Whity Page - Show a different front page if the user is not logged in

Whity-page.php

<?php
/*
Template Name: Whity Page
Show a different front page if the user is not logged in. In this case we use a white page without any content.
*/

$frontpage_id = get_option( 'page_on_front' );
$get_page_template = get_post_meta( $frontpage_id, '_wp_page_template', true );
// Set template name (ex.page-whity.php);
$template_name = 'page-whity.php';

if( $get_page_template == $template_name ) {
  $user = wp_get_current_user();
  $allowed_roles = array('editor', 'administrator', 'author');

  if( array_intersect($allowed_roles, $user->roles ) ) {
    // Set the page ID to redirect to
    $post_id = 71;
    $wp_redirect_url = get_permalink( $post_id );
    wp_redirect( $wp_redirect_url );
    exit;
  }
}
?>