feat: articles pagination

internal/infrastructure/useCases/ListArticles.go

@@ -11,21 +11,51 @@ func NewListArticlesUseCase(articleRepository article.Repository, bodyRenderer a
 	return &ListArticlesUseCase{articleRepository, bodyRenderer}
 }
 
-func (u *ListArticlesUseCase) ListOnlineArticles(format article.BodyFormat) ([]article.Article, error) {
-	online := true
-	articles, err := u.articleRepository.FindByFilters(article.Filters{
-		IsOnline: &online,
-	})
-	if err != nil {
-		return nil, err
-	}
-	return renderArticles(u.bodyRenderer, articles, format)
+type ListArticlesCommand struct {
+	Format   article.BodyFormat
+	Verified bool
+	Page     int
+	Size     int
+	Q        string
+	Status   string
+	Sort     article.Sort
 }
 
-func (u *ListArticlesUseCase) ListAllArticles(format article.BodyFormat) ([]article.Article, error) {
-	articles, err := u.articleRepository.FindByFilters(article.Filters{})
+type ArticlePage struct {
+	Items  []article.Article
+	Total  int
+	Page   int
+	Size   int
+	Counts article.Counts
+}
+
+func (u *ListArticlesUseCase) ListArticlesPage(command ListArticlesCommand) (ArticlePage, error) {
+	counts, err := u.articleRepository.CountByVisibility(!command.Verified)
 	if err != nil {
-		return nil, err
+		return ArticlePage{}, err
 	}
-	return renderArticles(u.bodyRenderer, articles, format)
+	page := ArticlePage{Items: []article.Article{}, Page: command.Page, Size: command.Size, Counts: counts}
+	if !command.Verified && command.Status == article.StatusDraft {
+		return page, nil
+	}
+	found, err := u.articleRepository.FindPage(pageFilters(command))
+	if err != nil {
+		return ArticlePage{}, err
+	}
+	rendered, err := renderArticles(u.bodyRenderer, found.Items, command.Format)
+	if err != nil {
+		return ArticlePage{}, err
+	}
+	page.Items = rendered
+	page.Total = found.Total
+	return page, nil
+}
+
+func pageFilters(command ListArticlesCommand) article.Filters {
+	filters := article.Filters{Page: command.Page, Size: command.Size, Q: command.Q, Status: command.Status, Sort: command.Sort}
+	if !command.Verified {
+		online := true
+		filters.IsOnline = &online
+	}
+	return filters
 }