public function actionIndex()
 {
     if (Yii::$app->user->isGuest) {
         $dataProvider = new ArrayDataProvider(['allModels' => Tournaments::getAllTournaments()]);
         $dataProvider->sort = ['attributes' => ['startsOn'], 'defaultOrder' => ['startsOn' => SORT_DESC]];
         $dataProvider->pagination = ['pageSize' => 10];
         return $this->render('indexGuest', ['dataProvider' => $dataProvider]);
     }
     $user = Yii::$app->user->identity;
     Yii::$app->user->returnUrl = Yii::$app->request->url;
     //active tournaments where user participates
     $k = Tournaments::getActivePendingTournamentsUserParticipate($user->id);
     $userTournaments = new ArrayDataProvider(['allModels' => $k, 'sort' => ['attributes' => ['startsOn'], 'defaultOrder' => ['startsOn' => SORT_DESC]]]);
     $k = Tournaments::finishedTournamentsUserParticipated($user->id);
     $userFinishedTournaments = new ArrayDataProvider(['allModels' => $k, 'sort' => ['attributes' => ['startsOn'], 'defaultOrder' => ['startsOn' => SORT_DESC]]]);
     $k = Tournaments::getAllTournamentsUserNotParticipate($user->id);
     //all tournaments, those not finished - ability to start participating
     $notUserTournaments = new ArrayDataProvider(['allModels' => $k, 'sort' => ['attributes' => ['startsOn'], 'defaultOrder' => ['startsOn' => SORT_DESC]]]);
     return $this->render('indexUser', ['userTournaments' => $userTournaments, 'userFinishedTournaments' => $userFinishedTournaments, 'notUserTournaments' => $notUserTournaments]);
 }