// Convert the email into an array of messages grouped by host suitable for
// delivery to the mail queue.
func (e *Email) Messages(s *queue.Storage) ([]*queue.Message, error) {
from, err := mail.ParseAddress(mime.QEncoding.Encode("utf-8", e.From))
if err != nil {
return nil, err
}
w, body, err := s.NewBody()
if err != nil {
return nil, err
}
mpWriter := multipart.NewWriter(w)
if err := e.writeHeaders(w, body, mpWriter.Boundary()); err != nil {
return nil, err
}
if err := e.writeBody(mpWriter); err != nil {
return nil, err
}
for _, a := range e.Attachments {
if err := a.Write(mpWriter); err != nil {
return nil, err
}
}
if err := mpWriter.Close(); err != nil {
return nil, err
}
if err := w.Close(); err != nil {
return nil, err
}
return e.newMessages(s, from.Address, body)
}
// Create an array of messages with the specified body.
func (e *Email) newMessages(s *queue.Storage, from, body string) ([]*queue.Message, error) {
addresses := append(append(e.To, e.Cc...), e.Bcc...)
m, err := GroupAddressesByHost(addresses)
if err != nil {
return nil, err
}
messages := make([]*queue.Message, 0, 1)
for h, to := range m {
msg := &queue.Message{
Host: h,
From: from,
To: to,
}
if err := s.SaveMessage(msg, body); err != nil {
return nil, err
}
messages = append(messages, msg)
}
return messages, nil
}