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<?php |
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namespace Thunder\Shortcode\Serializer; |
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use Thunder\Shortcode\Shortcode\Shortcode; |
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use Thunder\Shortcode\Shortcode\ShortcodeInterface; |
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/** |
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* @author Tomasz Kowalczyk <[email protected]> |
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*/ |
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final class XmlSerializer implements SerializerInterface |
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{ |
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/** |
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* <shortcode name="NAME"> |
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* <bbCode>BBCODE</bbCode> |
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* <parameters> |
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* <parameter name="KEY">VALUE</parameter> |
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* <parameter name="KEY">VALUE</parameter> |
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* </parameters> |
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* <content>CONTENT></content> |
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* </shortcode> |
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* |
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* @param ShortcodeInterface $shortcode |
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* |
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* @return string |
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*/ |
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public function serialize(ShortcodeInterface $shortcode) |
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{ |
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$doc = new \DOMDocument('1.0', 'UTF-8'); |
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$doc->preserveWhiteSpace = false; |
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$doc->formatOutput = true; |
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$code = $doc->createElement('shortcode'); |
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$code->setAttribute('name', $shortcode->getName()); |
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$xml = $doc->appendChild($code); |
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$xml->appendChild($this->createCDataNode($doc, 'bbCode', $shortcode->getBbCode())); |
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$parameters = $xml->appendChild($doc->createElement('parameters')); |
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foreach($shortcode->getParameters() as $key => $value) { |
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$parameter = $doc->createElement('parameter'); |
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$parameter->setAttribute('name', $key); |
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if(null !== $value) { |
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$parameter->appendChild($doc->createCDATASection($value)); |
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} |
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$parameters->appendChild($parameter); |
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} |
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$xml->appendChild($this->createCDataNode($doc, 'content', $shortcode->getContent())); |
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return $doc->saveXML(); |
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} |
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/** |
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* @param \DOMDocument $doc |
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* @param string $name |
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* @param string|null $content |
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* |
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* @return \DOMElement |
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*/ |
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private function createCDataNode(\DOMDocument $doc, $name, $content) |
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{ |
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$node = $doc->createElement($name); |
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if(null !== $content) { |
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$node->appendChild($doc->createCDATASection($content)); |
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} |
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return $node; |
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} |
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/** |
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* @param string $text |
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* |
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* @return Shortcode |
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*/ |
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public function unserialize($text) |
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{ |
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$xml = new \DOMDocument(); |
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$internalErrors = libxml_use_internal_errors(true); |
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if(!$text || !$xml->loadXML($text)) { |
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libxml_use_internal_errors($internalErrors); |
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throw new \InvalidArgumentException('Failed to parse provided XML!'); |
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} |
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libxml_use_internal_errors($internalErrors); |
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$xpath = new \DOMXPath($xml); |
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$shortcode = $xpath->query('/shortcode'); |
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if($shortcode->length !== 1) { |
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throw new \InvalidArgumentException('Invalid shortcode XML!'); |
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} |
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$name = $this->getAttribute($shortcode->item(0), 'name'); |
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$bbCode = $this->getValue($xpath->query('/shortcode/bbCode')); |
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$content = $this->getValue($xpath->query('/shortcode/content')); |
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$parameters = array(); |
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$elements = $xpath->query('/shortcode/parameters/parameter'); |
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for($i = 0; $i < $elements->length; $i++) { |
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$node = $elements->item($i); |
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$parameters[$this->getAttribute($node, 'name')] = $node->hasChildNodes() ? $node->nodeValue : null; |
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} |
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return new Shortcode($name, $parameters, $content, $bbCode); |
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} |
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/** |
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* @param \DOMNodeList $node |
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* |
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* @return string|null |
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*/ |
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private function getValue(\DOMNodeList $node) |
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{ |
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return $node->length === 1 && $node->item(0)->hasChildNodes() |
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? $node->item(0)->nodeValue |
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: null; |
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} |
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/** |
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* @param \DOMNode $node |
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* @param string $name |
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* @psalm-suppress UnusedParam |
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* |
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* @return string |
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*/ |
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private function getAttribute(\DOMNode $node, $name) |
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{ |
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/** |
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* @var \DOMNode $attribute |
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* @psalm-suppress NullReference |
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*/ |
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$attribute = $node->attributes->getNamedItem($name); |
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/** @psalm-suppress DocblockTypeContradiction */ |
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if(!$attribute || !$attribute->nodeValue) { |
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throw new \InvalidArgumentException('Invalid shortcode XML!'); |
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} |
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return $attribute->nodeValue; |
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} |
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} |
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thunderer /
Shortcode
