Merge pull request #33494 from nextcloud/enh/references

Backend for reference metadata fetching

4 files changed, 154 insertions, 0 deletions

diff --git a/core/Controller/ReferenceApiController.php b/core/Controller/ReferenceApiController.php
new file mode 100644
index 00000000000..3ecd9917b23
--- /dev/null
+++ b/core/Controller/ReferenceApiController.php
@@ -0,0 +1,81 @@
+<?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\Core\Controller;
+
+use OCP\AppFramework\Http\DataResponse;
+use OCP\Collaboration\Reference\IReferenceManager;
+use OCP\IRequest;
+
+class ReferenceApiController extends \OCP\AppFramework\OCSController {
+	private IReferenceManager $referenceManager;
+
+	public function __construct(string $appName, IRequest $request, IReferenceManager $referenceManager) {
+		parent::__construct($appName, $request);
+		$this->referenceManager = $referenceManager;
+	}
+
+	/**
+	 * @NoAdminRequired
+	 */
+	public function extract(string $text, bool $resolve = false, int $limit = 1): DataResponse {
+		$references = $this->referenceManager->extractReferences($text);
+
+		$result = [];
+		$index = 0;
+		foreach ($references as $reference) {
+			if ($index++ >= $limit) {
+				break;
+			}
+
+			$result[$reference] = $resolve ? $this->referenceManager->resolveReference($reference) : null;
+		}
+
+		return new DataResponse([
+			'references' => $result
+		]);
+	}
+
+
+	/**
+	 * @NoAdminRequired
+	 *
+	 * @param string[] $references
+	 */
+	public function resolve(array $references, int $limit = 1): DataResponse {
+		$result = [];
+		$index = 0;
+		foreach ($references as $reference) {
+			if ($index++ >= $limit) {
+				break;
+			}
+
+			$result[$reference] = $this->referenceManager->resolveReference($reference);
+		}
+
+		return new DataResponse([
+			'references' => array_filter($result)
+		]);
+	}
+}
diff --git a/core/Controller/ReferenceController.php b/core/Controller/ReferenceController.php
new file mode 100644
index 00000000000..2f6ef152d01
--- /dev/null
+++ b/core/Controller/ReferenceController.php
@@ -0,0 +1,67 @@
+<?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\Core\Controller;
+
+use OCP\AppFramework\Http\Response;
+use OCP\Collaboration\Reference\IReferenceManager;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\DataDownloadResponse;
+use OCP\AppFramework\Http\DataResponse;
+use OCP\Files\AppData\IAppDataFactory;
+use OCP\Files\NotFoundException;
+use OCP\Files\NotPermittedException;
+use OCP\IRequest;
+
+class ReferenceController extends Controller {
+	private IReferenceManager $referenceManager;
+	private IAppDataFactory $appDataFactory;
+
+	public function __construct(string $appName, IRequest $request, IReferenceManager $referenceManager, IAppDataFactory $appDataFactory) {
+		parent::__construct($appName, $request);
+		$this->referenceManager = $referenceManager;
+		$this->appDataFactory = $appDataFactory;
+	}
+
+	/**
+	 * @PublicPage
+	 * @NoCSRFRequired
+	 */
+	public function preview(string $referenceId): Response {
+		$reference = $this->referenceManager->getReferenceByCacheKey($referenceId);
+		if ($reference === null) {
+			return new DataResponse('', Http::STATUS_NOT_FOUND);
+		}
+
+		try {
+			$appData = $this->appDataFactory->get('core');
+			$folder = $appData->getFolder('opengraph');
+			$file = $folder->getFile($referenceId);
+			return new DataDownloadResponse($file->getContent(), $referenceId, $reference->getImageContentType());
+		} catch (NotFoundException|NotPermittedException $e) {
+			return new DataResponse('', Http::STATUS_NOT_FOUND);
+		}
+	}
+}
diff --git a/core/routes.php b/core/routes.php
index bfc614935e1..b75cb0f6b3b 100644
--- a/core/routes.php
+++ b/core/routes.php
@@ -79,6 +79,7 @@ $application->registerRoutes($this, [
 		['name' => 'Preview#getPreviewByFileId', 'url' => '/core/preview', 'verb' => 'GET'],
 		['name' => 'Preview#getPreview', 'url' => '/core/preview.png', 'verb' => 'GET'],
 		['name' => 'RecommendedApps#index', 'url' => '/core/apps/recommended', 'verb' => 'GET'],
+		['name' => 'Reference#preview', 'url' => '/core/references/preview/{referenceId}', 'verb' => 'GET'],
 		['name' => 'Css#getCss', 'url' => '/css/{appName}/{fileName}', 'verb' => 'GET'],
 		['name' => 'Js#getJs', 'url' => '/js/{appName}/{fileName}', 'verb' => 'GET'],
 		['name' => 'contactsMenu#index', 'url' => '/contactsmenu/contacts', 'verb' => 'POST'],
@@ -120,6 +121,9 @@ $application->registerRoutes($this, [
 		['root' => '/collaboration', 'name' => 'CollaborationResources#getCollectionsByResource', 'url' => '/resources/{resourceType}/{resourceId}', 'verb' => 'GET'],
 		['root' => '/collaboration', 'name' => 'CollaborationResources#createCollectionOnResource', 'url' => '/resources/{baseResourceType}/{baseResourceId}', 'verb' => 'POST'],
 
+		['root' => '/references', 'name' => 'ReferenceApi#extract', 'url' => '/extract', 'verb' => 'POST'],
+		['root' => '/references', 'name' => 'ReferenceApi#resolve', 'url' => '/resolve', 'verb' => 'POST'],
+
 		['root' => '/profile', 'name' => 'ProfileApi#setVisibility', 'url' => '/{targetUserId}', 'verb' => 'PUT'],
 
 		// Unified search
diff --git a/core/src/OCP/comments.js b/core/src/OCP/comments.js
index ed7ac67a073..0b44dd7be81 100644
--- a/core/src/OCP/comments.js
+++ b/core/src/OCP/comments.js
@@ -31,6 +31,8 @@ import $ from 'jquery'
  *
  * The downside: anything not ascii is excluded. Not sure how common it is in areas using different
  * alphabets… the upside: fake domains with similar looking characters won't be formatted as links
+ *
+ * This is a copy of the backend regex in IURLGenerator, make sure to adjust both when changing
  */
 const urlRegex = /(\s|^)(https?:\/\/)?((?:[-A-Z0-9+_]+\.)+[-A-Z]+(?:\/[-A-Z0-9+&@#%?=~_|!:,.;()]*)*)(\s|$)/ig