From 0908fd5a727c15a18cc9d2543294705915159f60 Mon Sep 17 00:00:00 2001
From: Matthias Breddin <mb@lunetics.com>
Date: Fri, 26 Oct 2012 17:07:17 +0200
Subject: [PATCH] Using EventSubscriber instead of Event Listener, because the
 LocaleListener must be called before the Symfony LocaleListener, which sets
 the locale in the router.

---
 EventListener/LocaleListener.php       | 33 +++++++++++++++++++++-----
 EventListener/LocaleUpdateListener.php | 19 ++++++++++++++-
 Resources/config/services.xml          |  6 ++---
 3 files changed, 48 insertions(+), 10 deletions(-)

diff --git a/EventListener/LocaleListener.php b/EventListener/LocaleListener.php
index 0c5d418..3511b48 100644
--- a/EventListener/LocaleListener.php
+++ b/EventListener/LocaleListener.php
@@ -15,6 +15,7 @@
 use Symfony\Component\HttpKernel\Log\LoggerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 use Lunetics\LocaleBundle\LocaleGuesser\LocaleGuesserManager;
 use Lunetics\LocaleBundle\Event\FilterLocaleSwitchEvent;
@@ -26,7 +27,7 @@
  * @author Christophe Willemsen <willemsen.christophe@gmail.com>
  * @author Matthias Breddin <mb@lunetics.com>
  */
-class LocaleListener
+class LocaleListener implements EventSubscriberInterface
 {
     /**
      * @var string Default framework locale
@@ -77,6 +78,8 @@ public function onKernelRequest(GetResponseEvent $event)
         /** @var $request \Symfony\Component\HttpFoundation\Request */
         $request = $event->getRequest();
 
+        $request->setDefaultLocale($this->defaultLocale);
+
         if ($event->getRequestType() !== HttpKernelInterface::MASTER_REQUEST && !$request->isXmlHttpRequest()) {
             $this->logEvent('Request is not a "MASTER_REQUEST" : SKIPPING...');
 
@@ -93,15 +96,21 @@ public function onKernelRequest(GetResponseEvent $event)
                 $this->dispatcher->dispatch(LocaleBundleEvents::onLocaleChange, $localeSwitchEvent);
             }
 
-            $this->dispatcher->addListener(KernelEvents::RESPONSE, function(FilterResponseEvent $event) {
-                return $event->getResponse()->setVary('Accept-Language');
-            });
-
             return;
         }
-        $request->setDefaultLocale($this->defaultLocale);
     }
 
+    /**
+     * This Listener adds a vary header to all responses.
+     *
+     * @param FilterResponseEvent $event
+     *
+     * @return \Symfony\Component\HttpFoundation\Response
+     */
+    public function onLocaleDetectedSetVaryHeader(FilterResponseEvent $event)
+    {
+        return $event->getResponse()->setVary('Accept-Language');
+    }
     /**
      * DI Setter for the EventDispatcher
      *
@@ -124,4 +133,16 @@ private function logEvent($logMessage, $parameters = null)
             $this->logger->info(sprintf($logMessage, $parameters));
         }
     }
+
+    /**
+     * {@inheritDoc}
+     */
+    public static function getSubscribedEvents()
+    {
+        return array(
+            // must be registered after the Router to have access to the _locale and before the Symfony LocaleListener
+            KernelEvents::REQUEST => array(array('onKernelRequest', 24)),
+            KernelEvents::RESPONSE => array('onLocaleDetectedSetVaryHeader')
+        );
+    }
 }
diff --git a/EventListener/LocaleUpdateListener.php b/EventListener/LocaleUpdateListener.php
index 0fca6a4..69fa15a 100644
--- a/EventListener/LocaleUpdateListener.php
+++ b/EventListener/LocaleUpdateListener.php
@@ -15,17 +15,19 @@
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 use Lunetics\LocaleBundle\Cookie\LocaleCookie;
 use Lunetics\LocaleBundle\Event\FilterLocaleSwitchEvent;
 use Lunetics\LocaleBundle\Session\LocaleSession;
+use Lunetics\LocaleBundle\LocaleBundleEvents;
 
 /**
  * Locale Update Listener
  *
  * @author Matthias Breddin <mb@lunetics.com>
  */
-class LocaleUpdateListener
+class LocaleUpdateListener implements EventSubscriberInterface
 {
     /**
      * @var string
@@ -96,6 +98,8 @@ public function onLocaleChange(FilterLocaleSwitchEvent $event)
      * Update Cookie Section
      *
      * @param bool $update If cookie should be updated
+     *
+     * @return bool
      */
     public function updateCookie($update)
     {
@@ -132,6 +136,8 @@ public function updateCookieOnResponse(FilterResponseEvent $event)
 
     /**
      * Update Session section
+     *
+     * @return bool
      */
     public function updateSession()
     {
@@ -158,4 +164,15 @@ private function checkGuesser($guesser)
     {
         return in_array($guesser, $this->registeredGuessers);
     }
+
+    /**
+     * {@inheritDoc}
+     */
+    public static function getSubscribedEvents()
+    {
+        return array(
+            // must be registered after the Router to have access to the _locale and before the Symfony LocaleListener
+            LocaleBundleEvents::onLocaleChange => array('onLocaleChange')
+        );
+    }
 }
diff --git a/Resources/config/services.xml b/Resources/config/services.xml
index b8873d7..c905830 100644
--- a/Resources/config/services.xml
+++ b/Resources/config/services.xml
@@ -35,13 +35,13 @@
         </service>
 
         <service id="lunetics_locale.locale_listener" class="%lunetics_locale.request_listener.class%">
-            <argument>%locale%</argument>
+            <argument>%kernel.default_locale%</argument>
             <argument type="service" id="lunetics_locale.guesser_manager" />
             <argument type="service" id="logger" />
             <call method="setEventDispatcher">
                 <argument type="service" id="event_dispatcher"/>
             </call>
-            <tag name="kernel.event_listener" event="kernel.request" method="onKernelRequest"/>
+            <tag name="kernel.event_subscriber"/>
         </service>
 
         <service id="lunetics_locale.locale_update_listener" class="Lunetics\LocaleBundle\EventListener\LocaleUpdateListener" scope="request">
@@ -51,7 +51,7 @@
             <argument type="service" id="event_dispatcher" />
             <argument>%lunetics_locale.guessing_order%</argument>
             <argument type="service" id="logger" />
-            <tag name="kernel.event_listener" event="lunetics_locale.change" method="onLocaleChange" />
+            <tag name="kernel.event_subscriber" />
         </service>
     </services>
 </container>