magento2-docker/app/code/IpSupply/CartToQuote/Model/CartItemApi.php

<?php
namespace IpSupply\CartToQuote\Model;

use Magento\Framework\App\Helper\Context;
use IpSupply\CartToQuote\Api\CartItemInterface;
use Magento\Framework\ObjectManagerInterface;


class CartItemApi extends \Magento\Framework\App\Helper\AbstractHelper implements CartItemInterface
{
    protected $cartItemFactory;
    protected $_customerRepositoryInterface;
    protected $request;

    public function __construct(
        Context $context,
        \IpSupply\CartToQuote\Model\CartItemFactory $cartItemFactory,
        \Magento\Customer\Api\CustomerRepositoryInterface $customerRepositoryInterface,
        \Magento\Framework\Webapi\Rest\Request $request
    ) {
        $this->cartItemFactory = $cartItemFactory;
        $this->_customerRepositoryInterface = $customerRepositoryInterface;
        $this->request = $request;
        parent::__construct($context);
    }

    private function getCartItems($customerId) {
        $collection = $this->cartItemFactory->create()->getCollection();
        $data = $collection->addFieldToFilter('customer_id', ['eq' => $customerId])
            ->setOrder('name','ASC')
            ->getData();
        return $data;
    }

    private function isCartItem($item) {
        $collection = $this->cartItemFactory->create()->getCollection();
        $count = $collection->addFieldToSelect('id')
            ->addFieldToFilter('customer_id', ['eq' => $item["customer_id"]])
            ->addFieldToFilter('product_id', ['eq' => $item["product_id"]])
            ->count();
        if ($count > 0) {
             return true;
        }
        return false;
    }

    private function addCartItem($item) {
        if (!$this->isCartItem($item)) {
            $data = $this->cartItemFactory->create()->addData([
                'email' => $item["email"],
                'name' => $item["name"],
                'sku' => $item["sku"],
                'product_id' => $item["product_id"],
                'qty' => $item["qty"],
                'customer_id' => $item["customer_id"],
                'price' => $item["price"],
                'url' => $item["url"],
                'image' => $item["image"]
            ])->save();
            return $data;
        }

        return null;
    }

    private function removeCartItem($item) {
        $collection = $this->cartItemFactory->create()->getCollection();
        $count = $collection->addFieldToSelect('id')
            ->addFieldToFilter('customer_id', ['eq' => $item["customer_id"]])
            ->addFieldToFilter('product_id', ['eq' => $item["product_id"]])
            ->walk('delete');
    }

    private function clearCartItem($customerId) {
        $collection = $this->cartItemFactory->create()->getCollection();
        $count = $collection->addFieldToSelect('id')
            ->addFieldToFilter('customer_id', ['eq' => $customerId])
            ->walk('delete');
    }

    private function getCurrentCustomerId($data){
        $customer = $this->_customerRepositoryInterface->getById($data['customer_id']);
        if ($customer) {
            if ($customer->getEmail() == $data['email']){
                return $customer->getId();
            }
        }
        $customerId = $this->sessionFactory->create()->getCustomer()->getId();
        return 0;
    }

    /**
    * POST
    * @param string[] $data
    * @return string
    */
    public function addItem($data){
        $currentCustomerId = $this->getCurrentCustomerId($data);
        if ($currentCustomerId == 0) {
            return [];
        }

        $data['customer_id'] = $currentCustomerId;

        if (!$this->isCartItem($data)) {
            $this->addCartItem($data);
        }


        return $this->getCartItems($currentCustomerId);
    }

    /**
    * POST
    * @param string[] $data
    * @return string
    */
    public function updateItem($data){
        $currentCustomerId = $this->getCurrentCustomerId($data);
        if ($currentCustomerId == 0) {
            return [];
        }
        $data['customer_id'] = $currentCustomerId;

        if ($this->isCartItem($data)) {
            $this->removeCartItem($data);
            $this->addCartItem($data);
        }


        return $this->getCartItems($currentCustomerId);
    }

    /**
    * POST
    * @param string[] $data
    * @return string
    */
    public function removeItem($data){
        $currentCustomerId = $this->getCurrentCustomerId($data);
        if ($currentCustomerId == 0) {
            return [];
        }
        $data['customer_id'] = $currentCustomerId;

        $this->removeCartItem($data);

        return $this->getCartItems($currentCustomerId);

    }

    /**
    * get
    * @return string
    */
    public function getData(){
        $par = $this->_request->getParams();
        if (!array_key_exists('customer_id', $par) || !array_key_exists('email', $par)) {
            return [];
        }
        $currentCustomerId = $this->getCurrentCustomerId($par);
        if ($currentCustomerId == 0) {
            return [];
        }

        return $this->getCartItems($currentCustomerId);
    }

    /**
    * POST
    * @param string[] $data
    * @return string
    */
    public function clearItem($data){
        $currentCustomerId = $this->getCurrentCustomerId($data);
        if ($currentCustomerId == 0) {
            return [];
        }
        $this->clearCartItem($currentCustomerId);

        return $this->getCartItems($currentCustomerId);
    }

}