gistfile1.scala

  def getArticleDetails(articleName: String): Future[\/[ArticleNotFound.type, ArticleDetails]] = {
    val r = for {
      articleId <- EitherT(articleService.getArticleIdByUniqueName(articleName))
      article <- EitherT(articleService.getArticleDetails(articleId))
    } yield article
    r.run
  }