Add to body class based on WLM level

<?php
// http://www.gravityhelp.com/forums/topic/changing-the-background-color-of-a-post
// filter the body class
add_filter( 'body_class', 'adzoom_wishlist_member_classes' );

// function to add body class based on wishlist member weekly, 180 day or 365 day
function adzoom_wishlist_member_classes ($classes) {

    // grab the current user's wishlist member levels
    global $current_user;
    $user_id = $current_user->ID;
    $levels = wlmapi_get_member_levels($user_id);
    $levels = $levels['levels']['level'];

    // these three if statements will all run, no matter what, in case there are multiple membership levels possible for a member?
    // not sure if that's possible, but the wlmapi_get_member_levels returns an array, which could be multiple membership levels

    // add the membership levels to the body class
    if(in_array(365, $levels)) {
        // add 'year-member' to the $classes array
        $classes[] = 'year-member';
    }
    if(in_array(180, $levels)) {
        // add 'half-year-member' to the $classes array
        $classes[] = 'half-year-member';
    }
    if(in_array('weekly', $levels)) {
        // add 'week-member' to the $classes array
        $classes[] = 'week-member';
    }

    // return the $classes array no matter what
    return $classes;
}