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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;
namespace Tango.Integration.Storage
{
public class StorageFileHandler : ExtendedObject
{
private Action _cancelAction;
public event EventHandler<StorageFileHandlerProgressEventArgs> Progress;
public event EventHandler Completed;
public event EventHandler Canceled;
public event EventHandler<Exception> Failed;
internal StorageFileHandler()
{
}
internal StorageFileHandler(StorageFile storageFile, Action cancelAction)
{
_cancelAction = cancelAction;
StorageFile = storageFile;
}
public StorageFile StorageFile { get; set; }
private StorageFileHandlerStatus _status;
public StorageFileHandlerStatus Status
{
get { return _status; }
private set { _status = value; RaisePropertyChangedAuto(); }
}
private long _current;
public long Current
{
get { return _current; }
internal set
{
long previous = _current;
_current = value; RaisePropertyChangedAuto();
Progress?.Invoke(this, new StorageFileHandlerProgressEventArgs()
{
Current = _current,
Total = _total,
Delta = _current - previous,
});
if (Status != StorageFileHandlerStatus.Active)
{
Status = StorageFileHandlerStatus.Active;
}
}
}
private long _total;
public long Total
{
get { return _total; }
internal set { _total = value; RaisePropertyChangedAuto(); }
}
public bool IsPaused { get; set; }
public Task Cancel()
{
return Task.Factory.StartNew(() =>
{
_cancelAction.Invoke();
Status = StorageFileHandlerStatus.Canceled;
});
}
internal void RaiseCompleted()
{
Status = StorageFileHandlerStatus.Completed;
Completed?.Invoke(this, new EventArgs());
}
internal void RaiseCanceled()
{
Status = StorageFileHandlerStatus.Canceled;
Canceled?.Invoke(this, new EventArgs());
}
internal void RaiseFailed(Exception ex)
{
Status = StorageFileHandlerStatus.Failed;
Failed?.Invoke(this, ex);
}
}
}
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