WPGENS RAF: hide referral link for users without referral orders

functions.php

<?php

add_filter('wpgens_raf_code', 'gens_raf_code', 10, 1);
function gens_raf_code($raf_code) {
    $current_user = wp_get_current_user();
    
    if (!user_has_friends($current_user->ID)) {
        return 'Referral code is available only to users with friends';
    }
    return $raf_code;
}

add_filter('wpgens_raf_link', 'gens_raf_link', 10, 3);
function gens_raf_link($raf_link, $referral_id, $type) {
    $current_user = wp_get_current_user();

    if (!user_has_friends($current_user->ID)) {
        return 'Referral link is available only to users with friends';
    }
    return $raf_link;
}

add_action('wp', 'wpgens_custom_account_tabs');
function wpgens_custom_account_tabs() {
    $current_user = wp_get_current_user();

    if (!user_has_friends($current_user->ID)) {
        $gens_plugin = WPGens_RAF::instance();
        remove_filter('woocommerce_account_menu_items', array($gens_plugin->my_account, 'gens_account_menu_item'), 10);
    }
}

function user_has_friends($user_id) {
    $num_friends = get_user_meta($user_id, 'gens_num_friends', true);
    return !empty($num_friends) && intval($num_friends) >= 1;
}