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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;
using Tango.FileSystem;
namespace Tango.FSE.Common.FileSystem
{
public class FileSystemHandler : ExtendedObject
{
private Action _abortAction;
private FileSystemHandlerStatus _statusBeforePause;
private System.Timers.Timer _transferRateTimer;
private double _lastPosition;
public event EventHandler<FileSystemHandlerStatus> StatusChanged;
public FileSystemHandlerType Type { get; set; }
private FileSystemHandlerStatus _status;
public FileSystemHandlerStatus Status
{
get { return _status; }
set
{
if (_status != value)
{
_status = value;
RaisePropertyChangedAuto();
StatusChanged?.Invoke(this, _status);
}
}
}
private bool _isPaused;
public bool IsPaused
{
get { return _isPaused; }
set
{
if (_isPaused != value)
{
_isPaused = value;
if (_isPaused)
{
_statusBeforePause = Status;
Status = FileSystemHandlerStatus.Paused;
}
else
{
Status = _statusBeforePause;
}
RaisePropertyChangedAuto();
}
}
}
private double _position;
public double Position
{
get { return _position; }
set { _position = value; RaisePropertyChangedAuto(); }
}
private double _length;
public double Length
{
get { return _length; }
set { _length = value; RaisePropertyChangedAuto(); }
}
private long _transferRate;
public long TransferRate
{
get { return _transferRate; }
set { _transferRate = value; RaisePropertyChangedAuto(); }
}
private Exception _failedException;
public Exception FailedException
{
get { return _failedException; }
set { _failedException = value; RaisePropertyChangedAuto(); }
}
public FileSystemItem FileSystemItem { get; set; }
public String Destination { get; set; }
public String OperationId { get; set; }
public FileSystemHandler(FileSystemHandlerType type, FileSystemItem fileSystemItem, String destination, Action abortAction)
{
Type = type;
FileSystemItem = fileSystemItem;
Destination = destination;
_abortAction = abortAction;
}
private void _transferRateTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
if (Status == FileSystemHandlerStatus.Aborted || Status == FileSystemHandlerStatus.Completed || Status == FileSystemHandlerStatus.Failed)
{
_transferRateTimer.Dispose();
return;
}
TransferRate = (long)(Position - _lastPosition);
_lastPosition = Position;
}
internal void InvalidateProgress(double position, double length)
{
if (_transferRateTimer == null)
{
_transferRateTimer = new System.Timers.Timer(1000);
_transferRateTimer.Elapsed += _transferRateTimer_Elapsed;
_transferRateTimer.Start();
}
Position = position;
Length = length;
if (!IsPaused)
{
Status = (Type == FileSystemHandlerType.FileDownload || Type == FileSystemHandlerType.FolderDownload) ? FileSystemHandlerStatus.Downloading : FileSystemHandlerStatus.Uploading;
}
}
internal void RaiseFailed(Exception exception)
{
Status = FileSystemHandlerStatus.Failed;
FailedException = exception;
}
internal void RaiseAborted()
{
Status = FileSystemHandlerStatus.Aborted;
}
internal void RaiseCompleted()
{
Status = FileSystemHandlerStatus.Completed;
}
public void Abort()
{
Status = FileSystemHandlerStatus.Aborted;
_abortAction?.Invoke();
}
}
}
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