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<?php
/**
 * Webkul Software
 *
 * @category  Webkul
 * @package   Webkul_PrivateShop
 * @author    Webkul Software Private Limited
 * @copyright Webkul Software Private Limited (https://webkul.com)
 * @license   https://store.webkul.com/license.html
 */
namespace Webkul\PrivateShop\Observer;

use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\Serialize\Serializer\Json;
use Magento\Framework\Message\ManagerInterface;
use Magento\Checkout\Model\Cart;
use Magento\Catalog\Model\ProductFactory;
use Magento\Customer\Model\CustomerFactory;
use Webkul\PrivateShop\Model\PrivateProductFactory;

class VerfiyCart implements ObserverInterface
{
    /**
     * @var ProductFactory
     */
    protected $productFactory;

    /**
     * @var \Magento\Framework\Serialize\Serializer\Json
     */
    protected $jsonSerializer;
    
    /**
     * @var ManagerInterface
     */
    protected $messageManager;

    /**
     * @var Cart
     */
    protected $cart;

    /**
     * @var CustomerFactory
     */
    protected $customerFactory;
    
    /**
     * @var PrivateProductFactory
     */
    protected $privateProductFactory;
    /**
     *
     * @param Json $jsonSerializer
     * @param ManagerInterface $messageManager
     * @param Cart $cart
     * @param ProductFactory $productFactory
     * @param CustomerFactory $customerFactory
     * @param PrivateProductFactory $privateProductFactory
     */
    public function __construct(
        Json $jsonSerializer,
        ManagerInterface $messageManager,
        Cart $cart,
        ProductFactory $productFactory,
        CustomerFactory $customerFactory,
        PrivateProductFactory $privateProductFactory
    ) {
        $this->jsonSerializer = $jsonSerializer;
        $this->messageManager = $messageManager;
        $this->cart = $cart;
        $this->productFactory = $productFactory;
        $this->customerFactory = $customerFactory;
        $this->privateProductFactory = $privateProductFactory;
    }

    /**
     * @inheritDoc
     */
    public function execute(\Magento\Framework\Event\Observer $observer)
    {
        $cart = $this->cart;
        $cartItems = $cart->getItems();
        
        if ($cartItems && $cartItems->getSize()) {
            $message = false;
            foreach ($cartItems as $item) {
                $productId = $item->getProduct()->getId();
                $flag = $this->isPrivateProduct($productId);
                if ($flag) {
                    $cart->removeItem($item->getId());
                    $cart->getQuote()->setTotalsCollectedFlag(false);
                    $cart->save();
                    $message = true;
                }
            }
            if ($message) {
                $this->messageManager->addNotice(__('Some unauthorized items removed from your cart.'));
            }
        }
    }

    /**
     * Is PrivateProduct
     *
     * @param [int] $productId
     * @return boolean
     */
    public function isPrivateProduct($productId)
    {
        $product = $this->productFactory->create()->load($productId);
        $customerGroups = [];
        if ($product->getIsPrivateProduct()) {
            $customerSession = $this->cart->getCustomerSession();
            $customerId = $customerSession->getId();
            if ($customerSession->isLoggedIn() && $customerId) {
                $customer = $this->customerFactory->create()->load($customerId);
                $privateGroup = $customer->getData('customer_private_group');
                if ($privateGroup) {
                    $customerGroups = $this->jsonSerializer->unserialize(
                        $privateGroup
                    );
                }
            }
            $collection = $this->privateProductFactory->create()->getCollection()
                            ->addFieldToFilter('product_id', ['eq' => $productId])
                            ->addFieldToFilter('group_id', ['in' => $customerGroups]);
            if ($collection->getSize()) {
                return false;
            }
            return true;
        }
        return false;
    }
}