Agfdhyk

Im trying to display a flashbag on every page under certain conditions (loged in user, etc...), but im not sure how to use the right event listener, i think maybe I need some routing event listener for that...

Anyway, I tried with kernel.controller but in several pages there are more than 1 controller rendering content so I get duplicate flashbags in those pages. Thats why I think I need to use routes instead of controllers.

This is my code so far, I avoided conditions for now only to testing if its working (so it shows in any page always):

services.yml:

AppbundleEventListenerChapterFlashbagListener:

  arguments: [ '@session','@doctrine.orm.entity_manager', '@security.token_storage', '@translator' ]

  tags:

    - { name: kernel.event_listener, event:  kernel.controller, method: preExecute }

ChapterFlashbagListener:

<?php

namespace AppBundleEventListener;

use SymfonyComponentHttpFoundationSessionSession;

use DoctrineORMEntityManager;

use SymfonyComponentSecurityCoreAuthenticationTokenStorageTokenStorageInterface;

use SymfonyComponentHttpKernelEventFilterControllerEvent;

use SymfonyComponentTranslationTranslatorInterface;



class ChapterFlashbagListener

{

  private $session;

  private $em;

  private $tokenStorage;

  protected $translator;



  public function __construct(Session $session, EntityManager $em, TokenStorageInterface $tokenStorage, TranslatorInterface $translator)

  {

    $this->session = $session;

    $this->em = $em;

    $this->tokenStorage = $tokenStorage;

    $this->translator = $translator;

  }

  /**

  * @param FilterControllerEvent $event

  */

  public function preExecute(FilterControllerEvent $event)

  {

    $request = $event->getRequest();

    $session = $request->getSession();

    $m = $this->translator->trans('message'); 

    $session->getFlashBag()->add('warning', $m);

  }

}

Additional info: The project is a backend with Sonata if that info helps

You need to check wether the request is the master request to avoid those dublicate messages.

This can be done as follows:

 use SymfonyComponentHttpKernelHttpKernelInterface;



 if ($event->getRequestType() !== HttpKernelInterface::MASTER_REQUEST) {

     return;

 }



 $this->session->getFlashBag()->add('warning', $warning);