File OpenSearch/Exception/ErrorMessageExtractor.php

1:	<?php
2:
3:	declare(strict_types=1);
4:
5:	namespace OpenSearch\Exception;
6:
7:	/**
8:	* Extracts an error message from the response body.
9:	*/
10:	class ErrorMessageExtractor
11:	{
12:	public static function extractErrorMessage(string\|array\|null $data): ?string
13:	{
14:	if (is_string($data) \|\| is_null($data)) {
15:	return $data;
16:	}
17:
18:	// Must be an array now.
19:	if (!isset($data['error'])) {
20:	// <2.0 "i just blew up" non-structured exception.
21:	// $error is an array, but we don't know the format, so we reuse the response body instead
22:	// added json_encode to convert into a string
23:	return json_encode($data);
24:	}
25:
26:	// 2.0 structured exceptions
27:	if (is_array($data['error']) && array_key_exists('reason', $data['error'])) {
28:	// Try to use root cause first (only grabs the first root cause)
29:	$info = $data['error']['root_cause'][0] ?? $data['error'];
30:	$cause = $info['reason'];
31:	$type = $info['type'];
32:
33:	return "$type: $cause";
34:	}
35:
36:	// <2.0 semi-structured exceptions
37:	$legacyError = $data['error'];
38:	if (is_array($legacyError)) {
39:	return json_encode($legacyError);
40:	}
41:	return $legacyError;
42:	}
43:	}
44: