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kvs.go
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kvs.go
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// 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 settings
import (
"io/ioutil"
"strconv"
"sync"
"github.com/ghodss/yaml"
"github.com/sirupsen/logrus"
)
type keyValueStore struct {
cache map[string]string
path string
lock *sync.RWMutex
}
// newKeyValueStore returns loaded preferences.
func newKeyValueStore(path string) *keyValueStore {
p := &keyValueStore{
path: path,
lock: &sync.RWMutex{},
}
if err := p.load(); err != nil {
logrus.WithError(err).Warn("Cannot load preferences file, using defaults")
}
return p
}
func (p *keyValueStore) load() error {
if p.cache != nil {
return nil
}
p.lock.Lock()
defer p.lock.Unlock()
p.cache = map[string]string{}
data, err := ioutil.ReadFile(p.path)
if err != nil {
return err
}
if len(data) == 0 {
return nil
}
return yaml.Unmarshal(data, &p.cache)
}
func (p *keyValueStore) setDefault(key, value string) {
if p.Get(key) == "" {
p.set(key, value)
}
}
func (p *keyValueStore) Get(key string) string {
p.lock.RLock()
defer p.lock.RUnlock()
return p.cache[key]
}
func (p *keyValueStore) GetBool(key string) bool {
return p.Get(key) == "true"
}
func (p *keyValueStore) GetInt(key string) int {
if p.Get(key) == "" {
return 0
}
value, err := strconv.Atoi(p.Get(key))
if err != nil {
logrus.WithError(err).Error("Cannot parse int")
}
return value
}
func (p *keyValueStore) GetFloat64(key string) float64 {
if p.Get(key) == "" {
return 0
}
value, err := strconv.ParseFloat(p.Get(key), 64)
if err != nil {
logrus.WithError(err).Error("Cannot parse float64")
}
return value
}
func (p *keyValueStore) set(key, value string) {
p.lock.Lock()
p.cache[key] = value
p.lock.Unlock()
}