1 files changed, 88 insertions, 0 deletions
diff --git a/core/Controller/OCMController.php b/core/Controller/OCMController.php
new file mode 100644
index 00000000000..2d3b99f431d
--- /dev/null
+++ b/core/Controller/OCMController.php
@@ -0,0 +1,88 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OC\Core\Controller;
+
+use Exception;
+use OCA\CloudFederationAPI\Capabilities;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\Attribute\FrontpageRoute;
+use OCP\AppFramework\Http\Attribute\NoCSRFRequired;
+use OCP\AppFramework\Http\Attribute\OpenAPI;
+use OCP\AppFramework\Http\Attribute\PublicPage;
+use OCP\AppFramework\Http\DataResponse;
+use OCP\Capabilities\ICapability;
+use OCP\IAppConfig;
+use OCP\IRequest;
+use OCP\Server;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Controller about the endpoint /ocm-provider/
+ *
+ * @since 28.0.0
+ */
+class OCMController extends Controller {
+	public function __construct(
+		IRequest $request,
+		private readonly IAppConfig $appConfig,
+		private LoggerInterface $logger,
+	) {
+		parent::__construct('core', $request);
+	}
+
+	/**
+	 * generate a OCMProvider with local data and send it as DataResponse.
+	 * This replaces the old PHP file ocm-provider/index.php
+	 *
+	 * @psalm-suppress MoreSpecificReturnType
+	 * @psalm-suppress LessSpecificReturnStatement
+	 * @return DataResponse<Http::STATUS_OK, array{enabled: bool, apiVersion: string, endPoint: string, resourceTypes: list<array{name: string, shareTypes: list<string>, protocols: array{webdav: string}}>}, array{X-NEXTCLOUD-OCM-PROVIDERS: true, Content-Type: 'application/json'}>|DataResponse<Http::STATUS_INTERNAL_SERVER_ERROR, array{message: string}, array{}>
+	 *
+	 * 200: OCM Provider details returned
+	 * 500: OCM not supported
+	 */
+	#[PublicPage]
+	#[NoCSRFRequired]
+	#[FrontpageRoute(verb: 'GET', url: '/ocm-provider/')]
+	#[OpenAPI(scope: OpenAPI::SCOPE_DEFAULT)]
+	public function discovery(): DataResponse {
+		try {
+			$cap = Server::get(
+				$this->appConfig->getValueString(
+					'core', 'ocm_providers',
+					Capabilities::class,
+					lazy: true
+				)
+			);
+
+			if (!($cap instanceof ICapability)) {
+				throw new Exception('loaded class does not implements OCP\Capabilities\ICapability');
+			}
+
+			return new DataResponse(
+				$cap->getCapabilities()['ocm'] ?? ['enabled' => false],
+				Http::STATUS_OK,
+				[
+					'X-NEXTCLOUD-OCM-PROVIDERS' => true,
+					'Content-Type' => 'application/json'
+				]
+			);
+		} catch (ContainerExceptionInterface|Exception $e) {
+			$this->logger->error('issue during OCM discovery request', ['exception' => $e]);
+
+			return new DataResponse(
+				['message' => '/ocm-provider/ not supported'],
+				Http::STATUS_INTERNAL_SERVER_ERROR
+			);
+		}
+	}
+}