Building a Custom Magento 2 Module: From Architecture to Deployment

Magento 2 Interceptor Plugin Implementation

<?php
namespace Modracx\CustomCatalog\Plugin;

use Magento\Catalog\Api\ProductRepositoryInterface;
use Magento\Catalog\Api\Data\ProductInterface;

class ProductSavePlugin
{
    public function beforeSave(
        ProductRepositoryInterface $subject,
        ProductInterface $product
    ) {
        // Intercept product save to normalize custom attributes
        if (!$product->getCustomAttribute('seo_slug')) {
            $slug = strtolower(trim(preg_replace('/[^A-Za-z0-9-]+/', '-', $product->getName())));
            $product->setCustomAttribute('seo_slug', $slug);
        }
        return [$product];
    }
}