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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2019 Joas Schilling <coding@schilljs.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 OCA\Talk\Chat\Command;
class ShellExecutor {
public const PLACEHOLDER_ROOM = '{ROOM}';
public const PLACEHOLDER_USER = '{USER}';
public const PLACEHOLDER_ARGUMENTS = '{ARGUMENTS}';
// Legacy placeholder just returning the --help nowadays
public const PLACEHOLDER_ARGUMENTS_DOUBLEQUOTE_ESCAPED = '{ARGUMENTS_DOUBLEQUOTE_ESCAPED}';
/**
* @param string $cmd
* @param string $arguments
* @param string $room
* @param string $user
* @return string
* @throws \InvalidArgumentException
*/
public function execShell(string $cmd, string $arguments, string $room = '', string $user = ''): string {
if (strpos($cmd, self::PLACEHOLDER_ARGUMENTS_DOUBLEQUOTE_ESCAPED) !== false) {
throw new \InvalidArgumentException('Talk commands using the {ARGUMENTS_DOUBLEQUOTE_ESCAPED} are not supported anymore.');
}
$cmd = str_replace([
self::PLACEHOLDER_ROOM,
self::PLACEHOLDER_USER,
self::PLACEHOLDER_ARGUMENTS,
], [
escapeshellarg($room),
escapeshellarg($user),
escapeshellarg($arguments),
], $cmd);
return $this->wrapExec($cmd);
}
/**
* @param string $cmd
* @return string
* @throws \InvalidArgumentException
*/
protected function wrapExec(string $cmd): string {
$output = [];
$returnCode = 0;
@exec($cmd, $output, $returnCode);
if ($returnCode) {
throw new \InvalidArgumentException('Chat command failed [Code: ' . $returnCode . ']: ' . $cmd);
}
return implode("\n", $output);
}
}
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