10 files changed, 22 insertions, 14 deletions
diff --git a/lib/private/EventDispatcher/SymfonyAdapter.php b/lib/private/EventDispatcher/SymfonyAdapter.php
index f2f2fbf59fd..f8f80b6c5f8 100644
--- a/lib/private/EventDispatcher/SymfonyAdapter.php
+++ b/lib/private/EventDispatcher/SymfonyAdapter.php
@@ -25,9 +25,9 @@ declare(strict_types=1);
 
 namespace OC\EventDispatcher;
 
+use OCP\ILogger;
 use function is_callable;
 use OCP\EventDispatcher\Event;
-use Symfony\Component\EventDispatcher\Event as SymfonyEvent;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
@@ -35,9 +35,12 @@ class SymfonyAdapter implements EventDispatcherInterface {
 
 	/** @var EventDispatcher */
 	private $eventDispatcher;
+	/** @var ILogger */
+	private $logger;
 
-	public function __construct(EventDispatcher $eventDispatcher) {
+	public function __construct(EventDispatcher $eventDispatcher, ILogger $logger) {
 		$this->eventDispatcher = $eventDispatcher;
+		$this->logger = $logger;
 	}
 
 	/**
@@ -46,16 +49,21 @@ class SymfonyAdapter implements EventDispatcherInterface {
 	 * @param string $eventName The name of the event to dispatch. The name of
 	 *                              the event is the name of the method that is
 	 *                              invoked on listeners.
-	 * @param SymfonyEvent|null $event The event to pass to the event handlers/listeners
+	 * @param Event|null $event The event to pass to the event handlers/listeners
 	 *                              If not supplied, an empty Event instance is created
 	 *
-	 * @return SymfonyEvent
+	 * @return void
 	 */
-	public function dispatch($eventName, SymfonyEvent $event = null) {
+	public function dispatch($eventName, $event = null) {
+		// type hinting is not possible, due to usage of GenericEvent
 		if ($event instanceof Event) {
 			$this->eventDispatcher->dispatch($eventName, $event);
 		} else {
 			// Legacy event
+			$this->logger->info(
+				'Deprecated event type for {name}: {class}',
+				[ 'name' => $eventName, 'class' => is_object($event) ? get_class($event) : 'null' ]
+			);
 			$this->eventDispatcher->getSymfonyDispatcher()->dispatch($eventName, $event);
 		}
 	}
diff --git a/lib/private/Files/Cache/AbstractCacheEvent.php b/lib/private/Files/Cache/AbstractCacheEvent.php
index c8a41ce54d8..db1e7a1cf32 100644
--- a/lib/private/Files/Cache/AbstractCacheEvent.php
+++ b/lib/private/Files/Cache/AbstractCacheEvent.php
@@ -23,7 +23,7 @@ namespace OC\Files\Cache;
 
 use OCP\Files\Cache\ICacheEvent;
 use OCP\Files\Storage\IStorage;
-use Symfony\Component\EventDispatcher\Event;
+use OCP\EventDispatcher\Event;
 
 class AbstractCacheEvent extends Event implements ICacheEvent {
 	protected $storage;
diff --git a/lib/public/App/ManagerEvent.php b/lib/public/App/ManagerEvent.php
index f46318c2621..27dc3a44dea 100644
--- a/lib/public/App/ManagerEvent.php
+++ b/lib/public/App/ManagerEvent.php
@@ -23,7 +23,7 @@
 
 namespace OCP\App;
 
-use Symfony\Component\EventDispatcher\Event;
+use OCP\EventDispatcher\Event;
 
 /**
  * Class ManagerEvent
diff --git a/lib/public/Comments/CommentsEntityEvent.php b/lib/public/Comments/CommentsEntityEvent.php
index fe8585a213e..d3ffb710e2e 100644
--- a/lib/public/Comments/CommentsEntityEvent.php
+++ b/lib/public/Comments/CommentsEntityEvent.php
@@ -22,7 +22,7 @@
 
 namespace OCP\Comments;
 
-use Symfony\Component\EventDispatcher\Event;
+use OCP\EventDispatcher\Event;
 
 /**
  * Class CommentsEntityEvent
diff --git a/lib/public/Comments/CommentsEvent.php b/lib/public/Comments/CommentsEvent.php
index eba4cebb3bf..43b8366a22f 100644
--- a/lib/public/Comments/CommentsEvent.php
+++ b/lib/public/Comments/CommentsEvent.php
@@ -23,7 +23,7 @@
 
 namespace OCP\Comments;
 
-use Symfony\Component\EventDispatcher\Event;
+use OCP\EventDispatcher\Event;
 
 /**
  * Class CommentsEvent
diff --git a/lib/public/Console/ConsoleEvent.php b/lib/public/Console/ConsoleEvent.php
index 7b3201999a3..6645b20ac2e 100644
--- a/lib/public/Console/ConsoleEvent.php
+++ b/lib/public/Console/ConsoleEvent.php
@@ -22,7 +22,7 @@
 
 namespace OCP\Console;
 
-use Symfony\Component\EventDispatcher\Event;
+use OCP\EventDispatcher\Event;
 
 /**
  * Class ConsoleEvent
diff --git a/lib/public/SabrePluginEvent.php b/lib/public/SabrePluginEvent.php
index d75c84965f6..8f8d155ec10 100644
--- a/lib/public/SabrePluginEvent.php
+++ b/lib/public/SabrePluginEvent.php
@@ -26,7 +26,7 @@ namespace OCP;
 
 use OCP\AppFramework\Http;
 use Sabre\DAV\Server;
-use Symfony\Component\EventDispatcher\Event;
+use OCP\EventDispatcher\Event;
 
 /**
  * @since 8.2.0
diff --git a/lib/public/SystemTag/ManagerEvent.php b/lib/public/SystemTag/ManagerEvent.php
index 452c0d5da8f..41155a64ea2 100644
--- a/lib/public/SystemTag/ManagerEvent.php
+++ b/lib/public/SystemTag/ManagerEvent.php
@@ -24,7 +24,7 @@ declare(strict_types=1);
 
 namespace OCP\SystemTag;
 
-use Symfony\Component\EventDispatcher\Event;
+use OCP\EventDispatcher\Event;
 
 /**
  * Class ManagerEvent
diff --git a/lib/public/SystemTag/MapperEvent.php b/lib/public/SystemTag/MapperEvent.php
index d98caf1317b..4e2c84fecaf 100644
--- a/lib/public/SystemTag/MapperEvent.php
+++ b/lib/public/SystemTag/MapperEvent.php
@@ -23,7 +23,7 @@ declare(strict_types=1);
 
 namespace OCP\SystemTag;
 
-use Symfony\Component\EventDispatcher\Event;
+use OCP\EventDispatcher\Event;
 
 /**
  * Class MapperEvent
diff --git a/lib/public/SystemTag/SystemTagsEntityEvent.php b/lib/public/SystemTag/SystemTagsEntityEvent.php
index e439c16d9c6..cb4982ae282 100644
--- a/lib/public/SystemTag/SystemTagsEntityEvent.php
+++ b/lib/public/SystemTag/SystemTagsEntityEvent.php
@@ -23,7 +23,7 @@ declare(strict_types=1);
 
 namespace OCP\SystemTag;
 
-use Symfony\Component\EventDispatcher\Event;
+use OCP\EventDispatcher\Event;
 
 /**
  * Class SystemTagsEntityEvent