/
envelope.go
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/
envelope.go
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// Copyright (c) 2021 Proton Technologies AG
//
// This file is part of ProtonMail Bridge.
//
// ProtonMail Bridge is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// ProtonMail Bridge is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
package message
import (
"net/mail"
"net/textproto"
"strings"
"github.com/ProtonMail/proton-bridge/pkg/pmapi"
"github.com/emersion/go-imap"
)
// GetEnvelope will prepare envelope from pmapi message and cached header.
func GetEnvelope(msg *pmapi.Message, header textproto.MIMEHeader) *imap.Envelope {
hdr := toMessageHeader(mail.Header(header))
setMessageIDIfNeeded(msg, &hdr)
return &imap.Envelope{
Date: SanitizeMessageDate(msg.Time),
Subject: msg.Subject,
From: getAddresses([]*mail.Address{msg.Sender}),
Sender: getAddresses([]*mail.Address{msg.Sender}),
ReplyTo: getAddresses(msg.ReplyTos),
To: getAddresses(msg.ToList),
Cc: getAddresses(msg.CCList),
Bcc: getAddresses(msg.BCCList),
InReplyTo: hdr.Get("In-Reply-To"),
MessageId: hdr.Get("Message-Id"),
}
}
func getAddresses(addrs []*mail.Address) (imapAddrs []*imap.Address) {
for _, a := range addrs {
if a == nil {
continue
}
parts := strings.SplitN(a.Address, "@", 2)
if len(parts) != 2 {
continue
}
imapAddrs = append(imapAddrs, &imap.Address{
PersonalName: a.Name,
MailboxName: parts[0],
HostName: parts[1],
})
}
return
}