feat: image variants per image

internal/infrastructure/useCases/ListImageVariants.go

@@ -0,0 +1,33 @@
+package useCases
+
+import "RenewCMS/internal/domain/image"
+
+type ListImageVariantsUseCase struct {
+	images   image.Repository
+	variants image.VariantRepository
+	files    image.VariantFileRepository
+	renderer image.VariantRenderer
+}
+
+func NewListImageVariantsUseCase(images image.Repository, variants image.VariantRepository, files image.VariantFileRepository, renderer image.VariantRenderer) *ListImageVariantsUseCase {
+	return &ListImageVariantsUseCase{images, variants, files, renderer}
+}
+
+func (u *ListImageVariantsUseCase) List(id uint32) (ImageVariantList, error) {
+	img, err := u.images.Get(id)
+	if err != nil {
+		return ImageVariantList{}, err
+	}
+	if isVectorSource(img) {
+		return ImageVariantList{Unsupported: unsupportedSVG, Items: []ImageVariantView{}}, nil
+	}
+	enabled, err := enabledVariants(u.variants)
+	if err != nil {
+		return ImageVariantList{}, err
+	}
+	rows, err := currentFiles(u.files, image.StoredName(img.Path))
+	if err != nil {
+		return ImageVariantList{}, err
+	}
+	return ImageVariantList{Items: viewsOf(enabled, img, rows, u.renderer.EncodableFormats())}, nil
+}