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68 lines
2.1 KiB
68 lines
2.1 KiB
// Copyright (c) 2022 Proton AG |
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// |
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// This file is part of Proton Mail Bridge. |
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// |
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// Proton Mail 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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// Proton Mail 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 Proton Mail 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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