/**
  * Accepts a Solarium select result and a search config.
  * If not the root search result set, you should provide the parent and metaposition.
  * @param Solarium_Result_Select $result
  * @param WikiaSearchConfig $searchConfig
  * @param WikiaSearchResultSet $parent
  * @param int $metaposition
  */
 public function __construct(Solarium_Result_Select $result, WikiaSearchConfig $searchConfig, $parent = null, $metaposition = null)
 {
     wfProfileIn(__METHOD__);
     parent::__construct();
     $this->searchResultObject = $result;
     $this->searchConfig = $searchConfig;
     $this->setQuery($searchConfig->getQuery(WikiaSearchConfig::QUERY_ENCODED));
     if ($result instanceof Solarium_Result_Select_Empty) {
         return;
     }
     if ($parent === null && $this->searchConfig->getGroupResults()) {
         $this->setResultGroupings($result, $searchConfig);
         $this->setResultsFound($this->getHostGrouping()->getMatches());
     } else {
         $this->parent = $parent;
         $this->metaposition = $metaposition;
         $this->highlightingObject = $result->getHighlighting();
         $this->setResultsStart($result->getStart())->setQueryTime($result->getQueryTime());
         if ($this->parent !== null && $this->metaposition !== null) {
             $this->prepareChildResultSet();
         } else {
             // default behavior for an ungrouped search result set
             $this->prependArticleMatchIfExists()->setResults($this->searchResultObject->getDocuments())->setResultsFound($this->resultsFound + $this->searchResultObject->getNumFound());
         }
     }
     wfProfileOut(__METHOD__);
 }
 /**
  * perform search
  * @param  WikiaSearchConfig $searchConfig
  * @return WikiaSearchResultSet
  */
 public function doSearch(WikiaSearchConfig $searchConfig)
 {
     wfProfileIn(__METHOD__);
     if ($searchConfig->getGroupResults() == true) {
         $searchConfig->setLength(self::GROUP_RESULTS_GROUPINGS_LIMIT)->setIsInterWiki(true)->setStart((int) $searchConfig->getLength() * ((int) $searchConfig->getPage() - 1));
     } else {
         $searchConfig->setStart(($searchConfig->getPage() - 1) * $searchConfig->getLength());
     }
     try {
         $result = $this->client->select($this->getSelectQuery($searchConfig));
     } catch (Exception $e) {
         Wikia::log(__METHOD__, 'Querying Solr First Time', $e);
         $searchConfig->setSkipBoostFunctions(true);
         try {
             $result = $this->client->select($this->getSelectQuery($searchConfig));
         } catch (Exception $e) {
             Wikia::log(__METHOD__, 'Querying Solr With No Boost Functions', $e);
             $result = F::build('Solarium_Result_Select_Empty');
         }
     }
     $results = F::build('WikiaSearchResultSet', array($result, $searchConfig));
     $searchConfig->setResults($results)->setResultsFound($results->getResultsFound());
     if ($searchConfig->getPage() == 1) {
         $resultCount = $results->getResultsFound();
         Track::event(!empty($resultCount) ? 'search_start' : 'search_start_nomatch', array('sterm' => $searchConfig->getQuery(), 'rver' => self::RELEVANCY_FUNCTION_ID, 'stype' => $searchConfig->getCityId() == 0 ? 'inter' : 'intra'));
     }
     wfProfileOut(__METHOD__);
     return $results;
 }