From d69767f5e97ea3428a185a2333bb9e793e20233f Mon Sep 17 00:00:00 2001
From: Leonid Nikitin <i@kor-elf.net>
Date: Fri, 30 May 2025 00:34:33 +0500
Subject: [PATCH] Remove bbolt database dependency

Replaced bbolt-based database handling with Fyne built-in preferences for storing application settings. Deleted migration logic, database initialization, and error handling related to bbolt, simplifying the codebase and reducing external dependencies.
---
 FyneApp.toml                           |   5 +-
 README.md                              |   1 -
 convertor/repository.go                |  24 ++++----
 convertor/view/conversion.go           |   7 +--
 data/.gitignore                        |   2 -
 db/db.go                               |   7 ---
 error/view.go                          |  38 +-----------
 go.mod                                 |   1 -
 go.sum                                 |   4 --
 handler/convertor.go                   |  18 +++---
 handler/main.go                        |   6 +-
 handler/menu.go                        |   7 +--
 images/screenshot-folder-structure.png | Bin 7544 -> 6871 bytes
 languages/active.en.toml               |   8 ---
 languages/active.kk.toml               |   8 ---
 languages/active.ru.toml               |   2 -
 localizer/repository.go                |   8 +--
 main.go                                |  64 ++------------------
 migration/migration.go                 |  12 ----
 setting/directory_for_saving.go        |   8 +--
 setting/entity.go                      |   4 +-
 setting/repository.go                  |  79 ++++++-------------------
 theme/repository.go                    |   8 +--
 theme/theme.go                         |   5 +-
 24 files changed, 67 insertions(+), 259 deletions(-)
 delete mode 100644 data/.gitignore
 delete mode 100644 db/db.go
 delete mode 100644 migration/migration.go

diff --git a/FyneApp.toml b/FyneApp.toml
index 1fe1f80..b30925b 100644
--- a/FyneApp.toml
+++ b/FyneApp.toml
@@ -3,7 +3,4 @@
   Name = "GUI for FFmpeg"
   ID = "net.kor-elf.projects.gui-for-ffmpeg"
   Version = "0.9.0"
-  Build = 4
-
-[Migrations]
-  fyneDo = true
\ No newline at end of file
+  Build = 11
diff --git a/README.md b/README.md
index 8f59d1f..1d3cc54 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,6 @@
 7. Создаться папка **fyne-cross/bin** и там будет созданна папка с тем названием под которую Вы компилировали приложения (linux-amd64 или windows-amd64).
 8. В папку **fyne-cross/bin/linux-amd64** или **fyne-cross/bin/windows-amd64** копируете:
    * icon.png
-   * data
    * languages
    * LICENSE
    * LICENSE-3RD-PARTY.txt
diff --git a/convertor/repository.go b/convertor/repository.go
index f751607..d052ff3 100644
--- a/convertor/repository.go
+++ b/convertor/repository.go
@@ -5,12 +5,12 @@ import (
 )
 
 type RepositoryContract interface {
-	GetPathFfmpeg() (string, error)
-	SavePathFfmpeg(code string) (setting.Setting, error)
-	GetPathFfprobe() (string, error)
-	SavePathFfprobe(code string) (setting.Setting, error)
-	GetPathFfplay() (string, error)
-	SavePathFfplay(code string) (setting.Setting, error)
+	GetPathFfmpeg() string
+	SavePathFfmpeg(code string) setting.Setting
+	GetPathFfprobe() string
+	SavePathFfprobe(code string) setting.Setting
+	GetPathFfplay() string
+	SavePathFfplay(code string) setting.Setting
 }
 
 type Repository struct {
@@ -21,26 +21,26 @@ func NewRepository(settingRepository setting.RepositoryContract) *Repository {
 	return &Repository{settingRepository: settingRepository}
 }
 
-func (r Repository) GetPathFfmpeg() (string, error) {
+func (r Repository) GetPathFfmpeg() string {
 	return r.settingRepository.GetValue("ffmpeg")
 }
 
-func (r Repository) SavePathFfmpeg(path string) (setting.Setting, error) {
+func (r Repository) SavePathFfmpeg(path string) setting.Setting {
 	return r.settingRepository.CreateOrUpdate("ffmpeg", path)
 }
 
-func (r Repository) GetPathFfprobe() (string, error) {
+func (r Repository) GetPathFfprobe() string {
 	return r.settingRepository.GetValue("ffprobe")
 }
 
