opnform/app/Service/OpenAi/Utils/JsonFixer.php

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<?php
namespace App\Service\OpenAi\Utils;
/*
* This file is part of the PHP-JSON-FIXER package.
*
* (c) Jitendra Adhikari <jiten.adhikary@gmail.com>
* <https://github.com/adhocore>
*
* Licensed under MIT license.
*/
use App\Exceptions\Coursework\InvalidJsonException;
/**
* Attempts to fix truncated JSON by padding contextual counterparts at the end.
*
* @author Jitendra Adhikari <jiten.adhikary@gmail.com>
* @license MIT
*
* @link https://github.com/adhocore/php-json-fixer
*/
class JsonFixer
{
use PadsJson;
/** @var array Current token stack indexed by position */
protected $stack = [];
/** @var bool If current char is within a string */
protected $inStr = false;
/** @var bool Whether to throw Exception on failure */
protected $silent = false;
/** @var array The complementary pairs */
protected $pairs = [
'{' => '}',
'[' => ']',
'"' => '"',
];
/** @var int The last seen object `{` type position */
protected $objectPos = -1;
/** @var int The last seen array `[` type position */
protected $arrayPos = -1;
/** @var string Missing value. (Options: true, false, null) */
protected $missingValue = 'null';
/**
* Set/unset silent mode.
*
* @param bool $silent
*
* @return $this
*/
public function silent($silent = true)
{
$this->silent = (bool)$silent;
return $this;
}
/**
* Set missing value.
*
* @param mixed $value
*
* @return $this
*/
public function missingValue($value)
{
if ($value === null) {
$value = 'null';
} elseif (\is_bool($value)) {
$value = $value ? 'true' : 'false';
}
$this->missingValue = $value;
return $this;
}
/**
* Fix the truncated JSON.
*
* @param string $json The JSON string to fix.
*
* @return string Fixed JSON. If failed with silent then original JSON.
* @throws InvalidJsonException When fixing fails.
*
*/
public function fix($json)
{
list($head, $json, $tail) = $this->trim($json);
if (empty($json) || $this->isValid($json)) {
return $json;
}
if (null !== $tmpJson = $this->quickFix($json)) {
return $tmpJson;
}
$this->reset();
return $head . $this->doFix($json) . $tail;
}
protected function trim($json)
{
\preg_match('/^(\s*)([^\s]+)(\s*)$/', $json, $match);
$match += ['', '', '', ''];
$match[2] = \trim($json);
\array_shift($match);
return $match;
}
protected function isValid($json)
{
\json_decode($json);
return \JSON_ERROR_NONE === \json_last_error();
}
protected function quickFix($json)
{
if (\strlen($json) === 1 && isset($this->pairs[$json])) {
return $json . $this->pairs[$json];
}
if ($json[0] !== '"') {
return $this->maybeLiteral($json);
}
return $this->padString($json);
}
protected function reset()
{
$this->stack = [];
$this->inStr = false;
$this->objectPos = -1;
$this->arrayPos = -1;
}
protected function maybeLiteral($json)
{
if (!\in_array($json[0], ['t', 'f', 'n'])) {
return null;
}
foreach (['true', 'false', 'null'] as $literal) {
if (\strpos($literal, $json) === 0) {
return $literal;
}
}
// @codeCoverageIgnoreStart
return null;
// @codeCoverageIgnoreEnd
}
protected function doFix($json)
{
list($index, $char) = [-1, ''];
while (isset($json[++$index])) {
list($prev, $char) = [$char, $json[$index]];
$next = isset($json[$index + 1]) ? $json[$index + 1] : '';
if (!\in_array($char, [' ', "\n", "\r"])) {
$this->stack($prev, $char, $index, $next);
}
}
return $this->fixOrFail($json);
}
protected function stack($prev, $char, $index, $next)
{
if ($this->maybeStr($prev, $char, $index)) {
return;
}
$last = $this->lastToken();
if (\in_array($last, [',', ':', '"']) && \preg_match('/\"|\d|\{|\[|t|f|n/', $char)) {
$this->popToken();
}
if (\in_array($char, [',', ':', '[', '{'])) {
$this->stack[$index] = $char;
}
$this->updatePos($char, $index);
}
protected function lastToken()
{
return \end($this->stack);
}
protected function popToken($token = null)
{
// Last one
if (null === $token) {
return \array_pop($this->stack);
}
$keys = \array_reverse(\array_keys($this->stack));
foreach ($keys as $key) {
if ($this->stack[$key] === $token) {
unset($this->stack[$key]);
break;
}
}
}
protected function maybeStr($prev, $char, $index)
{
if ($prev !== '\\' && $char === '"') {
$this->inStr = !$this->inStr;
}
if ($this->inStr && $this->lastToken() !== '"') {
$this->stack[$index] = '"';
}
return $this->inStr;
}
protected function updatePos($char, $index)
{
if ($char === '{') {
$this->objectPos = $index;
} elseif ($char === '}') {
$this->popToken('{');
$this->objectPos = -1;
} elseif ($char === '[') {
$this->arrayPos = $index;
} elseif ($char === ']') {
$this->popToken('[');
$this->arrayPos = -1;
}
}
protected function fixOrFail($json)
{
$length = \strlen($json);
$tmpJson = $this->pad($json);
if ($this->isValid($tmpJson)) {
return $tmpJson;
}
if ($this->silent) {
return $json;
}
throw new InvalidJsonException(
\sprintf('Could not fix JSON (tried padding `%s`)', \substr($tmpJson, $length), $json)
);
}
}