Controller/ProfileController.php
public function usernameAvailableAction( Request $request )
    {
        $response = array(
            'cssClass' => 'success',
            'text' => 'username is available',
        );
        $user = $this->get( 'userfriendly_social_user.oauth_user_provider' )
                     ->findOneByUsernameSlug( $request->get( 'username_slug' ));
        $currentUser = $this->get( 'security.context' )->getToken()->getUser();
        if ( $currentUser->getId() != $user->getId() && !$this->get( 'security.context' )->isGranted( 'ROLE_ADMIN' ))
        {
            throw new NotFoundHttpException();
        }
        $requestedUsername = $request->get( 'username' );
        $canonicalUsername = $this->get( 'fos_user.util.username_canonicalizer' )->canonicalize( $requestedUsername );
        if ( $requestedUsername != $user->getUsername() )
        {
            $users = $repo->findByUsernameCanonical( $canonicalUsername );
            if ( count( $users ) > 0 )
            {
                $response['cssClass'] = 'error';
                $response['text'] = 'username not available';
            }
        }
        return new Response( json_encode( $response ));
    }
public function usernameAvailableAction( Request $request )
    {
        $response = array(
            'cssClass' => 'success',
            'text' => 'username is available',
        );
        $user = $this->get( 'userfriendly_social_user.oauth_user_provider' )
                     ->findOneByUsernameSlug( $request->get( 'username_slug' ));
        $currentUser = $this->get( 'security.context' )->getToken()->getUser();
        if ( $currentUser->getId() != $user->getId() && !$this->get( 'security.context' )->isGranted( 'ROLE_ADMIN' ))
        {
            throw new NotFoundHttpException();
        }
        $requestedUsername = $request->get( 'username' );
        $canonicalUsername = $this->get( 'fos_user.util.username_canonicalizer' )->canonicalize( $requestedUsername );
        if ( $requestedUsername != $user->getUsername() )
        {
            $users = $repo->findByUsernameCanonical( $canonicalUsername );
            if ( count( $users ) > 0 )
            {
                $response['cssClass'] = 'error';
                $response['text'] = 'username not available';
            }
        }
        return new Response( json_encode( $response ));
    }
public function usernameAvailableAction ( Request $ request ) { $ response = array ( 'cssClass' => 'success' , 'text' => 'username is available' , ) ; $ user = $ this -> get ( 'userfriendly_social_user.oauth_user_provider' ) -> findOneByUsernameSlug ( $ request -> get ( 'username_slug' ) ) ; $ currentUser = $ this -> get ( 'security.context' ) -> getToken ( ) -> getUser ( ) ; if ( $ currentUser -> getId ( ) != $ user -> getId ( ) && ! $ this -> get ( 'security.context' ) -> isGranted ( 'ROLE_ADMIN' ) ) { throw new NotFoundHttpException ( ) ; } $ requestedUsername = $ request -> get ( 'username' ) ; $ canonicalUsername = $ this -> get ( 'fos_user.util.username_canonicalizer' ) -> canonicalize ( $ requestedUsername ) ; if ( $ requestedUsername != $ user -> getUsername ( ) ) { $ users = $ repo -> findByUsernameCanonical ( $ canonicalUsername ) ; if ( count ( $ users ) > 0 ) { $ response [ 'cssClass' ] = 'error' ; $ response [ 'text' ] = 'username not available' ; } } return new Response ( json_encode ( $ response ) ) ; }
AJAX action for checking username availability

@param \Symfony\Component\HttpFoundation\Request $request
@return \Symfony\Component\HttpFoundation\Response
AJAX action for checking username availability