migrate therinaldos.com data

wedding-pics/lib/private/Collaboration/Reference/File/FileReferenceEventListener.php

@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.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\File;
+
+use OC\Files\Node\NonExistingFile;
+use OC\Files\Node\NonExistingFolder;
+use OCP\Collaboration\Reference\IReferenceManager;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Files\Events\Node\NodeDeletedEvent;
+use OCP\Share\Events\ShareCreatedEvent;
+use OCP\Share\Events\ShareDeletedEvent;
+
+/** @template-implements IEventListener<Event|NodeDeletedEvent|ShareDeletedEvent|ShareCreatedEvent> */
+class FileReferenceEventListener implements IEventListener {
+	public function __construct(
+		private IReferenceManager $manager,
+	) {
+	}
+
+	public static function register(IEventDispatcher $eventDispatcher): void {
+		$eventDispatcher->addServiceListener(NodeDeletedEvent::class, FileReferenceEventListener::class);
+		$eventDispatcher->addServiceListener(ShareDeletedEvent::class, FileReferenceEventListener::class);
+		$eventDispatcher->addServiceListener(ShareCreatedEvent::class, FileReferenceEventListener::class);
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function handle(Event $event): void {
+		if ($event instanceof NodeDeletedEvent) {
+			if ($event->getNode() instanceof NonExistingFolder || $event->getNode() instanceof NonExistingFile) {
+				return;
+			}
+
+			$this->manager->invalidateCache((string)$event->getNode()->getId());
+		}
+		if ($event instanceof ShareDeletedEvent) {
+			$this->manager->invalidateCache((string)$event->getShare()->getNodeId());
+		}
+		if ($event instanceof ShareCreatedEvent) {
+			$this->manager->invalidateCache((string)$event->getShare()->getNodeId());
+		}
+	}
+}

