Add endpoint for checking if a blog is being followed

backend/web/api/api.go

@@ -40,7 +40,7 @@ func Handler(store *storage.Storage, syncService *service.SyncService) http.Hand
 
 	// Check if the account follows a specific blog: HandleBlogFollowing
 	// GET /blogs/{blogID}/following -> 204 / 404
-	// mux.Handle("GET /blogs/{blogID}/following", accountRequired(HandleBlogFollowing(store)))
+	mux.Handle("GET /blogs/{blogID}/following", accountRequired(HandleBlogFollowing(store)))
 
 	mux.Handle("GET /blogs/{blogID}/posts", accountRequired(HandlePostList(store)))
 	mux.Handle("GET /blogs/{blogID}/posts/{postID}", accountRequired(HandlePostRead(store)))

backend/web/api/follow.go

@@ -100,3 +100,44 @@ func HandleBlogUnfollow(store *storage.Storage) http.Handler {
 		w.WriteHeader(http.StatusNoContent)
 	})
 }
+
+func HandleBlogFollowing(store *storage.Storage) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		account, ok := util.ContextGetAccount(r)
+		if !ok {
+			util.UnauthorizedResponse(w, r)
+			return
+		}
+
+		blogID, err := uuid.Parse(r.PathValue("blogID"))
+		if err != nil {
+			util.NotFoundResponse(w, r)
+			return
+		}
+
+		blog, err := store.Blog().Read(blogID)
+		if err != nil {
+			switch {
+			case errors.Is(err, postgres.ErrNotFound):
+				util.NotFoundResponse(w, r)
+			default:
+				util.ServerErrorResponse(w, r, err)
+			}
+
+			return
+		}
+
+		count, err := store.AccountBlog().Count(account, blog)
+		if err != nil {
+			util.ServerErrorResponse(w, r, err)
+			return
+		}
+
+		if count == 0 {
+			util.NotFoundResponse(w, r)
+			return
+		}
+
+		w.WriteHeader(http.StatusNoContent)
+	})
+}

backend/web/api/follow_test.go

@@ -55,3 +55,34 @@ func TestHandleBlogUnfollow(t *testing.T) {
 	rr := w.Result()
 	test.AssertEqual(t, rr.StatusCode, http.StatusNoContent)
 }
+
+func TestHandleBlogFollowing(t *testing.T) {
+	t.Parallel()
+
+	store, closer := test.NewStorage(t)
+	defer closer()
+
+	h := api.HandleBlogFollowing(store)
+
+	account, _ := test.CreateAccount(t, store)
+	blog := test.CreateBlog(t, store)
+
+	url := fmt.Sprintf("/blogs/%s/following", blog.ID())
+	w := httptest.NewRecorder()
+	r := httptest.NewRequest("GET", url, nil)
+	r.SetPathValue("blogID", blog.ID().String())
+	h.ServeHTTP(w, util.ContextSetAccount(r, account))
+
+	rr := w.Result()
+	test.AssertEqual(t, rr.StatusCode, http.StatusNotFound)
+
+	test.CreateAccountBlog(t, store, account, blog)
+
+	w = httptest.NewRecorder()
+	r = httptest.NewRequest("GET", url, nil)
+	r.SetPathValue("blogID", blog.ID().String())
+	h.ServeHTTP(w, util.ContextSetAccount(r, account))
+
+	rr = w.Result()
+	test.AssertEqual(t, rr.StatusCode, http.StatusNoContent)
+}