/**
  * A more textual interface to the MoreLikeThis functionality
  * @param  WikiaSearchConfig $searchConfig
  * @return array of urls to array of wid and pageid
  */
 public function getSimilarPages(WikiaSearchConfig $searchConfig)
 {
     wfProfileIn(__METHOD__);
     $streamUrl = false;
     $streamBody = false;
     $query = $searchConfig->getQuery();
     if ($query == false) {
         $streamUrl = $searchConfig->getStreamUrl();
         if ($streamUrl === false) {
             $streamBody = $searchConfig->getStreamBody();
         }
     }
     if ($streamUrl || $streamBody) {
         $searchConfig->setFilterQuery($this->getQueryClausesString($searchConfig));
     }
     $searchConfig->setMltBoost(true)->setMltFields(array(self::field('title'), self::field('html'), 'title'));
     $resultSet = $this->moreLikeThis($searchConfig);
     $response = array();
     foreach ($resultSet as $similarPage) {
         $response[$similarPage['url']] = array('wid' => $similarPage['wid'], 'pageid' => $similarPage['pageid']);
     }
     wfProfileOut(__METHOD__);
     return $response;
 }