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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.FSE.Common.Insights
{
public class InsightsHandler : ExtendedObject
{
private Action _abortAction;
private TaskCompletionSource<InsightsPackage> _completionSource;
private bool _completed;
public event EventHandler<InsightsHandlerStatus> StatusChanged;
public event EventHandler<TangoProgressChangedEventArgs<double>> ProgressChanged;
public event EventHandler<InsightsPackage> Completed;
private InsightsHandlerStatus _status;
public InsightsHandlerStatus Status
{
get { return _status; }
set
{
if (_status != value)
{
_status = value;
RaisePropertyChangedAuto();
StatusChanged?.Invoke(this, _status);
}
}
}
private TangoProgress<double> _progress;
public TangoProgress<double> Progress
{
get { return _progress; }
set
{
_progress = value; RaisePropertyChangedAuto();
if (_progress != null)
{
ProgressChanged?.Invoke(this, new TangoProgressChangedEventArgs<double>(_progress));
}
}
}
private Exception _failedException;
public Exception FailedException
{
get { return _failedException; }
set { _failedException = value; RaisePropertyChangedAuto(); }
}
public InsightsHandler(Action abortAction)
{
_completionSource = new TaskCompletionSource<InsightsPackage>();
_abortAction = abortAction;
Progress = new TangoProgress<double>("Initializing...");
}
public void Abort()
{
if (!_completed)
{
_completed = true;
_abortAction?.Invoke();
Status = InsightsHandlerStatus.Aborted;
_completionSource.SetException(new OperationCanceledException());
}
}
public void RaiseFailed(Exception ex)
{
if (!_completed)
{
_completed = true;
FailedException = ex;
Status = InsightsHandlerStatus.Failed;
_completionSource.SetException(ex);
}
}
public void RaiseCompleted(InsightsPackage package)
{
if (!_completed)
{
_completed = true;
Status = InsightsHandlerStatus.Completed;
Completed?.Invoke(this, package);
_completionSource.SetResult(package);
}
}
public Task<InsightsPackage> WaitForCompletion()
{
return _completionSource.Task;
}
}
}
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