How to track the subscription event for an out-of-stock item in 1C-Bitrix?

Question

1C-Bitrix

At this stage, on the detailed product page there is a subscription component "bitrix:catalog.product.subscribe" , the task is to send a promotional code to the mail when subscribing to the missing one. How it is better to implement it?

Answer 1

$eventManager = \Bitrix\Main\EventManager::getInstance();
$eventManager->addEventHandler('catalog', '\Bitrix\Catalog\Subscribe::onAfterAdd', ['СatalogEvents', 'onAfterAddSubscribe']);

Create a letter template, send it in an event