[#1307] object: Implement Patch method

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

pkg/services/object/patch/service.go

@@ -9,14 +9,36 @@ import (
 
 // Service implements Put operation of Object service v2.
 type Service struct {
+	keyStorage *util.KeyStorage
+
+	getSvc *getsvc.Service
+
+	putSvc *putsvc.Service
 }
 
 // NewService constructs Service instance from provided options.
-func NewService(_ *util.KeyStorage, _ *getsvc.Service, _ *putsvc.Service) *Service {
-	return &Service{}
+func NewService(ks *util.KeyStorage, getSvc *getsvc.Service, putSvc *putsvc.Service) *Service {
+	return &Service{
+		keyStorage: ks,
+
+		getSvc: getSvc,
+
+		putSvc: putSvc,
+	}
 }
 
 // Put calls internal service and returns v2 object streamer.
-func (s *Service) Patch() (object.PatchObjectstream, error) {
-	return &Streamer{}, nil
+func (s *Service) Patch() (object.PatchObjectStream, error) {
+	nodeKey, err := s.keyStorage.GetKey(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Streamer{
+		getSvc: s.getSvc,
+
+		putSvc: s.putSvc,
+
+		localNodeKey: nodeKey,
+	}, nil
 }