/**
* Helper to process an OAuth login form.
*
* @param Application $app
* @param Request $request
* @param Form $form
*
* @throws Exception\InvalidProviderException
*
* @return null|Response
*/
private function processOauthForm(Application $app, Request $request, Form $form)
{
$providerName = $form->getClickedButton()->getName();
$enabledProviders = $this->getMembersConfig()->getEnabledProviders();
if (array_key_exists($providerName, $enabledProviders)) {
$this->getMembersOauthProviderManager()->setProvider($app, $providerName);
return $this->processLogin($app, $request);
}
return null;
}