wedding-pics/lib/private/Collaboration/Reference/File/FileReferenceProvider.php

@@ -0,0 +1,181 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.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\File;
+
+use OC\User\NoUserException;
+use OCP\Collaboration\Reference\ADiscoverableReferenceProvider;
+use OCP\Collaboration\Reference\IReference;
+use OCP\Collaboration\Reference\Reference;
+use OCP\Files\IMimeTypeDetector;
+use OCP\Files\InvalidPathException;
+use OCP\Files\IRootFolder;
+use OCP\Files\Node;
+use OCP\Files\NotFoundException;
+use OCP\Files\NotPermittedException;
+use OCP\IL10N;
+use OCP\IPreview;
+use OCP\IURLGenerator;
+use OCP\IUserSession;
+use OCP\L10N\IFactory;
+
+class FileReferenceProvider extends ADiscoverableReferenceProvider {
+	private ?string $userId;
+	private IL10N $l10n;
+
+	public function __construct(
+		private IURLGenerator $urlGenerator,
+		private IRootFolder $rootFolder,
+		IUserSession $userSession,
+		private IMimeTypeDetector $mimeTypeDetector,
+		private IPreview $previewManager,
+		IFactory $l10n,
+	) {
+		$this->userId = $userSession->getUser()?->getUID();
+		$this->l10n = $l10n->get('files');
+	}
+
+	public function matchReference(string $referenceText): bool {
+		return $this->getFilesAppLinkId($referenceText) !== null;
+	}
+
+	private function getFilesAppLinkId(string $referenceText): ?int {
+		$start = $this->urlGenerator->getAbsoluteURL('/apps/files/');
+		$startIndex = $this->urlGenerator->getAbsoluteURL('/index.php/apps/files/');
+
+		$fileId = null;
+
+		if (mb_strpos($referenceText, $start) === 0) {
+			$parts = parse_url($referenceText);
+			parse_str($parts['query'] ?? '', $query);
+			$fileId = isset($query['fileid']) ? (int)$query['fileid'] : $fileId;
+			$fileId = isset($query['openfile']) ? (int)$query['openfile'] : $fileId;
+		}
+
+		if (mb_strpos($referenceText, $startIndex) === 0) {
+			$parts = parse_url($referenceText);
+			parse_str($parts['query'] ?? '', $query);
+			$fileId = isset($query['fileid']) ? (int)$query['fileid'] : $fileId;
+			$fileId = isset($query['openfile']) ? (int)$query['openfile'] : $fileId;
+		}
+
+		if (mb_strpos($referenceText, $this->urlGenerator->getAbsoluteURL('/index.php/f/')) === 0) {
+			$fileId = str_replace($this->urlGenerator->getAbsoluteURL('/index.php/f/'), '', $referenceText);
+		}
+
+		if (mb_strpos($referenceText, $this->urlGenerator->getAbsoluteURL('/f/')) === 0) {
+			$fileId = str_replace($this->urlGenerator->getAbsoluteURL('/f/'), '', $referenceText);
+		}
+
+		return $fileId !== null ? (int)$fileId : null;
+	}
+
+	public function resolveReference(string $referenceText): ?IReference {
+		if ($this->matchReference($referenceText)) {
+			$reference = new Reference($referenceText);
+			try {
+				$this->fetchReference($reference);
+			} catch (NotFoundException $e) {
+				$reference->setRichObject('file', null);
+				$reference->setAccessible(false);
+			}
+			return $reference;
+		}
+
+		return null;
+	}
+
+	/**
+	 * @throws NotFoundException
+	 */
+	private function fetchReference(Reference $reference): void {
+		if ($this->userId === null) {
+			throw new NotFoundException();
+		}
+
+		$fileId = $this->getFilesAppLinkId($reference->getId());
+		if ($fileId === null) {
+			throw new NotFoundException();
+		}
+
+		try {
+			$userFolder = $this->rootFolder->getUserFolder($this->userId);
+			$files = $userFolder->getById($fileId);
+
+			if (empty($files)) {
+				throw new NotFoundException();
+			}
+
+			/** @var Node $file */
+			$file = array_shift($files);
+
+			$reference->setTitle($file->getName());
+			$reference->setDescription($file->getMimetype());
+			$reference->setUrl($this->urlGenerator->getAbsoluteURL('/index.php/f/' . $fileId));
+			if ($this->previewManager->isMimeSupported($file->getMimeType())) {
+				$reference->setImageUrl($this->urlGenerator->linkToRouteAbsolute('core.Preview.getPreviewByFileId', ['x' => 1600, 'y' => 630, 'fileId' => $fileId]));
+			} else {
+				$fileTypeIconUrl = $this->mimeTypeDetector->mimeTypeIcon($file->getMimeType());
+				$reference->setImageUrl($fileTypeIconUrl);
+			}
+
+			$reference->setRichObject('file', [
+				'id' => $file->getId(),
+				'name' => $file->getName(),
+				'size' => $file->getSize(),
+				'path' => $userFolder->getRelativePath($file->getPath()),
+				'link' => $reference->getUrl(),
+				'mimetype' => $file->getMimetype(),
+				'mtime' => $file->getMTime(),
+				'preview-available' => $this->previewManager->isAvailable($file)
+			]);
+		} catch (InvalidPathException|NotFoundException|NotPermittedException|NoUserException $e) {
+			throw new NotFoundException();
+		}
+	}
+
+	public function getCachePrefix(string $referenceId): string {
+		return (string)$this->getFilesAppLinkId($referenceId);
+	}
+
+	public function getCacheKey(string $referenceId): ?string {
+		return $this->userId ?? '';
+	}
+
+	public function getId(): string {
+		return 'files';
+	}
+
+	public function getTitle(): string {
+		return $this->l10n->t('Files');
+	}
+
+	public function getOrder(): int {
+		return 0;
+	}
+
+	public function getIconUrl(): string {
+		return $this->urlGenerator->imagePath('files', 'folder.svg');
+	}
+}

