init post-service

services/post-service/internal/kafka/producer/post.go

@@ -0,0 +1,60 @@
+package producer
+
+import (
+	"context"
+
+	"github.com/rs/zerolog/log"
+	"github.com/segmentio/kafka-go"
+	"google.golang.org/protobuf/proto"
+
+	"github.com/hexolan/panels/post-service/internal"
+	"github.com/hexolan/panels/post-service/internal/rpc/postv1"
+)
+
+type PostEventProducer struct {
+	writer *kafka.Writer
+}
+
+func NewPostEventProducer(cfg internal.Config) PostEventProducer {
+	writer := &kafka.Writer{
+		Addr: kafka.TCP(cfg.KafkaBrokers...),
+		Topic: "post",
+		Balancer: &kafka.LeastBytes{},
+	}
+
+	return PostEventProducer{writer: writer}
+}
+
+func (ep PostEventProducer) SendEvent(event *postv1.PostEvent) {
+	evtBytes, err := proto.Marshal(event)
+	if err != nil {
+		log.Panic().Err(err).Msg("failed to marshal event")
+	}
+
+	// Write to kafka
+	err = ep.writer.WriteMessages(context.Background(), kafka.Message{Value: evtBytes})
+	if err != nil {
+		log.Panic().Err(err).Msg("failed to dispatch event")
+	}
+}
+
+func (ep PostEventProducer) DispatchCreatedEvent(post *internal.Post) {
+	go ep.SendEvent(&postv1.PostEvent{
+		Type: "created",
+		Data: postv1.PostToProto(post),
+	})
+}
+
+func (ep PostEventProducer) DispatchUpdatedEvent(post *internal.Post) {
+	go ep.SendEvent(&postv1.PostEvent{
+		Type: "updated",
+		Data: postv1.PostToProto(post),
+	})
+}
+
+func (ep PostEventProducer) DispatchDeletedEvent(id internal.PostId) {
+	go ep.SendEvent(&postv1.PostEvent{
+		Type: "deleted",
+		Data: &postv1.Post{Id: id.GetReprId()},
+	})
+}