/**
* Creates a preview of the given metadata and returns it
*
* @param string $metadata The metadata to process
* @param string $format Metadata format
* @param string $source Source identifier
*
* @return array Solr record fields
*/
public function preview($metadata, $format, $source)
{
if (!$source) {
$source = "_preview";
}
/* Process data source preTransformation XSL if present
TODO: duplicates code from RecordManager, refactor? */
$settings = $this->settings[$source];
if (isset($settings['preTransformation']) && $settings['preTransformation']) {
$style = new DOMDocument();
$style->load($this->basePath . '/transformations/' . $settings['preTransformation']);
$xslt = new XSLTProcessor();
$xslt->importStylesheet($style);
$xslt->setParameter('', 'source_id', $source);
$xslt->setParameter('', 'institution', $settings['institution']);
$xslt->setParameter('', 'format', $format);
$xslt->setParameter('', 'id_prefix', isset($settings['idPrefix']) && $settings['idPrefix'] ? $settings['idPrefix'] : $source);
$doc = new DOMDocument();
$doc->loadXML($metadata);
$metadata = $xslt->transformToXml($doc);
}
$record = ['format' => $format, 'original_data' => $metadata, 'normalized_data' => $metadata, 'source_id' => $source, 'linking_id' => '', 'oai_id' => '_preview', '_id' => '_preview', 'created' => new MongoDate(), 'date' => new MongoDate()];
// Normalize the record
$this->normalizationXSLT = isset($settings['normalization']) && $settings['normalization'] ?: null;
if (isset($settings['normalization'])) {
$basePath = substr(__FILE__, 0, strrpos(__FILE__, DIRECTORY_SEPARATOR));
$basePath = substr($basePath, 0, strrpos($basePath, DIRECTORY_SEPARATOR));
$params = ['source_id' => $source, 'institution' => 'Preview', 'format' => $format, 'id_prefix' => ''];
$normalizationXSLT = new XslTransformation($basePath . '/transformations', $settings['normalization'], $params);
$record['normalized_data'] = $normalizationXSLT->transform($metadata, ['oai_id' => $record['oai_id']]);
}
$metadataRecord = RecordFactory::createRecord($record['format'], $record['normalized_data'], $record['oai_id'], $record['source_id']);
$metadataRecord->normalize();
$record['normalized_data'] = $metadataRecord->serialize();
$record['_id'] = $source . '.' . $metadataRecord->getID();
return $this->createSolrArray($record, $componentParts);
}
/**
* Load XML into a DOM
*
* @param string $xml XML string
*
* @return DOMDocument
*/
protected function loadXML($xml)
{
$doc = new DOMDocument();
if (!$doc->loadXML($xml, LIBXML_PARSEHUGE)) {
return false;
}
if ($this->transformation) {
return $this->transformation->transformToDoc($doc);
}
return $doc;
}
