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author | Julius Härtl <jus@bitgrid.net> | 2020-04-05 10:59:55 +0200 |
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committer | Julius Härtl <jus@bitgrid.net> | 2020-04-08 16:24:09 +0200 |
commit | 0734582c062da9dad11562c68730d4e752b08acd (patch) | |
tree | 1b209b6cbf370bbd6bb69ab2ea1dceafb176fac1 /lib | |
parent | 981278a666370ce40d144ea8d7783e712605c1c0 (diff) | |
download | nextcloud-server-0734582c062da9dad11562c68730d4e752b08acd.tar.gz nextcloud-server-0734582c062da9dad11562c68730d4e752b08acd.zip |
Add abstract class to extract previews from files that are zip archives
Signed-off-by: Julius Härtl <jus@bitgrid.net>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/private/Preview/Bundled.php | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/private/Preview/Bundled.php b/lib/private/Preview/Bundled.php new file mode 100644 index 00000000000..6f3d811ca61 --- /dev/null +++ b/lib/private/Preview/Bundled.php @@ -0,0 +1,58 @@ +<?php +/** + * @copyright Copyright (c) 2020 Julius Härtl <jus@bitgrid.net> + * + * @author Julius Härtl <jus@bitgrid.net> + * + * @license GNU AGPL version 3 or any later version + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +namespace OC\Preview; + +use OCP\Files\File; +use OCP\Files\NotPermittedException; +use OCP\IImage; +use OCP\Lock\LockedException; + +/** + * Extracts a preview from files that embed them in an ZIP archive + */ +abstract class Bundled extends ProviderV2 { + + protected function extractThumbnail(File $file, $path): ?IImage { + $sourceTmp = \OC::$server->getTempManager()->getTemporaryFile(); + $targetTmp = \OC::$server->getTempManager()->getTemporaryFile(); + + try { + $content = $file->fopen('r'); + $content = stream_get_contents($content); + file_put_contents($sourceTmp, $content); + + $zip = new \OC\Archive\ZIP($sourceTmp); + $zip->extractFile($path, $targetTmp); + + $image = new \OC_Image(); + $image->loadFromFile($targetTmp); + $image->fixOrientation(); + + return $image; + } catch (\Exception $e) { + return null; + } + } + +} |