forked from Silverfish/proton-bridge
128 lines
2.6 KiB
Go
128 lines
2.6 KiB
Go
// Copyright (c) 2021 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 config
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import (
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"encoding/json"
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"errors"
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"os"
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"strconv"
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"sync"
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)
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type Preferences struct {
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cache map[string]string
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path string
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lock *sync.RWMutex
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}
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// NewPreferences returns loaded preferences.
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func NewPreferences(preferencesPath string) *Preferences {
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p := &Preferences{
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path: preferencesPath,
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lock: &sync.RWMutex{},
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}
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if err := p.load(); err != nil {
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log.Warn("Cannot load preferences: ", err)
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}
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return p
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}
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func (p *Preferences) load() error {
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if p.cache != nil {
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return nil
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}
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p.lock.Lock()
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defer p.lock.Unlock()
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p.cache = map[string]string{}
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f, err := os.Open(p.path)
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if err != nil {
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return err
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}
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defer f.Close() //nolint[errcheck]
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return json.NewDecoder(f).Decode(&p.cache)
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}
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func (p *Preferences) save() error {
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if p.cache == nil {
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return errors.New("cannot save preferences: cache is nil")
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}
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p.lock.Lock()
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defer p.lock.Unlock()
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f, err := os.Create(p.path)
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if err != nil {
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return err
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}
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defer f.Close() //nolint[errcheck]
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return json.NewEncoder(f).Encode(p.cache)
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}
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func (p *Preferences) SetDefault(key, value string) {
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if p.Get(key) == "" {
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p.Set(key, value)
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}
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}
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func (p *Preferences) Get(key string) string {
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p.lock.RLock()
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defer p.lock.RUnlock()
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return p.cache[key]
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}
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func (p *Preferences) GetBool(key string) bool {
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return p.Get(key) == "true"
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}
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func (p *Preferences) GetInt(key string) int {
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value, err := strconv.Atoi(p.Get(key))
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if err != nil {
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log.Error("Cannot parse int: ", err)
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}
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return value
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}
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func (p *Preferences) Set(key, value string) {
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p.lock.Lock()
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p.cache[key] = value
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p.lock.Unlock()
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if err := p.save(); err != nil {
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log.Warn("Cannot save preferences: ", err)
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}
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}
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func (p *Preferences) SetBool(key string, value bool) {
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if value {
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p.Set(key, "true")
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} else {
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p.Set(key, "false")
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}
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}
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func (p *Preferences) SetInt(key string, value int) {
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p.Set(key, strconv.Itoa(value))
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}
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