/// <summary>
/// Initializes a new instance of the <see cref="SensusUI.ShareLocalDataStorePage"/> class.
/// </summary>
/// <param name="localDataStore">Local data store to display.</param>
public ShareLocalDataStorePage(LocalDataStore localDataStore)
{
_cancellationTokenSource = new CancellationTokenSource();
Title = "Sharing Local Data Store";
StackLayout contentLayout = new StackLayout
{
Orientation = StackOrientation.Vertical,
VerticalOptions = LayoutOptions.FillAndExpand
};
Label statusLabel = new Label
{
FontSize = 20,
HorizontalOptions = LayoutOptions.FillAndExpand
};
contentLayout.Children.Add(statusLabel);
ProgressBar progressBar = new ProgressBar
{
Progress = 0,
HorizontalOptions = LayoutOptions.FillAndExpand
};
contentLayout.Children.Add(progressBar);
Button cancelButton = new Button
{
Text = "Cancel",
FontSize = 20,
HorizontalOptions = LayoutOptions.FillAndExpand
};
cancelButton.Clicked += async(o, e) =>
{
await Navigation.PopAsync();
};
contentLayout.Children.Add(cancelButton);
new Thread(() =>
{
string sharePath = UiBoundSensusServiceHelper.Get(true).GetSharePath(".json");
bool errorWritingShareFile = false;
try
{
// step 1: gather data.
Device.BeginInvokeOnMainThread(() => statusLabel.Text = "Gathering data...");
List <Datum> localData = localDataStore.GetDataForRemoteDataStore(_cancellationTokenSource.Token, progress =>
{
Device.BeginInvokeOnMainThread(() =>
{
progressBar.ProgressTo(progress, 250, Easing.Linear);
});
});
// step 2: write gathered data to file.
if (!_cancellationTokenSource.IsCancellationRequested)
{
Device.BeginInvokeOnMainThread(() =>
{
progressBar.ProgressTo(0, 0, Easing.Linear);
statusLabel.Text = "Writing data to file...";
});
using (StreamWriter shareFile = new StreamWriter(sharePath))
{
shareFile.WriteLine("[");
int dataWritten = 0;
foreach (Datum localDatum in localData)
{
if (_cancellationTokenSource.IsCancellationRequested)
{
break;
}
shareFile.Write((dataWritten++ == 0 ? "" : "," + Environment.NewLine) + localDatum.GetJSON(localDataStore.Protocol.JsonAnonymizer));
if (localData.Count >= 10 && (dataWritten % (localData.Count / 10)) == 0)
{
Device.BeginInvokeOnMainThread(() => progressBar.ProgressTo(dataWritten / (double)localData.Count, 250, Easing.Linear));
}
}
shareFile.WriteLine(Environment.NewLine + "]");
shareFile.Close();
}
}
}
catch (Exception ex)
{
errorWritingShareFile = true;
string message = "Error writing share file: " + ex.Message;
UiBoundSensusServiceHelper.Get(true).FlashNotificationAsync(message);
UiBoundSensusServiceHelper.Get(true).Logger.Log(message, LoggingLevel.Normal, GetType());
}
if (_cancellationTokenSource.IsCancellationRequested || errorWritingShareFile)
{
// always delete the file on cancel / error
try
{
File.Delete(sharePath);
}
catch (Exception)
{
}
// the only way to get a cancellation event is to back out of the window, so only pop if there was an error
if (errorWritingShareFile)
{
Device.BeginInvokeOnMainThread(async() => await Navigation.PopAsync());
}
}
else
{
Device.BeginInvokeOnMainThread(async() =>
{
await Navigation.PopAsync();
UiBoundSensusServiceHelper.Get(true).ShareFileAsync(sharePath, "Sensus Data");
});
}
}).Start();
Content = new ScrollView
{
Content = contentLayout
};
}
public ShareLocalDataStorePage(LocalDataStore localDataStore)
{
_cancel = false;
Title = "Sharing Local Data Store";
StackLayout contentLayout = new StackLayout
{
Orientation = StackOrientation.Vertical,
VerticalOptions = LayoutOptions.FillAndExpand
};
Label statusLabel = new Label
{
FontSize = 20,
HorizontalOptions = LayoutOptions.FillAndExpand
};
contentLayout.Children.Add(statusLabel);
ProgressBar progressBar = new ProgressBar
{
Progress = 0,
HorizontalOptions = LayoutOptions.FillAndExpand
};
contentLayout.Children.Add(progressBar);
Button cancelButton = new Button
{
Text = "Cancel",
FontSize = 20,
HorizontalOptions = LayoutOptions.FillAndExpand
};
cancelButton.Clicked += async(o, e) =>
{
await Navigation.PopAsync();
};
contentLayout.Children.Add(cancelButton);
new Thread(async() =>
{
string sharePath = UiBoundSensusServiceHelper.Get(true).GetSharePath(".json");
bool errorWritingShareFile = false;
try
{
Device.BeginInvokeOnMainThread(() => statusLabel.Text = "Gathering data...");
List <Datum> localData = localDataStore.GetDataForRemoteDataStore(progress =>
{
Device.BeginInvokeOnMainThread(() =>
{
progressBar.ProgressTo(progress, 250, Easing.Linear);
});
}, () =>
{
return(_cancel);
});
Device.BeginInvokeOnMainThread(() =>
{
progressBar.ProgressTo(0, 0, Easing.Linear);
statusLabel.Text = "Writing data to file...";
});
using (StreamWriter shareFile = new StreamWriter(sharePath))
{
int dataWritten = 0;
foreach (Datum datum in localData)
{
shareFile.WriteLine(datum.GetJSON(localDataStore.Protocol.JsonAnonymizer));
if ((++dataWritten % (localData.Count / 10)) == 0)
{
Device.BeginInvokeOnMainThread(() => progressBar.ProgressTo(dataWritten / (double)localData.Count, 250, Easing.Linear));
}
}
shareFile.Close();
}
}
catch (Exception ex)
{
errorWritingShareFile = true;
string message = "Error writing share file: " + ex.Message;
SensusServiceHelper.Get().FlashNotificationAsync(message);
SensusServiceHelper.Get().Logger.Log(message, LoggingLevel.Normal, GetType());
await Navigation.PopAsync();
}
if (!_cancel && !errorWritingShareFile)
{
Device.BeginInvokeOnMainThread(async() => await Navigation.PopAsync());
SensusServiceHelper.Get().ShareFileAsync(sharePath, "Sensus Data");
}
}).Start();
Content = new ScrollView
{
Content = contentLayout
};
}
