From 8580b49c8d65a78126444ef49df1bbb18a849a42 Mon Sep 17 00:00:00 2001
From: Airat Arifullin <a.arifullin@yadro.com>
Date: Wed, 24 Jul 2024 17:45:30 +0300
Subject: [PATCH] [#94] rpc: Introduce `ObjectService.Patch` method

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>
---
 object/marshal.go |  6 +++---
 rpc/object.go     | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/object/marshal.go b/object/marshal.go
index a0b82df..00bafc9 100644
--- a/object/marshal.go
+++ b/object/marshal.go
@@ -1336,7 +1336,7 @@ func (r *PatchRequestBodyPatch) StableMarshal(buf []byte) []byte {
 
 	var offset int
 	offset += proto.NestedStructureMarshal(patchRequestBodyPatchRangeField, buf[offset:], r.Range)
-	offset += proto.BytesMarshal(patchRequestBodyPatchChunkField, buf[offset:], r.Chunk)
+	proto.BytesMarshal(patchRequestBodyPatchChunkField, buf[offset:], r.Chunk)
 
 	return buf
 }
@@ -1372,7 +1372,7 @@ func (r *PatchRequestBody) StableMarshal(buf []byte) []byte {
 		offset += proto.NestedStructureMarshal(patchRequestBodyNewAttrsField, buf[offset:], &r.NewAttributes[i])
 	}
 	offset += proto.BoolMarshal(patchRequestBodyReplaceAttrField, buf[offset:], r.ReplaceAttributes)
-	offset += proto.NestedStructureMarshal(patchRequestBodyPatchField, buf[offset:], r.Patch)
+	proto.NestedStructureMarshal(patchRequestBodyPatchField, buf[offset:], r.Patch)
 
 	return buf
 }
@@ -1418,7 +1418,7 @@ func (r *PatchResponseBody) StableMarshal(buf []byte) []byte {
 	}
 
 	var offset int
-	offset += proto.NestedStructureMarshal(patchResponseBodyObjectIDField, buf[offset:], r.ObjectID)
+	proto.NestedStructureMarshal(patchResponseBodyObjectIDField, buf[offset:], r.ObjectID)
 
 	return buf
 }
diff --git a/rpc/object.go b/rpc/object.go
index 1eca922..6d7af31 100644
--- a/rpc/object.go
+++ b/rpc/object.go
@@ -18,6 +18,7 @@ const (
 	rpcObjectHead      = "Head"
 	rpcObjectDelete    = "Delete"
 	rpcObjectPutSingle = "PutSingle"
+	rpcObjectPatch     = "Patch"
 )
 
 // PutRequestWriter is an object.PutRequest
@@ -205,3 +206,38 @@ func PutSingleObject(
 
 	return resp, nil
 }
+
+// PatchRequestWriter is an object.PatchRequest
+// message streaming component.
+type PatchRequestWriter struct {
+	wc client.MessageWriterCloser
+
+	resp message.Message
+}
+
+// Write writes req to the stream.
+func (w *PatchRequestWriter) Write(req *object.PatchRequest) error {
+	return w.wc.WriteMessage(req)
+}
+
+// Close closes the stream.
+func (w *PatchRequestWriter) Close() error {
+	return w.wc.Close()
+}
+
+// Patch executes ObjectService.Patch RPC.
+func Patch(
+	cli *client.Client,
+	resp *object.PatchResponse,
+	opts ...client.CallOption,
+) (*PatchRequestWriter, error) {
+	wc, err := client.OpenClientStream(cli, common.CallMethodInfoClientStream(serviceObject, rpcObjectPatch), resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return &PatchRequestWriter{
+		wc:   wc,
+		resp: resp,
+	}, nil
+}