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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2021, Daniel Calviño Sánchez <danxuliu@gmail.com>
*
* @author Daniel Calviño Sánchez <danxuliu@gmail.com>
*
* @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\Core\Command\Preview;
use OC\Preview\Storage\Root;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\Files\IMimeTypeLoader;
use OCP\Files\NotFoundException;
use OCP\Files\NotPermittedException;
use OCP\IAvatarManager;
use OCP\IDBConnection;
use OCP\IUserManager;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
class ResetRenderedTexts extends Command {
protected IDBConnection $connection;
protected IUserManager $userManager;
protected IAvatarManager $avatarManager;
private Root $previewFolder;
private IMimeTypeLoader $mimeTypeLoader;
public function __construct(IDBConnection $connection,
IUserManager $userManager,
IAvatarManager $avatarManager,
Root $previewFolder,
IMimeTypeLoader $mimeTypeLoader) {
parent::__construct();
$this->connection = $connection;
$this->userManager = $userManager;
$this->avatarManager = $avatarManager;
$this->previewFolder = $previewFolder;
$this->mimeTypeLoader = $mimeTypeLoader;
}
protected function configure() {
$this
->setName('preview:reset-rendered-texts')
->setDescription('Deletes all generated avatars and previews of text and md files')
->addOption('dry', 'd', InputOption::VALUE_NONE, 'Dry mode - will not delete any files - in combination with the verbose mode one could check the operations.');
}
protected function execute(InputInterface $input, OutputInterface $output): int {
$dryMode = $input->getOption('dry');
if ($dryMode) {
$output->writeln('INFO: The command is run in dry mode and will not modify anything.');
$output->writeln('');
}
$this->deleteAvatars($output, $dryMode);
$this->deletePreviews($output, $dryMode);
return 0;
}
private function deleteAvatars(OutputInterface $output, bool $dryMode): void {
$avatarsToDeleteCount = 0;
foreach ($this->getAvatarsToDelete() as [$userId, $avatar]) {
$output->writeln('Deleting avatar for ' . $userId, OutputInterface::VERBOSITY_VERBOSE);
$avatarsToDeleteCount++;
if ($dryMode) {
continue;
}
try {
$avatar->remove();
} catch (NotFoundException $e) {
// continue
} catch (NotPermittedException $e) {
// continue
}
}
$output->writeln('Deleted ' . $avatarsToDeleteCount . ' avatars');
$output->writeln('');
}
private function getAvatarsToDelete(): \Iterator {
foreach ($this->userManager->search('') as $user) {
$avatar = $this->avatarManager->getAvatar($user->getUID());
if (!$avatar->isCustomAvatar()) {
yield [$user->getUID(), $avatar];
}
}
}
private function deletePreviews(OutputInterface $output, bool $dryMode): void {
$previewsToDeleteCount = 0;
foreach ($this->getPreviewsToDelete() as ['name' => $previewFileId, 'path' => $filePath]) {
$output->writeln('Deleting previews for ' . $filePath, OutputInterface::VERBOSITY_VERBOSE);
$previewsToDeleteCount++;
if ($dryMode) {
continue;
}
try {
$preview = $this->previewFolder->getFolder((string)$previewFileId);
$preview->delete();
} catch (NotFoundException $e) {
// continue
} catch (NotPermittedException $e) {
// continue
}
}
$output->writeln('Deleted ' . $previewsToDeleteCount . ' previews');
}
// Copy pasted and adjusted from
// "lib/private/Preview/BackgroundCleanupJob.php".
private function getPreviewsToDelete(): \Iterator {
$qb = $this->connection->getQueryBuilder();
$qb->select('path', 'mimetype')
->from('filecache')
->where($qb->expr()->eq('fileid', $qb->createNamedParameter($this->previewFolder->getId())));
$cursor = $qb->execute();
$data = $cursor->fetch();
$cursor->closeCursor();
if ($data === null) {
return [];
}
/*
* This lovely like is the result of the way the new previews are stored
* We take the md5 of the name (fileid) and split the first 7 chars. That way
* there are not a gazillion files in the root of the preview appdata.
*/
$like = $this->connection->escapeLikeParameter($data['path']) . '/_/_/_/_/_/_/_/%';
$qb = $this->connection->getQueryBuilder();
$qb->select('a.name', 'b.path')
->from('filecache', 'a')
->leftJoin('a', 'filecache', 'b', $qb->expr()->eq(
$qb->expr()->castColumn('a.name', IQueryBuilder::PARAM_INT), 'b.fileid'
))
->where(
$qb->expr()->andX(
$qb->expr()->like('a.path', $qb->createNamedParameter($like)),
$qb->expr()->eq('a.mimetype', $qb->createNamedParameter($this->mimeTypeLoader->getId('httpd/unix-directory'))),
$qb->expr()->orX(
$qb->expr()->eq('b.mimetype', $qb->createNamedParameter($this->mimeTypeLoader->getId('text/plain'))),
$qb->expr()->eq('b.mimetype', $qb->createNamedParameter($this->mimeTypeLoader->getId('text/markdown'))),
$qb->expr()->eq('b.mimetype', $qb->createNamedParameter($this->mimeTypeLoader->getId('text/x-markdown')))
)
)
);
$cursor = $qb->execute();
while ($row = $cursor->fetch()) {
yield $row;
}
$cursor->closeCursor();
}
}
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