mirror of
https://github.com/ProtonMail/proton-bridge.git
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69 lines
2.2 KiB
Go
69 lines
2.2 KiB
Go
// Copyright (c) 2020 Proton Technologies AG
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//
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// This file is part of ProtonMail Bridge.
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//
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// ProtonMail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// ProtonMail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package store
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import bolt "go.etcd.io/bbolt"
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const (
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versionKey = "version"
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// versionOffset makes it possible to force email client to reload all
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// mailboxes. If increased during application update it will trigger
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// the reload on client side without needing to sync DB or re-setup account.
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versionOffset = uint32(3)
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)
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func (store *Store) getMailboxesVersion() uint32 {
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localVersion := store.readMailboxesVersion()
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// If a read error occurs it returns 0 which is an invalid version value.
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if localVersion == 0 {
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localVersion = 1
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_ = store.writeMailboxesVersion(localVersion)
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}
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// versionOffset will make email clients reload if increased during bridge update.
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return localVersion + versionOffset
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}
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func (store *Store) increaseMailboxesVersion() error {
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ver := store.readMailboxesVersion()
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// The version is zero if a read error occurred. Operation ++ will make it 1
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// which is default starting value.
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ver++
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return store.writeMailboxesVersion(ver)
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}
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func (store *Store) readMailboxesVersion() (version uint32) {
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_ = store.db.View(func(tx *bolt.Tx) (err error) {
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b := tx.Bucket(mboxVersionBucket)
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verRaw := b.Get([]byte(versionKey))
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if verRaw != nil {
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version = btoi(verRaw)
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}
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return nil
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})
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return
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}
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func (store *Store) writeMailboxesVersion(ver uint32) error {
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return store.db.Update(func(tx *bolt.Tx) (err error) {
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b := tx.Bucket(mboxVersionBucket)
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return b.Put([]byte(versionKey), itob(ver))
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})
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}
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