refac: mappers, file names

api/handlers/article/articleHandler.go

@@ -0,0 +1,106 @@
+package article
+
+import (
+	"RenewCMS/api/pkg/apperr"
+	validator "RenewCMS/api/pkg/validator"
+	domainArticle "RenewCMS/internal/domain/article"
+	"RenewCMS/internal/infrastructure/useCases"
+	"encoding/json"
+	"net/http"
+	"strconv"
+
+	"github.com/go-chi/chi/v5"
+)
+
+type Handler struct {
+	CreateUseCase *useCases.CreateArticleUseCase
+	GetUseCase    *useCases.GetArticleUseCase
+	ListUseCase   *useCases.ListArticlesUseCase
+	DeleteUseCase *useCases.DeleteArticleUseCase
+}
+
+type PostArticle struct {
+	Title string `json:"title" validate:"required,min=3,max=50"`
+	Body  string `json:"body" validate:"required,max=10000"`
+}
+
+func NewHandler(create *useCases.CreateArticleUseCase, get *useCases.GetArticleUseCase, list *useCases.ListArticlesUseCase, delete *useCases.DeleteArticleUseCase) *Handler {
+	return &Handler{
+		CreateUseCase: create,
+		GetUseCase:    get,
+		ListUseCase:   list,
+		DeleteUseCase: delete,
+	}
+}
+
+func (h *Handler) GetArticle(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.ParseUint(chi.URLParam(r, "id"), 10, 32)
+	if err != nil {
+		http.Error(w, apperr.IdUint32ErrorMessage, http.StatusBadRequest)
+		return
+	}
+
+	localArticle, err := h.GetUseCase.GetArticle(uint32(id))
+	if err != nil || !localArticle.IsOnline {
+		http.Error(w, "The requested resource, identified by its unique ID, could not be found on the server.", http.StatusNotFound)
+		return
+	}
+
+	articleJson, _ := json.Marshal(localArticle)
+	_, _ = w.Write(articleJson)
+}
+
+func (h *Handler) PostArticle(w http.ResponseWriter, r *http.Request) {
+	var localArticle PostArticle
+	err := json.NewDecoder(r.Body).Decode(&localArticle)
+	if err != nil {
+		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
+		return
+	}
+
+	err = validator.Validate.Struct(localArticle)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	createdArticle, err := h.CreateUseCase.CreateArticle(useCases.CreateArticleCommand{
+		Title: localArticle.Title,
+		Body:  localArticle.Body,
+	})
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	articleJson, _ := json.Marshal(createdArticle)
+
+	_, _ = w.Write(articleJson)
+}
+
+func (h *Handler) ListArticles(w http.ResponseWriter, _ *http.Request) {
+	articles := h.ListUseCase.ListArticles()
+	onlineArticles := make([]domainArticle.Article, 0)
+	for _, localArticle := range articles {
+		if localArticle.IsOnline {
+			onlineArticles = append(onlineArticles, localArticle)
+		}
+	}
+	articlesJson, _ := json.Marshal(onlineArticles)
+	_, _ = w.Write(articlesJson)
+}
+
+func (h *Handler) DeleteArticle(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.ParseUint(chi.URLParam(r, "id"), 10, 32)
+	if err != nil {
+		http.Error(w, apperr.IdUint32ErrorMessage, http.StatusBadRequest)
+		return
+	}
+
+	err = h.DeleteUseCase.DeleteArticle(uint32(id))
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusNotFound)
+		return
+	}
+
+	_, _ = w.Write([]byte("article deleted"))
+}