/**
* merge top level multi-queries and resolve returned pageIds into Title objects.
*
* WARNING: experimental API
*
* @param string $query the user query
* @param \Elastica\Response $response Response from elasticsearch _suggest api
* @param array $profiles the suggestion profiles
* @param int $limit Maximum suggestions to return, -1 for unlimited
* @return SearchSuggestionSet a set of Suggestions
*/
protected function postProcessSuggest(\Elastica\Response $response, $profiles, $limit = -1)
{
$this->logContext['elasticTookMs'] = intval($response->getQueryTime() * 1000);
$data = $response->getData();
unset($data['_shards']);
$suggestions = array();
foreach ($data as $name => $results) {
$discount = $profiles[$name]['discount'];
foreach ($results as $suggested) {
foreach ($suggested['options'] as $suggest) {
$output = SuggestBuilder::decodeOutput($suggest['text']);
if ($output === null) {
// Ignore broken output
continue;
}
$pageId = $output['id'];
$type = $output['type'];
$score = $discount * $suggest['score'];
if (!isset($suggestions[$pageId]) || $score > $suggestions[$pageId]->getScore()) {
$suggestion = new SearchSuggestion($score, null, null, $pageId);
// If it's a title suggestion we have the text
if ($type === SuggestBuilder::TITLE_SUGGESTION) {
$suggestion->setText($output['text']);
}
$suggestions[$pageId] = $suggestion;
}
}
}
}
// simply sort by existing scores
uasort($suggestions, function ($a, $b) {
return $b->getScore() - $a->getScore();
});
$this->logContext['hitsTotal'] = count($suggestions);
if ($limit > 0) {
$suggestions = array_slice($suggestions, 0, $limit, true);
}
$this->logContext['hitsReturned'] = count($suggestions);
$this->logContext['hitsOffset'] = 0;
// we must fetch redirect data for redirect suggestions
$missingText = array();
foreach ($suggestions as $id => $suggestion) {
if ($suggestion->getText() === null) {
$missingText[] = $id;
}
}
if (!empty($missingText)) {
// Experimental.
//
// Second pass query to fetch redirects.
// It's not clear if it's the best option, this will slowdown the whole query
// when we hit a redirect suggestion.
// Other option would be to encode redirects as a payload resulting in a
// very big index...
// XXX: we support only the content index
$type = $this->connection->getPageType($this->indexBaseName, Connection::CONTENT_INDEX_TYPE);
// NOTE: we are already in a poolCounterWork
// Multi get is not supported by elastica
$redirResponse = null;
try {
$redirResponse = $type->request('_mget', 'GET', array('ids' => $missingText), array('_source_include' => 'redirect'));
if ($redirResponse->isOk()) {
$this->logContext['elasticTook2PassMs'] = intval($redirResponse->getQueryTime() * 1000);
$docs = $redirResponse->getData();
foreach ($docs['docs'] as $doc) {
if (empty($doc['_source']['redirect'])) {
continue;
}
// We use the original query, we should maybe use the variant that generated this result?
$text = Util::chooseBestRedirect($this->term, $doc['_source']['redirect']);
if (!empty($suggestions[$doc['_id']])) {
$suggestions[$doc['_id']]->setText($text);
}
}
} else {
LoggerFactory::getInstance('CirrusSearch')->warning('Unable to fetch redirects for suggestion {query} with results {ids} : {error}', array('query' => $this->term, 'ids' => serialize($missingText), 'error' => $redirResponse->getError()));
}
} catch (\Elastica\Exception\ExceptionInterface $e) {
LoggerFactory::getInstance('CirrusSearch')->warning('Unable to fetch redirects for suggestion {query} with results {ids} : {error}', array('query' => $this->term, 'ids' => serialize($missingText), 'error' => $this->extractMessage($e)));
}
}
return new SearchSuggestionSet(array_filter($suggestions, function ($suggestion) {
// text should be not empty for suggestions
return $suggestion->getText() != null;
}));
}
/**
* @dataProvider provideOutputEncoder
*/
public function testOutputEncoder($expected, $encoded)
{
$this->assertEquals($expected, SuggestBuilder::decodeOutput($encoded));
}