irc/TechBot/TechBot.Library/WmCommand.cs

   1 using System;
   2 using System.Xml;
   3
   4 namespace TechBot.Library
   5 {
   6         public class WmCommand : BaseCommand, ICommand
   7         {
   8                 private IServiceOutput serviceOutput;
   9                 private string wmXml;
  10                 private XmlDocument wmXmlDocument;
  11
  12                 public WmCommand(IServiceOutput serviceOutput,
  13                                  string wmXml)
  14                 {
  15                         this.serviceOutput = serviceOutput;
  16                         this.wmXml = wmXml;
  17                         wmXmlDocument = new XmlDocument();
  18                         wmXmlDocument.Load(wmXml);
  19                 }
  20
  21                 public bool CanHandle(string commandName)
  22                 {
  23                         return CanHandle(commandName,
  24                                          new string[] { "wm" });
  25                 }
  26
  27                 public void Handle(MessageContext context,
  28                                    string commandName,
  29                                    string parameters)
  30                 {
  31                         string wmText = parameters;
  32                         if (wmText.Equals(String.Empty))
  33                         {
  34                                 serviceOutput.WriteLine(context,
  35                                                         "Please provide a valid window message value or name.");
  36                                 return;
  37                         }
  38
  39                         NumberParser np = new NumberParser();
  40                         long wm = np.Parse(wmText);
  41                         string output;
  42                         if (np.Error)
  43                         {
  44                                 // Assume "!wm <name>" form.
  45                                 output = GetWmNumber(wmText);
  46                         }
  47                         else
  48                         {
  49                                 output = GetWmDescription(wm);
  50                         }
  51
  52                         if (output != null)
  53                         {
  54                                 serviceOutput.WriteLine(context,
  55                                                         String.Format("{0} is {1}.",
  56                                                                       wmText,
  57                                                                       output));
  58                         }
  59                         else
  60                         {
  61                                 serviceOutput.WriteLine(context,
  62                                                         String.Format("I don't know about window message {0}.",
  63                                                                       wmText));
  64                         }
  65                 }
  66
  67                 public string Help()
  68                 {
  69                         return "!wm <value> or !wm <name>";
  70                 }
  71
  72                 private string GetWmDescription(long wm)
  73                 {
  74                         XmlElement root = wmXmlDocument.DocumentElement;
  75                         XmlNode node = root.SelectSingleNode(String.Format("WindowMessage[@value='{0}']",
  76                                                                            wm));
  77                         if (node != null)
  78                         {
  79                                 XmlAttribute text = node.Attributes["text"];
  80                                 if (text == null)
  81                                         throw new Exception("Node has no text attribute.");
  82                                 return text.Value;
  83                         }
  84                         else
  85                                 return null;
  86                 }
  87
  88                 private string GetWmNumber(string wmName)
  89                 {
  90                         XmlElement root = wmXmlDocument.DocumentElement;
  91                         XmlNode node = root.SelectSingleNode(String.Format("WindowMessage[@text='{0}']",
  92                                                                            wmName));
  93                         if (node != null)
  94                         {
  95                                 XmlAttribute value = node.Attributes["value"];
  96                                 if (value == null)
  97                                         throw new Exception("Node has no value attribute.");
  98                                 return value.Value;
  99                         }
 100                         else
 101                                 return null;
 102                 }
 103         }
 104 }