edde-framework/edde-framework

<?php
    declare(strict_types=1);

    namespace Edde\Common\Xml;

    use Edde\Api\Node\INode;

    class XmlExport extends AbstractXmlExport {
        /**
         * @inheritdoc
         */
        public function node(\Iterator $iterator) {
            $stack = new \SplStack();
            $level = -1;
            /** @var $node INode */
            foreach ($iterator as $node) {
                $value = null;
                if ($node->getLevel() < $level) {
                    echo $stack->pop();
                }
                $indentation = str_repeat("\t", $node->getLevel());
                $metaList = $node->getMetaList();
                $isClosed = (($value = $node->getValue()) === null) && ($node->isLeaf() || $metaList->get('pair', false));
                $close = '</' . $node->getName() . ">\n";
                if ($isClosed === false && ($node->isLeaf() === false || $value === null)) {
                    $stack->push($indentation . $close);
                }
                $content = [];
                $content[] = $indentation . '<' . $node->getName();
                foreach ($node->getAttributeList() as $name => $list) {
                    $content[] = ' ' . $name . '="' . htmlspecialchars((string)$list, ENT_XML1 | ENT_COMPAT, 'UTF-8') . '"';
                }
                if ($isClosed) {
                    $content[] = '/';
                }
                $content[] = '>' . (($value && $node->isLeaf()) ? '' : "\n");
                echo implode('', $content);
                if ($value && $node->isLeaf()) {
                    echo $value;
                }
                if ($isClosed === false && $value && $node->isLeaf()) {
                    echo $close;
                }
                $level = $node->getLevel();
            }
            while ($stack->isEmpty() === false) {
                echo $stack->pop();
            }
        }
    }