server/apps/user_ldap/command/deleteconfig.php

<?php
/**
 * @author Arthur Schiwon <blizzz@owncloud.com>
 * @author Martin Konrad <info@martin-konrad.net>
 * @author Morris Jobke <hey@morrisjobke.de>
 *
 * @copyright Copyright (c) 2015, ownCloud, Inc.
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OCA\user_ldap\Command;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use \OCA\user_ldap\lib\Helper;

class DeleteConfig extends Command {
	/** @var \OCA\User_LDAP\lib\Helper */
	protected $helper;

	/**
	 * @param Helper $helper
	 */
	public function __construct(Helper $helper) {
		$this->helper = $helper;
		parent::__construct();
	}

	protected function configure() {
		$this
			->setName('ldap:delete-config')
			->setDescription('deletes an existing LDAP configuration')
			->addArgument(
					'configID',
					InputArgument::REQUIRED,
					'the configuration ID'
				     )
		;
	}


	protected function execute(InputInterface $input, OutputInterface $output) {
		$configPrefix = $input->getArgument('configID');

		$success = $this->helper->deleteServerConfiguration($configPrefix);

		if($success) {
			$output->writeln("Deleted configuration with configID '{$configPrefix}'");
		} else {
			$output->writeln("Cannot delete configuration with configID '{$configPrefix}'");
		}
	}
}