todo

type IDGenerator interface {
	// Generate generates a new ID.
	Generate() (string, error)
}

type InMemoryStore struct {
	// contains filtered or unexported fields
}

type Item struct {
	ID        string
	Title     string
	Completed bool
	Order     int
}

type ItemUpdate struct {
	Title     *string
	Completed *bool
	Order     *int
}

type NewItem struct {
	Title string
	Order int
}

type NotFoundError struct {
	ID string
}

type Service interface {
	// AddItem adds a new item to the list.
	AddItem(ctx context.Context, newItem NewItem) (item Item, err error)

	// ListItems returns a list of items.
	ListItems(ctx context.Context) (items []Item, err error)

	// DeleteItems deletes all items from the list.
	DeleteItems(ctx context.Context) error

	// GetItem returns the details of an item.
	GetItem(ctx context.Context, id string) (item Item, err error)

	// UpdateItem updates an existing item.
	UpdateItem(ctx context.Context, id string, itemUpdate ItemUpdate) (item Item, err error)

	// DeleteItem deletes an item from the list.
	DeleteItem(ctx context.Context, id string) error
}

type Store interface {
	// Store stores an item.
	Store(ctx context.Context, item Item) error

	// GetAll returns all items.
	GetAll(ctx context.Context) ([]Item, error)

	// DeleteItems deletes all items in the store.
	DeleteAll(ctx context.Context) error

	// GetOne returns a single item by its ID.
	GetOne(ctx context.Context, id string) (Item, error)

	// DeleteOne deletes a single item by its ID.
	DeleteOne(ctx context.Context, id string) error
}