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<?php
/**
* SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\Files_Versions\Controller;
use OCA\Files_Versions\Versions\IVersionManager;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\Attribute\NoAdminRequired;
use OCP\AppFramework\Http\Attribute\NoCSRFRequired;
use OCP\AppFramework\Http\Attribute\OpenAPI;
use OCP\AppFramework\Http\DataResponse;
use OCP\AppFramework\Http\FileDisplayResponse;
use OCP\AppFramework\Http\RedirectResponse;
use OCP\Files\IRootFolder;
use OCP\Files\NotFoundException;
use OCP\IPreview;
use OCP\IRequest;
use OCP\IUserSession;
use OCP\Preview\IMimeIconProvider;
#[OpenAPI(scope: OpenAPI::SCOPE_DEFAULT)]
class PreviewController extends Controller {
public function __construct(
string $appName,
IRequest $request,
private IRootFolder $rootFolder,
private IUserSession $userSession,
private IVersionManager $versionManager,
private IPreview $previewManager,
private IMimeIconProvider $mimeIconProvider,
) {
parent::__construct($appName, $request);
}
/**
* Get the preview for a file version
*
* @param string $file Path of the file
* @param int $x Width of the preview
* @param int $y Height of the preview
* @param string $version Version of the file to get the preview for
* @param bool $mimeFallback Whether to fallback to the mime icon if no preview is available
* @return FileDisplayResponse<Http::STATUS_OK, array{Content-Type: string}>|DataResponse<Http::STATUS_BAD_REQUEST|Http::STATUS_NOT_FOUND, list<empty>, array{}>|RedirectResponse<Http::STATUS_SEE_OTHER, array{}>
*
* 200: Preview returned
* 303: Redirect to the mime icon url if mimeFallback is true
* 400: Getting preview is not possible
* 404: Preview not found
*/
#[NoAdminRequired]
#[NoCSRFRequired]
public function getPreview(
string $file = '',
int $x = 44,
int $y = 44,
string $version = '',
bool $mimeFallback = false,
) {
if ($file === '' || $version === '' || $x === 0 || $y === 0) {
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
$versionFile = null;
try {
$user = $this->userSession->getUser();
$userFolder = $this->rootFolder->getUserFolder($user->getUID());
$file = $userFolder->get($file);
$versionFile = $this->versionManager->getVersionFile($user, $file, $version);
$preview = $this->previewManager->getPreview($versionFile, $x, $y, true, IPreview::MODE_FILL, $versionFile->getMimetype());
$response = new FileDisplayResponse($preview, Http::STATUS_OK, ['Content-Type' => $preview->getMimeType()]);
$response->cacheFor(3600 * 24, false, true);
return $response;
} catch (NotFoundException $e) {
// If we have no preview enabled, we can redirect to the mime icon if any
if ($mimeFallback && $versionFile !== null) {
$url = $this->mimeIconProvider->getMimeIconUrl($versionFile->getMimeType());
if ($url !== null) {
return new RedirectResponse($url);
}
}
return new DataResponse([], Http::STATUS_NOT_FOUND);
} catch (\InvalidArgumentException $e) {
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
}
}
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