irc/TechBot/TechBot.Library/HresultCommand.cs

   1 using System;
   2 using System.Xml;
   3
   4 namespace TechBot.Library
   5 {
   6         public class HResultCommand : XmlCommand
   7         {
   8         public HResultCommand(TechBotService techBot)
   9             : base(techBot)
  10                 {
  11                 }
  12
  13         public override string XmlFile
  14         {
  15             get { return Settings.Default.HResultXml; }
  16         }
  17
  18         public override string[] AvailableCommands
  19         {
  20             get { return new string[] { "hresult" }; }
  21         }
  22
  23         /*
  24                 public bool CanHandle(string commandName)
  25                 {
  26                         return CanHandle(commandName,
  27                                          new string[] { "hresult" });
  28                 }
  29         */
  30
  31                 public override void Handle(MessageContext context,
  32                                    string commandName,
  33                                    string parameters)
  34                 {
  35                         string hresultText = parameters;
  36                         if (hresultText.Equals(String.Empty))
  37                         {
  38                                 TechBot.ServiceOutput.WriteLine(context,
  39                                                         "Please provide a valid HRESULT value.");
  40                                 return;
  41                         }
  42
  43                         NumberParser np = new NumberParser();
  44                         long hresult = np.Parse(hresultText);
  45                         if (np.Error)
  46                         {
  47                 TechBot.ServiceOutput.WriteLine(context,
  48                                                         String.Format("{0} is not a valid HRESULT value.",
  49                                                                       hresultText));
  50                                 return;
  51                         }
  52
  53                         string description = GetHresultDescription(hresult);
  54                         if (description != null)
  55                         {
  56                 TechBot.ServiceOutput.WriteLine(context,
  57                                                         String.Format("{0} is {1}.",
  58                                                                       hresultText,
  59                                                                       description));
  60                         }
  61                         else
  62                         {
  63                 TechBot.ServiceOutput.WriteLine(context,
  64                                                         String.Format("I don't know about HRESULT {0}.",
  65                                                                       hresultText));
  66                         }
  67                 }
  68
  69                 public override string Help()
  70                 {
  71                         return "!hresult <value>";
  72                 }
  73
  74                 public string GetHresultDescription(long hresult)
  75                 {
  76                         XmlElement root = base.m_XmlDocument.DocumentElement;
  77                         XmlNode node = root.SelectSingleNode(String.Format("Hresult[@value='{0}']",
  78                                                                            hresult.ToString("X8")));
  79                         if (node != null)
  80                         {
  81                                 XmlAttribute text = node.Attributes["text"];
  82                                 if (text == null)
  83                                         throw new Exception("Node has no text attribute.");
  84                                 return text.Value;
  85                         }
  86                         else
  87                                 return null;
  88                 }
  89         }
  90 }