interface SSOLogin
{
  /**
   * 获取登录用户信息
   * @param $ticket
   * @return mixed
   */
  public function getInfoFromTicket($ticket);
  /**
   * 单点登录授权地址
   * @return mixed
   */
  public function getAuthUrl();
}

/**
 * 检测是否单点登录
 * @return bool|string
 */
public function actionCheck()
{
  $ticket = Yii::$app->getRequest()->get('ticket');
  if (!$ticket) {
    return $this->renderAuthError('请先授权', sprintf('<a href="%s">点击登录单点登录系统</a>', SSOlogin::getInstance()->getAuthUrl()));
  }
  $userInfo = SSOlogin::getInstance()->getInfoFromTicket($ticket);
  if (empty($userInfo['username'])) {
    return $this->renderAuthError('请先授权', sprintf('<a href="%s">点击登录单点登录系统</a>', SSOlogin::getInstance()->getAuthUrl()));
  }
  $username = $this->getUserName($userInfo['username']);
  $user = User::find()->canLogin()->username($username)->one();
  if (!$user) {
    $newUser = [];
    $newUser['username'] = $userInfo['username'];
    $newUser['email'] = $this->getUserName($userInfo['username']);
    $newUser['role'] = User::ROLE_DEV;
    $newUser['is_email_verified'] = 1;
    $newUser['realname'] = $userInfo['truename'];
    $user = $this->addUser($newUser);
  }
  $isLogin = Yii::$app->user->login($user, 3600 * 24 * 30);
  if ($isLogin) {
    $this->redirect('/task/index');
  }
  return true;
}