Circ.Lib/Backend/Rfc.cs

   1 #region License
   2 /* Circ.Lib : main library behind Circ
   3  * Copyright (C) 2007  LAVAL Jérémie
   4  *
   5  * This file is licensed under the terms of the LGPL.
   6  *
   7  * For the complete licence see the file COPYING.
   8  */
   9 #endregion
  10 using System;
  11 using System.Collections.Generic;
  12 using System.Text;
  13
  14 namespace Circ.Backend
  15 {
  16         public static class Rfc
  17         {
  18                 public const string Crlf = "\r\n";
  19                 public const int    MaxSize = 512;
  20                 public const char   OperatorChar = '@';
  21                 public const int    IdentDefaultPort = 113;
  22                 public const string IdentAnswer = " : USERID : UNIX : ";
  23
  24                 // Consts reply code
  25                 public const int NamesReply = 353;
  26                 public const int TopicReply = 332;
  27
  28                 private static StringBuilder sb = new StringBuilder(30);
  29
  30                 public static bool IsMessageTooLong(string message)
  31                 {
  32             if (string.IsNullOrEmpty(message))
  33                 throw new ArgumentNullException("message");
  34
  35                         return message.Length > MaxSize;
  36                 }
  37
  38                 public static string[] AdaptMessageSize(string message)
  39                 {
  40                         if (!IsMessageTooLong(message))
  41                                 return new string[] { message };
  42
  43                         int overflow = message.Length - MaxSize;
  44                         IList<string> messageList = new List<string>();
  45                         string[] temp = null;
  46
  47                         messageList.Add(message.Substring(0, MaxSize));
  48
  49                         if (overflow > MaxSize)
  50                                 foreach (string s in AdaptMessageSize(message.Substring(0, MaxSize + 1)))
  51                                         messageList.Add(s);
  52                         else {
  53                                 messageList.Add(message.Substring(0, message.LastIndexOf(':') + 1) + message.Substring(MaxSize));
  54                                 temp = new string[messageList.Count];
  55                                 messageList.CopyTo(temp, 0);
  56                         }
  57                         return temp;
  58                 }
  59
  60                 /// <summary>
  61                 /// Concatenate a command and its parameter and add a trailing CRLF sequence.
  62                 /// </summary>
  63                 private static string FormatString(params object[] param)
  64                 {
  65                         sb.Remove(0, sb.Length);
  66                         int i = 0;
  67                         foreach (object s in param) {
  68                                 sb.Append(s.ToString());
  69                                 if (++i < param.Length)
  70                                         sb.Append(' ');
  71                         }
  72                         sb.Append(Crlf);
  73                         return sb.ToString();
  74                 }
  75
  76 #region Standard command
  77                 public static string Pass(string password)
  78                 {
  79                         return FormatString("PASS", password);
  80                 }
  81
  82                 public static string Nick(string nickname)
  83                 {
  84                         return FormatString("NICK", nickname);
  85                 }
  86
  87                 public static string User(string name, string realName)
  88                 {
  89                         return FormatString("USER", name, name, "irc.epiknet.org", ':'+realName);
  90                 }
  91
  92                 public static string Quit(string quitMessage)
  93                 {
  94                         if (string.IsNullOrEmpty(quitMessage))
  95                                 return FormatString("QUIT");
  96                         return FormatString("QUIT", quitMessage);
  97                 }
  98
  99                 public static string Pong(string args)
 100                 {
 101                         return FormatString("PONG", args);
 102                 }
 103
 104                 public static string Join(string chan)
 105                 {
 106                         return FormatString("JOIN", chan);
 107                 }
 108
 109                 public static string Part(string channel, string quitMessage)
 110                 {
 111                         if (string.IsNullOrEmpty(quitMessage))
 112                                 return FormatString("PART", channel);
 113                         return FormatString("PART", channel, quitMessage);
 114                 }
 115
 116                 public static string PrivMsg(string target, string mess)
 117                 {
 118                         return FormatString("PRIVMSG", target, ':'+mess);
 119                 }
 120 #endregion
 121         }
 122 }