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96 lines
2.3 KiB
PHP
96 lines
2.3 KiB
PHP
<?php
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/**
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* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
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* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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namespace OC\Preview;
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use OCP\Files\File;
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use OCP\Files\FileInfo;
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use OCP\IImage;
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use OCP\ITempManager;
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use OCP\Server;
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use Psr\Log\LoggerInterface;
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abstract class Office extends ProviderV2 {
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/**
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* {@inheritDoc}
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*/
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public function isAvailable(FileInfo $file): bool {
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return is_string($this->options['officeBinary']);
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}
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/**
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* {@inheritDoc}
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*/
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public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
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if (!$this->isAvailable($file)) {
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return null;
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}
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$tempManager = Server::get(ITempManager::class);
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// The file to generate the preview for.
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$absPath = $this->getLocalFile($file);
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if ($absPath === false) {
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Server::get(LoggerInterface::class)->error(
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'Failed to get local file to generate thumbnail for: ' . $file->getPath(),
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['app' => 'core']
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);
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return null;
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}
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// The destination for the LibreOffice user profile.
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// LibreOffice can rune once per user profile and therefore instance id and file id are included.
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$profile = $tempManager->getTemporaryFolder(
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'nextcloud-office-profile-' . \OC_Util::getInstanceId() . '-' . $file->getId()
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);
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// The destination for the LibreOffice convert result.
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$outdir = $tempManager->getTemporaryFolder(
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'nextcloud-office-preview-' . \OC_Util::getInstanceId() . '-' . $file->getId()
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);
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if ($profile === false || $outdir === false) {
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$this->cleanTmpFiles();
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return null;
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}
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$parameters = [
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$this->options['officeBinary'],
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'-env:UserInstallation=file://' . escapeshellarg($profile),
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'--headless',
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'--nologo',
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'--nofirststartwizard',
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'--invisible',
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'--norestore',
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'--convert-to png',
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'--outdir ' . escapeshellarg($outdir),
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escapeshellarg($absPath),
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];
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$cmd = implode(' ', $parameters);
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exec($cmd, $output, $returnCode);
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if ($returnCode !== 0) {
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$this->cleanTmpFiles();
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return null;
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}
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$preview = $outdir . pathinfo($absPath, PATHINFO_FILENAME) . '.png';
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$image = new \OCP\Image();
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$image->loadFromFile($preview);
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$this->cleanTmpFiles();
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if ($image->valid()) {
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$image->scaleDownToFit($maxX, $maxY);
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return $image;
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}
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return null;
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}
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}
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