UploadManager.cs :  » Business-Application » DC » DCSharp » Backend » Managers » C# / CSharp Open Source

/*
 * Copyright (C) 2007 Eskil Bylund
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

using System;
using System.Collections.Generic;
using System.IO;

using DCSharp.Backend.Connections;
using DCSharp.Backend.Objects;
using DCSharp.Xml;

namespace DCSharp.Backend.Managers{
  public class UploadManager
  {
    private List<UserConnection> uploadConnections;
    
    public UploadManager(ConnectionManager connectionManager)
    {
      if (connectionManager == null)
      {
        throw new ArgumentNullException("connectionManager");
      }
      
      uploadConnections = new List<UserConnection>();
      
      // Events
      connectionManager.ConnectionRemoved += OnConnectionRemoved;
    }
    
    #region Properties
    
    public int ActiveUploads
    {
      get { return uploadConnections.Count; }
    }
    
    #endregion
    
    #region Methods
    
    public bool CanUpload(UserConnection connection, UploadFileInfo upload)
    {
      if (uploadConnections.Contains(connection))
      {
        return true;
      }
      
      // MiniSlots support
      if (upload.IsFileList || upload.Size < 16 * 1024)
      {
        return true;
      }
      
      lock (uploadConnections)
      {
        if (uploadConnections.Count >= Runtime.Settings.Slots)
        {
          return false;
        }
        
        // Has existing connection?
        foreach (UserConnection c in uploadConnections)
        {
          if (c.RemoteIdentity.User == connection.RemoteIdentity.User)
          {
            return false;
          }
        }
        
        uploadConnections.Add(connection);
        return true;
      }
    }
    
    private void OnConnectionRemoved(object obj, ConnectionEventArgs args)
    {
      UserConnection connection = (UserConnection)args.Connection;
      
      lock (uploadConnections)
      {
        uploadConnections.Remove(connection);
      }
    }
    
    #endregion
  }
}