add rename command

key.go

@@ -117,6 +117,15 @@ func (k *Key) Delete() error {
 	return k.secret.Remove()
 }
 
+func (k *Key) Rename(newName string) error {
+	err := k.secret.Rename(newName)
+	if err != nil {
+		return err
+	}
+	k.Name = newName
+	return nil
+}
+
 // func (this Key) MarshalJSON() ([]byte, error) {
 // 	m := map[string]interface{}{} // ideally use make with the right capacity
 // 	m["digits"] = this.Digits

main.go

@@ -36,6 +36,7 @@ Usage:
   two-factor-authenticator generate <name> [-c|--clip] [--verbose]
   two-factor-authenticator list [--verbose]
   two-factor-authenticator remove <name> [--verbose]
+  two-factor-authenticator rename <old-name> <new-name>
   two-factor-authenticator -h | --help
   two-factor-authenticator --version
 
@@ -154,6 +155,21 @@ func main() {
 		}
 		os.Exit(0)
 	}
+	if arguments["rename"].(bool) {
+		oldName := arguments["<old-name>"].(string)
+		newName := arguments["<new-name>"].(string)
+		if oldName == newName {
+			ui.Error("old-name and new-name are equal, aborting")
+			os.Exit(1)
+		}
+		err := rename(&ui, storage, oldName, newName)
+		if err != nil {
+			ui.Error(err.Error())
+			os.Exit(1)
+		}
+		ui.Info("Key renamed")
+		os.Exit(0)
+	}
 	if arguments["--version"].(bool) {
 		ui.Output(version)
 		os.Exit(0)
@@ -295,6 +311,24 @@ func remove(ui cli.Ui, storage Storage, name string) error {
 	return nil
 }
 
+func rename(ui cli.Ui, storage Storage, oldName string, newName string) error {
+	key := KeyFromStorage(storage, oldName)
+	key.Rename(newName)
+	marshal, _ := json.Marshal(key)
+	debugPrint(fmt.Sprintf("%s", marshal))
+
+	result, err := storage.AddKey(key.Name, []byte(marshal))
+	if err != nil {
+		return err
+	}
+	storage.RemoveKey(oldName)
+	if !result {
+		ui.Error("something went wrong adding key")
+		os.Exit(1)
+	}
+	return nil
+}
+
 func getDatabaseConfigurations() (databaseLocation, databaseFilename string) {
 	// first load fron env variable
 	dbPath, dbPathEnvPresent := os.LookupEnv("2FA_DB_PATH")

secret-string.go

@@ -62,3 +62,17 @@ func (s *SecretString) Value() ([]byte, error) {
 func (s *SecretString) Remove() error {
 	return s.ring.Remove(s.Name)
 }
+
+func (s *SecretString) Rename(name string) error {
+	data, err := s.Value()
+	if err != nil {
+		return err
+	}
+	s.Remove()
+	s.Name = name
+	err = s.Set(data)
+	if err != nil {
+		return err
+	}
+	return nil
+}