Mrthdrb

Is there a way to somehow take the existing quote and create a new one identical to it but with a new ID?

This is what I currently have:

Updated following suggestions from @Vishwas:

use MagentoFrameworkAppActionContext;
use MagentoFrameworkControllerResultFactory;
use MagentoStoreModelStoreManagerInterface;
use MagentoQuoteModelQuoteRepository;
use MagentoFrameworkMailTemplateTransportBuilder;
use MagentoFrameworkTranslateInlineStateInterface;
use MagentoCheckoutModelCart;
use MagentoCatalogModelProductFactory;

class ShareCart extends MagentoFrameworkAppActionAction

 protected $resultFactory;
 protected $storeManager;
 protected $quoteFactory;
 protected $transportBuilder;
 protected $stateInterface;
 protected $cart;
 protected $productFactory;

 public function __construct(
 Context $context,
 ResultFactory $resultFactory,
 StoreManagerInterface $storeManager,
 QuoteRepository $quoteFactory,
 TransportBuilder $transportBuilder,
 StateInterface $stateInterface,
 Cart $cart,
 ProductFactory $productFactory
 ) 
 $this->resultFactory = $resultFactory;
 $this->storeManager = $storeManager;
 $this->quoteFactory = $quoteFactory;
 $this->transportBuilder = $transportBuilder;
 $this->stateInterface = $stateInterface;
 $this->cart = $cart;
 $this->productFactory = $productFactory;

 parent::__construct($context);
 
 public function execute()
 
 try
 
 $post = (array) $this->getRequest()->getPost();

 $id = $this->cart->getQuote()->getId();

 if ($id > 0) 
 $quote = $this->quoteFactory->get($id);
 $items = $quote->getAllVisibleItems();

 foreach ($items as $item) 
 $productId = $item->getProductId();
 $_product = $this->productFactory->create()->load($productId);

 $options = $item->getProduct()->getTypeInstance(true)->getOrderOptions($item->getProduct());

 $info = $options['info_buyRequest'];
 $request1 = new MagentoFrameworkDataObject();
 $request1->setData($info);

 $this->cart->addProduct($_product, $request1);
 
 $this->cart->save();

 // Retrieve form data
 $email = $post['basketshare-email'];
 $message = $post['basketshare-message'];

 $from_name = "";
 
 catch (Exception $e) 
 $this->messageManager->addError(__($e->getMessage()));
 

All you need to do is to paste below code in controller action that you are executing for copying quote and copy one quote with all product items into another.

<?php
use MagentoFrameworkAppActionContext;
use MagentoFrameworkViewResultPageFactory;
use MagentoQuoteModelQuoteFactory;
use MagentoCheckoutModelCart;
use MagentoCatalogModelProductFactory;
class Copyquote extends MagentoFrameworkAppActionAction

 protected $_resultPageFactory;
 protected $quoteFactory;
 protected $formKey;
 protected $cart;
 protected $product;
 public function __construct(
 Context $context,
 PageFactory $resultPageFactory,
 QuoteFactory $quoteFactory,
 Cart $cart,
 ProductFactory $product
 ) 
 $this->_resultPageFactory = $resultPageFactory;
 $this->quoteFactory = $quoteFactory;
 $this->cart = $cart;
 $this->product = $product;
 parent::__construct($context);
 
 public function execute()
 
 try
 
 $id = 'YOUR QUOTE ID';
 if ($id > 0) 
 $quote = $this->quoteFactory->create()->load($id);
 $items = $quote->getAllVisibleItems();

 foreach ($items as $item) 
 $productId = $item->getProductId();
 $_product = $this->product->create()->load($productId);

 $options = $item->getProduct()->getTypeInstance(true)->getOrderOptions($item->getProduct());

 $info = $options['info_buyRequest'];
 $request1 = new MagentoFrameworkDataObject();
 $request1->setData($info);

 $this->cart->addProduct($_product, $request1);
 
 $this->cart->save();
 
 catch (Exception $e) 
 $this->messageManager->addError(__($e->getMessage()));
 
 

Now you can use or customize this code according to your need of copying one quote to another one in your Magento store