public function getProductLabels($product) 
    {
        $html = '';

        if ($this->isProductOnSale($product)) {
            if ($this->isShowPercentage() && $this->getSalePercentage($product) > 0) {
                $html .= '<span class="sale-label sale-value">'.$this->getSalePercentage($product).'%</span>';
            } else {
                $html .= '<span class="sale-label">'.$this->getSaleLabel().'</span>';
            }
        } elseif ($this->isProductNew($product)) {
            $html .= '<span class="new-label">'.$this->getNewLabel().'</span>';
        }

        return $html;
    }