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package backendutil
import (
"net/mail"
"strings"
"github.com/emersion/go-imap"
"github.com/emersion/go-message/textproto"
)
func headerAddressList(value string) ([]*imap.Address, error) {
addrs, err := mail.ParseAddressList(value)
if err != nil {
return []*imap.Address{}, err
}
list := make([]*imap.Address, len(addrs))
for i, a := range addrs {
parts := strings.SplitN(a.Address, "@", 2)
mailbox := parts[0]
var hostname string
if len(parts) == 2 {
hostname = parts[1]
}
list[i] = &imap.Address{
PersonalName: a.Name,
MailboxName: mailbox,
HostName: hostname,
}
}
return list, err
}
// FetchEnvelope returns a message's envelope from its header.
func FetchEnvelope(h textproto.Header) (*imap.Envelope, error) {
env := new(imap.Envelope)
env.Date, _ = mail.ParseDate(h.Get("Date"))
env.Subject = h.Get("Subject")
env.From, _ = headerAddressList(h.Get("From"))
env.Sender, _ = headerAddressList(h.Get("Sender"))
if len(env.Sender) == 0 {
env.Sender = env.From
}
env.ReplyTo, _ = headerAddressList(h.Get("Reply-To"))
if len(env.ReplyTo) == 0 {
env.ReplyTo = env.From
}
env.To, _ = headerAddressList(h.Get("To"))
env.Cc, _ = headerAddressList(h.Get("Cc"))
env.Bcc, _ = headerAddressList(h.Get("Bcc"))
env.InReplyTo = h.Get("In-Reply-To")
env.MessageId = h.Get("Message-Id")
return env, nil
}
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