- 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/HelpCommand.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections;
+
+namespace TechBot.Library
+{
+    [Command("help", Help = "!help")]
+	public class HelpCommand : Command
+	{
+        private string m_CommandName = null;
+
+        public HelpCommand()
+		{
+		}
+
+        [CommandParameter("Name", "The command name to show help")]
+        public string CommandName
+        {
+            get { return m_CommandName; }
+            set { m_CommandName = value; }
+        }
+
+        public override void ExecuteCommand()
+        {
+            if (CommandName == null)
+            {
+                Say("I support the following commands:");
+
+                foreach (CommandBuilder command in TechBot.Commands)
+                {
+                    Say("!{0} - {1}",
+                        command.Name,
+                        command.Description);
+                }
+            }
+            else
+            {
+                CommandBuilder cmdBuilder = TechBot.Commands.Find(CommandName);
+
+                if (cmdBuilder == null)
+                {
+                    Say("Command '{0}' is not recognized. Type '!help' to show all available commands", CommandName);
+                }
+                else
+                {
+                    Say("Command '{0}' help:", CommandName);
+                    Say("");
+                }
+            }
+        }
+	}
+}