Method doesExist

public static function doesExist($type)
{
    switch ($type) {
        case 'category':
            $q = 'SELECT id FROM #__phocacart_categories ORDER BY id LIMIT 1';
            break;
        case 'tax':
            $q = 'SELECT id FROM #__phocacart_taxes ORDER BY id LIMIT 1';
            break;
        case 'product':
            $q = 'SELECT id FROM #__phocacart_products ORDER BY id LIMIT 1';
            break;
        case 'shipping':
            $q = 'SELECT id FROM #__phocacart_shipping_methods ORDER BY id LIMIT 1';
            break;
        case 'payment':
            $q = 'SELECT id FROM #__phocacart_payment_methods ORDER BY id LIMIT 1';
            break;
        case 'country':
            $q = 'SELECT id FROM #__phocacart_countries ORDER BY id LIMIT 1';
            break;
        case 'region':
            $q = 'SELECT id FROM #__phocacart_regions ORDER BY id LIMIT 1';
            break;
        case 'menu':
            $q = 'SELECT id FROM #__menu WHERE client_id = 0 AND link LIKE \'index.php?option=com_phocacart%\' ORDER BY id LIMIT 1';
            break;
        case 'module':
            $q = 'SELECT id FROM #__modules WHERE module LIKE \'mod_phocacart%\' ORDER BY id LIMIT 1';
            break;
        case 'option':
        default:
            $q = 'SELECT params FROM #__extensions WHERE type = \'component\' AND element = \'com_phocacart\' ORDER BY params LIMIT 1';
            break;
    }
    $db = Factory::getDBO();
    $db->setQuery($q);
    $item = $db->loadResult();
    if ($type == 'option') {
        $item = str_replace('{}', '', $item);
        if (isset($item) && $item != '') {
            return 1;
        }
    } else {
        if (isset($item) && (int) $item > 0) {
            return 1;
        }
    }
    return 0;
}