public function checkGameResult($cards)
 {
     $user = new AccountController();
     if (isset($cards['stand']) && $cards['playerResult'] <= $cards['dealerResult'] && $cards['dealerResult'] <= 21) {
         // lose
         $cards['win'] = 0;
         $user->updateChips($cards);
     } elseif (isset($cards['stand']) && $cards['playerResult'] <= 21 && $cards['playerResult'] > $cards['dealerResult']) {
         // win
         $cards['win'] = $cards['bet'] * 2;
         $cards['bankroll'] = $cards['win'] + $cards['bankroll'];
         $user->updateChips($cards);
     } elseif (isset($cards['stand']) && $cards['playerResult'] <= 21 && $cards['dealerResult'] > 21) {
         // win
         $cards['win'] = $cards['bet'] * 2;
         $cards['bankroll'] = $cards['win'] + $cards['bankroll'];
         $user->updateChips($cards);
     } elseif ($cards['playerResult'] > 21) {
         // lose
         $cards['win'] = 0;
         $user->updateChips($cards);
     }
     return $cards;
 }