/**
* Represent the current search results as a feed.
*
* @param \VuFind\Search\Base\Results $results Search results to convert to
* feed
* @param string $currentPath Base path to display in feed
* (leave null to load dynamically using currentpath view helper)
*
* @return Feed
*/
public function __invoke($results, $currentPath = null)
{
$this->registerExtension();
// Determine base URL if not already provided:
if (is_null($currentPath)) {
$currentPath = $this->getView()->plugin('currentpath')->__invoke();
}
$serverUrl = $this->getView()->plugin('serverurl');
$baseUrl = $serverUrl($currentPath);
// Create the parent feed
$feed = new Feed();
$feed->setTitle($this->translate('Results for') . ' ' . $results->getParams()->getDisplayQuery());
$feed->setLink($baseUrl . $results->getUrlQuery()->setViewParam(null, false));
$feed->setFeedLink($baseUrl . $results->getUrlQuery()->getParams(false), $results->getParams()->getView());
$feed->setDescription($this->translate('Showing') . ' ' . $results->getStartRecord() . '-' . $results->getEndRecord() . ' ' . $this->translate('of') . ' ' . $results->getResultTotal());
$params = $results->getParams();
// add atom links for easier paging
$feed->addOpensearchLink($baseUrl . $results->getUrlQuery()->setPage(1, false), 'first', $params->getView());
if ($params->getPage() > 1) {
$feed->addOpensearchLink($baseUrl . $results->getUrlQuery()->setPage($params->getPage() - 1, false), 'previous', $params->getView());
}
$lastPage = ceil($results->getResultTotal() / $params->getLimit());
if ($params->getPage() < $lastPage) {
$feed->addOpensearchLink($baseUrl . $results->getUrlQuery()->setPage($params->getPage() + 1, false), 'next', $params->getView());
}
$feed->addOpensearchLink($baseUrl . $results->getUrlQuery()->setPage($lastPage, false), 'last', $params->getView());
// add opensearch fields
$feed->setOpensearchTotalResults($results->getResultTotal());
$feed->setOpensearchItemsPerPage($params->getLimit());
$feed->setOpensearchStartIndex($results->getStartRecord() - 1);
$feed->setOpensearchSearchTerms($params->getQuery()->getString());
$records = $results->getResults();
foreach ($records as $current) {
$this->addEntry($feed, $current);
}
return $feed;
}