[#58] services/object: Implement Delete service

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/services/object/delete/service.go

@@ -0,0 +1,126 @@
+package deletesvc
+
+import (
+	"context"
+
+	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
+	headsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/head"
+	putsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/put"
+	objutil "github.com/nspcc-dev/neofs-node/pkg/services/object/util"
+	"github.com/pkg/errors"
+)
+
+type Service struct {
+	*cfg
+}
+
+type Option func(*cfg)
+
+type cfg struct {
+	ownerID *owner.ID
+
+	keyStorage *objutil.KeyStorage
+
+	putSvc *putsvc.Service
+
+	headSvc *headsvc.Service
+}
+
+func defaultCfg() *cfg {
+	return new(cfg)
+}
+
+func NewService(opts ...Option) *Service {
+	c := defaultCfg()
+
+	for i := range opts {
+		opts[i](c)
+	}
+
+	return &Service{
+		cfg: c,
+	}
+}
+
+func (s *Service) Delete(ctx context.Context, prm *Prm) (*Response, error) {
+	ownerID := s.ownerID
+	if token := prm.common.SessionToken(); token != nil {
+		ownerID = token.OwnerID()
+	}
+
+	if ownerID == nil {
+		return nil, errors.Errorf("(%T) missing owner identifier", s)
+	}
+
+	tool := &deleteTool{
+		ctx:       ctx,
+		putSvc:    s.putSvc,
+		obj:       newTombstone(ownerID, prm.addr.GetContainerID()),
+		addr:      prm.addr,
+		commonPrm: prm.common,
+	}
+
+	if err := s.deleteAll(tool); err != nil {
+		return nil, errors.Wrapf(err, "(%T) could not delete all objcet relations", s)
+	}
+
+	return new(Response), nil
+}
+
+func (s *Service) deleteAll(tool *deleteTool) error {
+	headResult, err := s.headSvc.Head(tool.ctx, new(headsvc.Prm).
+		WithAddress(tool.addr).
+		WithCommonPrm(tool.commonPrm),
+	)
+	if err != nil {
+		return errors.Wrapf(err, "(%T) could not receive Head result", s)
+	}
+
+	hdr := headResult.Header()
+
+	if err := tool.delete(hdr.GetID()); err != nil {
+		return errors.Wrapf(err, "(%T) could not remove object", s)
+	}
+
+	prevID := hdr.GetPreviousID()
+
+	if rightChild := headResult.RightChild(); rightChild != nil {
+		if err := tool.delete(rightChild.GetID()); err != nil {
+			return errors.Wrapf(err, "(%T) could not remove right child", s)
+		}
+
+		prevID = rightChild.GetPreviousID()
+	}
+
+	if prevID != nil {
+		tool.addr.SetObjectID(prevID)
+
+		return s.deleteAll(tool)
+	}
+
+	return nil
+}
+
+func WithOwnerID(v *owner.ID) Option {
+	return func(c *cfg) {
+		c.ownerID = v
+	}
+}
+
+func WithKeyStorage(v *objutil.KeyStorage) Option {
+	return func(c *cfg) {
+		c.keyStorage = v
+	}
+}
+
+func WithPutService(v *putsvc.Service) Option {
+	return func(c *cfg) {
+		c.putSvc = v
+	}
+}
+
+func WitHeadService(v *headsvc.Service) Option {
+	return func(c *cfg) {
+		c.headSvc = v
+	}
+}