/
app.go
100 lines (82 loc) · 3.12 KB
/
app.go
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package app
import (
"fmt"
"github.com/syndtr/goleveldb/leveldb"
"golang.org/x/oauth2"
"github.com/gphotosuploader/gphotos-uploader-cli/internal/config"
"github.com/gphotosuploader/gphotos-uploader-cli/internal/datastore/completeduploads"
"github.com/gphotosuploader/gphotos-uploader-cli/internal/datastore/leveldbstore"
"github.com/gphotosuploader/gphotos-uploader-cli/internal/datastore/tokenstore"
"github.com/gphotosuploader/gphotos-uploader-cli/internal/log"
)
// App represents a running application with all the dependant services.
type App struct {
FileTracker FileTracker
TokenManager TokenManager
UploadTracker UploadTracker
Logger log.Logger
}
// Start initializes the application with the services defined by a given configuration.
func Start(cfg *config.Config) (*App, error) {
app := &App{}
// Initialize the logger
app.Logger = log.GetInstance()
// Use LevelDB to track already uploaded files
ft, err := leveldb.OpenFile(cfg.CompletedUploadsDBDir(), nil)
if err != nil {
return app, fmt.Errorf("open completed uploads tracker failed: path=%s, err=%s", cfg.CompletedUploadsDBDir(), err)
}
app.FileTracker = completeduploads.NewService(completeduploads.NewLevelDBRepository(ft))
// Use Keyring to store / read secrets
kr, err := tokenstore.NewKeyringRepository(cfg.SecretsBackendType, nil, cfg.KeyringDir())
if err != nil {
return app, fmt.Errorf("open token manager failed: type=%s, err=%s", cfg.SecretsBackendType, err)
}
app.TokenManager = tokenstore.New(kr)
// Upload session tracker to keep upload session to resume uploads.
app.UploadTracker, err = leveldbstore.NewStore(cfg.ResumableUploadsDBDir())
if err != nil {
return app, fmt.Errorf("open resumable uploads tracker failed: path=%s, err=%s", cfg.ResumableUploadsDBDir(), err)
}
return app, nil
}
// Stop stops the application releasing all service resources.
func (app *App) Stop() error {
// Close already uploaded file tracker
app.Logger.Debug("Shutting down File Tracker service...")
if err := app.FileTracker.Close(); err != nil {
return err
}
// Close upload session tracker
app.Logger.Debug("Shutting down Upload Tracker service...")
if err := app.UploadTracker.Close(); err != nil {
return err
}
// Close token manager
app.Logger.Debug("Shutting down Token Manager service...")
if err := app.TokenManager.Close(); err != nil {
return err
}
app.Logger.Debug("All services has been shut down successfully")
return nil
}
// FileTracker represents a service to track file already uploaded.
type FileTracker interface {
CacheAsAlreadyUploaded(filePath string) error
IsAlreadyUploaded(filePath string) (bool, error)
RemoveAsAlreadyUploaded(filePath string) error
Close() error
}
// TokenManager represents a service to keep and read secrets (like passwords, tokens...)
type TokenManager interface {
StoreToken(email string, token *oauth2.Token) error
RetrieveToken(email string) (*oauth2.Token, error)
Close() error
}
// UploadTracker represents a service to keep resumable upload sessions.
type UploadTracker interface {
Get(fingerprint string) []byte
Set(fingerprint string, url []byte)
Delete(fingerprint string)
Close() error
}