<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE_YAML
 * file that was distributed with this source code.
 */

namespace Mage\Yaml;

use Mage\Yaml\Parser;
use Mage\Yaml\Dumper;
use Mage\Yaml\Exception\ParseException;

/**
 * Yaml offers convenience methods to load and dump YAML.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 *
 * @api
 */
class Yaml
{
    /**
     * Parses YAML into a PHP array.
     *
     * The parse method, when supplied with a YAML stream (string or file),
     * will do its best to convert YAML in a file into a PHP array.
     *
     *  Usage:
     *  <code>
     *   $array = Yaml::parse('config.yml');
     *   print_r($array);
     *  </code>
     *
     * As this method accepts both plain strings and file names as an input,
     * you must validate the input before calling this method. Passing a file
     * as an input is a deprecated feature and will be removed in 3.0.
     *
     * @param string $input Path to a YAML file or a string containing YAML
     * @param bool $exceptionOnInvalidType True if an exception must be thrown on invalid types false otherwise
     * @param bool $objectSupport True if object support is enabled, false otherwise
     *
     * @return array The YAML converted to a PHP array
     *
     * @throws ParseException If the YAML is not valid
     *
     * @api
     */
    public static function parse($input, $exceptionOnInvalidType = false, $objectSupport = false)
    {
        // if input is a file, process it
        $file = '';
        if (strpos($input, "\n") === false && is_file($input)) {
            if (false === is_readable($input)) {
                throw new ParseException(sprintf('Unable to parse "%s" as the file is not readable.', $input));
            }

            $file = $input;
            $input = file_get_contents($file);
        }

        $yaml = new Parser();

        try {
            return $yaml->parse($input, $exceptionOnInvalidType, $objectSupport);
        } catch (ParseException $e) {
            if ($file) {
                $e->setParsedFile($file);
            }

            throw $e;
        }
    }

    /**
     * Dumps a PHP array to a YAML string.
     *
     * The dump method, when supplied with an array, will do its best
     * to convert the array into friendly YAML.
     *
     * @param array $array PHP array
     * @param int $inline The level where you switch to inline YAML
     * @param int $indent The amount of spaces to use for indentation of nested nodes.
     * @param bool $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
     * @param bool $objectSupport true if object support is enabled, false otherwise
     *
     * @return string A YAML string representing the original PHP array
     *
     * @api
     */
    public static function dump($array, $inline = 2, $indent = 4, $exceptionOnInvalidType = false, $objectSupport = false)
    {
        $yaml = new Dumper();
        $yaml->setIndentation($indent);

        return $yaml->dump($array, $inline, 0, $exceptionOnInvalidType, $objectSupport);
    }
}