/// <summary>
/// Adds a picture to the DB, generating color swatches beforehand
/// </summary>
/// <param name="picture"></param>
/// <returns>Picture DTO object representing the object created in DB</returns>
public async Task <PictureDTO> AddPicture(PictureDTO picture)
{
// Read the image from stream, convert it to Bitmap, and generate the swatches with it
// in one using simply so that both the image and MemoryStream will dispose after being used
using (var image = (Bitmap)Image.FromStream(new MemoryStream(picture.Contents)))
picture.ColorSwatches = GenerateColorSwatches(image);
var result = await _picturesRepository.AddAsync(picture);
return(result);
}