-func (r Repository) SavePathFfprobe(path string) (setting.Setting, error) {
+func (r Repository) SavePathFfprobe(path string) setting.Setting {
 	return r.settingRepository.CreateOrUpdate("ffprobe", path)
 }
 
-func (r Repository) GetPathFfplay() (string, error) {
+func (r Repository) GetPathFfplay() string {
 	return r.settingRepository.GetValue("ffplay")
 }
 
-func (r Repository) SavePathFfplay(path string) (setting.Setting, error) {
+func (r Repository) SavePathFfplay(path string) setting.Setting {
 	return r.settingRepository.CreateOrUpdate("ffplay", path)
 }
diff --git a/convertor/view/conversion.go b/convertor/view/conversion.go
index 947a37c..7959bd9 100644
--- a/convertor/view/conversion.go
+++ b/convertor/view/conversion.go
@@ -353,7 +353,7 @@ func newDirectoryForSaving(app kernel.AppContract, settingDirectoryForSaving set
 			locationURI, err = storage.ListerForURI(r)
 
 			if err == nil {
-				_, _ = settingDirectoryForSaving.SaveDirectoryForSaving(locationURI.Path())
+				_ = settingDirectoryForSaving.SaveDirectoryForSaving(locationURI.Path())
 			}
 
 		}, locationURI)
@@ -363,10 +363,7 @@ func newDirectoryForSaving(app kernel.AppContract, settingDirectoryForSaving set
 }
 
 func getDirectoryForSaving(settingDirectoryForSaving setting.DirectoryForSavingContract) (fyne.ListableURI, error) {
-	path, err := settingDirectoryForSaving.GetDirectoryForSaving()
-	if err != nil {
-		return nil, err
-	}
+	path := settingDirectoryForSaving.GetDirectoryForSaving()
 
 	if len(path) > 0 {
 		path = "file://" + path
diff --git a/data/.gitignore b/data/.gitignore
deleted file mode 100644
index c96a04f..0000000
--- a/data/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-*
-!.gitignore
\ No newline at end of file
diff --git a/db/db.go b/db/db.go
deleted file mode 100644
index ce2ddf9..0000000
--- a/db/db.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package db
-
-import "errors"
-
-var (
-	ErrRecordNotFound = errors.New("record not found")
-)
diff --git a/error/view.go b/error/view.go
index 2d68856..50182e6 100644
--- a/error/view.go
+++ b/error/view.go
@@ -1,14 +1,12 @@
 package error
 
 import (
-	"errors"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/lang"
 	"fyne.io/fyne/v2/widget"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/kernel"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/localizer"
 	"github.com/nicksnyder/go-i18n/v2/i18n"
-	"go.etcd.io/bbolt"
 )
 
 type ViewContract interface {
@@ -37,17 +35,10 @@ func (v View) PanicError(err error) {
 		MessageID: "error",
 	})
 
