/// <summary>
/// Updates the square rectangle of the media.
/// </summary>
public async Task UpdateThumbnailAsync(string key, RectVM vm)
{
Validate(vm, "thumbnail rectangle");
var media = await _db.Media
.Include(x => x.Tags)
.FirstOrDefaultAsync(x => x.Key == key);
if (media == null)
{
throw new OperationException($"Media '{key}' does not exist.");
}
var rect = _mapper.Map <Rect>(vm);
if (media.ThumbnailRect.Equals(rect))
{
return;
}
media.ThumbnailRect = rect;
await _db.SaveChangesAsync();
await _jobSvc.RunAsync(JobBuilder.For <UpdateThumbnailJob>().WithArgs(media.Key));
}
/// <summary>
/// Validates a rectangle.
/// </summary>
private void Validate(RectVM vm, string descr)
{
if (vm == null)
{
throw new OperationException("Rect is not specified for " + descr);
}
vm.X = Clamp(vm.X);
vm.Y = Clamp(vm.Y);
vm.Width = Clamp(vm.Width);
vm.Height = Clamp(vm.Height);
if (vm.X + vm.Width > 1)
{
vm.Width = Clamp(1 - vm.X);
}
if (vm.Y + vm.Height > 1)
{
vm.Height = Clamp(1 - vm.Y);
}
double Clamp(double value)
{
if (value < 0)
{
return(0);
}
if (value > 1)
{
return(1);
}
return(value);
}
}
public Task UpdateThumbnail(string key, [FromBody] RectVM rect)
{
return(_mediaMgr.UpdateThumbnailAsync(key, rect));
}