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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2022 Julius Härtl <jus@bitgrid.net>
*
* @author Julius Härtl <jus@bitgrid.net>
* @author Kate Döen <kate.doeen@nextcloud.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 OC\Core\Controller;
use OCP\Collaboration\Reference\IReferenceManager;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\DataDownloadResponse;
use OCP\AppFramework\Http\DataResponse;
use OCP\Files\AppData\IAppDataFactory;
use OCP\Files\NotFoundException;
use OCP\Files\NotPermittedException;
use OCP\IRequest;
class ReferenceController extends Controller {
public function __construct(
string $appName,
IRequest $request,
private IReferenceManager $referenceManager,
private IAppDataFactory $appDataFactory,
) {
parent::__construct($appName, $request);
}
/**
* @PublicPage
* @NoCSRFRequired
*
* Get a preview for a reference
*
* @param string $referenceId the reference cache key
* @return DataDownloadResponse<Http::STATUS_OK, string, array{}>|DataResponse<Http::STATUS_NOT_FOUND, '', array{}>
*
* 200: Preview returned
* 404: Reference not found
*/
public function preview(string $referenceId): DataDownloadResponse|DataResponse {
$reference = $this->referenceManager->getReferenceByCacheKey($referenceId);
try {
$appData = $this->appDataFactory->get('core');
$folder = $appData->getFolder('opengraph');
$file = $folder->getFile($referenceId);
$contentType = $reference === null || $reference->getImageContentType() === null
? $file->getMimeType()
: $reference->getImageContentType();
$response = new DataDownloadResponse(
$file->getContent(),
$referenceId,
$contentType
);
} catch (NotFoundException|NotPermittedException $e) {
$response = new DataResponse('', Http::STATUS_NOT_FOUND);
}
$response->cacheFor(3600, false, true);
return $response;
}
}
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