internal/domain/article/articleDomain.go

@@ -7,6 +7,7 @@ import (
 )
 
 var (
+	ErrInvalidTitle    = errors.New("article's title length should be between 3 and 200 caracters")
 	ErrArticleNotFound = errors.New("article not found")
 	ErrArticleOffline  = errors.New("article is offline")
 )

internal/infrastructure/persistence/repositories/articleRepository.go

@@ -58,6 +58,7 @@ func (a *ArticleRepository) Create(article domain.Article) (domain.Article, erro
 	creationResult := a.db.Create(&entity.Article{
 		Title:    article.Title,
 		Body:     article.Body,
+		IsOnline: article.IsOnline,
 	})
 	if creationResult.Error != nil {
 		return domain.Article{}, creationResult.Error

internal/infrastructure/useCases/CreateArticle.go

@@ -18,8 +18,13 @@ func NewCreateArticleUseCase(articleRepository article.Repository) *CreateArticl
 }
 
 func (g *CreateArticleUseCase) CreateArticle(createArticle CreateArticleCommand) (article.Article, error) {
+	if len(createArticle.Title) < 3 || len(createArticle.Title) > 200 {
+		return article.Article{}, article.ErrInvalidTitle
+	}
+
 	return g.articleRepository.Create(article.Article{
 		Title:    createArticle.Title,
 		Body:     createArticle.Body,
+		IsOnline: false,
 	})
 }