EXCELIA_DBARR/custom/bbus/class/sellproduct.class.php

<?php
require_once DOL_DOCUMENT_ROOT.'/product/class/product.class.php';
class SellProduct
{
    private $user;
    private $db;

    public function __construct()
    {
        global $db, $user;
        
        $this->db = $db;
        $this->user = $user;
    }
    /**
     * 
     */
    public function getProductByBarcode(string $barcode): ?Product
    {
        $result = null;

        $product = new Product($this->db);
        if ($product->fetch('', '', '', $barcode, 0, 0, 1) > 0) {
            $result = $product;
        }

        return $result;
    }
    /**
     * 
     */
    public function getProductLot(int $productId, string $batchNumber): ?Productlot
    {
        $result = null;

        $productLot = new Productlot($this->db);
        if ($productLot->fetch(0, $productId, $batchNumber) > 0) {
            $result = $productLot;
        }

        return $result;
    }
    /**
     * 
     */
    public function sellProductLot(Productlot $productLot): void
    {
        $productLot->array_options['options_usedat'] = time();
        $productLot->update($this->user);
    }
}