How to organize a mailing list for a 1C-Bitrix event?

Question

1C-Bitrix

There are actually two questions: 1. Is it possible to automatically generate a newsletter after publishing an article on the site. 2. Is it possible to subscribe to a new article only for a specific subsection or subsections, but not all articles in the general Articles section.
1C-Bitrix has a Subscription and mailings module. In the settings, it is possible to send a letter according to a schedule, at a certain time, day of the week, date, by event, no. I think to use this module, the only thing is not clear how to fasten the sending on the event of adding an article / news on the site.

Answer 1

// создаем обработчик события "OnAfterIBlockElementAdd"
AddEventHandler("iblock", "OnAfterIBlockElementAdd", "OnAfterIBlockElementAddCustom");

function OnAfterIBlockElementAddCustom(&$arFields)
{
    //todo: здесь сделать проверку на нужный ИБ
    CModule::IncludeModule('subscribe');
    $posting = new CPosting;
    $postingFields = array(
        'STATUS' => 'D',
        'DIRECT_SEND' => 'Y',
        'FROM_FIELD' => '[email protected]',
        'SUBJECT' => 'Рассылка',
        'BODY' => 'Проверка связи',
        'BODY_TYPE' => 'html',
        'CHARSET' => 'UTF-8'
    );
    $ID = $posting->Add($postingFields);
    if ($ID == false) {
        AddMessage2Log($posting->LAST_ERROR);
    }
}

More details here https://dev.1c-bitrix.ru/api_help/subscribe/classe...

Answer 2

This is achieved by modifications and events:
OnAfterIBlockElementAdd
https://dev.1c-bitrix.ru/api_help/iblock/events/on...
CEvent::Send
https://dev.1c-bitrix.ru/api_help/main/reference /c...