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<?php |
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namespace Behatch\Xml; |
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class Dom |
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{ |
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private $dom; |
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public function __construct($content) |
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{ |
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$this->dom = new \DomDocument(); |
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$this->dom->strictErrorChecking = false; |
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$this->dom->validateOnParse = false; |
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$this->dom->preserveWhiteSpace = true; |
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$this->dom->loadXML($content, LIBXML_PARSEHUGE); |
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$this->throwError(); |
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} |
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public function __toString() |
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{ |
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$this->dom->formatOutput = true; |
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return $this->dom->saveXML(); |
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} |
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public function validate() |
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{ |
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$this->dom->validate(); |
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$this->throwError(); |
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} |
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public function validateXsd($xsd) |
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{ |
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$this->dom->schemaValidateSource($xsd); |
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$this->throwError(); |
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} |
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public function validateNg($ng) |
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{ |
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try { |
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$this->dom->relaxNGValidateSource($ng); |
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$this->throwError(); |
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} |
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catch(\DOMException $e) { |
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throw new \RuntimeException($e->getMessage()); |
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} |
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} |
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public function xpath($element) |
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{ |
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$xpath = new \DOMXpath($this->dom); |
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$this->registerNamespace($xpath); |
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$element = $this->fixNamespace($element); |
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$elements = $xpath->query($element); |
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return ($elements === false) ? new \DOMNodeList() : $elements; |
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} |
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private function registerNamespace(\DOMXpath $xpath) |
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{ |
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$namespaces = $this->getNamespaces(); |
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foreach ($namespaces as $prefix => $namespace) { |
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if (empty($prefix) && $this->hasDefaultNamespace()) { |
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$prefix = 'rootns'; |
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} |
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$xpath->registerNamespace($prefix, $namespace); |
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} |
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} |
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/** |
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* "fix" queries to the default namespace if any namespaces are defined |
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*/ |
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private function fixNamespace($element) |
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{ |
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$namespaces = $this->getNamespaces(); |
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if (!empty($namespaces) && $this->hasDefaultNamespace()) { |
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for ($i = 0; $i < 2; ++$i) { |
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$element = preg_replace('/\/(\w+)(\[[^]]+\])?\//', '/rootns:$1$2/', $element); |
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} |
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$element = preg_replace('/\/(\w+)(\[[^]]+\])?$/', '/rootns:$1$2', $element); |
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} |
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return $element; |
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} |
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private function hasDefaultNamespace() |
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{ |
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$defaultNamespaceUri = $this->dom->lookupNamespaceURI(null); |
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$defaultNamespacePrefix = $defaultNamespaceUri ? $this->dom->lookupPrefix($defaultNamespaceUri) : null; |
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return empty($defaultNamespacePrefix) && !empty($defaultNamespaceUri); |
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} |
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public function getNamespaces() |
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{ |
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$xml = simplexml_import_dom($this->dom); |
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return $xml->getNamespaces(true); |
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} |
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private function throwError() |
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{ |
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$error = libxml_get_last_error(); |
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if (!empty($error)) { |
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// https://bugs.php.net/bug.php?id=46465 |
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if ($error->message != 'Validation failed: no DTD found !') { |
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throw new \DomException($error->message . ' at line ' . $error->line); |
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} |
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} |
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} |
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} |
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