feat: image variants engine

internal/infrastructure/useCases/SetVariantEnabled.go

@@ -0,0 +1,40 @@
+package useCases
+
+import (
+	"RenewCMS/internal/domain/audit"
+	"RenewCMS/internal/domain/image"
+	"context"
+	"time"
+)
+
+type SetVariantEnabledUseCase struct {
+	variants image.VariantRepository
+	files    image.VariantFileRepository
+	now      func() time.Time
+	recorder audit.Recorder
+}
+
+func NewSetVariantEnabledUseCase(variants image.VariantRepository, files image.VariantFileRepository, now func() time.Time, recorder audit.Recorder) *SetVariantEnabledUseCase {
+	return &SetVariantEnabledUseCase{variants, files, now, recorder}
+}
+
+func (u *SetVariantEnabledUseCase) SetEnabled(ctx context.Context, name string, enabled bool) (VariantSummary, error) {
+	current, err := u.variants.Get(name)
+	if err != nil {
+		return VariantSummary{}, err
+	}
+	if current.Enabled == enabled {
+		return summaryOf(current, u.files)
+	}
+
+	next := current
+	next.Enabled = enabled
+	next.UpdatedAt = u.now()
+	updated, err := u.variants.Update(next)
+	if err != nil {
+		recordFailure(ctx, u.recorder, enabledEvent(next), err)
+		return VariantSummary{}, err
+	}
+	u.recorder.Record(ctx, enabledEvent(updated))
+	return summaryOf(updated, u.files)
+}