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<?php |
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namespace Crossjoin\Json; |
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use Crossjoin\Json\Exception\ConversionFailedException; |
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use Crossjoin\Json\Exception\ExtensionRequiredException; |
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use Crossjoin\Json\Exception\InvalidArgumentException; |
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use Crossjoin\Json\Exception\NativeJsonErrorException; |
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/** |
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* Class Converter |
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* |
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* @package Crossjoin\Json |
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* @author Christoph Ziegenberg <[email protected]> |
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*/ |
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abstract class Converter |
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{ |
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const UTF8 = 'UTF-8'; |
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const UTF16BE = 'UTF-16BE'; |
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const UTF16LE = 'UTF-16LE'; |
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const UTF32BE = 'UTF-32BE'; |
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const UTF32LE = 'UTF-32LE'; |
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/** |
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* @param string $string |
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* @param string $fromEncoding |
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* @param string $toEncoding |
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* |
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* @return string |
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* @throws \Crossjoin\Json\Exception\InvalidArgumentException |
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* @throws \Crossjoin\Json\Exception\ConversionFailedException |
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* @throws \Crossjoin\Json\Exception\ExtensionRequiredException |
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*/ |
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public function convertEncoding($string, $fromEncoding, $toEncoding) |
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{ |
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// Check arguments |
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InvalidArgumentException::validateArgument(InvalidArgumentException::TYPE_STRING, 'json', $string, 1478195990); |
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InvalidArgumentException::validateArgument(InvalidArgumentException::TYPE_STRING, 'fromEncoding', $fromEncoding, 1478195991); |
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InvalidArgumentException::validateArgument(InvalidArgumentException::TYPE_STRING, 'toEncoding', $toEncoding, 1478195992); |
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if ($fromEncoding === $toEncoding) { |
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return $string; |
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} |
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return $this->tryConvertEncoding($string, $fromEncoding, $toEncoding); |
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} |
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/** |
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* @param $string |
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* @param $fromEncoding |
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* @param $toEncoding |
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* |
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* @return string |
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* @throws \Crossjoin\Json\Exception\ExtensionRequiredException |
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* @throws \Crossjoin\Json\Exception\ConversionFailedException |
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*/ |
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private function tryConvertEncoding($string, $fromEncoding, $toEncoding) |
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{ |
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// Try different conversion functions, ordered by speed |
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if (($converted = $this->convertWithIconv($string, $fromEncoding, $toEncoding)) !== null) { |
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return $converted; |
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} elseif (($converted = $this->convertWithUConverter($string, $fromEncoding, $toEncoding)) !== null) { |
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return $converted; |
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} elseif (($converted = $this->convertWithMultiByteString($string, $fromEncoding, $toEncoding)) !== null) { |
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return $converted; |
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} |
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// No available method found |
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throw new ExtensionRequiredException( |
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"The 'iconv', 'intl' or the 'mbstring' extension is required to convert the JSON encoding.", |
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1478095252 |
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); |
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} |
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/** |
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* Removes the byte order mark (BOM) from the JSON text. This is not allowed in JSON, |
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* but may be ignored when parsing it. |
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* |
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* @param string $string |
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* |
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* @return string |
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* @throws \Crossjoin\Json\Exception\InvalidArgumentException |
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*/ |
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public function removeByteOrderMark($string) |
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{ |
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// Check arguments |
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InvalidArgumentException::validateArgument(InvalidArgumentException::TYPE_STRING, 'string', $string, 1478195910); |
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return (string)preg_replace( |
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'/^(?:' . |
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'\xEF\xBB\xBF|' . // UTF-8 BOM |
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'\x00\x00\xFE\xFF|' . // UTF-32BE BOM |
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'\xFF\xFE\x00\x00|' . // UTF-32LE BOM (before UTF-16LE check!) |
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'\xFE\xFF|' . // UTF-16BE BOM |
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'\xFF\xFE' . // UTF-16LE BOM |
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')/', |
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'', |
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$string |
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); |
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} |
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/** |
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* @return NativeJsonErrorException |
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*/ |
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protected function getNativeJsonErrorException() |
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{ |
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// @codeCoverageIgnoreStart |
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if (function_exists('\json_last_error_msg')) { |
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return new NativeJsonErrorException(\json_last_error_msg(), \json_last_error()); |
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} else { |
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return new NativeJsonErrorException('An error occurred while encoding/decoding JSON.', \json_last_error()); |
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} |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* @param $string |
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* @param $fromEncoding |
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* @param $toEncoding |
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* |
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* @return string|null |
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* @throws \Crossjoin\Json\Exception\ConversionFailedException |
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*/ |
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private function convertWithIconv($string, $fromEncoding, $toEncoding) |
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{ |
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// @codeCoverageIgnoreStart |
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if (function_exists('iconv')) { |
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$string = iconv($fromEncoding, $toEncoding . '//IGNORE', $string); |
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if ($string === false) { |
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throw new ConversionFailedException('Error while converting the encoding.', 1478193725); |
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} |
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return $string; |
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} |
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return null; |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* @param $string |
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* @param $fromEncoding |
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* @param $toEncoding |
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* |
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* @return string|null |
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*/ |
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private function convertWithUConverter($string, $fromEncoding, $toEncoding) |
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{ |
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// @codeCoverageIgnoreStart |
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if (class_exists('\\UConverter')) { |
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/** @noinspection PhpUndefinedClassInspection */ |
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$uConverter = new \UConverter($toEncoding, $fromEncoding); |
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/** @noinspection PhpUndefinedMethodInspection */ |
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return $uConverter->convert($string); |
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} |
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return null; |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* @param $string |
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* @param $fromEncoding |
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* @param $toEncoding |
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* |
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* @return string|null |
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*/ |
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private function convertWithMultiByteString($string, $fromEncoding, $toEncoding) |
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{ |
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// @codeCoverageIgnoreStart |
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if (function_exists('mb_convert_encoding')) { |
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return mb_convert_encoding($string, $toEncoding, $fromEncoding); |
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} |
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return null; |
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// @codeCoverageIgnoreEnd |
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} |
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} |
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crossjoin /
Json
