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Bundled.php 1.7 KB

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  1. <?php
  2. /**
  3. * @copyright Copyright (c) 2020 Julius Härtl <jus@bitgrid.net>
  4. *
  5. * @author Julius Härtl <jus@bitgrid.net>
  6. *
  7. * @license GNU AGPL version 3 or any later version
  8. *
  9. * This program is free software: you can redistribute it and/or modify
  10. * it under the terms of the GNU Affero General Public License as
  11. * published by the Free Software Foundation, either version 3 of the
  12. * License, or (at your option) any later version.
  13. *
  14. * This program is distributed in the hope that it will be useful,
  15. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17. * GNU Affero General Public License for more details.
  18. *
  19. * You should have received a copy of the GNU Affero General Public License
  20. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  21. *
  22. */
  23. namespace OC\Preview;
  24. use OC\Archive\ZIP;
  25. use OCP\Files\File;
  26. use OCP\IImage;
  27. /**
  28. * Extracts a preview from files that embed them in an ZIP archive
  29. */
  30. abstract class Bundled extends ProviderV2 {
  31. protected function extractThumbnail(File $file, string $path): ?IImage {
  32. if ($file->getSize() === 0) {
  33. return null;
  34. }
  35. $sourceTmp = \OC::$server->getTempManager()->getTemporaryFile();
  36. $targetTmp = \OC::$server->getTempManager()->getTemporaryFile();
  37. $this->tmpFiles[] = $sourceTmp;
  38. $this->tmpFiles[] = $targetTmp;
  39. try {
  40. $content = $file->fopen('r');
  41. file_put_contents($sourceTmp, $content);
  42. $zip = new ZIP($sourceTmp);
  43. $zip->extractFile($path, $targetTmp);
  44. $image = new \OCP\Image();
  45. $image->loadFromFile($targetTmp);
  46. $image->fixOrientation();
  47. return $image;
  48. } catch (\Throwable $e) {
  49. return null;
  50. }
  51. }
  52. }