78 lines
2.0 KiB
PHP
78 lines
2.0 KiB
PHP
<?php
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namespace YusufKandemir\MicrodataParser;
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class MicrodataParser
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{
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protected $topLevelItems;
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public function __construct(\DOMDocument $dom)
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{
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$dom->registerNodeClass(\DOMElement::class, MicrodataDOMElement::class);
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$xpath = new \DOMXPath($dom);
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$this->topLevelItems = $xpath->query('//*[@itemscope and not(@itemprop)]');
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}
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public function extractMicrodata()
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{
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$result = new \stdClass;
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$result->items = [];
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foreach ($this->topLevelItems as $topLevelItem) {
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$result->items[] = $this->getObject($topLevelItem);
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}
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return $result;
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}
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protected function getObject(\DOMElement $item, $memory = [])
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{
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$result = new \stdClass;
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$memory[] = $item;
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$itemtype = $item->getAttribute('itemtype');
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$result->type = $itemtype ? preg_split('/\s+/', $itemtype) : [];
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// @todo Check if types are valid absolute urls
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if ($itemId = $item->getAttribute('itemid')) {
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$result->id = $itemId;
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}
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// @todo Check if item ids are valid absolute urls or like isbn:xxx
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$properties = new \stdClass;
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foreach ($item->getProperties() as $element) {
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$value = $element->getPropertyValue();
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if ($this->isItem($value)) {
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foreach ($memory as $memory_item) {
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if ($element->isSameNode($memory_item)) {
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$value = 'ERROR';
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break;
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}
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}
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if ($value != 'ERROR') {
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$value = $this->getObject($value, $memory);
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}
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}
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foreach ($element->getPropertyNames() as $name) {
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$properties->{$name}[] = $value;
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}
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}
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$result->properties = $properties;
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return $result;
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}
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protected function isItem($element)
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{
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return $element instanceof \DOMElement && $element->hasAttribute('itemscope');
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}
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}
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