RFC: attachments

[mtymek]

I'd like to introduce support for e-mail attachments. This is how message creation could look like:

$message = $mailService->compose(
      array('to' => 'johndoe@domain.com'),       // headers
      'mail/welcome.phtml',                                // template name
      array('userName' => 'JohnDoe'),              // variables passed to Zend\View
      array(
           'invoice.pdf' => new FileAttachment('data/invoice.pdf')
      )
);

Problem is that at this moment MtMail can only generate single-part, or "multipart/alternate" messages. In this case, we'd need Mime message similar to this one:

- multipart/mixed
    - text/html - message body
    - attachment

or, for alternate text:

- multipart/mixed
    - multipart/alternat
        - text/plain - plaintext body
        - text/html - html body
    - attachment

This would probably require backwards-incompatible changes to the MailComposer service.

Ideas are welcome :-)

ping @ojhaujjwal

[ojhaujjwal]

+1 about attachments. In addition to that, we may also create a template interface like AttachmentsProviderInterface if it is useful.

namespace MtMail\Template;

interface AttachmentsProviderInterface extends TemplateInterface
{
    /**
     * @return array
     */
    public function getAttachments();
}