/**
  * @param int wiki id
  * @param int avatar size
  *
  * @return array most active admins from last week ordered desc
  */
 public function getMostActiveAdmins($wikiId, $avatarSize)
 {
     $edits = $ids = $lastRevision = [];
     $admins = $this->getWikiAdmins($wikiId, $avatarSize);
     foreach ($admins as $admin) {
         if (isset($admin['userId'])) {
             $ids[] = $admin['userId'];
         }
     }
     $adminsEdits = DataMartService::getUserEditsByWikiId($ids, $wikiId);
     foreach ($admins as $key => $admin) {
         $userEdits = 0;
         if (empty($admin['userId']) || in_array($admin['userId'], self::$excludedWikiaUsers)) {
             unset($admins[$key]);
             continue;
         }
         if (isset($adminsEdits[$admin['userId']])) {
             $userEdits = $this->countAdminEdits($adminsEdits[$admin['userId']]);
         }
         $edits[$key] = $admins[$key]['edits'] = $userEdits;
         $lastRevision[$key] = $admins[$key]['lastRevision'];
     }
     array_multisort($edits, SORT_DESC, $lastRevision, SORT_DESC, $admins);
     return $admins;
 }