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<?php |
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/** |
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* Author: Nil Portugués Calderó <[email protected]> |
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* Date: 8/29/15 |
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* Time: 12:46 PM. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace NilPortugues\Serializer\Strategy; |
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use NilPortugues\Serializer\Serializer; |
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use SimpleXMLElement; |
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class XmlStrategy implements StrategyInterface |
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{ |
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/** |
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* @var array |
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*/ |
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private $replacements = [ |
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Serializer::CLASS_IDENTIFIER_KEY => 'np_serializer_type', |
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Serializer::SCALAR_TYPE => 'np_serializer_scalar', |
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Serializer::SCALAR_VALUE => 'np_serializer_value', |
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Serializer::MAP_TYPE => 'np_serializer_map', |
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]; |
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/** |
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* @param mixed $value |
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* |
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* @return string |
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*/ |
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public function serialize($value) |
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{ |
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$value = self::replaceKeys($this->replacements, $value); |
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$xml = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8"?><data></data>'); |
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$this->arrayToXml($value, $xml); |
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return $xml->asXML(); |
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} |
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/** |
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* @param array $replacements |
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* @param array $input |
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* |
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* @return array |
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*/ |
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private static function replaceKeys(array &$replacements, array $input) |
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{ |
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$return = []; |
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foreach ($input as $key => $value) { |
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$key = \str_replace(\array_keys($replacements), \array_values($replacements), $key); |
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if (\is_array($value)) { |
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$value = self::replaceKeys($replacements, $value); |
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} |
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$return[$key] = $value; |
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} |
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return $return; |
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} |
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/** |
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* Converts an array to XML using SimpleXMLElement. |
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* |
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* @param array $data |
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* @param SimpleXMLElement $xmlData |
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*/ |
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private function arrayToXml(array &$data, SimpleXMLElement $xmlData) |
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{ |
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foreach ($data as $key => $value) { |
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if (\is_array($value)) { |
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if (\is_numeric($key)) { |
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$key = 'np_serializer_element_'.gettype($key).'_'.$key; |
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} |
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$subnode = $xmlData->addChild($key); |
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$this->arrayToXml($value, $subnode); |
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} else { |
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$xmlData->addChild("$key", "$value"); |
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} |
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} |
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} |
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/** |
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* @param $value |
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* |
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* @return array |
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*/ |
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public function unserialize($value) |
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{ |
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$array = (array) \simplexml_load_string($value); |
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self::castToArray($array); |
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self::recoverArrayNumericKeyValues($array); |
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$replacements = \array_flip($this->replacements); |
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$array = self::replaceKeys($replacements, $array); |
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return $array; |
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} |
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/** |
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* @param array $array |
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*/ |
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private static function castToArray(array &$array) |
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{ |
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foreach ($array as &$value) { |
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if ($value instanceof SimpleXMLElement) { |
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$value = (array) $value; |
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} |
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if (\is_array($value)) { |
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self::castToArray($value); |
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} |
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} |
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} |
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/** |
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* @param array $array |
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*/ |
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private static function recoverArrayNumericKeyValues(array &$array) |
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{ |
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$newArray = []; |
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foreach ($array as $key => &$value) { |
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if (false !== \strpos($key, 'np_serializer_element_')) { |
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$key = self::getNumericKeyValue($key); |
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} |
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$newArray[$key] = $value; |
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if (\is_array($newArray[$key])) { |
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self::recoverArrayNumericKeyValues($newArray[$key]); |
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} |
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} |
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$array = $newArray; |
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} |
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/** |
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* @param $key |
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* |
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* @return float|int |
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*/ |
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private static function getNumericKeyValue($key) |
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{ |
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$newKey = \str_replace('np_serializer_element_', '', $key); |
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list($type, $index) = \explode('_', $newKey); |
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if ('integer' === $type) { |
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$index = (int) $index; |
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} |
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return $index; |
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} |
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} |
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