GeomyWP fields

/**
 * Random string in permastructure
 * Use %state% and %city% in "Permastructure" settings
 */
function pm_extra_permastructure_tags($default_uri, $native_slug, $post, $slug, $native_uri) {
    // Do not affect native URIs
    // Limit to 'product' post type only
    if($native_uri == true || empty($post->post_type) || $post->post_type !== 'product') { return $default_uri; }

    // Store post ID in a separate variable
    $post_id = $post->ID;

    // Get post location data
    $post_location = gmw_get_post_location_data($post_id);

    if(strpos($default_uri, '%state%') !== false) {
        // Use GeomyWP API to get the 'state' field
        // ...

        $state = '';

        $default_uri = str_replace('%state%', $state, $default_uri);
    }

    if(strpos($default_uri, '%city%') !== false) {
        // Use GeomyWP API to get the 'city' field
        // ...

        $city = '';

        $default_uri = str_replace('%city%', $city, $default_uri);
    }

    return $default_uri;
}
add_filter('permalink_manager_filter_default_post_uri', 'pm_extra_permastructure_tags', 3, 5);