Blog.Logic.Core.PostsLogic.EntityToDtoPostCleanUp C# (CSharp) Method

        public Post EntityToDtoPostCleanUp(DataAccess.Database.Entities.Objects.Post db, int postId)
        {
            // clean up the data fetched from db to avoid stack overflow
            if (db.Communities != null)
            {
                foreach (var community in db.Communities)
                {
                    community.Leader = null;
                    community.Members = null;
                    community.Posts = null;
                }
            }

            if (db.User != null)
            {
                db.User.CreatedCommunities = null;
                db.User.JoinedCommunities = null;
                db.User.Posts = null;
            }

            var postContents = new List<PostContent>();
            if (db.PostContents != null)
            {
                foreach (var content in db.PostContents)
                {
                    content.Post = null;
                    if (content.Media != null)
                    {
                        content.Media.MediaPath = null;
                        content.Media.ThumbnailPath = null;
                    }
                    postContents.Add(PostContentMapper.ToDto(content));
                }
            }
            else
            {
                var dbContents = _postContentRepository.Find(a => a.PostId == postId, true).ToList();
                dbContents.ForEach(a =>
                {
                    a.Post = null;
                    if (a.Media != null)
                    {
                        a.Media.MediaPath = null;
                        a.Media.ThumbnailPath = null;
                    }
                    postContents.Add(PostContentMapper.ToDto(a));
                });
            }

            var post = PostMapper.ToDto(db);

            if (post.User != null)
            {
                if (post.User.PictureId != null)
                    post.User.Picture = MediaMapper.ToDto(_mediaRepository.Find(b => b.MediaId == (int)post.User.PictureId, false).FirstOrDefault());
                if (post.User.BackgroundId != null)
                    post.User.Background = MediaMapper.ToDto(_mediaRepository.Find(b => b.MediaId == (int)post.User.BackgroundId, false).FirstOrDefault());
            }
           
            post.PostContents = postContents;

            return post;
        }
    }