feat(migrate): support migrate data to another storage

app/migrate/backup.go

@@ -1,4 +1,4 @@
-package archive
+package migrate
 
 import (
 	"context"

app/migrate/migrate.go

@@ -0,0 +1,44 @@
+package migrate
+
+import (
+	"context"
+
+	"github.com/AlecAivazis/survey/v2"
+	"github.com/fatih/color"
+	"github.com/go-faster/errors"
+
+	"github.com/iyear/tdl/pkg/kv"
+)
+
+func Migrate(ctx context.Context, to map[string]string) error {
+	meta, err := kv.From(ctx).MigrateTo()
+	if err != nil {
+		return errors.Wrap(err, "read data")
+	}
+
+	dest, err := kv.NewWithMap(to)
+	if err != nil {
+		return errors.Wrap(err, "create dest storage")
+	}
+
+	var confirm bool
+	if err = survey.AskOne(&survey.Confirm{
+		Message: "It will overwrite the namespace data in the destination storage, continue?",
+		Default: false,
+	}, &confirm); err != nil {
+		return errors.Wrap(err, "confirm")
+	}
+	if !confirm {
+		return nil
+	}
+
+	if err = dest.MigrateFrom(meta); err != nil {
+		return errors.Wrap(err, "migrate from")
+	}
+
+	color.Green("Migrate successfully.")
+	for ns := range meta {
+		color.Green(" - %s", ns)
+	}
+	return nil
+}

app/migrate/recover.go

@@ -1,4 +1,4 @@
-package archive
+package migrate
 
 import (
 	"bytes"

cmd/migrate.go

@@ -2,11 +2,13 @@ package cmd
 
 import (
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/spf13/cobra"
 
-	"github.com/iyear/tdl/app/archive"
+	"github.com/iyear/tdl/app/migrate"
+	"github.com/iyear/tdl/pkg/kv"
 )
 
 func NewBackup() *cobra.Command {
@@ -20,7 +22,7 @@ func NewBackup() *cobra.Command {
 				dst = fmt.Sprintf("%s.backup.tdl", time.Now().Format("2006-01-02-15_04_05"))
 			}
 
-			return archive.Backup(cmd.Context(), dst)
+			return migrate.Backup(cmd.Context(), dst)
 		},
 	}
 
@@ -36,7 +38,7 @@ func NewRecover() *cobra.Command {
 		Use:   "recover",
 		Short: "Recover your data",
 		RunE: func(cmd *cobra.Command, args []string) error {
-			return archive.Recover(cmd.Context(), file)
+			return migrate.Recover(cmd.Context(), file)
 		},
 	}
 
@@ -50,3 +52,21 @@ func NewRecover() *cobra.Command {
 
 	return cmd
 }
+
+func NewMigrate() *cobra.Command {
+	var to map[string]string
+
+	cmd := &cobra.Command{
+		Use:   "migrate",
+		Short: "Migrate your current data to another storage",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return migrate.Migrate(cmd.Context(), to)
+		},
+	}
+
+	cmd.Flags().StringToStringVar(&to, "to", map[string]string{},
+		fmt.Sprintf("destination storage options, format: type=driver,key1=value1,key2=value2. Available drivers: [%s]",
+			strings.Join(kv.DriverNames(), ",")))
+
+	return cmd
+}

cmd/root.go

@@ -21,8 +21,6 @@ import (
 )
 
 func New() *cobra.Command {
-	driverTypeKey := "type"
-
 	cmd := &cobra.Command{
 		Use:           "tdl",
 		Short:         "Telegram Downloader, but more than a downloader",
@@ -43,19 +41,7 @@ func New() *cobra.Command {
 					zap.String("namespace", ns))
 			}
 
-			// check storage flag
-			storageOpts := viper.GetStringMapString(consts.FlagStorage)
-			driver, err := kv.ParseDriver(storageOpts[driverTypeKey])
-			if err != nil {
-				return errors.Wrap(err, "parse driver")
-			}
-			delete(storageOpts, driverTypeKey)
-
-			opts := make(map[string]any)
-			for k, v := range storageOpts {
-				opts[k] = v
-			}
-			storage, err := kv.New(driver, opts)
+			storage, err := kv.NewWithMap(viper.GetStringMapString(consts.FlagStorage))
 			if err != nil {
 				return errors.Wrap(err, "create kv storage")
 			}
@@ -72,11 +58,11 @@ func New() *cobra.Command {
 	}
 
 	cmd.AddCommand(NewVersion(), NewLogin(), NewDownload(), NewForward(),
-		NewChat(), NewUpload(), NewBackup(), NewRecover(), NewGen())
+		NewChat(), NewUpload(), NewBackup(), NewRecover(), NewMigrate(), NewGen())
 
 	cmd.PersistentFlags().StringToString(consts.FlagStorage, map[string]string{
-		driverTypeKey: kv.DriverLegacy.String(),
-		"path":        consts.KVPath,
+		kv.DriverTypeKey: kv.DriverLegacy.String(),
+		"path":           consts.KVPath,
 	}, fmt.Sprintf("storage options, format: type=driver,key1=value1,key2=value2. Available drivers: [%s]",
 		strings.Join(kv.DriverNames(), ",")))
 

pkg/kv/kv.go

@@ -13,6 +13,8 @@ import (
 // ENUM(legacy, bolt, file)
 type Driver string
 
+const DriverTypeKey = "type"
+
 var ErrNotFound = errors.New("key not found")
 
 type Meta map[string]map[string][]byte // namespace, key, value
@@ -46,6 +48,21 @@ func New(driver Driver, opts map[string]any) (Storage, error) {
 	return nil, errors.Errorf("unsupported driver: %s", driver)
 }
 
+func NewWithMap(o map[string]string) (Storage, error) {
+	driver, err := ParseDriver(o[DriverTypeKey])
+	if err != nil {
+		return nil, errors.Wrap(err, "parse driver")
+	}
+	delete(o, DriverTypeKey)
+
+	opts := make(map[string]any)
+	for k, v := range o {
+		opts[k] = v
+	}
+
+	return New(driver, opts)
+}
+
 type ctxKey struct{}
 
 func With(ctx context.Context, kv Storage) context.Context {