From 2b20e23015b4b6a82ce6951179cd7308692f0134 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Rapha=C3=ABl=20Gertz?= <git@rapsys.eu>
Date: Wed, 14 Oct 2020 03:51:20 +0200
Subject: [PATCH] Add LocaleSubscriber to redirect used to logical language
 without session

---
 EventSubscriber/LocaleSubscriber.php | 60 ++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 EventSubscriber/LocaleSubscriber.php

diff --git a/EventSubscriber/LocaleSubscriber.php b/EventSubscriber/LocaleSubscriber.php
new file mode 100644
index 0000000..7941a80
--- /dev/null
+++ b/EventSubscriber/LocaleSubscriber.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace Rapsys\AirBundle\EventSubscriber;
+
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Event\RequestEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\Routing\RouterInterface;
+
+class LocaleSubscriber implements EventSubscriberInterface {
+	private $locales;
+	private $router;
+
+	public function __construct(RouterInterface $router, array $locales = ['en']) {
+		$this->locales = $locales;
+		$this->router = $router;
+	}
+
+	public function onKernelRequest(RequestEvent $event) {
+		//Retrieve request
+		$request = $event->getRequest();
+
+		//Check for session
+		//XXX: people blocking cookies will be stuck to preferred language version
+		if (!$request->hasPreviousSession()) {
+			//Get preferred language
+			//XXX: default language is unused, it will return locales[0] if everything fail
+			$preferred = $request->getPreferredLanguage($this->locales);
+
+			//Check if preferred language differs from current request locale
+			if ($preferred != $request->getLocale()) {
+				//Save preferred locale in session
+				$request->getSession()->set('_locale', $preferred);
+
+				//Generate current route with preferred language
+				//XXX: may trigger a Symfony\Component\Routing\Exception\RouteNotFoundException if route is not found for preferred locale
+				$uri = $this->router->generate(
+					//Current route
+					$request->get('_route'),
+					//Force preferred locale
+					['_locale' => $preferred]+$request->get('_route_params')
+				);
+
+				//Regenerate route with preferred locale
+				$event->setResponse(new RedirectResponse($uri, 302));
+
+				//End process
+				return;
+			}
+		}
+	}
+
+	public static function getSubscribedEvents() {
+		return [
+			// must be registered before the default locale listener
+			KernelEvents::REQUEST => [['onKernelRequest', 10]]
+		];
+	}
+}
-- 
2.41.1