1<?php
2
3declare(strict_types = 1);
4
5namespace Elasticsearch\Serializers;
6
7use Elasticsearch\Common\Exceptions;
8use Elasticsearch\Common\Exceptions\Serializer\JsonErrorException;
9
10if (!defined('JSON_INVALID_UTF8_SUBSTITUTE')) {
11    //PHP < 7.2 Define it as 0 so it does nothing
12    define('JSON_INVALID_UTF8_SUBSTITUTE', 0);
13}
14
15/**
16 * Class SmartSerializer
17 *
18 * @category Elasticsearch
19 * @package  Elasticsearch\Serializers\JSONSerializer
20 * @author   Zachary Tong <zach@elastic.co>
21 * @license  http://www.apache.org/licenses/LICENSE-2.0 Apache2
22 * @link     http://elastic.co
23 */
24class SmartSerializer implements SerializerInterface
25{
26    /**
27     * {@inheritdoc}
28     */
29    public function serialize($data): string
30    {
31        if (is_string($data) === true) {
32            return $data;
33        } else {
34            $data = json_encode($data, JSON_PRESERVE_ZERO_FRACTION + JSON_INVALID_UTF8_SUBSTITUTE);
35            if ($data === false) {
36                throw new Exceptions\RuntimeException("Failed to JSON encode: ".json_last_error());
37            }
38            if ($data === '[]') {
39                return '{}';
40            } else {
41                return $data;
42            }
43        }
44    }
45
46    /**
47     * {@inheritdoc}
48     */
49    public function deserialize(?string $data, array $headers)
50    {
51        if (isset($headers['content_type']) === true) {
52            if (strpos($headers['content_type'], 'json') !== false) {
53                return $this->decode($data);
54            } else {
55                //Not json, return as string
56                return $data;
57            }
58        } else {
59            //No content headers, assume json
60            return $this->decode($data);
61        }
62    }
63
64    /**
65     * @todo For 2.0, remove the E_NOTICE check before raising the exception.
66     *
67     * @param string|null $data
68     *
69     * @return array
70     * @throws JsonErrorException
71     */
72    private function decode(?string $data): array
73    {
74        if ($data === null || strlen($data) === 0) {
75            return [];
76        }
77
78        if (version_compare(PHP_VERSION, '7.3.0') >= 0) {
79            try {
80                $result = json_decode($data, true, 512, JSON_THROW_ON_ERROR);
81                return $result;
82            } catch (\JsonException $e) {
83                $result = $result ?? [];
84                throw new JsonErrorException($e->getMessage(), $data, $result);
85            }
86        }
87
88        $result = @json_decode($data, true);
89        // Throw exception only if E_NOTICE is on to maintain backwards-compatibility on systems that silently ignore E_NOTICEs.
90        if (json_last_error() !== JSON_ERROR_NONE && (error_reporting() & E_NOTICE) === E_NOTICE) {
91            throw new JsonErrorException(json_last_error(), $data, $result);
92        }
93        return $result;
94    }
95}
96