Method getCategoriesRoute

public static function getCategoriesRoute($lang = array())
{
    $app = Factory::getApplication();
    $menu = $app->getMenu();
    $active = $menu->getActive();
    $option = $app->input->get('option', '', 'string');
    $view = $app->input->get('view', '', 'string');
    $activeId = 0;
    if (isset($active->id)) {
        $activeId = $active->id;
    }
    $itemId = 0;
    if ((int) $activeId > 0 && $option == 'com_phocacart' && $view == 'category') {
        // 2) if there are two menu links, try to select the one active
        $itemId = $activeId;
    }
    $needles = array('categories' => '');
    //Create the link
    $link = 'index.php?option=com_phocacart&view=categories';
    if ($item = PhocacartRoute::_findItem($needles, 1, $lang)) {
        if (isset($item->query['layout'])) {
            $link .= '&layout=' . $item->query['layout'];
        }
        // $item->id should be a "categories view" and it should have preference to category view
        // so first we check item->id then itemId
        if (isset($item->id) && (int) $item->id > 0) {
            $link .= '&Itemid=' . $item->id;
        } else {
            if ((int) $itemId > 0) {
                $link .= '&Itemid=' . (int) $itemId;
            }
        }
    }
    return $link;
}