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

/* 
 * Copyright (C) 2004-2005 Jonathan Bindel
 * Copyright (C) 2006-2007 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

using System;
using System.Collections.Generic;
using System.Xml.Serialization;

namespace DCSharp.Backend.Objects{
  public enum Priority
  {
    High,
    Normal,
    Low
  }
  
  public class DownloadEventArgs : EventArgs
  {
    public DownloadEventArgs(DownloadFileInfo download)
    {
      this.download = download;
    }
    
    public DownloadFileInfo Download
    {
      get { return download; }
    }
    private DownloadFileInfo download;
  }
  
  public class DownloadFileInfo : TransferFileInfo
  {
    public event EventHandler<SourceEventArgs> SourceAdded;
    public event EventHandler<SourceEventArgs> SourceRemoved;
    
    #region Constructors
    
    public DownloadFileInfo(string cid) : this(cid, 0, null, null)
    {
      IsFileList = true;
    }
    
    public DownloadFileInfo(string name, long size, string tth, string target) :
      base(name, size, tth)
    {
      this.target = target;
      tempTarget = target;
      
      sources = new List<SourceInfo>();
      priority = Priority.Normal;
    }
    
    public DownloadFileInfo() : base()
    {
      sources = new List<SourceInfo>();
      priority = Priority.Normal;
    }

    #endregion

    #region Properties
    
    [XmlAttribute]
    public string Target
    {
      get { return target; }
      set { target = value; }
    }
    private string target;
    
    [XmlAttribute]
    public string TempTarget
    {
      get { return tempTarget; }
      set { tempTarget = value; }
    }
    private string tempTarget;
    
    [XmlElement("Source")]
    public SourceInfo[] SourceInfos
    {
      get { return sources.ToArray(); }
      set
      {
        sources.Clear();
        if (value != null)
        {
          sources.AddRange(value);
        }
      }
    }
    private List<SourceInfo> sources;
    
    [XmlAttribute]
    public Priority Priority
    {
      get { return priority; }
      set { priority = value; }
    }
    private Priority priority;
    
    #endregion

    #region Methods

    public void Add(SourceInfo source)
    {
      if (source == null)
      {
        throw new ArgumentNullException("source");
      }
      sources.Add(source);
      OnSourceAdded(source);
    }

    public void Remove(SourceInfo source)
    {
      if (source == null)
      {
        throw new ArgumentNullException("source");
      }
      if (sources.Contains(source))
      {
        if (Active && source.Active)
        {
          UserConnection.Disconnect();
        }
        sources.Remove(source);
        OnSourceRemoved(source);
      }
    }
    
    public bool Contains(SourceInfo source)
    {
      return sources.Contains(source);
    }

    public bool HasSource(SourceInfo source)
    {
      return HasSource(source.User, source.Path);
    }

    public bool HasSource(User user)
    {
      return HasSource(user, null);
    }
    
    public bool HasSource(User user, string path)
    {
      SourceInfo source = sources.Find(delegate(SourceInfo s)
      {
        return s.Available && s.User == user &&
          (path == null || s.Path == path);
      });
      return source != null;
    }

    protected virtual void OnSourceAdded(SourceInfo source)
    {
      if (SourceAdded != null)
      {
        SourceAdded(this, new SourceEventArgs(source));
      }
    }

    protected virtual void OnSourceRemoved(SourceInfo source)
    {
      if (SourceRemoved != null)
      {
        SourceRemoved(this, new SourceEventArgs(source));
      }
    }

    #endregion
  }
}