From 2d70391e315fdacd7c907d1df81b23097b3861dc Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Sat, 6 Nov 2021 13:40:15 +0300
Subject: [PATCH] [#350] v2/session: Support `status` field in
 `ResponseMetaHeader`

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 v2/session/convert.go       | 17 +++++++++++++++++
 v2/session/grpc/types.go    |  8 ++++++++
 v2/session/marshal.go       | 11 ++++++++++-
 v2/session/test/generate.go |  2 ++
 v2/session/types.go         | 36 ++++++++++++++++++++++++++++++++++++
 5 files changed, 73 insertions(+), 1 deletion(-)

diff --git a/v2/session/convert.go b/v2/session/convert.go
index 42101d3..8015832 100644
--- a/v2/session/convert.go
+++ b/v2/session/convert.go
@@ -10,6 +10,8 @@ import (
 	"github.com/nspcc-dev/neofs-api-go/v2/refs"
 	refsGRPC "github.com/nspcc-dev/neofs-api-go/v2/refs/grpc"
 	session "github.com/nspcc-dev/neofs-api-go/v2/session/grpc"
+	"github.com/nspcc-dev/neofs-api-go/v2/status"
+	statusGRPC "github.com/nspcc-dev/neofs-api-go/v2/status/grpc"
 )
 
 func (c *CreateRequestBody) ToGRPCMessage() grpc.Message {
@@ -560,6 +562,7 @@ func (r *ResponseMetaHeader) ToGRPCMessage() grpc.Message {
 		m.SetEpoch(r.epoch)
 		m.SetTtl(r.ttl)
 		m.SetOrigin(r.origin.ToGRPCMessage().(*session.ResponseMetaHeader))
+		m.SetStatus(r.status.ToGRPCMessage().(*statusGRPC.Status))
 	}
 
 	return m
@@ -601,6 +604,20 @@ func (r *ResponseMetaHeader) FromGRPCMessage(m grpc.Message) error {
 		}
 	}
 
+	st := v.GetStatus()
+	if st == nil {
+		r.status = nil
+	} else {
+		if r.status == nil {
+			r.status = new(status.Status)
+		}
+
+		err = r.status.FromGRPCMessage(st)
+		if err != nil {
+			return err
+		}
+	}
+
 	r.xHeaders, err = XHeadersFromGRPC(v.GetXHeaders())
 	if err != nil {
 		return err
diff --git a/v2/session/grpc/types.go b/v2/session/grpc/types.go
index cee4638..07d5d13 100644
--- a/v2/session/grpc/types.go
+++ b/v2/session/grpc/types.go
@@ -3,6 +3,7 @@ package session
 import (
 	acl "github.com/nspcc-dev/neofs-api-go/v2/acl/grpc"
 	refs "github.com/nspcc-dev/neofs-api-go/v2/refs/grpc"
+	status "github.com/nspcc-dev/neofs-api-go/v2/status/grpc"
 )
 
 // SetKey sets key to the X-Header.
@@ -219,6 +220,13 @@ func (m *ResponseMetaHeader) SetOrigin(v *ResponseMetaHeader) {
 	}
 }
 
+// SetStatus sets response status.
+func (m *ResponseMetaHeader) SetStatus(v *status.Status) {
+	if m != nil {
+		m.Status = v
+	}
+}
+
 // SetBodySignature sets signature of the request body.
 func (m *RequestVerificationHeader) SetBodySignature(v *refs.Signature) {
 	if m != nil {
diff --git a/v2/session/marshal.go b/v2/session/marshal.go
index 05085d7..7ffe5e0 100644
--- a/v2/session/marshal.go
+++ b/v2/session/marshal.go
@@ -52,6 +52,7 @@ const (
 	respMetaHeaderTTLField      = 3
 	respMetaHeaderXHeadersField = 4
 	respMetaHeaderOriginField   = 5
+	respMetaHeaderStatusField   = 6
 
 	respVerifHeaderBodySignatureField   = 1
 	respVerifHeaderMetaSignatureField   = 2
@@ -712,7 +713,14 @@ func (r *ResponseMetaHeader) StableMarshal(buf []byte) ([]byte, error) {
 		offset += n
 	}
 
