[#74] apemanager: Generate protobufs for apemanager service

* Generate protobufs.
* Make marshallers, unmarshallers, json-encoders etc.
* Create message encoding/decoding unit-tests.

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

apemanager/marshal.go

@@ -0,0 +1,288 @@
+package apemanager
+
+import (
+	"fmt"
+
+	apemanager "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/message"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/proto"
+)
+
+const (
+	chainTargetTargetTypeField = 1
+	chainTargetNameField       = 2
+
+	chainRawField = 1
+
+	addChainReqBodyTargetField = 1
+	addChainReqBodyChainField  = 2
+
+	addChainRespBodyChainIDField = 1
+
+	removeChainReqBodyTargetField = 1
+	removeChainReqBodyChainField  = 2
+
+	/*
+		Fields for RemoveResponseBody are missed since RemoveResponseBody is empty.
+	*/
+
+	listChainsReqBodyTargetField = 1
+
+	listChainsRespBodyChainsField = 1
+)
+
+func (t *ChainTarget) StableSize() (size int) {
+	if t == nil {
+		return 0
+	}
+
+	size += proto.EnumSize(chainTargetTargetTypeField, int32(t.targeType))
+	size += proto.StringSize(chainTargetNameField, t.name)
+
+	return size
+}
+
+func (t *ChainTarget) StableMarshal(buf []byte) []byte {
+	if t == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, t.StableSize())
+	}
+
+	var offset int
+
+	offset += proto.EnumMarshal(chainTargetTargetTypeField, buf[offset:], int32(t.targeType))
+	proto.StringMarshal(chainTargetNameField, buf[offset:], t.name)
+
+	return buf
+}
+
+func (t *ChainTarget) Unmarshal(data []byte) error {
+	return message.Unmarshal(t, data, new(apemanager.ChainTarget))
+}
+
+func (c *Chain) StableSize() (size int) {
+	if c == nil {
+		return 0
+	}
+
+	switch v := c.GetKind().(type) {
+	case *ChainRaw:
+		if v != nil {
+			size += proto.BytesSize(chainRawField, v.GetRaw())
+		}
+	default:
+		panic(fmt.Sprintf("unsupported chain kind: %T", v))
+	}
+
+	return size
+}
+
+func (c *Chain) StableMarshal(buf []byte) []byte {
+	if c == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, c.StableSize())
+	}
+
+	var offset int
+
+	switch v := c.GetKind().(type) {
+	case *ChainRaw:
+		if v != nil {
+			proto.BytesMarshal(chainRawField, buf[offset:], v.GetRaw())
+		}
+	default:
+		panic(fmt.Sprintf("unsupported chain kind: %T", v))
+	}
+
+	return buf
+}
+
+func (c *Chain) Unmarshal(data []byte) error {
+	return message.Unmarshal(c, data, new(apemanager.Chain))
+}
+
+func (rb *AddChainRequestBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	size += proto.NestedStructureSize(addChainReqBodyTargetField, rb.target)
+	size += proto.NestedStructureSize(addChainReqBodyChainField, rb.chain)
+
+	return size
+}
+
+func (rb *AddChainRequestBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+
+	offset += proto.NestedStructureMarshal(addChainReqBodyTargetField, buf[offset:], rb.target)
+	proto.NestedStructureMarshal(addChainReqBodyChainField, buf[offset:], rb.chain)
+
+	return buf
+}
+
+func (rb *AddChainRequestBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.AddChainRequest_Body))
+}
+
+func (rb *AddChainResponseBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	size += proto.BytesSize(addChainRespBodyChainIDField, rb.chainID)
+
+	return size
+}
+
+func (rb *AddChainResponseBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+
+	proto.BytesMarshal(addChainRespBodyChainIDField, buf[offset:], rb.chainID)
+
+	return buf
+}
+
+func (rb *AddChainResponseBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.AddChainResponse_Body))
+}
+
+func (rb *RemoveChainRequestBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	size += proto.NestedStructureSize(addChainReqBodyTargetField, rb.target)
+	size += proto.BytesSize(addChainReqBodyChainField, rb.chainID)
+
+	return size
+}
+
+func (rb *RemoveChainRequestBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+
+	offset += proto.NestedStructureMarshal(removeChainReqBodyTargetField, buf[offset:], rb.target)
+	proto.BytesMarshal(removeChainReqBodyChainField, buf[offset:], rb.chainID)
+
+	return buf
+}
+
+func (rb *RemoveChainRequestBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.RemoveChainRequest_Body))
+}
+
+func (rb *RemoveChainResponseBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	return size
+}
+
+func (rb *RemoveChainResponseBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	return buf
+}
+
+func (rb *RemoveChainResponseBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.RemoveChainResponse_Body))
+}
+
+func (rb *ListChainsRequestBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	size += proto.NestedStructureSize(listChainsReqBodyTargetField, rb.target)
+
+	return size
+}
+
+func (rb *ListChainsRequestBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+	proto.NestedStructureMarshal(addChainReqBodyTargetField, buf[offset:], rb.target)
+
+	return buf
+}
+
+func (rb *ListChainsRequestBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.ListChainsRequest_Body))
+}
+
+func (rb *ListChainsResponseBody) StableSize() (size int) {
+	if rb == nil {
+		return 0
+	}
+
+	for _, chain := range rb.GetChains() {
+		size += proto.NestedStructureSize(listChainsRespBodyChainsField, chain)
+	}
+
+	return size
+}
+
+func (rb *ListChainsResponseBody) StableMarshal(buf []byte) []byte {
+	if rb == nil {
+		return []byte{}
+	}
+
+	if buf == nil {
+		buf = make([]byte, rb.StableSize())
+	}
+
+	var offset int
+	for _, chain := range rb.GetChains() {
+		offset += proto.NestedStructureMarshal(listChainsRespBodyChainsField, buf[offset:], chain)
+	}
+
+	return buf
+}
+
+func (rb *ListChainsResponseBody) Unmarshal(data []byte) error {
+	return message.Unmarshal(rb, data, new(apemanager.ListChainsResponse_Body))
+}