<?php

namespace Composer\Json;

use Composer\Pcre\Preg;

/**
 * Formats json strings used for php < 5.4 because the json_encode doesn't
 * supports the flags JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE
 * in these versions
 *
 * @author Konstantin Kudryashiv <ever.zet@gmail.com>
 * @author Jordi Boggiano <j.boggiano@seld.be>
 *
 * @deprecated Use json_encode or JsonFile::encode() with modern JSON_* flags to configure formatting - this class will be removed in 3.0
 */
class JsonFormatter
{
	/**
	 * This code is based on the function found at:
	 *  http://recursive-design.com/blog/2008/03/11/format-json-with-php/
	 *
	 * Originally licensed under MIT by Dave Perrett <mail@recursive-design.com>
	 *
	 * @param  bool   $unescapeUnicode Un escape unicode
	 * @param  bool   $unescapeSlashes Un escape slashes
	 */
	public static function format(string $json, bool $unescapeUnicode, bool $unescapeSlashes): string
	{
		$result = '';
		$pos = 0;
		$strLen = strlen($json);
		$indentStr = '    ';
		$newLine = "\n";
		$outOfQuotes = true;
		$buffer = '';
		$noescape = true;

		for ($i = 0; $i < $strLen; $i++) {
		    // Grab the next character in the string
		    $char = substr($json, $i, 1);

		    // Are we inside a quoted string?
		    if ('"' === $char && $noescape) {
		        $outOfQuotes = !$outOfQuotes;
		    }

		    if (!$outOfQuotes) {
		        $buffer .= $char;
		        $noescape = '\\' === $char ? !$noescape : true;
		        continue;
		    }
		    if ('' !== $buffer) {
		        if ($unescapeSlashes) {
		            $buffer = str_replace('\\/', '/', $buffer);
		        }

		        if ($unescapeUnicode && function_exists('mb_convert_encoding')) {
		            // https://stackoverflow.com/questions/2934563/how-to-decode-unicode-escape-sequences-like-u00ed-to-proper-utf-8-encoded-cha
		            $buffer = Preg::replaceCallback('/(\\\\+)u([0-9a-f]{4})/i', static function ($match) {
		                assert(is_string($match[1]));
		                assert(is_string($match[2]));
		                $l = strlen($match[1]);

		                if ($l % 2) {
		                    $code = hexdec($match[2]);
		                    // 0xD800..0xDFFF denotes UTF-16 surrogate pair which won't be unescaped
		                    // see https://github.com/composer/composer/issues/7510
		                    if (0xD800 <= $code && 0xDFFF >= $code) {
		                        return $match[0];
		                    }

		                    return str_repeat('\\', $l - 1) . mb_convert_encoding(
		                        pack('H*', $match[2]),
		                        'UTF-8',
		                        'UCS-2BE'
		                    );
		                }

		                return $match[0];
		            }, $buffer);
		        }

		        $result .= $buffer.$char;
		        $buffer = '';
		        continue;
		    }

		    if (':' === $char) {
		        // Add a space after the : character
		        $char .= ' ';
		    } elseif ('}' === $char || ']' === $char) {
		        $pos--;
		        $prevChar = substr($json, $i - 1, 1);

		        if ('{' !== $prevChar && '[' !== $prevChar) {
		            // If this character is the end of an element,
		            // output a new line and indent the next line
		            $result .= $newLine;
		            $result .= str_repeat($indentStr, $pos);
		        } else {
		            // Collapse empty {} and []
		            $result = rtrim($result);
		        }
		    }

		    $result .= $char;

		    // If the last character was the beginning of an element,
		    // output a new line and indent the next line
		    if (',' === $char || '{' === $char || '[' === $char) {
		        $result .= $newLine;

		        if ('{' === $char || '[' === $char) {
		            $pos++;
		        }

		        $result .= str_repeat($indentStr, $pos);
		    }
		}

		return $result;
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----Nzc2ODg4MzUxNjU1OTQ3MiA1MDQzOTcxNTE3MDY5MjM3IDQ0NTU4NjIzNTkwOTE3MDI=