fix(files): Add new NoteReferenceProvider

lib/AppInfo/Application.php

@@ -9,6 +9,7 @@
 
 namespace OCA\Notes\AppInfo;
 
+use OCA\Notes\Reference\NoteReferenceProvider;
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
@@ -38,6 +39,7 @@ public function register(IRegistrationContext $context): void {
 			BeforeShareCreatedEvent::class,
 			BeforeShareCreatedListener::class
 		);
+		$context->registerReferenceProvider(NoteReferenceProvider::class);
 	}
 
 	public function boot(IBootContext $context): void {

lib/Reference/NoteReferenceProvider.php

@@ -0,0 +1,101 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Notes\Reference;
+
+use OCA\Notes\Service\NoteDoesNotExistException;
+use OCA\Notes\Service\NotesService;
+use OCP\Collaboration\Reference\ADiscoverableReferenceProvider;
+use OCP\Collaboration\Reference\IReference;
+use OCP\Collaboration\Reference\Reference;
+use OCP\IL10N;
+use OCP\IURLGenerator;
+use OCP\IUserSession;
+use OCP\L10N\IFactory;
+use Psr\Log\LoggerInterface;
+
+class NoteReferenceProvider extends ADiscoverableReferenceProvider {
+	private const RICH_OBJECT_TYPE = 'notes_note';
+	private ?string $userId;
+	private IL10N $l10n;
+	private LoggerInterface $logger;
+
+	public function __construct(
+		private IURLGenerator $urlGenerator,
+		private NotesService $notesService,
+		IUserSession $userSession,
+		IFactory $l10n,
+		LoggerInterface $logger,
+	) {
+		$this->userId = $userSession->getUser()?->getUID();
+		$this->l10n = $l10n->get('notes');
+		$this->logger = $logger;
+	}
+
+	public function matchReference(string $referenceText): bool {
+		return $this->getNoteLinkId($referenceText) !== null;
+	}
+
+	private function getNoteLinkId(string $referenceText): ?int {
+		$start = $this->urlGenerator->getAbsoluteURL('/apps/notes/note/');
+		$startIndex = $this->urlGenerator->getAbsoluteURL('/index.php/apps/notes/note/');
+
+		foreach ([$start, $startIndex] as $url) {
+			preg_match('/^' . preg_quote($url, '/') . '([0-9]+)$/', $referenceText, $matches);
+			if ($matches && count($matches) > 1) {
+				return (int)$matches[1];
+			}
+		}
+
+		return null;
+	}
+
+	public function resolveReference(string $referenceText): ?IReference {
+		$noteId = $this->getNoteLinkId($referenceText);
+		$reference = new Reference($referenceText);
+
+		if ($this->userId !== null && $noteId !== null) {
+			try {
+				$note = $this->notesService->get($this->userId, $noteId);
+			} catch (NoteDoesNotExistException) {
+				$this->logger->warning('Could not find a note with id: ' . $noteId);
+				return null;
+			}
+			$reference->setTitle($note->getTitle());
+			$reference->setDescription($note->getCategory());
+			$reference->setImageUrl($this->urlGenerator->linkToRouteAbsolute('core.Preview.getPreviewByFileId', ['x' => 600, 'y' => 300, 'fileId' => $note->getId()]));
+
+			return $reference;
+		}
+
+		return null;
+	}
+
+	public function getCachePrefix(string $referenceId): string {
+		return $referenceId;
+	}
+
+	public function getCacheKey(string $referenceId): string {
+		return $this->userId ?? '';
+	}
+
+	public function getId(): string {
+		return 'notes' ;
+	}
+
+	public function getTitle(): string {
+		return $this->l10n->t('Notes');
+	}
+
+	public function getOrder(): int {
+		return 10;
+	}
+
+	public function getIconUrl(): string {
+		return $this->urlGenerator->imagePath('notes', 'notes.svg');
+	}
+}

lib/Service/NotesService.php

@@ -73,6 +73,9 @@ public function countNotes(string $userId) : int {
 		}
 	}
 
+	/**
+	 * @throws NoteDoesNotExistException
+	 */
 	public function get(string $userId, int $id) : Note {
 		$customExtension = $this->getCustomExtension($userId);
 		$notesFolder = $this->getNotesFolder($userId);