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- <?php
- declare(strict_types=1);
- namespace OC\Core\Controller;
- use OCA\Files_Sharing\SharedStorage;
- use OCP\AppFramework\Controller;
- use OCP\AppFramework\Http;
- use OCP\AppFramework\Http\Attribute\FrontpageRoute;
- use OCP\AppFramework\Http\DataResponse;
- use OCP\AppFramework\Http\FileDisplayResponse;
- use OCP\AppFramework\Http\RedirectResponse;
- use OCP\Files\File;
- use OCP\Files\IRootFolder;
- use OCP\Files\Node;
- use OCP\Files\NotFoundException;
- use OCP\IPreview;
- use OCP\IRequest;
- use OCP\Preview\IMimeIconProvider;
- class PreviewController extends Controller {
- public function __construct(
- string $appName,
- IRequest $request,
- private IPreview $preview,
- private IRootFolder $root,
- private ?string $userId,
- private IMimeIconProvider $mimeIconProvider,
- ) {
- parent::__construct($appName, $request);
- }
-
-
- public function getPreview(
- string $file = '',
- int $x = 32,
- int $y = 32,
- bool $a = false,
- bool $forceIcon = true,
- string $mode = 'fill',
- bool $mimeFallback = false): Http\Response {
- if ($file === '' || $x === 0 || $y === 0) {
- return new DataResponse([], Http::STATUS_BAD_REQUEST);
- }
- try {
- $userFolder = $this->root->getUserFolder($this->userId);
- $node = $userFolder->get($file);
- } catch (NotFoundException $e) {
- return new DataResponse([], Http::STATUS_NOT_FOUND);
- }
- return $this->fetchPreview($node, $x, $y, $a, $forceIcon, $mode, $mimeFallback);
- }
-
-
- public function getPreviewByFileId(
- int $fileId = -1,
- int $x = 32,
- int $y = 32,
- bool $a = false,
- bool $forceIcon = true,
- string $mode = 'fill',
- bool $mimeFallback = false) {
- if ($fileId === -1 || $x === 0 || $y === 0) {
- return new DataResponse([], Http::STATUS_BAD_REQUEST);
- }
- $userFolder = $this->root->getUserFolder($this->userId);
- $node = $userFolder->getFirstNodeById($fileId);
- if (!$node) {
- return new DataResponse([], Http::STATUS_NOT_FOUND);
- }
- return $this->fetchPreview($node, $x, $y, $a, $forceIcon, $mode, $mimeFallback);
- }
-
- private function fetchPreview(
- Node $node,
- int $x,
- int $y,
- bool $a,
- bool $forceIcon,
- string $mode,
- bool $mimeFallback = false) : Http\Response {
- if (!($node instanceof File) || (!$forceIcon && !$this->preview->isAvailable($node))) {
- return new DataResponse([], Http::STATUS_NOT_FOUND);
- }
- if (!$node->isReadable()) {
- return new DataResponse([], Http::STATUS_FORBIDDEN);
- }
- $storage = $node->getStorage();
- if ($storage->instanceOfStorage(SharedStorage::class)) {
-
- $share = $storage->getShare();
- $attributes = $share->getAttributes();
- if ($attributes !== null && $attributes->getAttribute('permissions', 'download') === false) {
- return new DataResponse([], Http::STATUS_FORBIDDEN);
- }
- }
- try {
- $f = $this->preview->getPreview($node, $x, $y, !$a, $mode);
- $response = new FileDisplayResponse($f, Http::STATUS_OK, [
- 'Content-Type' => $f->getMimeType(),
- ]);
- $response->cacheFor(3600 * 24, false, true);
- return $response;
- } catch (NotFoundException $e) {
-
- if ($mimeFallback) {
- if ($url = $this->mimeIconProvider->getMimeIconUrl($node->getMimeType())) {
- 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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