GODT-2034: Basic vault migration ability (proof of concept)

internal/vault/migrate_v2.3.x.go

@@ -0,0 +1,90 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail 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.
+//
+// Proton Mail 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 Proton Mail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package vault
+
+import (
+	"strconv"
+
+	"github.com/bradenaw/juniper/xslices"
+	"github.com/vmihailenco/msgpack/v5"
+)
+
+type Data_2_3_x struct {
+	Settings Settings_2_3_x
+	Users    []UserData_2_3_x
+}
+
+func (data Data_2_3_x) migrate() Data_2_4_x {
+	return Data_2_4_x{
+		Settings: data.Settings.migrate(),
+		Users:    xslices.Map(data.Users, func(user UserData_2_3_x) UserData_2_4_x { return user.migrate() }),
+	}
+}
+
+type Settings_2_3_x struct {
+	GluonDir string
+
+	IMAPPort string
+	SMTPPort string
+}
+
+func (settings Settings_2_3_x) migrate() Settings_2_4_x {
+	imapPort, err := strconv.Atoi(settings.IMAPPort)
+	if err != nil {
+		panic(err)
+	}
+
+	smtpPort, err := strconv.Atoi(settings.SMTPPort)
+	if err != nil {
+		panic(err)
+	}
+
+	return Settings_2_4_x{
+		GluonDir: settings.GluonDir,
+
+		IMAPPort: imapPort,
+		SMTPPort: smtpPort,
+	}
+}
+
+type UserData_2_3_x struct {
+	ID   string
+	Name string
+
+	GluonKey  []byte
+	SplitMode bool
+}
+
+func (user UserData_2_3_x) migrate() UserData_2_4_x {
+	return UserData_2_4_x{
+		UserID:    user.ID,
+		Username:  user.Name,
+		GluonKey:  string(user.GluonKey),
+		SplitMode: user.SplitMode,
+	}
+}
+
+func upgrade_2_3_x(b []byte) ([]byte, error) {
+	var old Data_2_3_x
+
+	if err := msgpack.Unmarshal(b, &old); err != nil {
+		return nil, err
+	}
+
+	return msgpack.Marshal(old.migrate())
+}