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<?php
/**
* @copyright Copyright (c) 2016, Roeland Jago Douma <roeland@famdouma.nl>
*
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @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 OCA\PreviewGenerator\Command;
use OCA\PreviewGenerator\SizeHelper;
use OCP\AppFramework\Utility\ITimeFactory;
use OCP\Encryption\IManager;
use OCP\Files\File;
use OCP\Files\IRootFolder;
use OCP\Files\NotFoundException;
use OCP\IConfig;
use OCP\IDBConnection;
use OCP\IPreview;
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 PreGenerate extends Command {
/** @var string */
protected $appName;
/** @var IUserManager */
protected $userManager;
/** @var IRootFolder */
protected $rootFolder;
/** @var IPreview */
protected $previewGenerator;
/** @var IConfig */
protected $config;
/** @var IDBConnection */
protected $connection;
/** @var OutputInterface */
protected $output;
/** @var int[][] */
protected $sizes;
/** @var IManager */
protected $encryptionManager;
/** @var ITimeFactory */
protected $time;
/**
* @param string $appName
* @param IRootFolder $rootFolder
* @param IUserManager $userManager
* @param IPreview $previewGenerator
* @param IConfig $config
* @param IDBConnection $connection
* @param IManager $encryptionManager
* @param ITimeFactory $time
*/
public function __construct($appName,
IRootFolder $rootFolder,
IUserManager $userManager,
IPreview $previewGenerator,
IConfig $config,
IDBConnection $connection,
IManager $encryptionManager,
ITimeFactory $time) {
parent::__construct();
$this->appName = $appName;
$this->userManager = $userManager;
$this->rootFolder = $rootFolder;
$this->previewGenerator = $previewGenerator;
$this->config = $config;
$this->connection = $connection;
$this->encryptionManager = $encryptionManager;
$this->time = $time;
}
protected function configure() {
$this
->setName('preview:pre-generate')
->setDescription('Pre generate previews');
}
/**
* @param InputInterface $input
* @param OutputInterface $output
* @return int
*/
protected function execute(InputInterface $input, OutputInterface $output) {
if ($this->encryptionManager->isEnabled()) {
$output->writeln('Encryption is enabled. Aborted.');
return 1;
}
// Set timestamp output
$formatter = new TimestampFormatter($this->config, $output->getFormatter());
$output->setFormatter($formatter);
$this->output = $output;
$this->sizes = SizeHelper::calculateSizes($this->config);
$this->startProcessing();
return 0;
}
private function startProcessing() {
// random sleep between 0 and 50ms to avoid collision between 2 processes
usleep(rand(0,50000));
while(true) {
$qb = $this->connection->getQueryBuilder();
$row = $qb->select('*')
->from('preview_generation')
->where($qb->expr()->eq('locked', $qb->createNamedParameter(false)))
->setMaxResults(1)
->execute()
->fetch();
if ($row === false) {
break;
}
$qb->update('preview_generation')
->where($qb->expr()->eq('id', $qb->createNamedParameter($row['id'])))
->set('locked', $qb->createNamedParameter(true))
->execute();
try {
$this->processRow($row);
} finally {
$qb->delete('preview_generation')
->where($qb->expr()->eq('id', $qb->createNamedParameter($row['id'])))
->execute();
}
}
}
private function processRow($row) {
//Get user
$user = $this->userManager->get($row['uid']);
if ($user === null) {
return;
}
try {
$userFolder = $this->rootFolder->getUserFolder($user->getUID());
$userRoot = $userFolder->getParent();
} catch (NotFoundException $e) {
return;
}
//Get node
$nodes = $userRoot->getById($row['file_id']);
if ($nodes === []) {
return;
}
$node = $nodes[0];
if ($node instanceof File) {
$this->processFile($node);
}
}
private function processFile(File $file) {
if ($this->previewGenerator->isMimeSupported($file->getMimeType())) {
if ($this->output->getVerbosity() > OutputInterface::VERBOSITY_VERBOSE) {
$this->output->writeln('Generating previews for ' . $file->getPath());
}
try {
foreach ($this->sizes['square'] as $size) {
$this->previewGenerator->getPreview($file, $size, $size, true);
}
// Height previews
foreach ($this->sizes['height'] as $height) {
$this->previewGenerator->getPreview($file, -1, $height, false);
}
// Width previews
foreach ($this->sizes['width'] as $width) {
$this->previewGenerator->getPreview($file, $width, -1, false);
}
} catch (NotFoundException $e) {
if ($this->output->getVerbosity() > OutputInterface::VERBOSITY_VERBOSE) {
$error = $e->getMessage();
$this->output->writeln("<error>${error} " . $file->getPath() . " not found.</error>");
}
} catch (\InvalidArgumentException $e) {
$error = $e->getMessage();
$this->output->writeln("<error>${error}</error>");
}
}
}
}
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