mirror of
https://github.com/ProtonMail/proton-bridge.git
synced 2026-02-04 08:18:34 +00:00
133 lines
3.5 KiB
Go
133 lines
3.5 KiB
Go
// Copyright (c) 2026 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 unleash
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import (
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"context"
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"encoding/json"
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"os"
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"path/filepath"
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"github.com/Masterminds/semver/v3"
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"github.com/ProtonMail/go-proton-api"
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"github.com/ProtonMail/proton-bridge/v3/internal/constants"
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"github.com/google/uuid"
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"github.com/sirupsen/logrus"
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)
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const startupCacheFilename = "unleash_startup_flags.json"
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var logger = logrus.WithField("pkg", "unleash-startup") //nolint:gochecknoglobals
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type FeatureFlagStartupStore map[string]bool
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func (f FeatureFlagStartupStore) GetFlagValue(key string) bool {
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val, ok := f[key]
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if !ok {
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return false
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}
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return val
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}
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func newAPIOptions(
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apiURL string,
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version *semver.Version,
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) []proton.Option {
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return []proton.Option{
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proton.WithHostURL(apiURL),
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proton.WithAppVersion(constants.AppVersion(version.Original())),
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proton.WithLogger(logrus.WithField("pkg", "gpa/unleash-startup")),
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proton.WithRetryCount(0),
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}
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}
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func readStartupCacheFile(filepath string) (map[string]bool, error) {
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ffStore := make(map[string]bool)
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if filepath == "" {
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return ffStore, nil
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}
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file, err := os.Open(filepath) //nolint:gosec
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if err != nil {
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return ffStore, err
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}
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defer func(file *os.File) {
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if err := file.Close(); err != nil {
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logger.WithError(err).Error("Unable to close cache file after read")
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}
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}(file)
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if err := json.NewDecoder(file).Decode(&ffStore); err != nil {
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return ffStore, err
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}
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return ffStore, nil
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}
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func saveStartupCacheFile(ffStore map[string]bool, filepath string) error {
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if filepath == "" {
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return nil
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}
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file, err := os.Create(filepath) //nolint:gosec
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if err != nil {
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return err
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}
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defer func(file *os.File) {
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if err := file.Close(); err != nil {
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logger.WithError(err).Error("Unable to close cache file after write")
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}
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}(file)
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if err := json.NewEncoder(file).Encode(ffStore); err != nil {
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return err
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}
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return nil
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}
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func GetStartupFeatureFlagsAndStore(apiURL string, curVersion *semver.Version, unleashCachePathProvider func() (string, error)) map[string]bool {
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var cacheFilepath string
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cacheDir, err := unleashCachePathProvider()
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if err != nil {
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logger.WithError(err).Warn("Unable to obtain feature flag cache filepath")
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} else {
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cacheFilepath = filepath.Clean(filepath.Join(cacheDir, startupCacheFilename))
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}
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ffStore, err := readStartupCacheFile(cacheFilepath)
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if err != nil {
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logger.WithError(err).Warn("An issue occurred when reading the cache file")
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}
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manager := proton.New(newAPIOptions(apiURL, curVersion)...)
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featureFlagResult, err := manager.GetFeatures(context.Background(), uuid.New())
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if err == nil {
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ffStore = readResponseData(featureFlagResult)
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} else {
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logger.WithError(err).Warn("Failed to obtain feature flags from API")
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}
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if err := saveStartupCacheFile(ffStore, cacheFilepath); err != nil {
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logger.WithError(err).Warn("An issue occurred when saving the cache file")
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}
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return ffStore
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}
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