/**
* Check if we need to generate or not concept identifiers (notation and uri).
* Validates any existing identifiers.
* @param DOMNode $Description
* @param DOMDocument $doc
* @return boolean If an uri must be autogenerated
*/
protected function checkConceptIdentifiers(DOMNode $Description, DOMDocument $doc)
{
// We return if an uri must be autogenerated
$autoGenerateUri = false;
$autoGenerateIdentifiers = filter_var($this->getRequest()->getParam('autoGenerateIdentifiers', false), FILTER_VALIDATE_BOOLEAN);
$xpath = new DOMXPath($doc);
$notationNodes = $xpath->query('skos:notation', $Description);
$uri = $Description->getAttributeNS(OpenSKOS_Rdf_Parser::$namespaces['rdf'], 'about');
if ($autoGenerateIdentifiers) {
if ($uri || $notationNodes->length > 0) {
throw new Zend_Controller_Action_Exception('Parameter autoGenerateIdentifiers is set to true, but the xml already contains notation (skos:notation) and/or uri (rdf:about).', 400);
}
$autoGenerateUri = true;
} else {
// Is uri missing
if (!$uri) {
throw new Zend_Controller_Action_Exception('Uri (rdf:about) is missing from the xml. You may consider using autoGenerateIdentifiers.', 400);
}
// Is notation missing
if ($notationNodes->length == 0) {
throw new Zend_Controller_Action_Exception('Notation (skos:notation) is missing from the xml. You may consider using autoGenerateIdentifiers.', 400);
}
// Is uri based on notation
if (!OpenSKOS_Db_Table_Notations::isContainedInUri($uri, $notationNodes->item(0)->nodeValue)) {
throw new Zend_Controller_Action_Exception('The concept uri (rdf:about) must be based on notation (must contain the notation)', 400);
}
$autoGenerateUri = false;
}
return $autoGenerateUri;
}
