From f80bb987eb7f347f076b1a15cb1e523a40912578 Mon Sep 17 00:00:00 2001
From: Julien Veyssier <julien-nc@posteo.net>
Date: Tue, 6 Dec 2022 19:20:02 +0100
Subject: [PATCH] listen to RenderReferenceEvent to inject provider list with
 initial state

Signed-off-by: Julien Veyssier <julien-nc@posteo.net>
---
 lib/base.php                                  |  5 ++
 .../RenderReferenceEventListener.php          | 69 +++++++++++++++++++
 2 files changed, 74 insertions(+)
 create mode 100644 lib/private/Collaboration/Reference/RenderReferenceEventListener.php

diff --git a/lib/base.php b/lib/base.php
index a847373ea2bb2..09eccb1c647ae 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -752,6 +752,7 @@ public static function init(): void {
 		self::registerAccountHooks();
 		self::registerResourceCollectionHooks();
 		self::registerFileReferenceEventListener();
+		self::registerRenderReferenceEventListener();
 		self::registerAppRestrictionsHooks();
 
 		// Make sure that the application class is not loaded before the database is setup
@@ -915,6 +916,10 @@ private static function registerFileReferenceEventListener(): void {
 		\OC\Collaboration\Reference\File\FileReferenceEventListener::register(Server::get(IEventDispatcher::class));
 	}
 
+	private static function registerRenderReferenceEventListener() {
+		\OC\Collaboration\Reference\RenderReferenceEventListener::register(Server::get(IEventDispatcher::class));
+	}
+
 	/**
 	 * register hooks for sharing
 	 */
diff --git a/lib/private/Collaboration/Reference/RenderReferenceEventListener.php b/lib/private/Collaboration/Reference/RenderReferenceEventListener.php
new file mode 100644
index 0000000000000..b91b7ca917882
--- /dev/null
+++ b/lib/private/Collaboration/Reference/RenderReferenceEventListener.php
@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @author Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OC\Collaboration\Reference;
+
+use OCP\Collaboration\Reference\IDiscoverableReferenceProvider;
+use OCP\Collaboration\Reference\IReferenceManager;
+use OCP\Collaboration\Reference\RenderReferenceEvent;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\EventDispatcher\IEventListener;
+use OCP\IInitialStateService;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Container\NotFoundExceptionInterface;
+
+class RenderReferenceEventListener implements IEventListener {
+	private IReferenceManager $manager;
+	private IInitialStateService $initialStateService;
+
+	public function __construct(IReferenceManager $manager, IInitialStateService $initialStateService) {
+		$this->manager = $manager;
+		$this->initialStateService = $initialStateService;
+	}
+
+	public static function register(IEventDispatcher $eventDispatcher): void {
+		$eventDispatcher->addServiceListener(RenderReferenceEvent::class, RenderReferenceEventListener::class);
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function handle(Event $event): void {
+		if (!($event instanceof RenderReferenceEvent)) {
+			return;
+		}
+
+		try {
+			$providers = $this->manager->getDiscoverableProviders();
+		} catch (ContainerExceptionInterface | NotFoundExceptionInterface $e) {
+			return;
+		}
+
+		$jsonProviders = array_map(static function (IDiscoverableReferenceProvider $provider) {
+			return $provider->jsonSerialize();
+		}, $providers);
+		$this->initialStateService->provideInitialState('core', 'reference-provider-list', $jsonProviders);
+	}
+}