func addItem(item *models.Item) error { if item == nil { return errors.New(500, "item must be present") } itemsLock.Lock() defer itemsLock.Unlock() item.ID = newItemID() items[item.ID] = item return nil }
func updateItem(id int64, item *models.Item) error { if item == nil { return errors.New(500, "item must be present") } itemsLock.Lock() defer itemsLock.Unlock() _, exists := items[id] if !exists { return errors.NotFound("not found: item %d", id) } item.ID = id items[id] = item return nil }