Add API to undelete delete group shares

When a group share is deleted we keep track of this in the DB.
Right now it is only possible for a recipient to get back the share by
asking the sharer to delete it and to share it again. This doesn't
scale.

This endpoint makes it possible to get back the share.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

1 files changed, 119 insertions, 0 deletions

diff --git a/apps/files_sharing/lib/Controller/DeletedShareAPIController.php b/apps/files_sharing/lib/Controller/DeletedShareAPIController.php
new file mode 100644
index 00000000000..9dadf8e25b4
--- /dev/null
+++ b/apps/files_sharing/lib/Controller/DeletedShareAPIController.php
@@ -0,0 +1,119 @@
+<?php
+declare(strict_types=1);
+/**
+ * @Copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ * @Copyright 2018, John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>
+ *
+ * @author John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @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\Files_Sharing\Controller;
+
+use OCP\AppFramework\Http\DataResponse;
+use OCP\AppFramework\OCS\OCSException;
+use OCP\AppFramework\OCS\OCSNotFoundException;
+use OCP\AppFramework\OCSController;
+use OCP\IRequest;
+use OCP\IUserManager;
+use OCP\Share\Exceptions\GenericShareException;
+use OCP\Share\Exceptions\ShareNotFound;
+use OCP\Share\IManager as ShareManager;
+use OCP\Share\IShare;
+
+class DeletedShareAPIController extends OCSController {
+
+	/** @var ShareManager */
+	private $shareManager;
+
+	/** @var string */
+	private $userId;
+
+	/** @var IUserManager */
+	private $userManager;
+
+	public function __construct(string $appName,
+								IRequest $request,
+								ShareManager $shareManager,
+								string $UserId,
+								IUserManager $userManager) {
+		parent::__construct($appName, $request);
+
+		$this->shareManager = $shareManager;
+		$this->userId = $UserId;
+		$this->userManager = $userManager;
+	}
+
+	private function formatShare(IShare $share): array {
+		return [
+			'id' => $share->getFullId(),
+			'uid_owner' => $share->getShareOwner(),
+			'displayname_owner' => $this->userManager->get($share->getShareOwner())->getDisplayName(),
+			'path' => $share->getTarget(),
+		];
+	}
+
+	/**
+	 * @NoAdminRequired
+	 */
+	public function index(): DataResponse {
+		$shares = $this->shareManager->getSharedWith($this->userId, \OCP\Share::SHARE_TYPE_GROUP, null, -1, 0);
+
+		// Only get deleted shares
+		$shares = array_filter($shares, function(IShare $share) {
+			return $share->getPermissions() === 0;
+		});
+
+		// Only get shares where the owner still exists
+		$shares = array_filter($shares, function (IShare $share) {
+			return $this->userManager->userExists($share->getShareOwner());
+		});
+
+		$shares = array_map(function (IShare $share) {
+			return $this->formatShare($share);
+		}, $shares);
+
+		return new DataResponse($shares);
+	}
+
+	/**
+	 * @NoAdminRequired
+	 *
+	 * @throws OCSException
+	 */
+	public function undelete(string $id): DataResponse {
+		try {
+			$share = $this->shareManager->getShareById($id, $this->userId);
+		} catch (ShareNotFound $e) {
+			throw new OCSNotFoundException('Share not found');
+		}
+
+		if ($share->getPermissions() !== 0) {
+			throw new OCSNotFoundException('No deleted share found');
+		}
+
+		try {
+			$this->shareManager->restoreShare($share, $this->userId);
+		} catch (GenericShareException $e) {
+			throw new OCSException('Something went wrong');
+		}
+
+		return new DataResponse([]);
+	}
+}