wedding-pics/lib/private/Collaboration/Reference/LinkReferenceProvider.php

@@ -0,0 +1,183 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.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 Fusonic\OpenGraph\Consumer;
+use GuzzleHttp\Exception\GuzzleException;
+use GuzzleHttp\Psr7\LimitStream;
+use GuzzleHttp\Psr7\Utils;
+use OC\Security\RateLimiting\Exception\RateLimitExceededException;
+use OC\Security\RateLimiting\Limiter;
+use OC\SystemConfig;
+use OCP\Collaboration\Reference\IReference;
+use OCP\Collaboration\Reference\IReferenceProvider;
+use OCP\Collaboration\Reference\Reference;
+use OCP\Files\AppData\IAppDataFactory;
+use OCP\Files\NotFoundException;
+use OCP\Http\Client\IClientService;
+use OCP\IRequest;
+use OCP\IURLGenerator;
+use OCP\IUserSession;
+use Psr\Log\LoggerInterface;
+
+class LinkReferenceProvider implements IReferenceProvider {
+	public const MAX_PREVIEW_SIZE = 1024 * 1024;
+
+	public const ALLOWED_CONTENT_TYPES = [
+		'image/png',
+		'image/jpg',
+		'image/jpeg',
+		'image/gif',
+		'image/svg+xml',
+		'image/webp'
+	];
+
+	public function __construct(
+		private IClientService $clientService,
+		private LoggerInterface $logger,
+		private SystemConfig $systemConfig,
+		private IAppDataFactory $appDataFactory,
+		private IURLGenerator $urlGenerator,
+		private Limiter $limiter,
+		private IUserSession $userSession,
+		private IRequest $request,
+	) {
+	}
+
+	public function matchReference(string $referenceText): bool {
+		if ($this->systemConfig->getValue('reference_opengraph', true) !== true) {
+			return false;
+		}
+
+		return (bool)preg_match(IURLGenerator::URL_REGEX, $referenceText);
+	}
+
+	public function resolveReference(string $referenceText): ?IReference {
+		if ($this->matchReference($referenceText)) {
+			$reference = new Reference($referenceText);
+			$this->fetchReference($reference);
+			return $reference;
+		}
+
+		return null;
+	}
+
+	private function fetchReference(Reference $reference): void {
+		try {
+			$user = $this->userSession->getUser();
+			if ($user) {
+				$this->limiter->registerUserRequest('opengraph', 10, 120, $user);
+			} else {
+				$this->limiter->registerAnonRequest('opengraph', 10, 120, $this->request->getRemoteAddress());
+			}
+		} catch (RateLimitExceededException $e) {
+			return;
+		}
+
+		$client = $this->clientService->newClient();
+		try {
+			$headResponse = $client->head($reference->getId(), [ 'timeout' => 10 ]);
+		} catch (\Exception $e) {
+			$this->logger->debug('Failed to perform HEAD request to get target metadata', ['exception' => $e]);
+			return;
+		}
+		$linkContentLength = $headResponse->getHeader('Content-Length');
+		if (is_numeric($linkContentLength) && (int) $linkContentLength > 5 * 1024 * 1024) {
+			$this->logger->debug('Skip resolving links pointing to content length > 5 MB');
+			return;
+		}
+		$linkContentType = $headResponse->getHeader('Content-Type');
+		$expectedContentType = 'text/html';
+		$suffixedExpectedContentType = $expectedContentType . ';';
+		$startsWithSuffixed = str_starts_with($linkContentType, $suffixedExpectedContentType);
+		// check the header begins with the expected content type
+		if ($linkContentType !== $expectedContentType && !$startsWithSuffixed) {
+			$this->logger->debug('Skip resolving links pointing to content type that is not "text/html"');
+			return;
+		}
+		try {
+			$response = $client->get($reference->getId(), [ 'timeout' => 10 ]);
+		} catch (\Exception $e) {
+			$this->logger->debug('Failed to fetch link for obtaining open graph data', ['exception' => $e]);
+			return;
+		}
+
+		$responseBody = (string)$response->getBody();
+
+		// OpenGraph handling
+		$consumer = new Consumer();
+		$consumer->useFallbackMode = true;
+		$object = $consumer->loadHtml($responseBody);
+
+		$reference->setUrl($reference->getId());
+
+		if ($object->title) {
+			$reference->setTitle($object->title);
+		}
+
+		if ($object->description) {
+			$reference->setDescription($object->description);
+		}
+
+		if ($object->images) {
+			try {
+				$host = parse_url($object->images[0]->url, PHP_URL_HOST);
+				if ($host === false || $host === null) {
+					$this->logger->warning('Could not detect host of open graph image URI for ' . $reference->getId());
+				} else {
+					$appData = $this->appDataFactory->get('core');
+					try {
+						$folder = $appData->getFolder('opengraph');
+					} catch (NotFoundException $e) {
+						$folder = $appData->newFolder('opengraph');
+					}
+					$response = $client->get($object->images[0]->url, ['timeout' => 10]);
+					$contentType = $response->getHeader('Content-Type');
+					$contentLength = $response->getHeader('Content-Length');
+
+					if (in_array($contentType, self::ALLOWED_CONTENT_TYPES, true) && $contentLength < self::MAX_PREVIEW_SIZE) {
+						$stream = Utils::streamFor($response->getBody());
+						$bodyStream = new LimitStream($stream, self::MAX_PREVIEW_SIZE, 0);
+						$reference->setImageContentType($contentType);
+						$folder->newFile(md5($reference->getId()), $bodyStream->getContents());
+						$reference->setImageUrl($this->urlGenerator->linkToRouteAbsolute('core.Reference.preview', ['referenceId' => md5($reference->getId())]));
+					}
+				}
+			} catch (GuzzleException $e) {
+				$this->logger->info('Failed to fetch and store the open graph image for ' . $reference->getId(), ['exception' => $e]);
+			} catch (\Throwable $e) {
+				$this->logger->error('Failed to fetch and store the open graph image for ' . $reference->getId(), ['exception' => $e]);
+			}
+		}
+	}
+
+	public function getCachePrefix(string $referenceId): string {
+		return $referenceId;
+	}
+
+	public function getCacheKey(string $referenceId): ?string {
+		return null;
+	}
+}

