public IEnumerable <Label> GetLabels(Topic topic, ImageLabel image)
{
#region validation
if (topic == null)
{
throw new ArgumentNullException(nameof(topic));
}
if (image == null)
{
throw new ArgumentNullException(nameof(image));
}
#endregion
IEnumerable <Label> labels = FileSession.Execute((fileName, filePath) =>
{
if (!FileContainer.ExistsFile(fileName, filePath))
{
return(new List <Label>());
}
using (Stream labelFileStream = FileContainer.GetFileStream(fileName, filePath))
{
return(LabelStoreUtil.GetLabelsFromStream(labelFileStream));
}
}, image.GetLabelFileName(), GetLabelsPath(topic));
image.SetLabels(labels);
return(labels);
}
public void DeleteLabels(Topic topic, ImageLabel image)
{
#region validation
if (topic == null)
{
throw new ArgumentNullException(nameof(topic));
}
if (image == null)
{
throw new ArgumentNullException(nameof(image));
}
#endregion
FileContainer.DeleteFile(image.GetLabelFileName(), GetLabelsPath(topic));
}
public IEnumerable <Label> AddLabels(Topic topic, ImageLabel image, IEnumerable <Label> labels)
{
#region validation
if (topic == null)
{
throw new ArgumentNullException(nameof(topic));
}
if (image == null)
{
throw new ArgumentNullException(nameof(image));
}
if (labels == null)
{
throw new ArgumentNullException(nameof(labels));
}
#endregion
// set id for labels
foreach (Label label in labels)
{
label.Id = labels.GetNext(o => o.Id) + 1;
}
FileSession.Execute((fileName, filePath) =>
{
image.Labels = labels.ToList();
byte[] labelFileContent = image.GetLabelsAsByte();
FileContainer.CreateFile(fileName, labelFileContent, filePath);
return(true);
}, image.GetLabelFileName(), GetLabelsPath(topic));
return(labels);
}