irc/TechBot/TechBot.Library/NtStatusCommand.cs

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