feat: image variants engine

internal/infrastructure/useCases/DeleteVariant.go

@@ -0,0 +1,41 @@
+package useCases
+
+import (
+	"RenewCMS/internal/domain/audit"
+	"RenewCMS/internal/domain/image"
+	"context"
+)
+
+type DeleteVariantUseCase struct {
+	variants image.VariantRepository
+	cache    variantCache
+	recorder audit.Recorder
+}
+
+func NewDeleteVariantUseCase(variants image.VariantRepository, files image.VariantFileRepository, storage image.Storage, recorder audit.Recorder) *DeleteVariantUseCase {
+	return &DeleteVariantUseCase{variants, variantCache{files, storage}, recorder}
+}
+
+func (u *DeleteVariantUseCase) Delete(ctx context.Context, name string) error {
+	if _, err := u.variants.Get(name); err != nil {
+		return err
+	}
+
+	event := audit.NewEvent(audit.ActionVariantDelete, audit.CategoryMedia)
+	event.Target = audit.VariantTarget(name)
+	purged, err := u.cache.purgeVariant(name)
+	if err == nil {
+		err = u.variants.Delete(name)
+	}
+	if err != nil {
+		recordFailure(ctx, u.recorder, event, err)
+		return err
+	}
+	event.Params = variantPurgeParams(purged)
+	u.recorder.Record(ctx, event)
+	return nil
+}
+
+func variantPurgeParams(purged VariantPurgeResult) map[string]any {
+	return map[string]any{audit.ParamPurgedFiles: purged.Files, audit.ParamPurgedBytes: purged.Bytes}
+}