forked from Silverfish/proton-bridge
f3c69faf8b
* Renaming GUI, CLI, no-impact config. * License header and documentation rebranding. * Rename app title and vendor. Impact: manual install * Migrating mac keychain and launch on startup. * Fix linter and linter renaming
117 lines
2.7 KiB
Go
117 lines
2.7 KiB
Go
// 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 (
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"encoding/json"
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"os"
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"sync"
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"github.com/pkg/errors"
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)
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// Events caches the last event IDs for all accounts (there should be only one instance).
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type Events struct {
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// eventMap is map from userID => key (such as last event) => value (such as event ID).
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eventMap map[string]map[string]string
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path string
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lock *sync.RWMutex
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}
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// NewEvents constructs a new event cache at the given path.
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func NewEvents(path string) *Events {
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return &Events{
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path: path,
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lock: &sync.RWMutex{},
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}
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}
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func (c *Events) getEventID(userID string) string {
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c.lock.Lock()
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defer c.lock.Unlock()
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if err := c.loadEvents(); err != nil {
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log.WithError(err).Warn("Problem to load store events")
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}
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if c.eventMap == nil {
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c.eventMap = map[string]map[string]string{}
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}
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if c.eventMap[userID] == nil {
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c.eventMap[userID] = map[string]string{}
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}
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return c.eventMap[userID]["events"]
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}
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func (c *Events) setEventID(userID, eventID string) error {
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c.lock.Lock()
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defer c.lock.Unlock()
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if c.eventMap[userID] == nil {
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c.eventMap[userID] = map[string]string{}
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}
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c.eventMap[userID]["events"] = eventID
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return c.saveEvents()
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}
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func (c *Events) loadEvents() error {
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if c.eventMap != nil {
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return nil
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}
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f, err := os.Open(c.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,gosec
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return json.NewDecoder(f).Decode(&c.eventMap)
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}
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func (c *Events) saveEvents() error {
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if c.eventMap == nil {
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return errors.New("events: cannot save events: events map is nil")
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}
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f, err := os.Create(c.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,gosec
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return json.NewEncoder(f).Encode(c.eventMap)
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}
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func (c *Events) clearUserEvents(userID string) error {
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c.lock.Lock()
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defer c.lock.Unlock()
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if c.eventMap == nil {
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log.WithField("user", userID).Warning("Cannot clear user events: event map is nil")
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return nil
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}
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log.WithField("user", userID).Trace("Removing user events from event loop")
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delete(c.eventMap, userID)
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return c.saveEvents()
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}
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