1 files changed, 120 insertions, 0 deletions
diff --git a/lib/private/Teams/TeamManager.php b/lib/private/Teams/TeamManager.php
new file mode 100644
index 00000000000..13d6cc459a9
--- /dev/null
+++ b/lib/private/Teams/TeamManager.php
@@ -0,0 +1,120 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OC\Teams;
+
+use OC\AppFramework\Bootstrap\Coordinator;
+use OCA\Circles\CirclesManager;
+use OCA\Circles\Exceptions\CircleNotFoundException;
+use OCA\Circles\Model\Circle;
+use OCA\Circles\Model\Member;
+use OCP\IURLGenerator;
+use OCP\Server;
+use OCP\Teams\ITeamManager;
+use OCP\Teams\ITeamResourceProvider;
+use OCP\Teams\Team;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Container\NotFoundExceptionInterface;
+
+class TeamManager implements ITeamManager {
+
+	/** @var ?ITeamResourceProvider[] */
+	private ?array $providers = null;
+
+	public function __construct(
+		private Coordinator $bootContext,
+		private IURLGenerator $urlGenerator,
+		private ?CirclesManager $circlesManager,
+	) {
+	}
+
+	public function hasTeamSupport(): bool {
+		return $this->circlesManager !== null;
+	}
+
+	public function getProviders(): array {
+		if (!$this->hasTeamSupport()) {
+			return [];
+		}
+
+		if ($this->providers !== null) {
+			return $this->providers;
+		}
+
+		$this->providers = [];
+		foreach ($this->bootContext->getRegistrationContext()->getTeamResourceProviders() as $providerRegistration) {
+			try {
+				/** @var ITeamResourceProvider $provider */
+				$provider = Server::get($providerRegistration->getService());
+				$this->providers[$provider->getId()] = $provider;
+			} catch (NotFoundExceptionInterface|ContainerExceptionInterface $e) {
+			}
+		}
+		return $this->providers;
+	}
+
+	public function getProvider(string $providerId): ITeamResourceProvider {
+		$providers = $this->getProviders();
+		if (isset($providers[$providerId])) {
+			return $providers[$providerId];
+		}
+
+		throw new \RuntimeException('No provider found for id ' . $providerId);
+	}
+
+	public function getSharedWith(string $teamId, string $userId): array {
+		if (!$this->hasTeamSupport()) {
+			return [];
+		}
+
+		if ($this->getTeam($teamId, $userId) === null) {
+			return [];
+		}
+
+		$resources = [];
+
+		foreach ($this->getProviders() as $provider) {
+			array_push($resources, ...$provider->getSharedWith($teamId));
+		}
+
+		return array_values($resources);
+	}
+
+	public function getTeamsForResource(string $providerId, string $resourceId, string $userId): array {
+		if (!$this->hasTeamSupport()) {
+			return [];
+		}
+
+		$provider = $this->getProvider($providerId);
+		return array_values(array_filter(array_map(function ($teamId) use ($userId) {
+			$team = $this->getTeam($teamId, $userId);
+			if ($team === null) {
+				return null;
+			}
+
+			return new Team(
+				$teamId,
+				$team->getDisplayName(),
+				$this->urlGenerator->linkToRouteAbsolute('contacts.contacts.directcircle', ['singleId' => $teamId]),
+			);
+		}, $provider->getTeamsForResource($resourceId))));
+	}
+
+	private function getTeam(string $teamId, string $userId): ?Circle {
+		if (!$this->hasTeamSupport()) {
+			return null;
+		}
+
+		try {
+			$federatedUser = $this->circlesManager->getFederatedUser($userId, Member::TYPE_USER);
+			$this->circlesManager->startSession($federatedUser);
+			return $this->circlesManager->getCircle($teamId);
+		} catch (CircleNotFoundException) {
+			return null;
+		}
+	}
+}