feat(story-2.1): add feed model and add-feed-by-url API

internal/handler/feed.go

@@ -0,0 +1,148 @@
+package handler
+
+import (
+	"encoding/json"
+	"errors"
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/google/uuid"
+	"github.com/michael/flowreader/internal/service"
+)
+
+// FeedHandler handles feed-related HTTP requests.
+type FeedHandler struct {
+	feedService *service.FeedService
+	authService *service.AuthService
+}
+
+// NewFeedHandler creates a new feed handler.
+func NewFeedHandler(feedService *service.FeedService, authService *service.AuthService) *FeedHandler {
+	return &FeedHandler{
+		feedService: feedService,
+		authService: authService,
+	}
+}
+
+// getUserFromRequest extracts the authenticated user from the request.
+func (h *FeedHandler) getUserFromRequest(r *http.Request) (uuid.UUID, error) {
+	cookie, err := r.Cookie("session_id")
+	if err != nil {
+		return uuid.Nil, errors.New("not authenticated")
+	}
+
+	user, err := h.authService.GetUserByToken(cookie.Value)
+	if err != nil || user == nil {
+		return uuid.Nil, errors.New("invalid session")
+	}
+
+	return user.ID, nil
+}
+
+// List handles GET /api/v1/feeds
+func (h *FeedHandler) List(w http.ResponseWriter, r *http.Request) {
+	userID, err := h.getUserFromRequest(r)
+	if err != nil {
+		respondError(w, http.StatusUnauthorized, err.Error())
+		return
+	}
+
+	feeds, err := h.feedService.GetUserFeeds(userID)
+	if err != nil {
+		respondError(w, http.StatusInternalServerError, "Failed to get feeds")
+		return
+	}
+
+	respondJSON(w, http.StatusOK, feeds)
+}
+
+// Add handles POST /api/v1/feeds
+func (h *FeedHandler) Add(w http.ResponseWriter, r *http.Request) {
+	userID, err := h.getUserFromRequest(r)
+	if err != nil {
+		respondError(w, http.StatusUnauthorized, err.Error())
+		return
+	}
+
+	var req service.AddFeedRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		respondError(w, http.StatusBadRequest, "Invalid request body")
+		return
+	}
+	req.UserID = userID
+
+	resp, err := h.feedService.AddFeed(req)
+	if err != nil {
+		switch {
+		case errors.Is(err, service.ErrInvalidURL):
+			respondError(w, http.StatusBadRequest, "Invalid URL format")
+		case errors.Is(err, service.ErrFeedExists):
+			respondError(w, http.StatusConflict, "Feed already exists")
+		default:
+			respondError(w, http.StatusInternalServerError, "Failed to add feed")
+		}
+		return
+	}
+
+	respondJSON(w, http.StatusCreated, resp)
+}
+
+// Get handles GET /api/v1/feeds/{id}
+func (h *FeedHandler) Get(w http.ResponseWriter, r *http.Request) {
+	userID, err := h.getUserFromRequest(r)
+	if err != nil {
+		respondError(w, http.StatusUnauthorized, err.Error())
+		return
+	}
+
+	feedID, err := uuid.Parse(chi.URLParam(r, "id"))
+	if err != nil {
+		respondError(w, http.StatusBadRequest, "Invalid feed ID")
+		return
+	}
+
+	feed, err := h.feedService.GetFeed(feedID, userID)
+	if err != nil {
+		switch {
+		case errors.Is(err, service.ErrFeedNotFound):
+			respondError(w, http.StatusNotFound, "Feed not found")
+		case errors.Is(err, service.ErrUnauthorized):
+			respondError(w, http.StatusForbidden, "Access denied")
+		default:
+			respondError(w, http.StatusInternalServerError, "Failed to get feed")
+		}
+		return
+	}
+
+	respondJSON(w, http.StatusOK, feed)
+}
+
+// Delete handles DELETE /api/v1/feeds/{id}
+func (h *FeedHandler) Delete(w http.ResponseWriter, r *http.Request) {
+	userID, err := h.getUserFromRequest(r)
+	if err != nil {
+		respondError(w, http.StatusUnauthorized, err.Error())
+		return
+	}
+
+	feedID, err := uuid.Parse(chi.URLParam(r, "id"))
+	if err != nil {
+		respondError(w, http.StatusBadRequest, "Invalid feed ID")
+		return
+	}
+
+	err = h.feedService.DeleteFeed(feedID, userID)
+	if err != nil {
+		switch {
+		case errors.Is(err, service.ErrFeedNotFound):
+			respondError(w, http.StatusNotFound, "Feed not found")
+		case errors.Is(err, service.ErrUnauthorized):
+			respondError(w, http.StatusForbidden, "Access denied")
+		default:
+			respondError(w, http.StatusInternalServerError, "Failed to delete feed")
+		}
+		return
+	}
+
+	respondJSON(w, http.StatusOK, map[string]string{"message": "Feed deleted"})
+}