Styjun

In magento 2.2.7 when AddToCart button is clicked i need to
validate Delivery Postcode field.Only if the customer enter the
correct post code the product should added to the cart.

The Delivery Postcode is a separate extension. Inside the extension
i wrote before plugin (using beforeAddProduct class)and try to get
the postcode parameter but i am unable to do so, but i can able to
get the product related parameter.For ex. product quantity i can
able get. Can you please guide me how to get the postcode value
inside the plugin?

Extension Folder structure :https://www.screencast.com/t/AP1nr6cPkWvn

My template code :https://www.screencast.com/t/sEFZ0rUM

My plugin code

/**
 * @var MagentoFrameworkAppRequestHttp
 */
protected $request;

/**
 * @var MagePrashantCheckDeliveryHelperData
 */
protected $helper;

/**
 * @var MagentoFrameworkMessageManagerInterface
 */
protected $message;

/**
 * Plugin constructor.
 *
 * @param MagentoCheckoutModelSession $checkoutSession
 * @param MagentoFrameworkAppRequestHttp $request
 * @param MagePrashantCheckDeliveryHelperData $helper
 * @param MagentoFrameworkMessageManagerInterface $message
 */
public function __construct(
 MagentoCheckoutModelSession $checkoutSession,
 MagentoFrameworkAppRequestHttp $request,
 MagePrashantCheckDeliveryHelperData $helper,
 MagentoFrameworkMessageManagerInterface $message 

) 
 $this->quote = $checkoutSession->getQuote();
 $this->request = $request;
 $this->helper = $helper;
 $this->message = $message; 


/**
 * beforeAddProduct
 *
 * @param $subject
 * @param $productInfo
 * @param null $requestInfo
 *
 * @return array
 * @throws LocalizedException
 */
public function beforeAddProduct($subject, $productInfo, $requestInfo = null)
 
 $postcode = $this->request->getParam('postcode');
 print_r($postcode); 
 //Null
 print_r($this->request->getParams()); 
 //Array ( [uenc] => aHR0cDovLzEyNy4wLjAuMS9QZXRzeS9wZWRpZ3JlZS1wdXBweS1taWxrLWFuZC12ZWdldGFibGUuaHRtbA,, [product] => 59 [selected_configurable_option] => [related_product] => [item] => 59 [form_key] => BIYNJmVlffX0A95H [super_attribute] => Array ( [140] => 10 ) [qty] => 1 )

 

}