tos/DependencyInjection/Configuration.php

<?php
/**
 * Copyright (C) 2018 Lars Vierbergen
 *
 * 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 vierbergenlars\AuthserverTosBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

/**
 * This is the class that validates and merges configuration from your app/config files.
 *
 * To learn more see {@link http://symfony.com/doc/current/cookbook/bundles/configuration.html}
 */
class Configuration implements ConfigurationInterface
{

    /**
     *
     * {@inheritdoc}
     */
    public function getConfigTreeBuilder()
    {
        $treeBuilder = new TreeBuilder();
        $rootNode = $treeBuilder->root('tos');

        // @formatter:off
        $rootNode
            ->children()
                ->arrayNode('terms')
                    ->prototype('array')
                        ->children()
                            ->scalarNode('label')->defaultNull()->info('Label for how the terms are named (terms of service, privacy policy, ...)')->end()
                            ->scalarNode('url')->defaultNull()->info('Link to the terms of service')->end()
                        ->end()
                    ->end()
                ->end()
                ->integerNode('version')->defaultValue(0)->info('Version of the terms of service')->end()
            ->end();
        // @formatter:on

        return $treeBuilder;
    }
}