-	messagetText := err.Error()
-	if errors.Is(err, bbolt.ErrTimeout) {
-		messagetText = v.app.GetLocalizerService().GetMessage(&i18n.LocalizeConfig{
-			MessageID: "errorDatabaseTimeout",
-		})
-	}
-
 	v.app.GetWindow().SetContent(container.NewBorder(
 		container.NewVBox(
 			widget.NewLabel(messageHead),
-			widget.NewLabel(messagetText),
+			widget.NewLabel(err.Error()),
 		),
 		nil,
 		nil,
@@ -57,30 +48,3 @@ func (v View) PanicError(err error) {
 		}),
 	))
 }
-
-func (v View) PanicErrorWriteDirectoryData() {
-	if v.isSetLanguage {
-		v.isSetLanguage = false
-		_ = v.app.GetLocalizerService().SetCurrentLanguageByCode(lang.SystemLocale().LanguageString())
-	}
-
-	message := v.app.GetLocalizerService().GetMessage(&i18n.LocalizeConfig{
-		MessageID: "errorDatabase",
-	})
-	messageHead := v.app.GetLocalizerService().GetMessage(&i18n.LocalizeConfig{
-		MessageID: "error",
-	})
-
-	v.app.GetWindow().SetContent(container.NewBorder(
-		container.NewVBox(
-			widget.NewLabel(messageHead),
-			widget.NewLabel(message),
-		),
-		nil,
-		nil,
-		nil,
-		localizer.LanguageSelectionForm(v.app.GetLocalizerService(), func(lang kernel.Lang) {
-			v.PanicErrorWriteDirectoryData()
-		}),
-	))
-}
diff --git a/go.mod b/go.mod
index 721120e..1bbe1ff 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,6 @@ require (
 	github.com/BurntSushi/toml v1.5.0
 	github.com/nicksnyder/go-i18n/v2 v2.6.0
 	github.com/ulikunitz/xz v0.5.12
-	go.etcd.io/bbolt v1.4.0
 	golang.org/x/image v0.27.0
 	golang.org/x/text v0.25.0
 )
diff --git a/go.sum b/go.sum
index 9db999c..2efe54d 100644
--- a/go.sum
+++ b/go.sum
@@ -67,14 +67,10 @@ github.com/ulikunitz/xz v0.5.12 h1:37Nm15o69RwBkXM0J6A5OlE67RZTfzUxTj8fB3dfcsc=
 github.com/ulikunitz/xz v0.5.12/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
 github.com/yuin/goldmark v1.7.11 h1:ZCxLyDMtz0nT2HFfsYG8WZ47Trip2+JyLysKcMYE5bo=
 github.com/yuin/goldmark v1.7.11/go.mod h1:ip/1k0VRfGynBgxOz0yCqHrbZXhcjxyuS66Brc7iBKg=
-go.etcd.io/bbolt v1.4.0 h1:TU77id3TnN/zKr7CO/uk+fBCwF2jGcMuw2B/FMAzYIk=
-go.etcd.io/bbolt v1.4.0/go.mod h1:AsD+OCi/qPN1giOX1aiLAha3o1U8rAz65bvN4j0sRuk=
 golang.org/x/image v0.27.0 h1:C8gA4oWU/tKkdCfYT6T2u4faJu3MeNS5O8UPWlPF61w=
 golang.org/x/image v0.27.0/go.mod h1:xbdrClrAUway1MUTEZDq9mz/UpRwYAkFFNUslZtcB+g=
 golang.org/x/net v0.40.0 h1:79Xs7wF06Gbdcg4kdCCIQArK11Z1hr5POQ6+fIYHNuY=
 golang.org/x/net v0.40.0/go.mod h1:y0hY0exeL2Pku80/zKK7tpntoX23cqL3Oa6njdgRtds=
-golang.org/x/sync v0.14.0 h1:woo0S4Yywslg6hp4eUFjTVOyKt0RookbpAHG4c1HmhQ=
-golang.org/x/sync v0.14.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
 golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/text v0.25.0 h1:qVyWApTSYLk/drJRO5mDlNYskwQznZmkpV2c8q9zls4=
diff --git a/handler/convertor.go b/handler/convertor.go
index a0cd29b..8643d35 100644
--- a/handler/convertor.go
+++ b/handler/convertor.go
@@ -61,9 +61,9 @@ func (h ConvertorHandler) MainConvertor() {
 }
 
 func (h ConvertorHandler) FfPathSelection() {
-	ffmpeg, _ := h.convertorRepository.GetPathFfmpeg()
-	ffprobe, _ := h.convertorRepository.GetPathFfprobe()
-	ffplay, _ := h.convertorRepository.GetPathFfplay()
+	ffmpeg := h.convertorRepository.GetPathFfmpeg()
+	ffprobe := h.convertorRepository.GetPathFfprobe()
+	ffplay := h.convertorRepository.GetPathFfplay()
 	h.convertorView.SelectFFPath(ffmpeg, ffprobe, ffplay, h.saveSettingFFPath, h.MainConvertor, h.downloadFFmpeg)
 }
 
@@ -122,9 +122,9 @@ func (h ConvertorHandler) checkingFFPathUtilities() bool {
 		if ffplayChecking == false {
 			continue
 		}
-		_, _ = h.convertorRepository.SavePathFfmpeg(item.FFmpeg)
-		_, _ = h.convertorRepository.SavePathFfprobe(item.FFprobe)
-		_, _ = h.convertorRepository.SavePathFfplay(item.FFplay)
+		_ = h.convertorRepository.SavePathFfmpeg(item.FFmpeg)
+		_ = h.convertorRepository.SavePathFfprobe(item.FFprobe)
+		_ = h.convertorRepository.SavePathFfplay(item.FFplay)
 		return true
 	}
 
@@ -156,9 +156,9 @@ func (h ConvertorHandler) saveSettingFFPath(ffmpegPath string, ffprobePath strin
 		return errors.New(errorText)
 	}
 
