Add a reference provider for /call/ links

Signed-off-by: Joas Schilling <coding@schilljs.com>

2 files changed, 164 insertions, 0 deletions

diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index 3e44c14c7..965abbf85 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 
 namespace OCA\Talk\AppInfo;
 
+use OCA\Talk\Collaboration\Reference\TalkReferenceProvider;
 use OCP\Util;
 use OCA\Circles\Events\AddingCircleMemberEvent;
 use OCA\Circles\Events\CircleDestroyedEvent;
@@ -145,6 +146,8 @@ class Application extends App implements IBootstrap {
 
 		$context->registerProfileLinkAction(TalkAction::class);
 
+		$context->registerReferenceProvider(TalkReferenceProvider::class);
+
 		$context->registerTalkBackend(TalkBackend::class);
 	}
 
diff --git a/lib/Collaboration/Reference/TalkReferenceProvider.php b/lib/Collaboration/Reference/TalkReferenceProvider.php
new file mode 100644
index 000000000..acfa43e74
--- /dev/null
+++ b/lib/Collaboration/Reference/TalkReferenceProvider.php
@@ -0,0 +1,161 @@
+<?php
+
+declare(strict_types = 1);
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @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\Talk\Collaboration\Reference;
+
+use OCA\Talk\Exceptions\RoomNotFoundException;
+use OCA\Talk\Manager;
+use OCA\Talk\Room;
+use OCP\Collaboration\Reference\IReference;
+use OCP\Collaboration\Reference\IReferenceProvider;
+use OCP\Collaboration\Reference\Reference;
+use OCP\IURLGenerator;
+
+class TalkReferenceProvider implements IReferenceProvider {
+
+	protected IURLGenerator $urlGenerator;
+	protected Manager $manager;
+	protected ?string $userId;
+
+	public function __construct(IURLGenerator $urlGenerator,
+								Manager $manager,
+								?string $userId) {
+		$this->urlGenerator = $urlGenerator;
+		$this->manager = $manager;
+		$this->userId = $userId;
+	}
+
+
+	public function matchReference(string $referenceText): bool {
+		return $this->getTalkAppLinkToken($referenceText) !== null;
+	}
+
+	private function getTalkAppLinkToken(string $referenceText): ?string {
+		$indexPhpUrl = $this->urlGenerator->getAbsoluteURL('/index.php/call/');
+		if (str_starts_with($referenceText, $indexPhpUrl)) {
+			return substr($referenceText, strlen($indexPhpUrl)) ?: null;
+		}
+
+		$rewriteUrl = $this->urlGenerator->getAbsoluteURL('/call/');
+		if (str_starts_with($referenceText, $rewriteUrl)) {
+			return substr($referenceText, strlen($rewriteUrl)) ?: null;
+		}
+
+		return null;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function resolveReference(string $referenceText): ?IReference {
+		if ($this->matchReference($referenceText)) {
+			$reference = new Reference($referenceText);
+			try {
+				$this->fetchReference($reference);
+			} catch (RoomNotFoundException $e) {
+				$reference->setRichObject('call', null);
+				$reference->setAccessible(false);
+			}
+			return $reference;
+		}
+
+		return null;
+	}
+
+	/**
+	 * @throws RoomNotFoundException
+	 */
+	private function fetchReference(Reference $reference): void {
+		if ($this->userId === null) {
+			throw new RoomNotFoundException();
+		}
+
+		$token = $this->getTalkAppLinkToken($reference->getId());
+		if ($token === null) {
+			throw new RoomNotFoundException();
+		}
+
+		$room = $this->manager->getRoomByToken($token, $this->userId);
+
+		$reference->setTitle($room->getDisplayName($this->userId));
+		$reference->setDescription($room->getDescription());
+		$reference->setUrl($this->urlGenerator->linkToRouteAbsolute('spreed.Page.showCall', ['token' => $room->getToken()]));
+		$reference->setImageUrl($this->getRoomIconUrl($room, $this->userId));
+
+		$reference->setRichObject('call', [
+			'id' => $room->getToken(),
+			'name' => $reference->getTitle(),
+			'link' => $reference->getUrl(),
+			'call-type' => $this->getRoomType($room),
+		]);
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getCachePrefix(string $referenceId): string {
+		return $this->getTalkAppLinkToken($referenceId) ?? '';
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getCacheKey(string $referenceId): ?string {
+		return $this->userId ?? '';
+	}
+
+	protected function getRoomIconUrl(Room $room, string $userId): string {
+		if ($room->getType() === Room::TYPE_ONE_TO_ONE) {
+			$participants = json_decode($room->getName(), true);
+
+			foreach ($participants as $p) {
+				if ($p !== $userId) {
+					return $this->urlGenerator->linkToRouteAbsolute(
+						'core.avatar.getAvatar',
+						[
+							'userId' => $p,
+							'size' => 64,
+						]
+					);
+				}
+			}
+		}
+
+		return $this->urlGenerator->getAbsoluteURL($this->urlGenerator->imagePath('spreed', 'changelog.svg'));
+	}
+
+	protected function getRoomType(Room $room): string {
+		switch ($room->getType()) {
+			case Room::TYPE_ONE_TO_ONE:
+				return 'one2one';
+			case Room::TYPE_GROUP:
+				return 'group';
+			case Room::TYPE_PUBLIC:
+				return 'public';
+			default:
+				return 'unknown';
+		}
+	}
+}