owncloud/core

<?php
/**
 * @author Joas Schilling <coding@schilljs.com>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @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 OC\Core\Command\Config\System;

use OC\Core\Command\Base;
use OC\SystemConfig;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

class DeleteConfig extends Base {
    /** * @var SystemConfig */
    protected $systemConfig;

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

    protected function configure() {
        parent::configure();

        $this
            ->setName('config:system:delete')
            ->setDescription('Delete a system config value.')
            ->addArgument(
                'name',
                InputArgument::REQUIRED | InputArgument::IS_ARRAY,
                'Name of the config to delete, specify multiple for array parameter.'
            )
            ->addOption(
                'error-if-not-exists',
                null,
                InputOption::VALUE_NONE,
                'Checks whether the config exists before deleting it.'
            )
        ;
    }

    protected function execute(InputInterface $input, OutputInterface $output): int {
        $configNames = $input->getArgument('name');
        $configName = $configNames[0];

        if (\sizeof($configNames) > 1) {
            if ($input->hasParameterOption('--error-if-not-exists') && !\in_array($configName, $this->systemConfig->getKeys())) {
                $output->writeln('<error>System config ' . \implode(' => ', $configNames) . ' could not be deleted because it did not exist</error>');
                return 1;
            }

            $value = $this->systemConfig->getValue($configName);

            try {
                $value = $this->removeSubValue(\array_slice($configNames, 1), $value, $input->hasParameterOption('--error-if-not-exists'));
            } catch (\UnexpectedValueException $e) {
                $output->writeln('<error>System config ' . \implode(' => ', $configNames) . ' could not be deleted because it did not exist</error>');
                return 1;
            }

            $this->systemConfig->setValue($configName, $value);
            $output->writeln('<info>System config value ' . \implode(' => ', $configNames) . ' deleted</info>');
            return 0;
        } else {
            if ($input->hasParameterOption('--error-if-not-exists') && !\in_array($configName, $this->systemConfig->getKeys())) {
                $output->writeln('<error>System config ' . $configName . ' could not be deleted because it did not exist</error>');
                return 1;
            }

            $this->systemConfig->deleteValue($configName);
            $output->writeln('<info>System config value ' . $configName . ' deleted</info>');
            return 0;
        }
    }

    protected function removeSubValue($keys, $currentValue, $throwError) {
        $nextKey = \array_shift($keys);

        if (\is_array($currentValue)) {
            if (isset($currentValue[$nextKey])) {
                if (empty($keys)) {
                    unset($currentValue[$nextKey]);
                } else {
                    $currentValue[$nextKey] = $this->removeSubValue($keys, $currentValue[$nextKey], $throwError);
                }
            } elseif ($throwError) {
                throw new \UnexpectedValueException('Config parameter does not exist');
            }
        } elseif ($throwError) {
            throw new \UnexpectedValueException('Config parameter does not exist');
        }

        return $currentValue;
    }
}