You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
138 lines
3.2 KiB
138 lines
3.2 KiB
// Copyright (c) 2022 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 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] |
|
|
|
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] |
|
|
|
return json.NewEncoder(f).Encode(ib.imapCache) |
|
}
|
|
|