How to hook into the email sending process with events

If you write your own extensions, you can hook into the email sending process with the following events:

• fooman_emailattachments_before_send_order
• fooman_emailattachments_before_send_order_comment

• fooman_emailattachments_before_send_invoice
• fooman_emailattachments_before_send_invoice_comment

• fooman_emailattachments_before_send_shipment
• fooman_emailattachments_before_send_shipment_comment

• fooman_emailattachments_before_send_creditmemo
• fooman_emailattachments_before_send_creditmemo_comment

The dispatch call looks like this:

$this->eventManager->dispatch(

   'fooman_emailattachments_before_send_order',

   [

       'attachment_container' => $this->attachmentContainer,

       'order'                => $order

   ]

);