Add LegacyEventDispatcherProxy for BC support (#1537)

* Add LegacyEventDispatcherProxy for BC support

* Update .gitignore

* add LegacyEventDispatcherProxy to resetter and other classes

* LegacyEventDispatcherProxy #issuecomment-505335075

Author: Jamal

src/Command/PopulateCommand.php

@@ -32,6 +32,7 @@
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Question\Question;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\EventDispatcher\LegacyEventDispatcherProxy;
 
 /**
  * Populate the search index.
@@ -80,6 +81,11 @@ public function __construct(
         parent::__construct();
 
         $this->dispatcher = $dispatcher;
+
+        if (class_exists(LegacyEventDispatcherProxy::class)) {
+            $this->dispatcher = LegacyEventDispatcherProxy::decorate($dispatcher);
+        }
+
         $this->indexManager = $indexManager;
         $this->pagerProviderRegistry = $pagerProviderRegistry;
         $this->pagerPersisterRegistry = $pagerPersisterRegistry;

src/Doctrine/RegisterListenersService.php

@@ -8,6 +8,7 @@
 use FOS\ElasticaBundle\Persister\Event\PersistEvent;
 use FOS\ElasticaBundle\Provider\PagerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\EventDispatcher\LegacyEventDispatcherProxy;
 
 class RegisterListenersService
 {
@@ -19,6 +20,10 @@ class RegisterListenersService
     public function __construct(EventDispatcherInterface $dispatcher)
     {
         $this->dispatcher = $dispatcher;
+
+        if (class_exists(LegacyEventDispatcherProxy::class)) {
+            $this->dispatcher = LegacyEventDispatcherProxy::decorate($dispatcher);
+        }
     }
 
     public function register(ObjectManager $manager, PagerInterface $pager, array $options)

src/Index/Resetter.php

@@ -18,6 +18,7 @@
 use FOS\ElasticaBundle\Event\IndexResetEvent;
 use FOS\ElasticaBundle\Event\TypeResetEvent;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\EventDispatcher\LegacyEventDispatcherProxy;
 
 /**
  * Deletes and recreates indexes.
@@ -67,6 +68,11 @@ public function __construct(
         $this->aliasProcessor = $aliasProcessor;
         $this->configManager = $configManager;
         $this->dispatcher = $eventDispatcher;
+
+        if (class_exists(LegacyEventDispatcherProxy::class)) {
+            $this->dispatcher = LegacyEventDispatcherProxy::decorate($eventDispatcher);
+        }
+
         $this->indexManager = $indexManager;
         $this->mappingBuilder = $mappingBuilder;
     }

src/Persister/InPlacePagerPersister.php

@@ -11,6 +11,7 @@
 use FOS\ElasticaBundle\Persister\Event\PrePersistEvent;
 use FOS\ElasticaBundle\Provider\PagerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\EventDispatcher\LegacyEventDispatcherProxy;
 
 final class InPlacePagerPersister implements PagerPersisterInterface
 {
@@ -34,6 +35,10 @@ public function __construct(PersisterRegistry $registry, EventDispatcherInterfac
     {
         $this->registry = $registry;
         $this->dispatcher = $dispatcher;
+
+        if (class_exists(LegacyEventDispatcherProxy::class)) {
+            $this->dispatcher = LegacyEventDispatcherProxy::decorate($dispatcher);
+        }
     }
 
     /**

src/Transformer/ModelToElasticaAutoTransformer.php

@@ -14,6 +14,7 @@
 use Elastica\Document;
 use FOS\ElasticaBundle\Event\TransformEvent;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\EventDispatcher\LegacyEventDispatcherProxy;
 use Symfony\Component\PropertyAccess\PropertyAccessorInterface;
 
 /**
@@ -55,6 +56,10 @@ public function __construct(array $options = [], EventDispatcherInterface $dispa
     {
         $this->options = array_merge($this->options, $options);
         $this->dispatcher = $dispatcher;
+
+        if (class_exists(LegacyEventDispatcherProxy::class)) {
+            $this->dispatcher = LegacyEventDispatcherProxy::decorate($dispatcher);
+        }
     }
 
     /**