mirror of
https://github.com/ProtonMail/proton-bridge.git
synced 2025-12-10 04:36:43 +00:00
140 lines
3.2 KiB
Go
140 lines
3.2 KiB
Go
// 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 imap
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
// Cache keys.
|
|
const (
|
|
SubscriptionException = "subscription_exceptions"
|
|
)
|
|
|
|
// addToCache adds item to existing item list.
|
|
// Starting from following structure:
|
|
//
|
|
// {
|
|
// "username": {"label": "item1;item2"}
|
|
// }
|
|
//
|
|
// After calling addToCache("username", "label", "newItem") we get:
|
|
//
|
|
// {
|
|
// "username": {"label": "item1;item2;newItem"}
|
|
// }
|
|
func (ib *imapBackend) addToCache(userID, label, toAdd string) {
|
|
list := ib.getCacheList(userID, label)
|
|
|
|
if list != "" {
|
|
list = list + ";" + toAdd
|
|
} else {
|
|
list = toAdd
|
|
}
|
|
|
|
ib.imapCacheLock.Lock()
|
|
ib.imapCache[userID][label] = list
|
|
ib.imapCacheLock.Unlock()
|
|
|
|
if err := ib.saveIMAPCache(); err != nil {
|
|
log.Info("Backend/userinfo: could not save cache: ", err)
|
|
}
|
|
}
|
|
|
|
func (ib *imapBackend) removeFromCache(userID, label, toRemove string) {
|
|
list := ib.getCacheList(userID, label)
|
|
|
|
split := strings.Split(list, ";")
|
|
|
|
for i, item := range split {
|
|
if item == toRemove {
|
|
split = append(split[:i], split[i+1:]...)
|
|
}
|
|
}
|
|
|
|
ib.imapCacheLock.Lock()
|
|
ib.imapCache[userID][label] = strings.Join(split, ";")
|
|
ib.imapCacheLock.Unlock()
|
|
|
|
if err := ib.saveIMAPCache(); err != nil {
|
|
log.Info("Backend/userinfo: could not save cache: ", err)
|
|
}
|
|
}
|
|
|
|
func (ib *imapBackend) getCacheList(userID, label string) (list string) {
|
|
if err := ib.loadIMAPCache(); err != nil {
|
|
log.WithError(err).Warn("Could not load cache")
|
|
}
|
|
|
|
ib.imapCacheLock.Lock()
|
|
if ib.imapCache == nil {
|
|
ib.imapCache = map[string]map[string]string{}
|
|
}
|
|
|
|
if ib.imapCache[userID] == nil {
|
|
ib.imapCache[userID] = map[string]string{}
|
|
ib.imapCache[userID][SubscriptionException] = ""
|
|
}
|
|
|
|
list = ib.imapCache[userID][label]
|
|
|
|
ib.imapCacheLock.Unlock()
|
|
|
|
if err := ib.saveIMAPCache(); err != nil {
|
|
log.WithError(err).Warn("Could not save cache")
|
|
}
|
|
return
|
|
}
|
|
|
|
func (ib *imapBackend) loadIMAPCache() error {
|
|
if ib.imapCache != nil {
|
|
return nil
|
|
}
|
|
|
|
ib.imapCacheLock.Lock()
|
|
defer ib.imapCacheLock.Unlock()
|
|
|
|
f, err := os.Open(ib.imapCachePath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close() //nolint:errcheck,gosec
|
|
|
|
return json.NewDecoder(f).Decode(&ib.imapCache)
|
|
}
|
|
|
|
func (ib *imapBackend) saveIMAPCache() error {
|
|
if ib.imapCache == nil {
|
|
return errors.New("cannot save cache: cache is nil")
|
|
}
|
|
|
|
ib.imapCacheLock.Lock()
|
|
defer ib.imapCacheLock.Unlock()
|
|
|
|
f, err := os.Create(ib.imapCachePath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close() //nolint:errcheck,gosec
|
|
|
|
return json.NewEncoder(f).Encode(ib.imapCache)
|
|
}
|