// GET api/posts/5
        public async Task<HttpResponseMessage> Get(int id)
        {
            HttpResponseMessage result;
            ClaimsPrincipal user = User as ClaimsPrincipal;
            Claim userIdClaim = user.Claims.FirstOrDefault(claim => claim.Type == ClaimTypes.NameIdentifier);

            if (userIdClaim == null || string.IsNullOrEmpty(userIdClaim.Value))
            {
                result = Request.CreateResponse(HttpStatusCode.InternalServerError);
            }
            else
            {
                BlogPost blogPost = await RavenSession.LoadAsync<BlogPost>(id);
                if (blogPost == null)
                {
                    result = Request.CreateResponse(HttpStatusCode.NotFound);
                }
                else
                {
                    if (userIdClaim.Value.Equals(blogPost.AuthorId, StringComparison.InvariantCultureIgnoreCase) == false)
                    {
                        // TODO: Log here
                        // Basically, the blogPost author is not the one who has been authenticated. return 404 for security reasons.
                        result = Request.CreateResponse(HttpStatusCode.NotFound);
                    }
                    else
                    {
                        PostModel post = new PostModel(blogPost, GetCategoryScheme());
                        result = Request.CreateResponse(HttpStatusCode.OK, post);
                    }
                }
            }

            return result;
        }
 private void Enrich(PostModel post, UrlHelper url)
 {
     string selfUrl = url.Link("DefaultApi", new { controller = "posts", id = post.Id });
     post.AddLink(new SelfLink(selfUrl));
     post.AddLink(new EditLink(selfUrl));
 }