- code refactoring

- made more and more easily extensible:
   * commands automatically loaded from plugins dlls
   * declarative and automatic command parameter parsing
   * common code moved to base classes
- other fixes

svn path=/trunk/; revision=33344

irc/TechBot/TechBot.Library/Commands/NtStatusCommand.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Xml;
+
+namespace TechBot.Library
+{
+    [Command("ntstatus", Help = "!ntstatus <value>")]
+	public class NtStatusCommand : XmlLookupCommand
+	{
+        public NtStatusCommand()
+		{
+		}
+
+        public override string XmlFile
+        {
+            get { return Settings.Default.NtStatusXml; }
+        }
+
+		public override void ExecuteCommand()
+		{
+            if (Text.Equals(String.Empty))
+			{
+                TechBot.ServiceOutput.WriteLine(Context,
+				                        "Please provide a valid NTSTATUS value.");
+				return;
+			}
+
+			NumberParser np = new NumberParser();
+            long ntstatus = np.Parse(Text);
+			if (np.Error)
+			{
+                TechBot.ServiceOutput.WriteLine(Context,
+				                        String.Format("{0} is not a valid NTSTATUS value.",
+                                                      Text));
+				return;
+			}
+			
+			string description = GetNtstatusDescription(ntstatus);
+			if (description != null)
+			{
+                TechBot.ServiceOutput.WriteLine(Context,
+				                        String.Format("{0} is {1}.",
+                                                      Text,
+				                                      description));
+			}
+			else
+			{
+                TechBot.ServiceOutput.WriteLine(Context,
+				                        String.Format("I don't know about NTSTATUS {0}.",
+                                                      Text));
+			}
+		}
+		
+		public string GetNtstatusDescription(long ntstatus)
+		{
+			XmlElement root = base.m_XmlDocument.DocumentElement;
+			XmlNode node = root.SelectSingleNode(String.Format("Ntstatus[@value='{0}']",
+			                                                   ntstatus.ToString("X8")));
+			if (node != null)
+			{
+				XmlAttribute text = node.Attributes["text"];
+				if (text == null)
+					throw new Exception("Node has no text attribute.");
+				return text.Value;
+			}
+			else
+				return null;
+		}
+	}
+}