wedding-pics/lib/private/Collaboration/Reference/ReferenceManager.php

@@ -0,0 +1,255 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.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 OC\AppFramework\Bootstrap\Coordinator;
+use OC\Collaboration\Reference\File\FileReferenceProvider;
+use OCP\Collaboration\Reference\IDiscoverableReferenceProvider;
+use OCP\Collaboration\Reference\IReference;
+use OCP\Collaboration\Reference\IReferenceManager;
+use OCP\Collaboration\Reference\IReferenceProvider;
+use OCP\Collaboration\Reference\Reference;
+use OCP\ICache;
+use OCP\ICacheFactory;
+use OCP\IConfig;
+use OCP\IURLGenerator;
+use OCP\IUserSession;
+use Psr\Container\ContainerInterface;
+use Psr\Log\LoggerInterface;
+use Throwable;
+
+class ReferenceManager implements IReferenceManager {
+	public const CACHE_TTL = 3600;
+
+	/** @var IReferenceProvider[]|null */
+	private ?array $providers = null;
+	private ICache $cache;
+
+	public function __construct(
+		private LinkReferenceProvider $linkReferenceProvider,
+		ICacheFactory $cacheFactory,
+		private Coordinator $coordinator,
+		private ContainerInterface $container,
+		private LoggerInterface $logger,
+		private IConfig $config,
+		private IUserSession $userSession,
+	) {
+		$this->cache = $cacheFactory->createDistributed('reference');
+	}
+
+	/**
+	 * Extract a list of URLs from a text
+	 *
+	 * @return string[]
+	 */
+	public function extractReferences(string $text): array {
+		preg_match_all(IURLGenerator::URL_REGEX, $text, $matches);
+		$references = $matches[0] ?? [];
+		return array_map(function ($reference) {
+			return trim($reference);
+		}, $references);
+	}
+
+	/**
+	 * Try to get a cached reference object from a reference string
+	 */
+	public function getReferenceFromCache(string $referenceId): ?IReference {
+		$matchedProvider = $this->getMatchedProvider($referenceId);
+
+		if ($matchedProvider === null) {
+			return null;
+		}
+
+		$cacheKey = $this->getFullCacheKey($matchedProvider, $referenceId);
+		return $this->getReferenceByCacheKey($cacheKey);
+	}
+
+	/**
+	 * Try to get a cached reference object from a full cache key
+	 */
+	public function getReferenceByCacheKey(string $cacheKey): ?IReference {
+		$cached = $this->cache->get($cacheKey);
+		if ($cached) {
+			return Reference::fromCache($cached);
+		}
+
+		return null;
+	}
+
+	/**
+	 * Get a reference object from a reference string with a matching provider
+	 * Use a cached reference if possible
+	 */
+	public function resolveReference(string $referenceId): ?IReference {
+		$matchedProvider = $this->getMatchedProvider($referenceId);
+
+		if ($matchedProvider === null) {
+			return null;
+		}
+
+		$cacheKey = $this->getFullCacheKey($matchedProvider, $referenceId);
+		$cached = $this->cache->get($cacheKey);
+		if ($cached) {
+			return Reference::fromCache($cached);
+		}
+
+		$reference = $matchedProvider->resolveReference($referenceId);
+		if ($reference) {
+			$this->cache->set($cacheKey, Reference::toCache($reference), self::CACHE_TTL);
+			return $reference;
+		}
+
+		return null;
+	}
+
+	/**
+	 * Try to match a reference string with all the registered providers
+	 * Fallback to the link reference provider (using OpenGraph)
+	 *
+	 * @return IReferenceProvider|null the first matching provider
+	 */
+	private function getMatchedProvider(string $referenceId): ?IReferenceProvider {
+		$matchedProvider = null;
+		foreach ($this->getProviders() as $provider) {
+			$matchedProvider = $provider->matchReference($referenceId) ? $provider : null;
+			if ($matchedProvider !== null) {
+				break;
+			}
+		}
+
+		if ($matchedProvider === null && $this->linkReferenceProvider->matchReference($referenceId)) {
+			$matchedProvider = $this->linkReferenceProvider;
+		}
+
+		return $matchedProvider;
+	}
+
+	/**
+	 * Get a hashed full cache key from a key and prefix given by a provider
+	 */
+	private function getFullCacheKey(IReferenceProvider $provider, string $referenceId): string {
