using System; using System.Xml; namespace TechBot.Library { public class HresultCommand : BaseCommand, ICommand { private IServiceOutput serviceOutput; private string hresultXml; private XmlDocument hresultXmlDocument; public HresultCommand(IServiceOutput serviceOutput, string hresultXml) { this.serviceOutput = serviceOutput; this.hresultXml = hresultXml; hresultXmlDocument = new XmlDocument(); hresultXmlDocument.Load(hresultXml); } public bool CanHandle(string commandName) { return CanHandle(commandName, new string[] { "hresult" }); } public void Handle(MessageContext context, string commandName, string parameters) { string hresultText = parameters; if (hresultText.Equals(String.Empty)) { serviceOutput.WriteLine(context, "Please provide a valid HRESULT value."); return; } NumberParser np = new NumberParser(); long hresult = np.Parse(hresultText); if (np.Error) { serviceOutput.WriteLine(context, String.Format("{0} is not a valid HRESULT value.", hresultText)); return; } string description = GetHresultDescription(hresult); if (description != null) { serviceOutput.WriteLine(context, String.Format("{0} is {1}.", hresultText, description)); } else { serviceOutput.WriteLine(context, String.Format("I don't know about HRESULT {0}.", hresultText)); } } public string Help() { return "!hresult "; } public string GetHresultDescription(long hresult) { XmlElement root = hresultXmlDocument.DocumentElement; XmlNode node = root.SelectSingleNode(String.Format("Hresult[@value='{0}']", hresult.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; } } }