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/// <returns>Channel or null if none was found.</returns>
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private IrcChannel LocateChannel(string name)
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{
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foreach (IrcChannel channel in Channels)
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{
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if (name.ToLower().Equals(channel.Name.ToLower()))
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{
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return channel;
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}
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}
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return null;
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}
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/// <summary>
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/// Send a PONG message when a PING message is received.
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/// </summary>
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/// <param name="message">Received IRC message.</param>
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private void PingMessageReceived(IrcMessage message)
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{
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SendMessage(new IrcMessage(IRC.PONG, message.Parameters));
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firstPingReceived = true;
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}
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/// <summary>
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/// Process RPL_NAMREPLY message.
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/// </summary>
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/// <param name="message">Received IRC message.</param>
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private void RPL_NAMREPLYMessageReceived(IrcMessage message)
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{
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try
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{
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// :Oslo2.NO.EU.undernet.org 353 E101 = #E101 :E101 KongFu_uK @Exception
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/* "( "=" / "*" / "@" ) <channel>
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:[ "@" / "+" ] <nick> *( " " [ "@" / "+" ] <nick> )
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- "@" is used for secret channels, "*" for private
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channels, and "=" for others (public channels). */
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if (message.Parameters == null)
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{
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System.Diagnostics.Debug.WriteLine(String.Format("Message has no parameters."));
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return;
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}
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string[] parameters = message.Parameters.Split(new char[] { ' '});
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if (parameters.Length < 5)
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{
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System.Diagnostics.Debug.WriteLine(String.Format("{0} is two few parameters.", parameters.Length));
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return;
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}
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IrcChannelType type;
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switch (parameters[1])
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{
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case "=":
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type = IrcChannelType.Public;
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break;
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case "*":
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type = IrcChannelType.Private;
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break;
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case "@":
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type = IrcChannelType.Secret;
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break;
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default:
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type = IrcChannelType.Public;
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break;
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}
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IrcChannel channel = LocateChannel(parameters[2].Substring(1));
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if (channel == null)
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{
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System.Diagnostics.Debug.WriteLine(String.Format("Channel not found '{0}'.",
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parameters[2].Substring(1)));
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return;
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}
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string nickname = parameters[3];
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if (nickname[0] != ':')
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{
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System.Diagnostics.Debug.WriteLine(String.Format("String should start with : and not {0}.", nickname[0]));
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return;
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}
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/* Skip : */
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IrcUser user = channel.LocateUser(nickname.Substring(1));
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if (user == null)
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{
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user = new IrcUser(this,
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nickname.Substring(1));
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channel.Users.Add(user);
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}
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for (int i = 4; i < parameters.Length; i++)
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{
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nickname = parameters[i];
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user = channel.LocateUser(nickname);
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if (user == null)
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{
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user = new IrcUser(this,
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nickname);
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channel.Users.Add(user);
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}
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}
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}
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catch (Exception ex)
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{
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System.Diagnostics.Debug.WriteLine(String.Format("Ex. {0}", ex));
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}
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}
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/// <summary>
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/// Process RPL_ENDOFNAMES message.
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/// </summary>
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/// <param name="message">Received IRC message.</param>
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private void RPL_ENDOFNAMESMessageReceived(IrcMessage message)
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{
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try
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{
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/* <channel> :End of NAMES list */
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if (message.Parameters == null)
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{
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System.Diagnostics.Debug.WriteLine(String.Format("Message has no parameters."));
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return;
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}
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string[] parameters = message.Parameters.Split(new char[] { ' ' });
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IrcChannel channel = LocateChannel(parameters[1].Substring(1));
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if (channel == null)
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{
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System.Diagnostics.Debug.WriteLine(String.Format("Channel not found '{0}'.",
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parameters[0].Substring(1)));
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return;
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}
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OnChannelUserDatabaseChanged(channel);
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}
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catch (Exception ex)
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{
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System.Diagnostics.Debug.WriteLine(String.Format("Ex. {0}", ex));
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}
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}
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#endregion
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/// <summary>
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/// Connect to the specified IRC server on the specified port.
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/// </summary>
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/// <param name="server">Address of IRC server.</param>
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/// <param name="port">Port of IRC server.</param>
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public void Connect(string server, int port)
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{
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if (connected)
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{
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throw new AlreadyConnectedException();
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}
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else
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{
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messageStream = new LineBuffer();
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tcpClient = new TcpClient();
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tcpClient.Connect(server, port);
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tcpClient.NoDelay = true;
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tcpClient.LingerState = new LingerOption(false, 0);
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networkStream = tcpClient.GetStream();
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connected = networkStream.CanRead && networkStream.CanWrite;
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if (!connected)
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{
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throw new Exception("Cannot read and write from socket.");
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}
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/* Install PING message handler */
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MonitorCommand(IRC.PING, new MessageReceivedHandler(PingMessageReceived));
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/* Install RPL_NAMREPLY message handler */
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MonitorCommand(IRC.RPL_NAMREPLY, new MessageReceivedHandler(RPL_NAMREPLYMessageReceived));
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/* Install RPL_ENDOFNAMES message handler */
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MonitorCommand(IRC.RPL_ENDOFNAMES, new MessageReceivedHandler(RPL_ENDOFNAMESMessageReceived));
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/* Start receiving data */
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Receive();
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}
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}
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/// <summary>
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/// Disconnect from IRC server.