+		$cacheKey = $provider->getCacheKey($referenceId);
+		return md5($provider->getCachePrefix($referenceId)) . (
+			$cacheKey !== null ? ('-' . md5($cacheKey)) : ''
+		);
+	}
+
+	/**
+	 * Remove a specific cache entry from its key+prefix
+	 */
+	public function invalidateCache(string $cachePrefix, ?string $cacheKey = null): void {
+		if ($cacheKey === null) {
+			$this->cache->clear(md5($cachePrefix));
+			return;
+		}
+
+		$this->cache->remove(md5($cachePrefix) . '-' . md5($cacheKey));
+	}
+
+	/**
+	 * @return IReferenceProvider[]
+	 */
+	public function getProviders(): array {
+		if ($this->providers === null) {
+			$context = $this->coordinator->getRegistrationContext();
+			if ($context === null) {
+				return [];
+			}
+
+			$this->providers = array_filter(array_map(function ($registration): ?IReferenceProvider {
+				try {
+					/** @var IReferenceProvider $provider */
+					$provider = $this->container->get($registration->getService());
+				} catch (Throwable $e) {
+					$this->logger->error('Could not load reference provider ' . $registration->getService() . ': ' . $e->getMessage(), [
+						'exception' => $e,
+					]);
+					return null;
+				}
+
+				return $provider;
+			}, $context->getReferenceProviders()));
+
+			$this->providers[] = $this->container->get(FileReferenceProvider::class);
+		}
+
+		return $this->providers;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getDiscoverableProviders(): array {
+		// preserve 0 based index to avoid returning an object in data responses
+		return array_values(
+			array_filter($this->getProviders(), static function (IReferenceProvider $provider) {
+				return $provider instanceof IDiscoverableReferenceProvider;
+			})
+		);
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function touchProvider(string $userId, string $providerId, ?int $timestamp = null): bool {
+		$providers = $this->getDiscoverableProviders();
+		$matchingProviders = array_filter($providers, static function (IDiscoverableReferenceProvider $provider) use ($providerId) {
+			return $provider->getId() === $providerId;
+		});
+		if (!empty($matchingProviders)) {
+			if ($timestamp === null) {
+				$timestamp = time();
+			}
+
+			$configKey = 'provider-last-use_' . $providerId;
+			$this->config->setUserValue($userId, 'references', $configKey, (string) $timestamp);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getUserProviderTimestamps(): array {
+		$user = $this->userSession->getUser();
+		if ($user === null) {
+			return [];
+		}
+		$userId = $user->getUID();
+		$keys = $this->config->getUserKeys($userId, 'references');
+		$prefix = 'provider-last-use_';
+		$keys = array_filter($keys, static function (string $key) use ($prefix) {
+			return str_starts_with($key, $prefix);
+		});
+		$timestamps = [];
+		foreach ($keys as $key) {
+			$providerId = substr($key, strlen($prefix));
+			$timestamp = (int) $this->config->getUserValue($userId, 'references', $key);
+			$timestamps[$providerId] = $timestamp;
+		}
+		return $timestamps;
+	}
+}

wedding-pics/lib/private/Collaboration/Reference/RenderReferenceEventListener.php

@@ -0,0 +1,64 @@
+<?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;
+
+/** @template-implements IEventListener<Event|RenderReferenceEvent> */
+class RenderReferenceEventListener implements IEventListener {
+	public function __construct(
+		private IReferenceManager $manager,
+		private IInitialStateService $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;
+		}
+
+		$providers = $this->manager->getDiscoverableProviders();
+		$jsonProviders = array_map(static function (IDiscoverableReferenceProvider $provider) {
+			return $provider->jsonSerialize();
+		}, $providers);
+		$this->initialStateService->provideInitialState('core', 'reference-provider-list', $jsonProviders);
+
+		$timestamps = $this->manager->getUserProviderTimestamps();
+		$this->initialStateService->provideInitialState('core', 'reference-provider-timestamps', $timestamps);
+	}
+}