allow to publish message via broker on noop client

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

client/noop.go

@@ -2,18 +2,24 @@ package client
 
 import (
 	"context"
+	"sync/atomic"
 
+	raw "github.com/unistack-org/micro-codec-bytes"
+	"github.com/unistack-org/micro/v3/broker"
 	"github.com/unistack-org/micro/v3/codec"
+	"github.com/unistack-org/micro/v3/errors"
+	"github.com/unistack-org/micro/v3/metadata"
 )
 
 type noopClient struct {
+	once atomic.Value
 	opts Options
 }
 
 type noopMessage struct {
 	topic   string
 	payload interface{}
-	contentType string
+	opts    MessageOptions
 }
 
 type noopRequest struct {
@@ -110,7 +116,7 @@ func (n *noopMessage) Payload() interface{} {
 }
 
 func (n *noopMessage) ContentType() string {
-	return n.contentType
+	return n.opts.ContentType
 }
 
 func (n *noopClient) Init(opts ...Option) error {
@@ -137,14 +143,72 @@ func (n *noopClient) NewRequest(service, endpoint string, req interface{}, opts
 }
 
 func (n *noopClient) NewMessage(topic string, msg interface{}, opts ...MessageOption) Message {
-	return &noopMessage{}
+	options := MessageOptions{}
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return &noopMessage{topic: topic, payload: msg, opts: options}
 }
 
 func (n *noopClient) Stream(ctx context.Context, req Request, opts ...CallOption) (Stream, error) {
 	return &noopStream{}, nil
 }
 
-func (n *noopClient) Publish(ctx context.Context, msg Message, opts ...PublishOption) error {
+func (n *noopClient) Publish(ctx context.Context, p Message, opts ...PublishOption) error {
+	var options PublishOptions
+	var body []byte
+
+	// fail early on connect error
+	if !n.once.Load().(bool) {
+		if err := n.opts.Broker.Connect(); err != nil {
+			return errors.InternalServerError("go.micro.client", err.Error())
+		}
+		n.once.Store(true)
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	md, ok := metadata.FromContext(ctx)
+	if !ok {
+		md = make(map[string]string)
+	}
+	md["Content-Type"] = p.ContentType()
+	md["Micro-Topic"] = p.Topic()
+
+	// passed in raw data
+	if d, ok := p.Payload().(*raw.Frame); ok {
+		body = d.Data
+	} else {
+		/*
+			// use codec for payload
+			cf, err := n.opts.Codecs[p.ContentType()]
+			if err != nil {
+				return errors.InternalServerError("go.micro.client", err.Error())
+			}
+		*/
+		// set the body
+		b, err := n.opts.Broker.Options().Codec.Marshal(p.Payload())
+		if err != nil {
+			return errors.InternalServerError("go.micro.client", err.Error())
+		}
+		body = b
+	}
+
+	topic := p.Topic()
+
+	// get the exchange
+	if len(options.Exchange) > 0 {
+		topic = options.Exchange
+	}
+
+	return n.opts.Broker.Publish(topic, &broker.Message{
+		Header: md,
+		Body:   body,
+	}, broker.PublishContext(options.Context))
+
 	return nil
 }