1 <?php

2 namespace ‪TYPO3\CMS\Core\Encoder;

3 

4 /*

5  * This file is part of the TYPO3 CMS project.

6  *

7  * It is free software; you can redistribute it and/or modify it under

8  * the terms of the GNU General Public License, either version 2

9  * of the License, or any later version.

10  *

11  * For the full copyright and license information, please read the

12  * LICENSE.txt file that was distributed with this source code.

13  *

14  * The TYPO3 project - inspiring people to share!

15  */

16 

27 class ‪JavaScriptEncoder implements ‪\TYPO3\CMS\Core\SingletonInterface

28 {

35  protected ‪$hexMatrix = [];

36 

42  protected ‪$immuneCharacters = [',', '.', '_'];

43 

49  protected ‪$charsetConversion;

50 

57  public function ‪__construct()

58  {

59  trigger_error('TYPO3\'s JavaScriptEncoder will be removed in TYPO3 v10.0, use PHPs native json_encode() or GeneralUtility::quoteJSvalue() instead.', E_USER_DEPRECATED);

60  $this->charsetConversion = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\‪TYPO3\CMS\Core\Charset\CharsetConverter::class);

61  for ($i = 0; $i < 256; $i++) {

62  if ($i >= ord('0') && $i <= ord('9') || $i >= ord('A') && $i <= ord('Z') || $i >= ord('a') && $i <= ord('z')) {

63  $this->hexMatrix[$i] = null;

64  } else {

65  $this->hexMatrix[$i] = dechex($i);

66  }

67  }

68  }

69 

76  public function ‪encode($input)

77  {

78  $stringLength = mb_strlen($input, 'utf-8');

79  $encodedString = '';

80  for ($i = 0; $i < $stringLength; $i++) {

81  $c = mb_substr($input, $i, 1, 'utf-8');

82  $encodedString .= $this->‪encodeCharacter($c);

83  }

84  return $encodedString;

85  }

86 

97  protected function ‪encodeCharacter($character)

98  {

99  if ($this->‪isImmuneCharacter($character)) {

100  return $character;

101  }

102  $ordinalValue = $this->charsetConversion->utf8CharToUnumber($character);

103  // Check for alphanumeric characters

104  $hex = $this->‪getHexForNonAlphanumeric($ordinalValue);

105  if ($hex === null) {

106  return $character;

107  }

108  // Encode up to 256 with \\xHH

109  if ($ordinalValue < 256) {

110  $pad = substr('00', strlen($hex));

111  return '\\x' . $pad . strtoupper($hex);

112  }

113  // Otherwise encode with \\uHHHH

114  $pad = substr('0000', strlen($hex));

115  return '\\u' . $pad . strtoupper($hex);

116  }

117 

124  protected function ‪isImmuneCharacter($character)

125  {

126  return in_array($character, $this->immuneCharacters, true);

127  }

128 

139  protected function ‪getHexForNonAlphanumeric($ordinalValue)

140  {

141  if ($ordinalValue <= 255) {

142  return $this->hexMatrix[$ordinalValue];

143  }

144  return dechex($ordinalValue);

145  }

146 }