EntryPoint.cs :  » RSS-RDF » RSS-Feeder » RSSFeeder » C# / CSharp Open Source

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C# / C Sharp
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C# / CSharp Open Source » RSS RDF » RSS Feeder 
RSS Feeder » RSSFeeder » EntryPoint.cs
// Copyright  2005 by Omar Al Zabir. All rights are reserved.
// 
// If you like this code then feel free to go ahead and use it.
// The only thing I ask is that you don't remove or alter my copyright notice.
//
// Your use of this software is entirely at your own risk. I make no claims or
// warrantees about the reliability or fitness of this code for any particular purpose.
// If you make changes or additions to this code please mark your code as being yours.
// 
// website http://www.oazabir.com, email OmarAlZabir@gmail.com, msn oazabir@hotmail.com

using System;
using System.IO;
using System.Collections;
using System.Xml;
using System.Xml.Serialization;
using System.Windows.Forms;

namespace RSSFeeder{
  using RSSCommon;
  using RSSCommon.Helper;
  using Helpers;
  using RSSBlogAPI;

  /// <summary>
  /// It all starts now...
  /// </summary>
  public class EntryPoint
  {
    [STAThread]
    public static void Main()
    {
      // Single instance allowed to run 
      if( SingleApplication.IsAlreadyRunning() ) 
      {
        EntLibHelper.Debug("Main", "Already running" );

        SingleApplication.SwitchToCurrentInstance();
        return;
      }

      // Now this line takes too much time, MS needs to make it faster
      EntLibHelper.Debug("Main", "Starting..." );

      // Hook all unhandled exception, we won't go down without a fight
      AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
      Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);

      // XP visual style, makes it look cooler
      Application.EnableVisualStyles();
      Application.DoEvents();

      // Before launching, we need to ensure configuration, check if first time run, etc
      PrelaunchPreparation();

      // Start the app
      Application.Run( new RSSServer() );

      // Freeup database connection
      DatabaseHelper.Close();

      EntLibHelper.Debug("Main", "The End" );
    }

    #region Prelaunch Preparation

    /// <summary>
    /// Check if the application data directory is created, config files are there, whether
    /// this is the first time being launched etc
    /// </summary>
    private static void PrelaunchPreparation()
    {
      #region Log
      EntLibHelper.Debug("PrelaunchPreparation", "Prelaunch preparation...");
      #endregion

      // Prepare the path where all application specific settings will be stored
      string appDataPath =  Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);

      ApplicationSettings.ApplicationDataPath = Path.Combine( appDataPath, ApplicationSettings.MY_FOLDER_NAME );
      //ApplicationSettings.ConfigurationFilePath = Path.Combine( ApplicationSettings.ApplicationDataPath, ApplicationSettings.CONFIG_FILE_NAME );
      ApplicationSettings.DatabaseFilePath = Path.Combine( ApplicationSettings.ApplicationDataPath, ApplicationSettings.DATABASE_NAME );

      // Check if all these paths exist
      if( !Directory.Exists( ApplicationSettings.ApplicationDataPath ) )
      {
        #region Log
        EntLibHelper.Debug("PrelaunchPreparation", "Creating application data directory: " + ApplicationSettings.ApplicationDataPath );
        #endregion
        Directory.CreateDirectory( ApplicationSettings.ApplicationDataPath );
      }

      // Load ocnfiguration
      ConfigurationHelper.LoadGlobalSettings();      
    
      /// If the database does not exist, then we are running for the first time
      if( !File.Exists( ApplicationSettings.DatabaseFilePath ) )
      {
        CreateDatabase( );
  
        // If user alreay using some other RSS aggregators, let's import their
        // setting
        if( Helpers.NewsgatorHelper.IsNewsgatorAround() )
        {
          #region Log
          EntLibHelper.Debug("PrelaunchPreparation", "Newsgator detected");
          #endregion

          using( NewsgatorImport form = new NewsgatorImport() )
          {
            form.ShowDialog();
          }
        }
        
        // Show the statup wizard
        using( StartupWizard form = new StartupWizard() )
        {
          #region Log
          EntLibHelper.Debug("PrelaunchPreparation", "Launching startup wizard");
          #endregion

          form.ShowDialog();
        }
      }
      
      // Copy embedded files
      ConfigurationHelper.CopyFiles();

      // Perform upgrade work
      UpgradeHelper.UpgradeOldVersions();
      
      RegistryHelper.RegisterAtStartup();
    }

    /// <summary>
    /// Create a blank database for storing RSS feed.
    /// </summary>
    private static void CreateDatabase( )
    {
      EntLibHelper.Debug("CreateDatabase", "Creating database: " + ApplicationSettings.DatabaseFilePath );
      SerializationHelper.WriteEmbeddedFile( "RSSFeeder.mdb", ApplicationSettings.DatabaseFilePath );  
    }
    #endregion
    
    #region Main Form Handling

    private static MainForm _MainForm;

    /// <summary>
    /// Closes the mainform 
    /// </summary>
    public static void CloseMainForm()
    {
      if( null != _MainForm )
      {
        _MainForm.Close();
      }
    }
    

