We build too many walls and not enough bridges

pkg/message/address.go

@@ -0,0 +1,56 @@
+// Copyright (c) 2020 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"
+	"strings"
+
+	"github.com/emersion/go-imap"
+)
+
+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
+}
+
+func formatAddressList(addrs []*mail.Address) (s string) {
+	for i, addr := range addrs {
+		if i > 0 {
+			s += ", "
+		}
+		s += addr.String()
+	}
+	return
+}