change yaml package to support yaml tags

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

codec_test.go

@@ -28,7 +28,7 @@ func TestFrameFlatten(t *testing.T) {
 		Name: &codec.Frame{Data: []byte("test")},
 	}
 
-	buf, err := NewCodec().Marshal(s)
+	buf, err := NewCodec(codec.Flatten(true)).Marshal(s)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -37,14 +37,18 @@ func TestFrameFlatten(t *testing.T) {
 	}
 }
 
-func TestReadBody(t *testing.T) {
+func TestNativeYamlTags(t *testing.T) {
 	s := &struct {
-		Name string
-	}{}
-	c := NewCodec()
-	b := bytes.NewReader(nil)
-	err := c.ReadBody(b, s)
+		One string `yaml:"first"`
+	}{
+		One: "",
+	}
+
+	err := NewCodec().Unmarshal([]byte(`first: "val"`), s)
 	if err != nil {
 		t.Fatal(err)
 	}
+	if s.One != "val" {
+		t.Fatalf("XXX %#+v\n", s)
+	}
 }

go.mod

@@ -3,9 +3,8 @@ module go.unistack.org/micro-codec-yaml/v3
 go 1.16
 
 require (
-	github.com/kr/pretty v0.2.1 // indirect
-	github.com/kr/text v0.2.0 // indirect
-	go.unistack.org/micro/v3 v3.10.14
-	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
-	sigs.k8s.io/yaml v1.3.0
+	go.unistack.org/micro-proto/v3 v3.4.1
+	go.unistack.org/micro/v3 v3.10.94
+	google.golang.org/protobuf v1.34.2 // indirect
+	gopkg.in/yaml.v3 v3.0.1
 )

yaml.go

@@ -2,12 +2,10 @@
 package yaml // import "go.unistack.org/micro-codec-yaml/v3"
 
 import (
-	"io"
-
 	pb "go.unistack.org/micro-proto/v3/codec"
 	"go.unistack.org/micro/v3/codec"
 	rutil "go.unistack.org/micro/v3/util/reflect"
-	"sigs.k8s.io/yaml"
+	yaml "gopkg.in/yaml.v3"
 )
 
 type yamlCodec struct {
@@ -16,10 +14,6 @@ type yamlCodec struct {
 
 var _ codec.Codec = &yamlCodec{}
 
-const (
-	flattenTag = "flatten"
-)
-
 func (c *yamlCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error) {
 	if v == nil {
 		return nil, nil
@@ -29,9 +23,12 @@ func (c *yamlCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error)
 	for _, o := range opts {
 		o(&options)
 	}
-	if nv, nerr := rutil.StructFieldByTag(v, options.TagName, flattenTag); nerr == nil {
+
+	if options.Flatten {
+		if nv, nerr := rutil.StructFieldByTag(v, options.TagName, "flatten"); nerr == nil {
 			v = nv
 		}
+	}
 
 	switch m := v.(type) {
 	case *codec.Frame:
@@ -53,9 +50,11 @@ func (c *yamlCodec) Unmarshal(b []byte, v interface{}, opts ...codec.Option) err
 		o(&options)
 	}
 
-	if nv, nerr := rutil.StructFieldByTag(v, options.TagName, flattenTag); nerr == nil {
+	if options.Flatten {
+		if nv, nerr := rutil.StructFieldByTag(v, options.TagName, "flatten"); nerr == nil {
 			v = nv
 		}
+	}
 
 	switch m := v.(type) {
 	case *codec.Frame:
@@ -69,41 +68,6 @@ func (c *yamlCodec) Unmarshal(b []byte, v interface{}, opts ...codec.Option) err
 	return yaml.Unmarshal(b, v)
 }
 
-func (c *yamlCodec) ReadHeader(conn io.Reader, m *codec.Message, t codec.MessageType) error {
-	return nil
-}
-
-func (c *yamlCodec) ReadBody(conn io.Reader, v interface{}) error {
-	if v == nil {
-		return nil
-	}
-
-	buf, err := io.ReadAll(conn)
-	if err != nil {
-		return err
-	} else if len(buf) == 0 {
-		return nil
-	}
-
-	return c.Unmarshal(buf, v)
-}
-
-func (c *yamlCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
-	if v == nil {
-		return nil
-	}
-
-	buf, err := c.Marshal(v)
-	if err != nil {
-		return err
-	} else if len(buf) == 0 {
-		return codec.ErrInvalidMessage
-	}
-
-	_, err = conn.Write(buf)
-	return err
-}
-
 func (c *yamlCodec) String() string {
 	return "yaml"
 }