public IEnumerable <ImageDTO> GetImagesByUser(Guid userId)
{
if (userId == null)
{
throw new ArgumentNullException("user id is null");
}
try
{
usersDAL.GetUserById(userId);
}
catch (Exception e)
{
throw new ArgumentException("user id is incorrect, user doesn't exist", e);
}
return(imagesDAL.GetAllImages().Join(relationsDAL.GetImagesIdsByUserId(userId),
image => image.Id, imageId => imageId, (image, imageId) => new ImageDTO
{
Id = imageId, DateOfCreating = image.DateOfCreating, Description = image.Description
}));
}
public IEnumerable <ImageDTO> GetAllImages()
{
return(imagesDAL.GetAllImages());
}