-	_, err = proto.NestedStructureMarshal(respMetaHeaderOriginField, buf[offset:], r.origin)
+	n, err = proto.NestedStructureMarshal(respMetaHeaderOriginField, buf[offset:], r.origin)
+	if err != nil {
+		return nil, err
+	}
+
+	offset += n
+
+	_, err = proto.NestedStructureMarshal(respMetaHeaderStatusField, buf[offset:], r.status)
 	if err != nil {
 		return nil, err
 	}
@@ -737,6 +745,7 @@ func (r *ResponseMetaHeader) StableSize() (size int) {
 	}
 
 	size += proto.NestedStructureSize(respMetaHeaderOriginField, r.origin)
+	size += proto.NestedStructureSize(respMetaHeaderStatusField, r.status)
 
 	return size
 }
diff --git a/v2/session/test/generate.go b/v2/session/test/generate.go
index 4aec4a4..8473d80 100644
--- a/v2/session/test/generate.go
+++ b/v2/session/test/generate.go
@@ -4,6 +4,7 @@ import (
 	acltest "github.com/nspcc-dev/neofs-api-go/v2/acl/test"
 	refstest "github.com/nspcc-dev/neofs-api-go/v2/refs/test"
 	"github.com/nspcc-dev/neofs-api-go/v2/session"
+	statustest "github.com/nspcc-dev/neofs-api-go/v2/status/test"
 )
 
 func GenerateCreateRequestBody(empty bool) *session.CreateRequestBody {
@@ -89,6 +90,7 @@ func generateResponseMetaHeader(empty, withOrigin bool) *session.ResponseMetaHea
 
 	m.SetXHeaders(GenerateXHeaders(empty))
 	m.SetVersion(refstest.GenerateVersion(empty))
+	m.SetStatus(statustest.Status(empty))
 
 	if withOrigin {
 		m.SetOrigin(generateResponseMetaHeader(empty, false))
diff --git a/v2/session/types.go b/v2/session/types.go
index 8d092a2..8a97817 100644
--- a/v2/session/types.go
+++ b/v2/session/types.go
@@ -3,6 +3,7 @@ package session
 import (
 	"github.com/nspcc-dev/neofs-api-go/v2/acl"
 	"github.com/nspcc-dev/neofs-api-go/v2/refs"
+	"github.com/nspcc-dev/neofs-api-go/v2/status"
 )
 
 type CreateRequestBody struct {
@@ -105,6 +106,8 @@ type ResponseMetaHeader struct {
 	xHeaders []*XHeader
 
 	origin *ResponseMetaHeader
+
+	status *status.Status
 }
 
 const (
@@ -608,6 +611,39 @@ func (r *ResponseMetaHeader) SetOrigin(v *ResponseMetaHeader) {
 	}
 }
 
+// GetStatus returns response status.
+func (r *ResponseMetaHeader) GetStatus() *status.Status {
+	if r != nil {
+		return r.status
+	}
+
+	return nil
+}
+
+// SetStatus sets response status.
+func (r *ResponseMetaHeader) SetStatus(v *status.Status) {
+	if r != nil {
+		r.status = v
+	}
+}
+
+// SetStatus sets status of the message which can carry ResponseMetaHeader.
+//
+// Sets status field on the "highest" level of meta headers.
+// If meta header is missing in message, it is allocated.
+func SetStatus(msg interface {
+	GetMetaHeader() *ResponseMetaHeader
+	SetMetaHeader(*ResponseMetaHeader)
+}, st *status.Status) {
+	meta := msg.GetMetaHeader()
+	if meta == nil {
+		meta = new(ResponseMetaHeader)
+		msg.SetMetaHeader(meta)
+	}
+
+	meta.SetStatus(st)
+}
+
 func (c *ObjectSessionContext) sessionTokenContext() {}
 
 func (c *ObjectSessionContext) GetVerb() ObjectSessionVerb {