Chris@2: <?php declare(strict_types = 1);
Chris@2: namespace TheSeer\Tokenizer;
Chris@2: 
Chris@2: use DOMDocument;
Chris@2: 
Chris@2: class XMLSerializer {
Chris@2: 
Chris@2:     /**
Chris@2:      * @var \XMLWriter
Chris@2:      */
Chris@2:     private $writer;
Chris@2: 
Chris@2:     /**
Chris@2:      * @var Token
Chris@2:      */
Chris@2:     private $previousToken;
Chris@2: 
Chris@2:     /**
Chris@2:      * @var NamespaceUri
Chris@2:      */
Chris@2:     private $xmlns;
Chris@2: 
Chris@2:     /**
Chris@2:      * XMLSerializer constructor.
Chris@2:      *
Chris@2:      * @param NamespaceUri $xmlns
Chris@2:      */
Chris@2:     public function __construct(NamespaceUri $xmlns = null) {
Chris@2:         if ($xmlns === null) {
Chris@2:             $xmlns = new NamespaceUri('https://github.com/theseer/tokenizer');
Chris@2:         }
Chris@2:         $this->xmlns = $xmlns;
Chris@2:     }
Chris@2: 
Chris@2:     /**
Chris@2:      * @param TokenCollection $tokens
Chris@2:      *
Chris@2:      * @return DOMDocument
Chris@2:      */
Chris@2:     public function toDom(TokenCollection $tokens): DOMDocument {
Chris@2:         $dom = new DOMDocument();
Chris@2:         $dom->preserveWhiteSpace = false;
Chris@2:         $dom->loadXML($this->toXML($tokens));
Chris@2: 
Chris@2:         return $dom;
Chris@2:     }
Chris@2: 
Chris@2:     /**
Chris@2:      * @param TokenCollection $tokens
Chris@2:      *
Chris@2:      * @return string
Chris@2:      */
Chris@2:     public function toXML(TokenCollection $tokens): string {
Chris@2:         $this->writer = new \XMLWriter();
Chris@2:         $this->writer->openMemory();
Chris@2:         $this->writer->setIndent(true);
Chris@2:         $this->writer->startDocument();
Chris@2:         $this->writer->startElement('source');
Chris@2:         $this->writer->writeAttribute('xmlns', $this->xmlns->asString());
Chris@2:         $this->writer->startElement('line');
Chris@2:         $this->writer->writeAttribute('no', '1');
Chris@2: 
Chris@2:         $this->previousToken = $tokens[0];
Chris@2:         foreach ($tokens as $token) {
Chris@2:             $this->addToken($token);
Chris@2:         }
Chris@2: 
Chris@2:         $this->writer->endElement();
Chris@2:         $this->writer->endElement();
Chris@2:         $this->writer->endDocument();
Chris@2: 
Chris@2:         return $this->writer->outputMemory();
Chris@2:     }
Chris@2: 
Chris@2:     /**
Chris@2:      * @param Token $token
Chris@2:      */
Chris@2:     private function addToken(Token $token) {
Chris@2:         if ($this->previousToken->getLine() < $token->getLine()) {
Chris@2:             $this->writer->endElement();
Chris@2: 
Chris@2:             $this->writer->startElement('line');
Chris@2:             $this->writer->writeAttribute('no', (string)$token->getLine());
Chris@2:             $this->previousToken = $token;
Chris@2:         }
Chris@2: 
Chris@2:         if ($token->getValue() !== '') {
Chris@2:             $this->writer->startElement('token');
Chris@2:             $this->writer->writeAttribute('name', $token->getName());
Chris@2:             $this->writer->writeRaw(htmlspecialchars($token->getValue(), ENT_NOQUOTES | ENT_DISALLOWED | ENT_XML1));
Chris@2:             $this->writer->endElement();
Chris@2:         }
Chris@2:     }
Chris@2: }