owncloud/core

<?php
/**
 * @author Björn Schießle <bjoern@schiessle.org>
 * @author Lukas Reschke <lukas@statuscode.ch>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Robin Appelman <icewind@owncloud.com>
 * @author Roeland Jago Douma <rullzer@owncloud.com>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OCA\Files_Sharing\Controllers;

use GuzzleHttp\Exception\ConnectException;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http\DataResponse;
use OCP\AppFramework\Http\JSONResponse;
use OCP\Http\Client\IClientService;
use OCP\IConfig;
use OCP\IRequest;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\EventDispatcher\GenericEvent;

/**
 * Class ExternalSharesController
 *
 * @package OCA\Files_Sharing\Controllers
 */
class ExternalSharesController extends Controller {
    /** @var \OCA\Files_Sharing\External\Manager */
    private $externalManager;
    /** @var IClientService */
    private $clientService;
    /**
     * @var \Symfony\Component\EventDispatcher\EventDispatcherInterface
     */
    private $dispatcher;

    /** @var IConfig $config */
    private $config;

    public const group_share_type = "group";
    /**
     * ExternalSharesController constructor.
     *
     * @param string $appName
     * @param IRequest $request
     * @param \OCA\Files_Sharing\External\Manager $externalManager
     * @param IClientService $clientService
     * @param EventDispatcherInterface $eventDispatcher
     * @param IConfig $config
     */
    public function __construct(
        $appName,
        IRequest $request,
        \OCA\Files_Sharing\External\Manager $externalManager,
        IClientService $clientService,
        EventDispatcherInterface $eventDispatcher,
        IConfig $config
    ) {
        parent::__construct($appName, $request);
        $this->externalManager = $externalManager;
        $this->clientService = $clientService;
        $this->dispatcher = $eventDispatcher;
        $this->config = $config;
    }

    /**
     * @NoAdminRequired
     * @NoOutgoingFederatedSharingRequired
     *
     * @return JSONResponse
     */
    public function index() {
        $federatedGroupResult = [];
        $groupExternalManager = $this->initGroupExternalManager();
        if ($groupExternalManager !== null) {
            $federatedGroupResult = $groupExternalManager->getOpenShares();
        }
        $result = array_merge($federatedGroupResult, $this->externalManager->getOpenShares());
        return new JSONResponse($result);
    }

    /**
     * @NoAdminRequired
     * @NoOutgoingFederatedSharingRequired
     *
     * @param int $id
     * @param string $share_type
     * @return JSONResponse
     */
    public function create($id, $share_type) {
        $manager = $this->getManagerForShareType($share_type);
        $shareInfo = $manager->getShare($id);
        
        if ($shareInfo !== false) {
            $mountPoint = $manager->getShareRecipientMountPoint($shareInfo);
            $fileId = $manager->getShareFileId($shareInfo, $mountPoint);

            $event = new GenericEvent(
                null,
                [
                    'shareAcceptedFrom' => $shareInfo['owner'],
                    'sharedAcceptedBy' => $shareInfo['user'],
                    'sharedItem' => $shareInfo['name'],
                    'remoteUrl' => $shareInfo['remote'],
                    'shareId' => $id,
                    'fileId' => $fileId,
                    'shareRecipient' => $shareInfo['user'],
                ]
            );
            $this->dispatcher->dispatch($event, 'remoteshare.accepted');
            $manager->acceptShare($id);
        }
        return new JSONResponse();
    }

    /**
     * @NoAdminRequired
     * @NoOutgoingFederatedSharingRequired
     *
     * @param integer $id
     * @return JSONResponse
     */
    public function destroy($id, $share_type) {
        $manager = $this->getManagerForShareType($share_type);
        $shareInfo = $manager->getShare($id);
        if ($shareInfo !== false) {
            $event = new GenericEvent(
                null,
                [
                    'shareAcceptedFrom' => $shareInfo['owner'],
                    'sharedAcceptedBy' => $shareInfo['user'],
                    'sharedItem' => $shareInfo['name'],
                    'remoteUrl' => $shareInfo['remote']
                ]
            );
            $this->dispatcher->dispatch($event, 'remoteshare.declined');
            $manager->declineShare($id);
        }
        return new JSONResponse();
    }

    private function initGroupExternalManager() {
        // Allow other apps to add an external manager for user-to-group shares
        $managerClass = $this->config->getSystemValue('sharing.groupExternalManager');
        if ($managerClass !== '') {
            return \OC::$server->query($managerClass);
        }
        return null;
    }

    private function getManagerForShareType($share_type) {
        $groupExternalManager = $this->initGroupExternalManager();
        if ($share_type === self::group_share_type && $groupExternalManager !== null) {
            $manager = $groupExternalManager;
        } else {
            $manager = $this->externalManager;
        }
        return $manager;
    }

    /**
     * @PublicPage
     * @NoOutgoingFederatedSharingRequired
     * @NoIncomingFederatedSharingRequired
     *
     * @param string $remote
     * @return DataResponse
     */
    public function testRemote($remote) {
        $response = $this->externalManager->testRemoteUrl($this->clientService, $remote);
        return new DataResponse($response);
    }
}