add listener service and message module

internal/services/interface.go

@@ -0,0 +1,7 @@
+package services
+
+import "context"
+
+type IService interface {
+	Run(ctx context.Context) (error)
+}

internal/services/listener/listener.go

@@ -0,0 +1,36 @@
+package listener
+
+import (
+	"context"
+	"fmt"
+
+	"git.3crabs.ru/VLADIMIR/butler/internal/modules/messenger"
+	"git.3crabs.ru/VLADIMIR/butler/internal/services"
+)
+
+type listenerService struct {
+	messenger messenger.IMessenger
+}
+
+func NewListener(
+	messenger messenger.IMessenger,
+) services.IService {
+	return &listenerService{
+		messenger: messenger,
+	}
+}
+
+func (s *listenerService) Run(ctx context.Context) error {
+	for {
+		msg, err := s.messenger.GetMessage(ctx)
+		if err != nil {
+			if err == context.Canceled {
+				return nil
+			}
+			return err
+		}
+		if err := s.messenger.SendMessage(ctx, msg); err != nil {
+			fmt.Println(err)
+		}
+	}
+}