trashManager = $trashManager; $this->rootFolder = $rootFolder; $this->userSession = $userSession; $this->mimeTypeDetector = $mimeTypeDetector; $this->previewManager = $previewManager; $this->time = $time; } /** * @NoAdminRequired * @NoCSRFRequired * * Get the preview for a file * * @param int $fileId ID of the file * @param int $x Width of the preview * @param int $y Height of the preview * @param bool $a Whether to not crop the preview * * @return Http\FileDisplayResponse|DataResponse, array{}> * * 200: Preview returned * 400: Getting preview is not possible * 404: Preview not found */ public function getPreview( int $fileId = -1, int $x = 32, int $y = 32, bool $a = false, ) { if ($fileId === -1 || $x === 0 || $y === 0) { return new DataResponse([], Http::STATUS_BAD_REQUEST); } try { $file = $this->trashManager->getTrashNodeById($this->userSession->getUser(), $fileId); if ($file === null) { return new DataResponse([], Http::STATUS_NOT_FOUND); } if ($file instanceof Folder) { return new DataResponse([], Http::STATUS_BAD_REQUEST); } $pathParts = pathinfo($file->getName()); $extension = $pathParts['extension'] ?? ''; $fileName = $pathParts['filename']; /* * Files in the root of the trashbin are timetamped. * So we have to strip that in order to properly detect the mimetype of the file. */ if (preg_match('/d\d+/', $extension)) { $mimeType = $this->mimeTypeDetector->detectPath($fileName); } else { $mimeType = $this->mimeTypeDetector->detectPath($file->getName()); } $f = $this->previewManager->getPreview($file, $x, $y, !$a, IPreview::MODE_FILL, $mimeType); $response = new Http\FileDisplayResponse($f, Http::STATUS_OK, ['Content-Type' => $f->getMimeType()]); // Cache previews for 24H $response->cacheFor(3600 * 24); return $response; } catch (NotFoundException $e) { return new DataResponse([], Http::STATUS_NOT_FOUND); } catch (\InvalidArgumentException $e) { return new DataResponse([], Http::STATUS_BAD_REQUEST); } } }