update handler (#2)

* 🔧 Remove commented-out regex patterns and initialization in config.

* ✨ Add NATS message publisher with configuration 📩🚀

* ✨ Add new PlainTextMarshaler and refactor handler in nats package.

internal/nats/handler.go

@@ -0,0 +1,63 @@
+package nats
+
+import (
+	"caatsm/internal/config"
+	"caatsm/internal/domain"
+	"caatsm/internal/parsers"
+	"caatsm/internal/repository"
+	"caatsm/pkg/utils"
+	"fmt"
+	"sync"
+
+	"github.com/ThreeDotsLabs/watermill"
+	"github.com/ThreeDotsLabs/watermill/message"
+)
+
+type MessageHandler struct {
+	mu         sync.Mutex
+	config     *config.Config
+	hasuraRepo *repository.HasuraRepository
+}
+
+func New(config *config.Config) *MessageHandler {
+	return &MessageHandler{
+		config:     config,
+		hasuraRepo: repository.New(config.Hasura.Endpoint, config.Hasura.Secret),
+	}
+}
+
+func (handler *MessageHandler) HandleMessage(msg *message.Message) error {
+	handler.mu.Lock()
+	defer handler.mu.Unlock()
+	log := utils.GetSugaredLogger()
+	if msg.Payload == nil {
+		log.Error("empty message")
+		return fmt.Errorf("empty message")
+	}
+	payload := string(msg.Payload)
+	var parsed *domain.ParsedMessage
+	if parsed = parsers.Parse(payload); !parsed.Parsed {
+		log.Infof("not parsed: [%s] : {%s} \n", msg.UUID, msg.Payload)
+	} else {
+		log.Infof("parsed [%s]: %v\n", msg.UUID, parsed.ToString())
+	}
+	handler.SaveMessage(parsed, msg.UUID)
+	handler.Publish(parsed)
+	return nil
+}
+
+func (n *MessageHandler) SaveMessage(parsed *domain.ParsedMessage, uuid string) {
+	logger := watermill.NewStdLogger(false, false)
+	if parsed != nil {
+		parsed.Uuid = uuid
+		if err := n.hasuraRepo.CreateNew(parsed); err != nil {
+			logger.Error("error inserting message", err, map[string]interface{}{"message": parsed})
+		}
+	}
+}
+
+func (n *MessageHandler) Publish(parsed *domain.ParsedMessage) {
+	if err := Publish(n.config, parsed); err != nil {
+		utils.GetSugaredLogger().Error("error publishing message", err, map[string]interface{}{"message": parsed})
+	}
+}