assign a downloadable product to a customer magento 2

Question

I have created a plugin that allows customers to buy downloadable products as a customer and creates a user for them. It assigns the order to the customer, they receive an invoice. On the admin side I can see the order assigned to them ( it has a status of complete ) and on their account, they can see the order. When they check their account under my products it is not there. This is in Magento 2. How do I assign the product to the customer so they can download it?

Answer 1

Upon creation of the order, the links are given the customer id of the order. Since, I created the order with no customer id and then assigned only the order a customer id, the link was always missing the customer id.

/*
 * @var $this->downloadLink = \Magento\Downloadable\Model\Link\PurchasedFactory;
 */
 $items = $order->getAllItems();
foreach($items as $item){
    //look for downloadable products
    if($item->getProductType() === 'downloadable'){
        // create link from repository
        $link = $this->downloadLink->create()->load($item->getId(), 'order_item_id');
        $link->setCustomerId($customer->getId());
        $link->save();
    }
}