feat: Make node events serializable

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

3 files changed, 66 insertions, 1 deletions

diff --git a/lib/public/EventDispatcher/JsonSerializer.php b/lib/public/EventDispatcher/JsonSerializer.php
new file mode 100644
index 00000000000..1eb75ed7527
--- /dev/null
+++ b/lib/public/EventDispatcher/JsonSerializer.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCP\EventDispatcher;
+
+use OCP\Files\FileInfo;
+use OCP\IUser;
+
+/**
+ * Contains helper static methods to serialize OCP classes into arrays to pass json_encode.
+ * Useful for events implementing \JsonSerializable.
+ *
+ * @since 30.0.0
+ */
+
+final class JsonSerializer {
+	/**
+	 * @since 30.0.0
+	 */
+	public static function serializeFileInfo(FileInfo $node): array {
+		return [
+			'id' => $node->getId(),
+			'path' => $node->getPath(),
+		];
+	}
+
+	/**
+	 * @since 30.0.0
+	 */
+	public static function serializeUser(IUser $user): array {
+		return [
+			'uid' => $user->getUID(),
+			'displayName' => $user->getDisplayName(),
+		];
+	}
+}
diff --git a/lib/public/Files/Events/Node/AbstractNodeEvent.php b/lib/public/Files/Events/Node/AbstractNodeEvent.php
index 1b290578ab9..cc27bdd8cfd 100644
--- a/lib/public/Files/Events/Node/AbstractNodeEvent.php
+++ b/lib/public/Files/Events/Node/AbstractNodeEvent.php
@@ -9,12 +9,13 @@ declare(strict_types=1);
 namespace OCP\Files\Events\Node;
 
 use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\JsonSerializer;
 use OCP\Files\Node;
 
 /**
  * @since 20.0.0
  */
-abstract class AbstractNodeEvent extends Event {
+abstract class AbstractNodeEvent extends Event implements \JsonSerializable {
 	/**
 	 * @since 20.0.0
 	 */
@@ -29,4 +30,14 @@ abstract class AbstractNodeEvent extends Event {
 	public function getNode(): Node {
 		return $this->node;
 	}
+
+	/**
+	 * @since 30.0.0
+	 */
+	public function jsonSerialize(): array {
+		return [
+			'class' => static::class,
+			'node' => JsonSerializer::serializeFileInfo($this->node),
+		];
+	}
 }
diff --git a/lib/public/Files/Events/Node/AbstractNodesEvent.php b/lib/public/Files/Events/Node/AbstractNodesEvent.php
index a5b058f18f5..b5fd1b75898 100644
--- a/lib/public/Files/Events/Node/AbstractNodesEvent.php
+++ b/lib/public/Files/Events/Node/AbstractNodesEvent.php
@@ -9,6 +9,7 @@ declare(strict_types=1);
 namespace OCP\Files\Events\Node;
 
 use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\JsonSerializer;
 use OCP\Files\Node;
 
 /**
@@ -37,4 +38,15 @@ abstract class AbstractNodesEvent extends Event {
 	public function getTarget(): Node {
 		return $this->target;
 	}
+
+	/**
+	 * @since 30.0.0
+	 */
+	public function jsonSerialize(): array {
+		return [
+			'class' => static::class,
+			'source' => JsonSerializer::serializeFileInfo($this->source),
+			'target' => JsonSerializer::serializeFileInfo($this->target),
+		];
+	}
 }