usecases

type HashDecoder interface {
	Decode(string) (ImageDescription, error)
}

type ImageDescription struct {
	Path   string
	Width  int
	Height int
}

type ImageFetcher interface {
	Fetch(path string) (image.Image, error)
}

type ImageResizer interface {
	Resize(image image.Image, w, h int) (image.Image, error)
}

type Logger interface {
	Log(format string, args ...interface{})
}

type ThumbnailInteractor struct {
	ThumbnailRepository domain.ThumbnailRepository
	ImageResizer        ImageResizer
	ImageFetcher        ImageFetcher
	HashDecoder         HashDecoder
	Logger              Logger
}