<?php

namespace Symfony\Bundle\DoctrineMigrationsBundle\DependencyInjection;

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

/**

 * DoctrineMigrationsExtension configuration structure.

 *

 * @author Lukas Kahwe Smith <smith@pooteeweet.org>

 */

class Configuration

{

    /**

     * Generates the configuration tree.

     *

     * @return \Symfony\Component\Config\Definition\ArrayNode The config tree

     */

    public function getConfigTree()

    {

        $treeBuilder = new TreeBuilder();

        $rootNode = $treeBuilder->root('doctrine_migrations', 'array');

        $rootNode

            ->children()

                ->scalarNode('dir_name')->defaultValue('%kernel.root_dir%/DoctrineMigrations')->cannotBeEmpty()->end()

                ->scalarNode('namespace')->defaultValue('Application\Migrations')->cannotBeEmpty()->end()

                ->scalarNode('table_name')->defaultValue('migration_versions')->cannotBeEmpty()->end()

                ->scalarNode('name')->defaultValue('Application Migrations')->end()

            ->end()

        ;

        return $treeBuilder->buildTree();

    }

}