<?php

/*
 * This file is part of the Monolog package.
 *
 * (c) Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Monolog\Formatter;

/**
 * Normalizes incoming records to remove objects/resources so it's easier to dump to various targets
 *
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class NormalizerFormatter implements FormatterInterface
{
    const SIMPLE_DATE = "Y-m-d H:i:s";

    protected $dateFormat;

    /**
     * @param string $dateFormat The format of the timestamp: one supported by DateTime::format
     */
    public function __construct($dateFormat = null)
    {
        $this->dateFormat = $dateFormat ?: static::SIMPLE_DATE;
    }

    /**
     * {@inheritdoc}
     */
    public function format(array $record)
    {
        return $this->normalize($record);
    }

    /**
     * {@inheritdoc}
     */
    public function formatBatch(array $records)
    {
        foreach ($records as $key => $record) {
            $records[$key] = $this->format($record);
        }

        return $records;
    }

    protected function normalize($data)
    {
        if (null === $data || is_scalar($data)) {
            return $data;
        }

        if (is_array($data) || $data instanceof \Traversable) {
            $normalized = array();

            foreach ($data as $key => $value) {
                $normalized[$key] = $this->normalize($value);
            }

            return $normalized;
        }

        if ($data instanceof \DateTime) {
            return $data->format($this->dateFormat);
        }

        if (is_resource($data)) {
            return '[resource]';
        }

        return sprintf("[object] (%s: %s)", get_class($data), $this->toJson($data));
    }

    protected function toJson($data)
    {
        if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
            return json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
        }

        return json_encode($data);
    }
}