fusionner le devis client avec le devis client (si le client se connecte) magento 2 rest api

si 2 articles dans le panier si le client se connecte, les deux articles doivent ajouter le panier, les deux devis (avant la connexion et après la connexion) fusionnent et créent un devis final qui contient tous les articles du devis du client

Liens de référence que j'ai obtenus dans google

https://magento.stackexchange.com/a/62481

https://magento.stackexchange.com/a/30460

Par défaut, Magento 2 côté API ne fournit aucune API pour Fusionner le panier d'invité avec la carte client lorsque le client est connecté.

Mais vous pouvez remplacer le chariot invité par le chariot client.

API : (/V1/carts/:cartId) 
File : vendor/magento/module-quote/Model/QuoteManagement.php
Function : public function assignCustomer($cartId, $customerId, $storeId)

Mais si vous souhaitez développer des fonctionnalités Merge cart Live Magento côté Web, vous devez créer une API personnalisée.

Vous devez créer le plugin "Around" dans votre extension personnalisée.

app / code / MageKnight / Quote / etc / module.xml

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="MageKnight_Quote">
        <sequence>
            <module name="Magento_Quote"/>            
        </sequence>
    </module>
</config>

app / code / MageKnight / Quote / registration.php

<?php

use \Magento\Framework\Component\ComponentRegistrar;

ComponentRegistrar::register(ComponentRegistrar::MODULE, 'MageKnight_Quote', __DIR__);

app / code / MageKnight / Quote / etc / di.xml

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
     <type name="Magento\Quote\Api\CartManagementInterface">
        <plugin name="mergeGuestCart"
                type="MageKnight\Quote\Plugin\Model\CartManagement"/>
    </type>
</config>

app / code / MageKnight / Quote / Plugin / Model / CartManagement.php

<?php

namespace MageKnight\Quote\Plugin\Model;

use Magento\Framework\Exception\StateException;

/**
 * Class CartManagement
 */
class CartManagement
{
    /**
     * @var \Magento\Quote\Api\CartRepositoryInterface
     */
    protected $quoteRepository;

    /**
     * @var \Magento\Customer\Api\CustomerRepositoryInterface
     */
    protected $customerRepository;

    /**
     * @var \Magento\Customer\Model\CustomerFactory
     */
    protected $customerModelFactory;

    /**
     * @var \Magento\Quote\Model\QuoteIdMaskFactory
     */
    private $quoteIdMaskFactory;

    /**
     * @param \Magento\Quote\Api\CartRepositoryInterface $quoteRepository
     * @param \Magento\Customer\Api\CustomerRepositoryInterface $customerRepository
     * @param \Magento\Customer\Model\CustomerFactory $customerModelFactory
     * @param \Magento\Quote\Model\QuoteIdMaskFactory $quoteIdMaskFactory
     */
    public function __construct(
        \Magento\Quote\Api\CartRepositoryInterface $quoteRepository,
        \Magento\Customer\Api\CustomerRepositoryInterface $customerRepository,
        \Magento\Customer\Model\CustomerFactory $customerModelFactory,
        \Magento\Quote\Model\QuoteIdMaskFactory $quoteIdMaskFactory
    ) {
        $this->quoteRepository = $quoteRepository;
        $this->customerRepository = $customerRepository;
        $this->customerModelFactory = $customerModelFactory;
        $this->quoteIdMaskFactory = $quoteIdMaskFactory;
    }

    /**
     * Around plugin to assign customer to guest cart
     *
     * @param \Magento\Quote\Api\CartManagementInterface $subject
     * @param callable $proceed
     * @param int $cartId The cart ID.
     * @param int $customerId The customer ID.
     * @param int $storeId
     * @return boolean
     */
    public function aroundAssignCustomer(
        \Magento\Quote\Api\CartManagementInterface $subject,
        callable $proceed,
        $cartId,
        $customerId,
        $storeId
    ) {
        $quote = $this->quoteRepository->getActive($cartId);
        $customer = $this->customerRepository->getById($customerId);
        $customerModel = $this->customerModelFactory->create();

        if (!in_array($storeId, $customerModel->load($customerId)->getSharedStoreIds())) {
            throw new StateException(
                __("The customer can't be assigned to the cart. The cart belongs to a different store.")
            );
        }
        if ($quote->getCustomerId()) {
            throw new StateException(
                __("The customer can't be assigned to the cart because the cart isn't anonymous.")
            );
        }
        try {
            $customerActiveQuote = $this->quoteRepository->getForCustomer($customerId);
        } catch (\Magento\Framework\Exception\NoSuchEntityException $e) {
            $customerActiveQuote = false;
        }
        if ($customerActiveQuote) {
            /** Merge carts */
            $quote->merge($customerActiveQuote);
            $this->quoteRepository->delete($customerActiveQuote);
        }
        $quote->setCustomer($customer);
        $quote->setCustomerIsGuest(0);
        $quote->setStoreId($storeId);
        $quote->setIsActive(1);
        /** @var \Magento\Quote\Model\QuoteIdMask $quoteIdMask */
        $quoteIdMask = $this->quoteIdMaskFactory->create()->load($cartId, 'quote_id');
        if ($quoteIdMask->getId()) {
            $quoteIdMask->delete();
        }
        $this->quoteRepository->save($quote);
        return true;
    }
}