private ActionResult Navigate(Topic topic, NavigationParameter navigationParameter, ENavigationDirection navigationDirection)
{
#region validation
CheckMandatoryParameter(nameof(navigationParameter), navigationParameter);
#endregion
// create naviation result
ImageNavigationResultView result = GetImageLabelNavigationResult(topic, navigationParameter, navigationDirection);
if (result != null)
{
return(Ok(result));
}
return(NotFound(Messages.ImageNotFound((uint)navigationParameter.Index)));
}
private ImageNavigationResultView GetImageLabelNavigationResult(Topic topic, NavigationParameter navigationParameter, ENavigationDirection navigationDirection)
{
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
sw.Start();
// fill imagelabel-structure of image label
ImageNavigationResult image = NavigationService.Navigate(topic, navigationParameter.Index, navigationParameter.LabelMode, navigationDirection);
// default navigation if not label was found on navigation to blank
if (image == null && (navigationDirection == ENavigationDirection.Blank || navigationDirection == ENavigationDirection.LastBlank))
{
image = NavigationService.Navigate(topic, navigationParameter.Index, navigationParameter.LabelMode, ENavigationDirection.Direct);
}
if (image == null)
{
// return http-404 if no label found
return(null);
}
// create naviation result
ImageNavigationResultView navigationResult = ImageNavigationResultFactory.CreateView(image);
switch (navigationParameter.LabelMode)
{
case ELabelMode.ObjectDetection:
if (image.ImageLabel.HasLabels)
{
IEnumerable <Label> labels = LabelService.GetLabels(topic, image.ImageLabel);
navigationResult.ImageLabel.Labels = labels.Select(LabelFactory.CreateView);
}
break;
}
sw.Stop();
Log.Information($"Navigation takes {sw.ElapsedMilliseconds} ms");
return(navigationResult);
}
