Dokkan - %store% tag

/**
 * Use %store% in Products' permastructure settings
 */
function pm_dokan_store_field($default_uri, $native_slug, $post, $slug, $native_uri) {
    // Do not affect native URIs
    if($native_uri == true || empty($post->post_type) || $post->post_type !== 'product') { return $default_uri; }

    if(strpos($default_uri, '%store%') !== false) {
        $store_name = get_user_meta($post->post_author, 'dokan_store_name', true);
        $default_uri = str_replace('%store%', sanitize_title($store_name), $default_uri);
    }

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