/**
* Build a QTI_Item from a DOMElement, the root tag of which is root assessmentItem
*
* @param DOMElement $data
* @return oat\taoQtiItem\model\qti\Item
* @throws oat\taoQtiItem\model\qti\exception\ParsingException
*/
protected function buildItem(DOMElement $data)
{
//check on the root tag.
$itemId = (string) $data->getAttribute('identifier');
common_Logger::i('Started parsing of QTI item' . (isset($itemId) ? ' ' . $itemId : ''), array('TAOITEMS'));
//create the item instance
$this->item = new Item($this->extractAttributes($data));
foreach ($this->queryXPath('namespace::*') as $node) {
$name = preg_replace('/xmlns(:)?/', '', $node->nodeName);
$this->item->addNamespace($name, $node->nodeValue);
}
$nsQti = $this->item->getNamespace('http://www.imsglobal.org/xsd/imsqti_v2p1');
$this->qtiPrefix = $nsQti ? $nsQti . ':' : '';
$styleSheetNodes = $this->queryXPath("*[name(.) = 'stylesheet']", $data);
foreach ($styleSheetNodes as $styleSheetNode) {
$styleSheet = $this->buildStylesheet($styleSheetNode);
$this->item->addStylesheet($styleSheet);
}
//extract the responses
$responseNodes = $this->queryXPath("*[name(.) = 'responseDeclaration']", $data);
foreach ($responseNodes as $responseNode) {
$response = $this->buildResponseDeclaration($responseNode);
if (!is_null($response)) {
$this->item->addResponse($response);
}
}
//extract outcome variables
$outcomes = array();
$outComeNodes = $this->queryXPath("*[name(.) = 'outcomeDeclaration']", $data);
foreach ($outComeNodes as $outComeNode) {
$outcome = $this->buildOutcomeDeclaration($outComeNode);
if (!is_null($outcome)) {
$outcomes[] = $outcome;
}
}
if (count($outcomes) > 0) {
$this->item->setOutcomes($outcomes);
}
//extract modal feedbacks
$feedbackNodes = $this->queryXPath("*[name(.) = 'modalFeedback']", $data);
foreach ($feedbackNodes as $feedbackNode) {
$modalFeedback = $this->buildFeedback($feedbackNode);
if (!is_null($modalFeedback)) {
$this->item->addModalFeedback($modalFeedback);
}
}
//extract the item structure to separate the structural/style content to the item content
$itemBodies = $this->queryXPath("*[name(.) = 'itemBody']", $data);
// array with 1 or zero bodies
if ($itemBodies === false) {
$errors = libxml_get_errors();
if (count($errors) > 0) {
$error = array_shift($errors);
$errormsg = $error->message;
} else {
$errormsg = "without errormessage";
}
throw new ParsingException('XML error(' . $errormsg . ') on itemBody read' . (isset($itemId) ? ' for item ' . $itemId : ''));
} elseif ($itemBodies->length) {
$this->parseContainerItemBody($itemBodies->item(0), $this->item->getBody());
}
//warning: extract the response processing at the latest to make oat\taoQtiItem\model\qti\response\TemplatesDriven::takeOverFrom() work
$rpNodes = $this->queryXPath("*[name(.) = 'responseProcessing']", $data);
if ($rpNodes->length === 0) {
common_Logger::i('No responseProcessing found for QTI Item, setting empty custom', array('QTI', 'TAOITEMS'));
$customrp = new Custom(array(), '<responseProcessing/>');
$this->item->setResponseProcessing($customrp);
} else {
$rpNode = $rpNodes->item(0);
//the node should be alone
$rProcessing = $this->buildResponseProcessing($rpNode, $this->item);
if (!is_null($rProcessing)) {
$this->item->setResponseProcessing($rProcessing);
}
}
return $this->item;
}