public function actionIndex()
    {
        $session_cart = Yii::app()->user->getState('cart');
        $products = array();
        foreach ($session_cart as $product_id => $quantity) $products[] = $product_id;
        $product_info = Product::model()->findAllByPk($products);

        $total_price = 0;
        $cart = array();
        foreach ($product_info as $product) {
            $product_id = $product->product_id;

            $cart[$product_id]['product_id'] = $product->product_id;
            $cart[$product_id]['title'] = $product->title;
            $cart[$product_id]['description'] = $product->description;
            $cart[$product_id]['price'] = $product->price;
            $cart[$product_id]['quantity'] = $session_cart[$product_id];
            $cart[$product_id]['total_price'] = round($session_cart[$product_id] * $product->price, 2);

            $total_price += $cart[$product_id]['total_price'];
        }