// Copyright 2010 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;
using System.Collections;
using System.Reflection;
namespace PersistExtensionAddIn
{
  public class LogExtension : ESRI.ArcGIS.Desktop.AddIns.Extension
  {
    Dictionary<string, string> _log;

    public LogExtension()
    {
    }

    protected override void OnStartup()
    {
      WireDocumentEvents();
    }

    private void WireDocumentEvents()
    {
      // Named event handler
      ArcMap.Events.OpenDocument += new ESRI.ArcGIS.ArcMapUI.IDocumentEvents_OpenDocumentEventHandler(Events_OpenDocument);
    }


    void Events_OpenDocument()
    {
      string logText = "Document was saved by " + _log["userName"]
                            + " at " + _log["time"];
      LogMessage(logText);
    }

    //Get called when saving document.
    protected override void OnSave(Stream outStrm)
    {
        // Override OnSave and uses a binary formatter to serialize the log.
      Dictionary<string, string> log = new Dictionary<string, string>();
      log.Add("userName", Environment.UserName);
      log.Add("time", DateTime.Now.ToLongTimeString());
      var bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
      bf.Serialize(outStrm, log);
    }
    
    //Get called when opening a document with persisted stream.
    protected override void OnLoad(Stream inStrm)
    {
        // Override OnLoad and uses a binary formatter to deserialize the log.
      var bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
      _log = (Dictionary<string, string>)bf.Deserialize(inStrm);
    }

    private void LogMessage(string message)
    {
      System.Windows.Forms.MessageBox.Show(message);
    }
  }

}