reactos/irc/TechBot/TechBot.Commands.Common/WMCommand.cs

using System;
using System.Xml;

using TechBot.Library;

namespace TechBot.Commands.Common
{
    [Command("wm" , Help = "!wm <value> or !wm <name>")]
	public class WMCommand : XmlCommand
	{
        public WMCommand()
		{
		}

        public override string XmlFile
        {
            get { return Settings.Default.WMXml; }
        }
		
        [CommandParameter("wm", "The windows message to check" , DefaultParameter = true)]
        public string WMText
        {
            get { return Parameters; }
            set { Parameters = value; }
        }

		public override void ExecuteCommand()
		{
            if (string.IsNullOrEmpty(WMText))
            {
                Say("Please provide a valid window message value or name.");

            }
            else
            {
                NumberParser np = new NumberParser();
                long wm = np.Parse(WMText);
                string output;
                if (np.Error)
                {
                    // Assume "!wm <name>" form.
                    output = GetWmNumber(WMText);
                }
                else
                {
                    output = GetWmDescription(wm);
                }

                if (output != null)
                {
                    Say("{0} is {1}.",
                         WMText,
                         output);
                }
                else
                {
                    Say("I don't know about window message {0}.", WMText);
                }
            }
		}

		private string GetWmDescription(long wm)
		{
			XmlElement root = base.m_XmlDocument.DocumentElement;
			XmlNode node = root.SelectSingleNode(String.Format("WindowMessage[@value='{0}']",
			                                                   wm));
			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;
		}
		
		private string GetWmNumber(string wmName)
		{
			XmlElement root = base.m_XmlDocument.DocumentElement;
			XmlNode node = root.SelectSingleNode(String.Format("WindowMessage[@text='{0}']",
			                                                   wmName));
			if (node != null)
			{
				XmlAttribute value = node.Attributes["value"];
				if (value == null)
					throw new Exception("Node has no value attribute.");
				return value.Value;
			}
			else
				return null;
		}
	}
}