<?php
					
						
						
namespace Mypos\IPC;
					
						
						
/**
					
						
						
 * Purchase cart object
					
						
						
 */
					
						
						
class Cart
					
						
						
{
					
						
						
    /**
					
						
						
     * Array containing cart items
					
						
						
     *
					
						
						
     * @var array
					
						
						
     */
					
						
						
    private $cart;
					
						
						
    /**
					
						
						
     *
					
						
						
     * @param string $itemName Item name
					
						
						
     * @param int $quantity Items quantity
					
						
						
     * @param float $price Single item price
					
						
						
     *
					
						
						
     * @return Cart
					
						
						
     * @throws IPC_Exception
					
						
						
     */
					
						
						
    public function add($itemName, $quantity, $price)
					
						
						
    {
					
						
						
        if (empty($itemName)) {
					
						
						
            throw new IPC_Exception('Invalid cart item name');
					
						
						
        }
					
						
						
        if (empty($quantity) || !Helper::isValidCartQuantity($quantity)) {
					
						
						
            throw new IPC_Exception('Invalid cart item quantity');
					
						
						
        }
					
						
						
        if (empty($price) || !Helper::isValidAmount($price)) {
					
						
						
            throw new IPC_Exception('Invalid cart item price');
					
						
						
        }
					
						
						
        $this->cart[] = [
					
						
						
            'name' => $itemName,
					
						
						
            'quantity' => $quantity,
					
						
						
            'price' => $price,
					
						
						
        ];
					
						
						
        return $this;
					
						
						
    }
					
						
						
    /**
					
						
						
     * Returns cart total amount
					
						
						
     *
					
						
						
     * @return float
					
						
						
     */
					
						
						
    public function getTotal()
					
						
						
    {
					
						
						
        $sum = 0;
					
						
						
        if (!empty($this->cart)) {
					
						
						
            foreach ($this->cart as $v) {
					
						
						
                $sum += $v['quantity'] * $v['price'];
					
						
						
            }
					
						
						
        }
					
						
						
        return $sum;
					
						
						
    }
					
						
						
    /**
					
						
						
     * Returns count of items in cart
					
						
						
     *
					
						
						
     * @return int
					
						
						
     */
					
						
						
    public function getItemsCount()
					
						
						
    {
					
						
						
        return (is_array($this->cart) && !empty($this->cart)) ? count($this->cart) : 0;
					
						
						
    }
					
						
						
    /**
					
						
						
     * Validate cart items
					
						
						
     *
					
						
						
     * @return boolean
					
						
						
     * @throws IPC_Exception
					
						
						
     */
					
						
						
    public function validate()
					
						
						
    {
					
						
						
        if (!$this->getCart() || count($this->getCart()) == 0) {
					
						
						
            throw new IPC_Exception('Missing cart items');
					
						
						
        }
					
						
						
        return true;
					
						
						
    }
					
						
						
    /**
					
						
						
     * Return cart array
					
						
						
     *
					
						
						
     * @return array
					
						
						
     */
					
						
						
    public function getCart()
					
						
						
    {
					
						
						
        return $this->cart;
					
						
						
    }
					
						
						
}