refactor feed updating

src/storage/feed.go

@@ -64,36 +64,37 @@ func (s *Storage) DeleteFeed(feedId int64) bool {
 	return nrows == 1
 }
 
-func (s *Storage) RenameFeed(feedId int64, newTitle string) bool {
-	_, err := s.db.Exec(`update feeds set title = :title where id = :id`,
-		sql.Named("title", newTitle),
-		sql.Named("id", feedId),
-	)
-	return err == nil
+type UpdateFeedParams struct {
+	Title          *string
+	FeedLink       *string
+	FolderID       *int64
+	UpdateFolderID bool
+	Icon           *[]byte
+	UpdateIcon     bool
 }
 
-func (s *Storage) UpdateFeedFolder(feedId int64, newFolderId *int64) bool {
-	_, err := s.db.Exec(`update feeds set folder_id = :folder_id where id = :id`,
-		sql.Named("folder_id", newFolderId),
+func (s *Storage) UpdateFeed(feedId int64, params UpdateFeedParams) (bool, error) {
+	_, err := s.db.Exec(`
+		update feeds set
+			title = coalesce(:title, title),
+			feed_link = coalesce(:feed_link, feed_link),
+			folder_id = case when :update_folder_id then :folder_id else folder_id end,
+			icon = case when :update_icon then :icon else icon end
+		where id = :id
+	`,
 		sql.Named("id", feedId),
+		sql.Named("title", params.Title),
+		sql.Named("feed_link", params.FeedLink),
+		sql.Named("update_folder_id", params.UpdateFolderID),
+		sql.Named("folder_id", params.FolderID),
+		sql.Named("update_icon", params.UpdateIcon),
+		sql.Named("icon", params.Icon),
 	)
-	return err == nil
-}
-
-func (s *Storage) UpdateFeedLink(feedId int64, newLink string) bool {
-	_, err := s.db.Exec(`update feeds set feed_link = :feed_link where id = :id`,
-		sql.Named("feed_link", newLink),
-		sql.Named("id", feedId),
-	)
-	return err == nil
-}
-
-func (s *Storage) UpdateFeedIcon(feedId int64, icon *[]byte) bool {
-	_, err := s.db.Exec(`update feeds set icon = :icon where id = :id`,
-		sql.Named("icon", icon),
-		sql.Named("id", feedId),
-	)
-	return err == nil
+	if err != nil {
+		log.Print(err)
+		return false, err
+	}
+	return true, nil
 }
 
 func (s *Storage) ListFeeds() []Feed {

src/storage/feed_test.go

@@ -54,9 +54,14 @@ func TestUpdateFeed(t *testing.T) {
 	folder := db.CreateFolder("test")
 	icon := []byte("icon")
 
-	db.RenameFeed(feed1.Id, "newtitle")
-	db.UpdateFeedFolder(feed1.Id, &folder.Id)
-	db.UpdateFeedIcon(feed1.Id, &icon)
+	title := "newtitle"
+	db.UpdateFeed(feed1.Id, UpdateFeedParams{
+		Title:          &title,
+		FolderID:       &folder.Id,
+		UpdateFolderID: true,
+		Icon:           &icon,
+		UpdateIcon:     true,
+	})
 
 	feed2 := db.GetFeed(feed1.Id)
 	if feed2.Title != "newtitle" {