<?php

/**
 * Part of the Joomla Framework Registry Package
 *
 * @copyright  Copyright (C) 2013 Open Source Matters, Inc.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

namespace Joomla\Registry\Format;

use Joomla\Registry\FormatInterface;
use Symfony\Component\Yaml\Dumper as SymfonyYamlDumper;
use Symfony\Component\Yaml\Parser as SymfonyYamlParser;
use Symfony\Component\Yaml\Yaml as SymfonyYaml;

use function sprintf;

/**
 * YAML format handler for Registry.
 *
 * @since  1.0.0
 */
class Yaml implements FormatInterface
{
    /**
     * The YAML parser class.
     *
     * @var    SymfonyYamlParser
     * @since  1.0.0
     */
    private $parser;

    /**
     * The YAML dumper class.
     *
     * @var    SymfonyYamlDumper
     * @since  1.0.0
     */
    private $dumper;

    /**
     * Construct to set up the parser and dumper
     *
     * @since   1.0.0
     */
    public function __construct()
    {
        if (!\class_exists(SymfonyYaml::class)) {
            throw new \RuntimeException(
                \sprintf(
                    'The "%s" class could not be found, make sure you have installed the "symfony/yaml" package.',
                    SymfonyYaml::class
                )
            );
        }

        $this->parser = new SymfonyYamlParser();
        $this->dumper = new SymfonyYamlDumper();
    }

    /**
     * Converts an object into a YAML formatted string.
     * We use json_* to convert the passed object to an array.
     *
     * @param  object|array  $object   Data source object.
     * @param  array   $options  Options used by the formatter.
     *
     * @return  string  YAML formatted string.
     *
     * @since   1.0.0
     */
    public function objectToString($object, array $options = [])
    {
        $array = \json_decode(\json_encode($object), true);

        return $this->dumper->dump($array, 2, 0);
    }

    /**
     * Parse a YAML formatted string and convert it into an object.
     * We use the json_* methods to convert the parsed YAML array to an object.
     *
     * @param  string  $data     YAML formatted string to convert.
     * @param  array   $options  Options used by the formatter.
     *
     * @return  object  Data object.
     *
     * @since   1.0.0
     */
    public function stringToObject($data, array $options = [])
    {
        $array = $this->parser->parse(\trim($data));

        return (object) \json_decode(\json_encode($array));
    }
}
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