symfony5 service - how to inject session and user without the ContainerInterface - php

Question

I have this deprecation message:
Since symfony/dependency-injection 5.1: The
"Symfony\Component\DependencyInjection\ContainerInterface" autowiring
alias is deprecated. Define it explicitly in your app if you want to
keep using it.
From threads such as this Symfony: Explicit define Container in Service I understand that the long-term solution is to stop using the ContainerInterface all together in my services.
My services.yaml looks like this:
parameters:
#locale: en
basepath: '%env(basepath)%'
services:
# default configuration for services in *this* file
_defaults:
autowire: true # Automatically injects dependencies in your services.
autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.
# makes classes in src/ available to be used as services
# this creates a service per class whose id is the fully-qualified class name
App\:
resource: '../src/'
exclude:
- '../src/DependencyInjection/'
- '../src/Entity/'
- '../src/Kernel.php'
# controllers are imported separately to make sure services can be injected
# as action arguments even if you don't extend any base controller class
App\Controller\:
resource: '../src/Controller/'
tags: ['controller.service_arguments']
# add more service definitions when explicit configuration is needed
# please note that last definitions always *replace* previous ones
globalHelper:
class: App\Service\globalHelper
public: false
The service in question (globalHelper) looks like this:
<?php
namespace App\Service;
use Symfony\Component\DependencyInjection\ContainerInterface as Container;
use Doctrine\ORM\EntityManagerInterface as EntityManager;
class globalHelper {
private $container;
private $em;
public function __construct(Container $container, EntityManager $em) {
$this->container = $container;
$this->em = $em;
}
I only user the container to fetch session variables like this
$this->container->get('session')->getFlashBag()->add($type, $message);
And to get the current user (security context) like this
$this->container->get('security.context')->getToken()->getUser();
Can I get these sub-components of the container separately instead? What component then would I inject to access these two parts (session and user) respectively?
--------------- Addition --------------
According to Alexis' suggestion below I modified the head of the file with
<?php
namespace App\Service;
//use Symfony\Component\DependencyInjection\ContainerInterface as Container;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\Security\Core\Security;
use Doctrine\ORM\EntityManagerInterface as EntityManager;
class globalHelper {
//private $container;
private $requestStack;
private $security;
private $em;
//public function __construct(Container $container, RequestStack $requestStack, Security $security, EntityManager $em) {
public function __construct(RequestStack $requestStack, Security $security, EntityManager $em) {
//$this->container = $container;
$this->requestStack = $requestStack;
$this->security = $security;
$this->em = $em;
}
then replaced
$this->container->get('session')->getFlashBag()->add($type, $message);
with
$this->requestStack->getSession()->getFlashBag()->add($type, $message);
and get this error:
Attempted to call an undefined method named "getSession" of class
"Symfony\Component\HttpFoundation\RequestStack".
if I instead to this:
$this->requestStack->get('session')->getFlashBag()->add($type, $message);
Attempted to call an undefined method named "get" of class
"Symfony\Component\HttpFoundation\RequestStack". Did you mean to call
e.g. "getCurrentRequest", "getMasterRequest" or "getParentRequest"?

Answer 1

First it’s not mandatory to declare your service help with
autoconfigure: true
Then you must inject
Symfony\Component\HttpFoundation\RequestStack
and make
$requestStack->getSession()
Here's the docs
https://symfony.com/doc/current/session.html
For user you inject
Symfony\Component\Security\Core\Security
and make
$security->getUser()
Here's the docs
https://symfony.com/doc/current/security.html#fetching-the-user-from-a-service
-- EDIT --
Prio symfony 5.3 session can directly be injected with
Symfony\Component\HttpFoundation\Session\SessionInterface
It's depreciated after. Here's the blog post :
https://symfony.com/blog/new-in-symfony-5-3-session-service-deprecation

Answer 2

Using symfony 6.2, you can also add this on your service.yml:
Symfony\Component\HttpFoundation\Session\SessionInterface:
factory: "#=service('request_stack').getCurrentRequest()?.getSession()"
It can return null value