nextcloud/lib/private/Files/Stream/CountReadStream.php

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<?php declare(strict_types=1);
/**
* @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.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 OC\Files\Stream;
use Icewind\Streams\Wrapper;
class CountReadStream extends Wrapper {
/** @var int */
private $count;
/** @var callback */
private $callback;
public static function wrap($source, $callback) {
$context = stream_context_create(array(
'count' => array(
'source' => $source,
'callback' => $callback,
)
));
return Wrapper::wrapSource($source, $context, 'count', self::class);
}
public function dir_opendir($path, $options) {
return false;
}
public function stream_open($path, $mode, $options, &$opened_path) {
$context = $this->loadContext('count');
$this->callback = $context['callback'];
return true;
}
public function stream_read($count) {
$result = parent::stream_read($count);
$this->count += strlen($result);
return $result;
}
public function stream_close() {
$result = parent::stream_close();
call_user_func($this->callback, $this->count);
return $result;
}
}