/**
* Return fields to be indexed in Solr (an alternative to an XSL transformation)
*
* @return string[]
*/
public function toSolrArray()
{
$data = parent::toSolrArray();
if (isset($data['publishDate'])) {
$data['main_date_str'] = MetadataUtils::extractYear($data['publishDate']);
$data['main_date'] = $this->validateDate($this->getPublicationYear() . '-01-01T00:00:00Z');
}
if ($range = $this->getPublicationDateRange()) {
$data['search_sdaterange_mv'][] = $data['publication_sdaterange'] = metadataUtils::dateRangeToNumeric($range);
$data['search_daterange_mv'][] = $data['publication_daterange'] = metadataUtils::dateRangeToStr($range);
}
// language, take only first
$languages = array_filter(explode(' ', (string) $this->doc->language), function ($value) {
return preg_match('/^[a-z]{2,3}$/', $value) && $value != 'zxx' && $value != 'und';
});
$data['language'] = array_shift($languages);
$data['source_str_mv'] = $this->source;
$data['datasource_str_mv'] = $this->source;
return $data;
}
