add email rotation regarding a limit

cmd/fake-smtp/container.go

@@ -43,6 +43,11 @@ func getServiceContainer(conf *config.Config) (*service.Container, error) {
 		cqrs.CommandHandlerFunc(command.HandleStoreEmail),
 	)
 
+	bus.RegisterCommand(
+		cqrs.MatchCommandRequest(&command.RotateEmailRequest{}),
+		cqrs.CommandHandlerFunc(command.HandleRotateEmail),
+	)
+
 	bus.RegisterCommand(
 		cqrs.MatchCommandRequest(&command.ClearInboxRequest{}),
 		cqrs.CommandHandlerFunc(command.HandleClearInbox),

cmd/fake-smtp/smtp.go

@@ -92,6 +92,18 @@ func (s *Session) Data(r io.Reader) error {
 		}
 	}
 
+	if conf.Data.MaxEmail > 0 {
+		cmd := &command.RotateEmailRequest{
+			MaxEmail: conf.Data.MaxEmail,
+		}
+
+		if _, err := bus.Exec(s.ctx, cmd); err != nil {
+			logger.Error(s.ctx, "could not exec command", logger.E(err))
+
+			return errors.Wrapf(err, "could not exec '%T' command", cmd)
+		}
+	}
+
 	cmd := &command.StoreEmailRequest{
 		Envelope: env,
 	}