PropertyHive - Show login required popup for shortlist shortcode

snippet.php

add_shortcode('force_login_shortlist_button', 'force_login_shortlist_button');
function force_login_shortlist_button()
{
    if ( is_user_logged_in() )
    {
        return do_shortcode('[shortlist_button class="action-shortlist"]');
    }

    $assets_path = str_replace( array( 'http:', 'https:' ), '', PH()->plugin_url() ) . '/assets/';

    wp_enqueue_script( 'propertyhive_fancybox', $assets_path . 'js/fancybox/jquery.fancybox.js', array( 'jquery' ), '3.1.5', true );
    wp_enqueue_style( 'propertyhive_fancybox_css', $assets_path . 'css/jquery.fancybox.css' );

    ob_start();
    ?>

    <a id="add-shortlist" href="" class="action-shortlist" rel="nofollow">Add To Shortlist</a>

    <script>

        jQuery(document).ready(function() {
            var fancybox_html = '<div id="login-fancybox" style="display:none;">' +
            '<h2>Login required</h2>' +
            '<p>You must be logged in to add properties to your shortlist.</p>' +
            '</div>';
            jQuery('body').append(fancybox_html);
            jQuery('#add-shortlist').click(function(e) {
                e.preventDefault();
                jQuery.fancybox.open({
                    src: '#login-fancybox',
                    type: 'inline'
                });
            });
        });
    </script>
    <?php
    return ob_get_clean();
}