From 78374caa4137817bee9bf71562984f8f456540d3 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Fri, 13 Nov 2020 15:34:13 +0300
Subject: [PATCH] [#168] object: Implement binary/JSON encoders/decoders on
 SplitHeader

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 v2/object/json.go         | 20 ++++++++++++++++++++
 v2/object/json_test.go    | 12 ++++++++++++
 v2/object/marshal.go      | 11 +++++++++++
 v2/object/marshal_test.go |  7 ++-----
 4 files changed, 45 insertions(+), 5 deletions(-)

diff --git a/v2/object/json.go b/v2/object/json.go
index 7a3c246..fe0a848 100644
--- a/v2/object/json.go
+++ b/v2/object/json.go
@@ -44,3 +44,23 @@ func (a *Attribute) UnmarshalJSON(data []byte) error {
 
 	return nil
 }
+
+func (h *SplitHeader) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		EmitUnpopulated: true,
+	}.Marshal(
+		SplitHeaderToGRPCMessage(h),
+	)
+}
+
+func (h *SplitHeader) UnmarshalJSON(data []byte) error {
+	msg := new(object.Header_Split)
+
+	if err := protojson.Unmarshal(data, msg); err != nil {
+		return err
+	}
+
+	*h = *SplitHeaderFromGRPCMessage(msg)
+
+	return nil
+}
diff --git a/v2/object/json_test.go b/v2/object/json_test.go
index aa82f63..0c63b1b 100644
--- a/v2/object/json_test.go
+++ b/v2/object/json_test.go
@@ -30,3 +30,15 @@ func TestAttributeJSON(t *testing.T) {
 
 	require.Equal(t, a, a2)
 }
+
+func TestSplitHeaderJSON(t *testing.T) {
+	h := generateSplit("sig")
+
+	data, err := h.MarshalJSON()
+	require.NoError(t, err)
+
+	h2 := new(object.SplitHeader)
+	require.NoError(t, h2.UnmarshalJSON(data))
+
+	require.Equal(t, h, h2)
+}
diff --git a/v2/object/marshal.go b/v2/object/marshal.go
index 657ddf1..8b15beb 100644
--- a/v2/object/marshal.go
+++ b/v2/object/marshal.go
@@ -295,6 +295,17 @@ func (h *SplitHeader) StableSize() (size int) {
 	return size
 }
 
+func (h *SplitHeader) Unmarshal(data []byte) error {
+	m := new(object.Header_Split)
+	if err := goproto.Unmarshal(data, m); err != nil {
+		return err
+	}
+
+	*h = *SplitHeaderFromGRPCMessage(m)
+
+	return nil
+}
+
 func (h *Header) StableMarshal(buf []byte) ([]byte, error) {
 	if h == nil {
 		return []byte{}, nil
diff --git a/v2/object/marshal_test.go b/v2/object/marshal_test.go
index f73766e..aac122a 100644
--- a/v2/object/marshal_test.go
+++ b/v2/object/marshal_test.go
@@ -46,16 +46,13 @@ func TestSplitHeader_StableMarshal(t *testing.T) {
 	hdr := generateHeader(123)
 	from.SetParentHeader(hdr)
 
-	transport := new(grpc.Header_Split)
-
 	t.Run("non empty", func(t *testing.T) {
 		wire, err := from.StableMarshal(nil)
 		require.NoError(t, err)
 
-		err = goproto.Unmarshal(wire, transport)
-		require.NoError(t, err)
+		to := new(object.SplitHeader)
+		require.NoError(t, to.Unmarshal(wire))
 
-		to := object.SplitHeaderFromGRPCMessage(transport)
 		require.Equal(t, from, to)
 	})
 }