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<?php
declare (strict_types=1);
/**
* Copyright (c) 2018-2021 Andreas Möller
*
* For the full copyright and license information, please view
* the LICENSE.md file that was distributed with this source code.
*
* @see https://github.com/ergebnis/json-printer
*/
namespace RectorPrefix20211231\Ergebnis\Json\Printer;
final class Printer implements \RectorPrefix20211231\Ergebnis\Json\Printer\PrinterInterface
{
/**
* This code is adopted from composer/composer (originally licensed under MIT by Nils Adermann <naderman@naderman.de>
* and Jordi Boggiano <j.boggiano@seld.be>), who adopted it from a blog post by Dave Perrett (originally licensed
* under MIT by Dave Perrett <mail@recursive-design.com>).
*
* The primary objective of the adoption is
*
* - turn static method into an instance method
* - allow to specify indent
* - allow to specify new-line character sequence
*
* If you observe closely, the options for un-escaping unicode characters and slashes have been removed. Since this
* package requires PHP 7, there is no need to implement this in user-land code.
*
* @see https://github.com/composer/composer/blob/1.6.0/src/Composer/Json/JsonFormatter.php#L25-L126
* @see https://www.daveperrett.com/articles/2008/03/11/format-json-with-php/
* @see http://php.net/manual/en/function.json-encode.php
* @see http://php.net/manual/en/json.constants.php
*
* @throws \InvalidArgumentException
*/
public function print(string $json, string $indent = ' ', string $newLine = \PHP_EOL) : string
{
if (null === \json_decode($json) && \JSON_ERROR_NONE !== \json_last_error()) {
throw new \InvalidArgumentException(\sprintf('"%s" is not valid JSON.', $json));
}
if (1 !== \preg_match('/^( +|\\t+)$/', $indent)) {
throw new \InvalidArgumentException(\sprintf('"%s" is not a valid indent.', $indent));
}
if (1 !== \preg_match('/^(?>\\r\\n|\\n|\\r)$/', $newLine)) {
throw new \InvalidArgumentException(\sprintf('"%s" is not a valid new-line character sequence.', $newLine));
}
$printed = '';
$indentLevel = 0;
$length = \mb_strlen($json);
$withinStringLiteral = \false;
$stringLiteral = '';
$noEscape = \true;
for ($i = 0; $i < $length; ++$i) {
/**
* Grab the next character in the string.
*/
$character = \mb_substr($json, $i, 1);
/**
* Are we inside a quoted string literal?
*/
if ('"' === $character && $noEscape) {
$withinStringLiteral = !$withinStringLiteral;
}
/**
* Collect characters if we are inside a quoted string literal.
*/
if ($withinStringLiteral) {
$stringLiteral .= $character;
$noEscape = '\\' === $character ? !$noEscape : \true;
continue;
}
/**
* Process string literal if we are about to leave it.
*/
if ('' !== $stringLiteral) {
$printed .= $stringLiteral . $character;
$stringLiteral = '';
continue;
}
/**
* Ignore whitespace outside of string literal.
*/
if ('' === \trim($character)) {
continue;
}
/**
* Ensure space after ":" character.
*/
if (':' === $character) {
$printed .= ': ';
continue;
}
/**
* Output a new line after "," character and and indent the next line.
*/
if (',' === $character) {
$printed .= $character . $newLine . \str_repeat($indent, $indentLevel);
continue;
}
/**
* Output a new line after "{" and "[" and indent the next line.
*/
if ('{' === $character || '[' === $character) {
++$indentLevel;
$printed .= $character . $newLine . \str_repeat($indent, $indentLevel);
continue;
}
/**
* Output a new line after "}" and "]" and indent the next line.
*/
if ('}' === $character || ']' === $character) {
--$indentLevel;
$trimmed = \rtrim($printed);
$previousNonWhitespaceCharacter = \mb_substr($trimmed, -1);
/**
* Collapse empty {} and [].
*/
if ('{' === $previousNonWhitespaceCharacter || '[' === $previousNonWhitespaceCharacter) {
$printed = $trimmed . $character;
continue;
}
$printed .= $newLine . \str_repeat($indent, $indentLevel);
}
$printed .= $character;
}
return $printed;
}
}
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