feat: image variants per image

internal/infrastructure/useCases/PurgeImageVariant.go

@@ -0,0 +1,52 @@
+package useCases
+
+import (
+	"RenewCMS/internal/domain/audit"
+	"RenewCMS/internal/domain/image"
+	"context"
+)
+
+type PurgeImageVariantUseCase struct {
+	images   image.Repository
+	variants image.VariantRepository
+	files    image.VariantFileRepository
+	cache    variantCache
+	recorder audit.Recorder
+}
+
+func NewPurgeImageVariantUseCase(images image.Repository, variants image.VariantRepository, files image.VariantFileRepository, storage image.Storage, recorder audit.Recorder) *PurgeImageVariantUseCase {
+	return &PurgeImageVariantUseCase{images, variants, files, variantCache{files, storage}, recorder}
+}
+
+func (u *PurgeImageVariantUseCase) Purge(ctx context.Context, id uint32, name string) (VariantPurgeResult, error) {
+	img, err := u.images.Get(id)
+	if err != nil {
+		return VariantPurgeResult{}, err
+	}
+	variant, err := u.variants.Get(name)
+	if err != nil {
+		return VariantPurgeResult{}, err
+	}
+	if variant.Name != name {
+		return VariantPurgeResult{}, image.ErrVariantNotFound
+	}
+
+	event := audit.NewEvent(audit.ActionVariantPurgeImage, audit.CategoryMedia)
+	event.Target = imageTarget(img)
+	row, found, err := u.files.Find(name, image.StoredName(img.Path))
+	if err != nil {
+		recordFailure(ctx, u.recorder, event, err)
+		return VariantPurgeResult{}, err
+	}
+	if !found {
+		return VariantPurgeResult{}, nil
+	}
+	purged, err := u.cache.purge([]image.VariantFile{row})
+	if err != nil {
+		recordFailure(ctx, u.recorder, event, err)
+		return VariantPurgeResult{}, err
+	}
+	event.Params = variantPurgeParams(purged)
+	u.recorder.Record(ctx, event)
+	return purged, nil
+}