    /// <summary>
    /// Show the main form and auto select the specified channel. This function ensures the main
    /// form is displayed only once
    /// </summary>
    /// <param name="channelID"></param>
    public static void ShowMainForm(int channelID)
    {
      if( null != _MainForm )
      {
        _MainForm.Show();
        _MainForm.ShowChannel( channelID );
      }
      else
      {
        _MainForm = new MainForm();
        _MainForm.Show();
        _MainForm.ShowChannel( channelID );
        
        _MainForm.Closed += new EventHandler(_MainForm_Closed);
        _MainForm.Disposed += new EventHandler(_MainForm_Disposed);
      }
    }

    /// <summary>
    /// When the mainform is disposed, detach from it to release it completely
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private static void _MainForm_Disposed(object sender, EventArgs e)
    {
      _MainForm.Disposed -= new EventHandler(_MainForm_Disposed);
      _MainForm = null;

      MemoryHelper.ReduceMemory();
    }

    /// <summary>
    /// When the main form is closed, dispose it
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private static void _MainForm_Closed(object sender, EventArgs e)
    {
      _MainForm.Closed -= new EventHandler(_MainForm_Closed);
      if( !_MainForm.Disposing )
        _MainForm.Dispose();
    }

    #endregion

    #region Web Log Manager Handling

    private static WebLogManager _WebLogManagerForm;

    /// <summary>
    /// Closes the WebLogManagerForm 
    /// </summary>
    public static void CloseWebLogManagerForm()
    {
      if( null != _WebLogManagerForm )
      {
        _WebLogManagerForm.Close();
      }
    }
    

    /// <summary>
    /// Show the main form and auto select the specified channel. This function ensures the main
    /// form is displayed only once
    /// </summary>
    /// <param name="channelID"></param>
    public static void ShowWebLogManagerForm()
    {
      if( null != _WebLogManagerForm )
      {
        _WebLogManagerForm.Show();
      }
      else
      {
        _WebLogManagerForm = new WebLogManager();
        _WebLogManagerForm.Show();
        
        try
        {
          _WebLogManagerForm.SendFeeds += new EventHandler(_WebLogManagerForm_SendFeeds);
          _WebLogManagerForm.Closed += new EventHandler(_WebLogManagerForm_Closed);
          _WebLogManagerForm.Disposed += new EventHandler(_WebLogManagerForm_Disposed);
        }
        catch {}

      }
    }

    /// <summary>
    /// When the WebLogManagerForm is disposed, detach from it to release it completely
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private static void _WebLogManagerForm_Disposed(object sender, EventArgs e)
    {
      _WebLogManagerForm.Disposed -= new EventHandler(_WebLogManagerForm_Disposed);
      _WebLogManagerForm = null;

      MemoryHelper.ReduceMemory();
    }

    /// <summary>
    /// When the main form is closed, dispose it
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private static void _WebLogManagerForm_Closed(object sender, EventArgs e)
    {
      _WebLogManagerForm.SendFeeds -= new EventHandler(_WebLogManagerForm_SendFeeds);
      _WebLogManagerForm.Closed -= new EventHandler(_WebLogManagerForm_Closed);
      if( !_WebLogManagerForm.Disposing )
        _WebLogManagerForm.Dispose();
    }


    private static void _WebLogManagerForm_SendFeeds(object sender, EventArgs e)
    {
      RSSHelper.DownloadChannels( _WebLogManagerForm, new ArrayList(), new EventHandler( _WebLogManagerForm.DownloadCompleteEventHandler ), true );
    }
    #endregion

    #region Blogpaper Handling

    private static Newspaper _NewspaperForm;

    public static void ShowNewspaper( int channelId )
    {
      
      if( null != _NewspaperForm )
      {
        _NewspaperForm.Show();
        _NewspaperForm.ShowChannel( channelId );
      }
      else
      {
        _NewspaperForm = new Newspaper();
        _NewspaperForm.Show();
        _NewspaperForm.ShowChannel( channelId );
        
        _NewspaperForm.Closed += new EventHandler(_NewspaperForm_Closed);
        _NewspaperForm.Disposed += new EventHandler(_NewspaperForm_Disposed);
      }
    }

    /// <summary>
    /// When the mainform is disposed, detach from it to release it completely
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private static void _NewspaperForm_Disposed(object sender, EventArgs e)
    {
      _NewspaperForm.Disposed -= new EventHandler(_NewspaperForm_Disposed);
      _NewspaperForm = null;

      MemoryHelper.ReduceMemory();
    }

    /// <summary>
    /// When the main form is closed, dispose it
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private static void _NewspaperForm_Closed(object sender, EventArgs e)
    {
      _NewspaperForm.Closed -= new EventHandler(_NewspaperForm_Closed);
      if( !_NewspaperForm.Disposing )
        _NewspaperForm.Dispose();

      MemoryHelper.ReduceMemory();
    }


    public static void CloseNewspaper( )
    {
      if( null != _NewspaperForm )
        _NewspaperForm.Close();
    }

    #endregion

    #region Global Exception handling

    private static void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
    {
      EntLibHelper.UnhandledException(e.Exception);
    }

    private static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
    {
      if( e.ExceptionObject is Exception )
        EntLibHelper.UnhandledException(e.ExceptionObject as Exception);
    }

    #endregion
  }
}
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