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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * SPDX-FileCopyrightText: 2026 LibreCode coop and contributors |
| 7 | * SPDX-License-Identifier: AGPL-3.0-or-later |
| 8 | */ |
| 9 | |
| 10 | namespace OCA\Libresign\Service\File\Pdf; |
| 11 | |
| 12 | use OCA\Libresign\Exception\LibresignException; |
| 13 | use OCA\Libresign\Vendor\Smalot\PdfParser\Document; |
| 14 | use OCA\Libresign\Vendor\Smalot\PdfParser\Parser; |
| 15 | use OCP\IL10N; |
| 16 | use Psr\Log\LoggerInterface; |
| 17 | |
| 18 | class PdfParser { |
| 19 | /** |
| 20 | * Semantic error code for a file that could not be parsed as a valid PDF document. |
| 21 | */ |
| 22 | public const int CODE_INVALID_PDF = 4220; |
| 23 | |
| 24 | public function __construct( |
| 25 | private LoggerInterface $logger, |
| 26 | private IL10N $l10n, |
| 27 | ) { |
| 28 | } |
| 29 | |
| 30 | /** |
| 31 | * Parse PDF content and return Document object |
| 32 | * |
| 33 | * @param string $content PDF content |
| 34 | * @param string $fileName File name for error messages |
| 35 | * @return Document |
| 36 | * @throws LibresignException |
| 37 | */ |
| 38 | public function parse(string $content, string $fileName): Document { |
| 39 | try { |
| 40 | $parser = new Parser(); |
| 41 | return $parser->parseContent($content); |
| 42 | } catch (\Throwable $th) { |
| 43 | $this->throwIfEncryptedPdf($th, $fileName); |
| 44 | |
| 45 | $this->logger->error('PDF parsing failed: ' . $th->getMessage()); |
| 46 | |
| 47 | // TRANSLATORS %s is the file name that could not be processed as PDF |
| 48 | throw new LibresignException($this->l10n->t('Unable to process the file as a PDF document: %s', [$fileName]), self::CODE_INVALID_PDF); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * @throws LibresignException Only if the PDF is encrypted/password-protected |
| 54 | */ |
| 55 | private function throwIfEncryptedPdf(\Throwable $th, string $fileName): void { |
| 56 | if ($th->getMessage() !== 'Secured pdf file are currently not supported.') { |
| 57 | return; |
| 58 | } |
| 59 | |
| 60 | // TRANSLATORS %s is the name of the password-protected PDF file |
| 61 | throw new LibresignException($this->l10n->t('The file "%s" is password-protected. Please remove the protection and try again.', [$fileName])); |
| 62 | } |
| 63 | } |