-	_, _ = h.convertorRepository.SavePathFfmpeg(ffmpegPath)
-	_, _ = h.convertorRepository.SavePathFfprobe(ffprobePath)
-	_, _ = h.convertorRepository.SavePathFfplay(ffplayPath)
+	_ = h.convertorRepository.SavePathFfmpeg(ffmpegPath)
+	_ = h.convertorRepository.SavePathFfprobe(ffprobePath)
+	_ = h.convertorRepository.SavePathFfplay(ffplayPath)
 
 	h.MainConvertor()
 
diff --git a/handler/main.go b/handler/main.go
index 0e97c6f..e8a669b 100644
--- a/handler/main.go
+++ b/handler/main.go
@@ -28,9 +28,9 @@ func NewMainHandler(
 }
 
 func (h MainHandler) Start() {
-	language, err := h.localizerRepository.GetCode()
-	if err != nil {
-		err = h.app.GetLocalizerService().SetCurrentLanguageByCode(lang.SystemLocale().LanguageString())
+	language := h.localizerRepository.GetCode()
+	if len(language) == 0 {
+		err := h.app.GetLocalizerService().SetCurrentLanguageByCode(lang.SystemLocale().LanguageString())
 		if err != nil {
 			h.menuHandler.LanguageSelection()
 			return
diff --git a/handler/menu.go b/handler/menu.go
index fa32d8b..7bc8b87 100644
--- a/handler/menu.go
+++ b/handler/menu.go
@@ -143,7 +143,7 @@ func (h MenuHandler) openAbout() {
 
 func (h MenuHandler) LanguageSelection() {
 	h.localizerView.LanguageSelection(func(lang kernel.Lang) {
-		_, _ = h.localizerRepository.Save(lang.Code)
+		_ = h.localizerRepository.Save(lang.Code)
 		h.convertorHandler.MainConvertor()
 	})
 }
@@ -154,10 +154,7 @@ func (h MenuHandler) settingsSelection() {
 		if err != nil {
 			return err
 		}
-		_, err = h.localizerRepository.Save(setting.Language.Code)
-		if err != nil {
-			return err
-		}
+		_ = h.localizerRepository.Save(setting.Language.Code)
 
 		err = h.themeService.SetCurrentTheme(setting.ThemeInfo)
 		if err != nil {
diff --git a/images/screenshot-folder-structure.png b/images/screenshot-folder-structure.png
index 19b2a3f82e9d0cf9f703136e7340762f5c41fb49..1e29071ac4a6242718a6b0381ecbbd6502454028 100644
GIT binary patch
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diff --git a/languages/active.en.toml b/languages/active.en.toml
index c5c158d..a9ab0bc 100644
--- a/languages/active.en.toml
+++ b/languages/active.en.toml
@@ -230,14 +230,6 @@ other = "An error has occurred!"
 hash = "sha1-55ebddceddb8b044e33cc3893ec2eba7bbd9fcf9"
 other = "Couldn't convert video"
 
-[errorDatabase]
-hash = "sha1-531abc3f0d12727e542df6e5a22de91098380fc1"
-other = "could not create file 'database' in folder 'data'"
-
-[errorDatabaseTimeout]
-hash = "sha1-f8153516ac2442d19be4b6daccce839d204ff09f"
-other = "Could not open configuration file.\nMake sure another copy of the program is not running!"
-
 [errorDragAndDropFile]
 hash = "sha1-863cf1ad9c820d5b0c2006ceeaa29e25f81c1714"
 other = "Not all files were added"
diff --git a/languages/active.kk.toml b/languages/active.kk.toml
index 2074652..100be4c 100644
--- a/languages/active.kk.toml
+++ b/languages/active.kk.toml
@@ -230,14 +230,6 @@ other = "Қате орын алды!"
 hash = "sha1-55ebddceddb8b044e33cc3893ec2eba7bbd9fcf9"
 other = "Бейнені түрлендіру мүмкін болмады"
 
