BcUtil::loginUser PHP Method

    public static function loginUser($prefix = 'admin')
    {
        $Session = new CakeSession();
        $sessionKey = BcUtil::authSessionKey($prefix);
        $user = $Session->read('Auth.' . $sessionKey);
        if (!$user) {
            if (!empty($_SESSION['Auth'][$sessionKey])) {
                $user = $_SESSION['Auth'][$sessionKey];
            }
        }
        return $user;
    }

 /**
  * afterSave
  *
  * @param CakeEvent $event
  * @return boolean
  */
 public function afterSave(CakeEvent $event)
 {
     $model = $event->subject;
     $modelName = $model->name;
     $modelId = null;
     $revision = null;
     $limit = null;
     if (array_key_exists($modelName, Configure::read('RevisionControl.models')) && $model->data[$modelName]['id']) {
         $modelId = $model->data[$modelName]['id'];
         $limit = Configure::read('RevisionControl.limit');
         $revisionControlMdl = ClassRegistry::init('RevisionControl.RevisionControl');
         // 最新リビジョン番号を取得
         $prevData = $revisionControlMdl->find('first', array('conditions' => array('model_name' => $modelName, 'model_id' => $modelId), 'order' => 'revision desc'));
         if (isset($prevData['RevisionControl']['revision'])) {
             $revision = intval($prevData['RevisionControl']['revision']) + 1;
         } else {
             $revision = 1;
         }
         // タイムスタンプデータを削除
         $revData = array('RevisionControl' => array('model_name' => $modelName, 'model_id' => $modelId, 'revision' => $revision, 'deta_object' => serialize($model->data)));
         // 更新ユーザ情報を追加
         $user = BcUtil::loginUser();
         if ($user) {
             $revData['RevisionControl']['user_id'] = $user['id'];
         }
         // 保存
         $revisionControlMdl->save($revData, false);
         // リビジョン制限オーバーデータの削除
         if ($limit) {
             $revisionList = $revisionControlMdl->find('all', array('conditions' => array('model_name' => $modelName, 'model_id' => $modelId), 'order' => 'revision desc'));
             $i = 0;
             foreach ($revisionList as $data) {
                 if (++$i > $limit) {
                     $revisionControlMdl->delete(intval($data['RevisionControl']['id']));
                 }
             }
         }
     }
     return true;
 }