Make wellknow work with new infra

Signed-off-by: Carl Schwan <carl@carlschwan.eu>

1 files changed, 99 insertions, 0 deletions

diff --git a/lib/WellKnown/WebfingerHandler.php b/lib/WellKnown/WebfingerHandler.php
new file mode 100644
index 00000000..7e7e7cb3
--- /dev/null
+++ b/lib/WellKnown/WebfingerHandler.php
@@ -0,0 +1,99 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * @copyright 2018 Maxence Lange <maxence@artificial-owl.com>
+ * @copyright 2022 Carl Schwan <carl@carlschwan.eu>
+ *
+ * @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 OCA\Social\WellKnown;
+
+use OCA\Social\Db\CacheActorsRequest;
+use OCA\Social\Exceptions\CacheActorDoesNotExistException;
+use OCA\Social\Service\CacheActorService;
+use OCA\Social\Service\ConfigService;
+use OCA\Social\Service\FediverseService;
+use OCP\Http\WellKnown\IHandler;
+use OCP\Http\WellKnown\IRequestContext;
+use OCP\Http\WellKnown\IResponse;
+use OCP\Http\WellKnown\JrdResponse;
+use OCP\IURLGenerator;
+
+class WebfingerHandler implements IHandler {
+	private IURLGenerator $urlGenerator;
+	private CacheActorsRequest $cacheActorsRequest;
+	private CacheActorService $cacheActorService;
+	private FediverseService $fediverseService;
+	private ConfigService $configService;
+
+	public function __construct(
+		IURLGenerator $urlGenerator, CacheActorsRequest $cacheActorsRequest,
+		CacheActorService $cacheActorService, FediverseService $fediverseService,
+		ConfigService $configService
+	) {
+
+		$this->urlGenerator = $urlGenerator;
+		$this->cacheActorsRequest = $cacheActorsRequest;
+		$this->cacheActorService = $cacheActorService;
+		$this->fediverseService = $fediverseService;
+		$this->configService = $configService;
+	}
+
+	public function handle(string $service, IRequestContext $context, ?IResponse $previousResponse): ?IResponse {
+		// See https://docs.joinmastodon.org/spec/webfinger/
+
+		$this->fediverseService->jailed();
+		$subject = $context->getHttpRequest()->getParam('resource');
+
+		if (strpos($subject, 'acct:') === 0) {
+			$subject = substr($subject, 5);
+		}
+
+		try {
+			$actor = $this->cacheActorService->getFromLocalAccount($subject);
+		} catch (CacheActorDoesNotExistException $e) {
+			$actor = $this->cacheActorsRequest->getFromId($subject);
+			if (!$actor->isLocal()) {
+				throw new CacheActorDoesNotExistException();
+			}
+		}
+
+		$response = new JrdResponse($subject);
+
+		// ActivityPub profile
+		$href = $this->configService->getSocialUrl() . '@' . $actor->getPreferredUsername();
+		$href = rtrim($href, '/');
+		$response->addAlias($href);
+		$response->addLink('self', 'application/activity+json', $href);
+
+		// Nextcloud profile page
+		$profilePageUrl =  $this->urlGenerator->linkToRouteAbsolute('core.ProfilePage.index', [
+			'targetUserId' => $actor->getPreferredUsername()
+		]);
+		$response->addAlias($profilePageUrl);
+		$response->addLink('http://webfinger.net/rel/profile-page', 'text/html', $profilePageUrl);
+
+		// Ostatus subscribe url
+		// JrdResponse doesn't support template
+		// $subscribe = $this->urlGenerator->linkToRouteAbsolute('social.OStatus.subscribe') . '?uri={uri}';
+		// $response->addLink('http://ostatus.org/schema/1.0/subscribe', $subscribe);
+
+		return $response;
+	}
+}