public function matchesNode()

in src/Facebook/InstantArticles/Transformer/Rules/ConfigurationSelectorRule.php [73:135]
44 lines of code
14 McCabe index (conditional complexity)

    public function matchesNode($node)
    {
        // Only matches DOMElements (ignore text and comments)
        if (!Type::is($node, 'DOMElement')) {
            return false;
        }

        // Handles selector = tag
        if ($node->nodeName === $this->selector) {
            return true;
        }

        // Handles selector = .class
        if (preg_match('/^\.[a-zA-Z][a-zA-Z0-9-]*$/', $this->selector) === 1) {
            // Tries every class
            $classNames = explode(' ', $node->getAttribute('class'));
            foreach ($classNames as $className) {
                if ('.' . $className === $this->selector) {
                    return true;
                }
            }

            // No match!
            return false;
        }

        // Handles selector = tag.class
        if (preg_match('/^[a-zA-Z][a-zA-Z0-9-]*(\.[a-zA-Z][a-zA-Z0-9-]*)?$/', $this->selector) === 1) {
            // Tries every class
            $classNames = explode(' ', $node->getAttribute('class'));
            foreach ($classNames as $className) {
                if ($node->nodeName . '.' . $className === $this->selector) {
                    return true;
                }
            }

            // No match!
            return false;
        }

        // Proceed with the more expensive XPath query
        $document = $node->ownerDocument;
        $domXPath = new \DOMXPath($document);

        if (substr($this->selector, 0, 1) === '/') {
            $xpath = $this->selector;
        } else {
            $converter = new CssSelectorConverter();
            $xpath = $converter->toXPath($this->selector === null ? "" : $this->selector);
        }

        $results = $domXPath->query($xpath);

        if (false !== $results) {
            foreach ($results as $result) {
                if ($result === $node) {
                    return true;
                }
            }
        }

        return false;
    }