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/// </summary>
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public void Diconnect()
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{
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if (!connected)
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{
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throw new NotConnectedException();
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}
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else
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{
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connected = false;
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tcpClient.Close();
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tcpClient = null;
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}
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}
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/// <summary>
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/// Send an IRC message.
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/// </summary>
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/// <param name="message">The message to be sent.</param>
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public void SendMessage(IrcMessage message)
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{
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if (!connected)
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{
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throw new NotConnectedException();
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}
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/* Serialize sending messages */
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lock (typeof(IrcClient))
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{
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NetworkStream networkStream = tcpClient.GetStream();
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byte[] bytes = Encoding.GetBytes(message.Line);
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networkStream.Write(bytes, 0, bytes.Length);
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networkStream.Flush();
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}
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}
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/// <summary>
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/// Monitor when a message with an IRC command is received.
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/// </summary>
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/// <param name="command">IRC command to monitor.</param>
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/// <param name="handler">Handler to call when command is received.</param>
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public void MonitorCommand(string command, MessageReceivedHandler handler)
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{
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if (command == null)
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{
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throw new ArgumentNullException("command", "Command cannot be null.");
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}
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if (handler == null)
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{
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throw new ArgumentNullException("handler", "Handler cannot be null.");
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}
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ircCommandEventRegistrations.Add(new IrcCommandEventRegistration(command, handler));
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}
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/// <summary>
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/// Talk to the channel.
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/// </summary>
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/// <param name="nickname">Nickname of user to talk to.</param>
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/// <param name="text">Text to send to the channel.</param>
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public void TalkTo(string nickname, string text)
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{
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}
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/// <summary>
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/// Change nickname.
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/// </summary>
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/// <param name="nickname">New nickname.</param>
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public void ChangeNick(string nickname)
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{
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if (nickname == null)
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throw new ArgumentNullException("nickname", "Nickname cannot be null.");
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/* NICK <nickname> [ <hopcount> ] */
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SendMessage(new IrcMessage(IRC.NICK, nickname));
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}
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/// <summary>
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/// Submit password to identify user.
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/// </summary>
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/// <param name="password">Password of registered nick.</param>
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private void SubmitPassword(string password)
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{
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if (password == null)
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throw new ArgumentNullException("password", "Password cannot be null.");
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/* PASS <password> */
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SendMessage(new IrcMessage(IRC.PASS, password));
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}
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/// <summary>
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/// Register.
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/// </summary>
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/// <param name="nickname">New nickname.</param>
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/// <param name="password">Password. Can be null.</param>
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/// <param name="realname">Real name. Can be null.</param>
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public void Register(string nickname,
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string password,
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string realname)
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{
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if (nickname == null)
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throw new ArgumentNullException("nickname", "Nickname cannot be null.");
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firstPingReceived = false;
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if (password != null)
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SubmitPassword(password);
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ChangeNick(nickname);
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/* OLD: USER <username> <hostname> <servername> <realname> */
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/* NEW: USER <user> <mode> <unused> <realname> */
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SendMessage(new IrcMessage(IRC.USER, String.Format("{0} 0 * :{1}",
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nickname, realname != null ? realname : "Anonymous")));
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/* Wait for PING for up til 10 seconds */
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int timer = 0;
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while (!firstPingReceived && timer < 200)
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{
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System.Threading.Thread.Sleep(50);
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timer++;
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}
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}
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/// <summary>
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/// Join an IRC channel.
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/// </summary>
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/// <param name="name">Name of channel (without leading #).</param>
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/// <returns>New channel.</returns>
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public IrcChannel JoinChannel(string name)
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{
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IrcChannel channel = new IrcChannel(this, name);
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channels.Add(channel);
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/* JOIN ( <channel> *( "," <channel> ) [ <key> *( "," <key> ) ] ) / "0" */
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SendMessage(new IrcMessage(IRC.JOIN, String.Format("#{0}", name)));
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return channel;
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}
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/// <summary>
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/// Part an IRC channel.
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/// </summary>
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/// <param name="channel">IRC channel. If null, the user parts from all channels.</param>
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/// <param name="message">Part message. Can be null.</param>
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public void PartChannel(IrcChannel channel, string message)
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{
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/* PART <channel> *( "," <channel> ) [ <Part Message> ] */
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if (channel != null)
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{
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SendMessage(new IrcMessage(IRC.PART, String.Format("#{0}{1}",
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channel.Name, message != null ? String.Format(" :{0}", message) : "")));
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channels.Remove(channel);
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}
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else
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{
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string channelList = null;
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foreach (IrcChannel myChannel in Channels)
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{
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if (channelList == null)
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{
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channelList = "";
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}
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else
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{
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channelList += ",";
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}
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channelList += myChannel.Name;
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}
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if (channelList != null)
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{
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SendMessage(new IrcMessage(IRC.PART, String.Format("#{0}{1}",
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channelList, message != null ? String.Format(" :{0}", message) : "")));
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Channels.Clear();
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}
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}
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}
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}
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}
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