Circ.Lib/Backend/DefaultParser.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.Text.RegularExpressions;
  12
  13 namespace Circ.Backend
  14 {
  15         /// <summary>
  16         /// A very basic parser. Not optimized at all !
  17         /// </summary>
  18         public class DefaultParser: IParser
  19         {
  20                 static Regex privmsg = new Regex(@"^:.+!.+ PRIVMSG .*", RegexOptions.Compiled | RegexOptions.CultureInvariant);
  21                 static Regex reply = new Regex(@"^:.+ \d{3}.*", RegexOptions.Compiled | RegexOptions.CultureInvariant);
  22
  23                 /// <summary>
  24                 /// Retrieve the Author of a message
  25                 /// </summary>
  26                 /// <remarks>You MUST make sure that the raw irc message is a private message before calling this</remarks>
  27                 /// <seealso cref="RetrieveMessageType(string)">For checking if the message is a classic message</seealso>
  28                 public string RetrieveAuthor(string rawMessage)
  29                 {
  30                         return rawMessage.Substring(1, rawMessage.IndexOf('!')-1);
  31                 }
  32
  33                 public string RetrieveMessage(string rawMessage)
  34                 {
  35                         string param = RetrieveParameters(rawMessage);
  36                         return param.Substring(param.IndexOf(':')+1);
  37                 }
  38
  39                 public string RetrieveMessageTarget(string rawMessage)
  40                 {
  41                         string param = RetrieveParameters(rawMessage);
  42                         return param.Substring(0, param.IndexOf(' '));
  43                 }
  44
  45                 /// <summary>
  46                 /// Retrieve the type of the raw irc message
  47                 /// </summary>
  48                 /// <remarks>The raw message returned by a IrcConnection instance</remarks>
  49                 public MessageType RetrieveMessageType(string rawMessage)
  50                 {
  51                         if (rawMessage.Substring(rawMessage.IndexOf(' ')+1, 6).ToUpperInvariant() == "NOTICE")
  52                                 return MessageType.Notice;
  53                         else if (privmsg.IsMatch(rawMessage))
  54                                 return MessageType.PrivateMessage;
  55                         else if (reply.IsMatch(rawMessage))
  56                                 return MessageType.Reply;
  57
  58                         return MessageType.Action;
  59                 }
  60
  61                 public ActionType RetrieveAction(string rawMessage)
  62                 {
  63                         string action = StripFirstColon(rawMessage);
  64                         action = action.Substring(0, action.IndexOf(' ')).ToUpperInvariant();
  65                         ActionType temp;
  66
  67                         switch (action) {
  68                                 case "PING":
  69                                         temp = ActionType.Ping;
  70                                         break;
  71                                 default:
  72                                         temp = (ActionType)0;
  73                                         break;
  74                         }
  75                         return temp;
  76                 }
  77
  78                 public string RetrieveParameters(string rawMessage)
  79                 {
  80                         string param = StripFirstColon(rawMessage);
  81                         param = param.Substring(param.IndexOf(' ')+1);
  82                         return param;
  83                 }
  84
  85                 public string RetrieveNoticeText(string rawMessage)
  86                 {
  87                         string noticeMessage = StripFirstColon(rawMessage);
  88                         return noticeMessage.Substring(noticeMessage.IndexOf(':')+1);
  89                 }
  90
  91                 public int RetrieveNumericalReply(string rawMessage)
  92                 {
  93                         string num = StripFirstColon(rawMessage).Substring(0, 3);
  94                         int result;
  95                         int.TryParse(num, out result);
  96                         return result;
  97                 }
  98
  99                 public string[] RetrieveUsersList(string rawMessage)
 100                 {
 101                         string namesList = StripFirstColon(rawMessage);
 102                         namesList = namesList.Substring(namesList.IndexOf(':') + 1);
 103                         return namesList.Split(' ');
 104                 }
 105
 106                 public string RetrieveTopic(string rawMessage)
 107                 {
 108                         string top = rawMessage.Substring(rawMessage.IndexOf('#'));
 109                         return top.Substring(top.IndexOf(':') + 1);
 110                 }
 111
 112                 public string RetrieveChannelTarget(string rawMessage)
 113                 {
 114                         string temp = rawMessage.Substring(rawMessage.IndexOf('#'));
 115                         return temp.Substring(0, temp.IndexOf(' '));
 116                 }
 117
 118                 public string StripFirstColon(string rawString)
 119                 {
 120                         if (rawString[0] != ':')
 121                                 return rawString;
 122
 123                         return rawString.Substring(rawString.IndexOf(' ')+1);
 124                 }
 125         }
 126 }