-[errorDatabase]
-hash = "sha1-531abc3f0d12727e542df6e5a22de91098380fc1"
-other = "'data' қалтасында 'database' файлын жасау мүмкін болмады"
-
-[errorDatabaseTimeout]
-hash = "sha1-f8153516ac2442d19be4b6daccce839d204ff09f"
-other = "Конфигурация файлын аша алмады.\nБағдарламаның басқа көшірмесі іске қосылмағанына көз жеткізіңіз!"
-
 [errorDragAndDropFile]
 hash = "sha1-863cf1ad9c820d5b0c2006ceeaa29e25f81c1714"
 other = "Барлық файлдар қосылмаған"
diff --git a/languages/active.ru.toml b/languages/active.ru.toml
index 2383c00..0609a33 100644
--- a/languages/active.ru.toml
+++ b/languages/active.ru.toml
@@ -56,8 +56,6 @@ encoder_wmv2 = "Windows Media Video 8"
 encoder_xbm = "XBM (X BitMap) image"
 error = "Произошла ошибка!"
 errorConverter = "не смогли отконвертировать видео"
-errorDatabase = "не смогли создать файл 'database' в папке 'data'"
-errorDatabaseTimeout = "Не смогли открыть файл конфигурации.\nУбедитесь, что другая копия программы не запущена!"
 errorDragAndDropFile = "Не все файлы добавились"
 errorFFmpeg = "это не FFmpeg"
 errorFFmpegVersion = "Не смогли определить версию FFmpeg"
diff --git a/localizer/repository.go b/localizer/repository.go
index 46e36f2..eed9051 100644
--- a/localizer/repository.go
+++ b/localizer/repository.go
@@ -5,8 +5,8 @@ import (
 )
 
 type RepositoryContract interface {
-	GetCode() (string, error)
-	Save(code string) (setting.Setting, error)
+	GetCode() string
+	Save(code string) setting.Setting
 }
 
 type Repository struct {
@@ -17,10 +17,10 @@ func NewRepository(settingRepository setting.RepositoryContract) *Repository {
 	return &Repository{settingRepository: settingRepository}
 }
 
-func (r Repository) GetCode() (string, error) {
+func (r Repository) GetCode() string {
 	return r.settingRepository.GetValue("language")
 }
 
-func (r Repository) Save(code string) (setting.Setting, error) {
+func (r Repository) Save(code string) setting.Setting {
 	return r.settingRepository.CreateOrUpdate("language", code)
 }
diff --git a/main.go b/main.go
index 5f30405..38c2315 100644
--- a/main.go
+++ b/main.go
@@ -1,22 +1,16 @@
 package main
 
 import (
-	"errors"
 	"fyne.io/fyne/v2"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/convertor"
-	dberror "git.kor-elf.net/kor-elf/gui-for-ffmpeg/db"
 	error2 "git.kor-elf.net/kor-elf/gui-for-ffmpeg/error"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/handler"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/kernel"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/localizer"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/menu"
-	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/migration"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/setting"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/theme"
-	"go.etcd.io/bbolt"
 	"golang.org/x/text/language"
-	"os"
-	"time"
 )
 
 var application kernel.AppContract
@@ -53,55 +47,14 @@ func init() {
 
 func main() {
 	errorView := error2.NewView(application)
-	if canCreateFile("data/database.db") != true {
-		errorView.PanicErrorWriteDirectoryData()
-		application.GetWindow().ShowAndRun()
-		return
-	}
 
-	db, err := bbolt.Open("data/database.db", 0600, &bbolt.Options{Timeout: 3 * time.Second})
-	if err != nil {
-		errorView.PanicError(err)
-		application.GetWindow().ShowAndRun()
-		return
-	}
-
-	defer db.Close()
-
-	err = migration.Run(db)
-	if err != nil {
-		errorView.PanicError(err)
-		application.GetWindow().ShowAndRun()
-		return
-	}
-
-	settingRepository := setting.NewRepository(db)
+	settingRepository := setting.NewRepository(application.GetAppFyne())
 	settingDirectoryForSaving := setting.NewSettingDirectoryForSaving(settingRepository)
 
 	convertorRepository := convertor.NewRepository(settingRepository)
-	pathFFmpeg, err := convertorRepository.GetPathFfmpeg()
-	if err != nil && errors.Is(err, dberror.ErrRecordNotFound) == false {
-		errorView.PanicError(err)
-		application.GetWindow().ShowAndRun()
-		return
-	}
-	ffPathUtilities.FFmpeg = pathFFmpeg
-
-	pathFFprobe, err := convertorRepository.GetPathFfprobe()
-	if err != nil && errors.Is(err, dberror.ErrRecordNotFound) == false {
-		errorView.PanicError(err)
-		application.GetWindow().ShowAndRun()
-		return
-	}
-	ffPathUtilities.FFprobe = pathFFprobe
-
-	pathFFplay, err := convertorRepository.GetPathFfplay()
-	if err != nil && errors.Is(err, dberror.ErrRecordNotFound) == false {
-		errorView.PanicError(err)
-		application.GetWindow().ShowAndRun()
-		return
-	}
-	ffPathUtilities.FFplay = pathFFplay
+	ffPathUtilities.FFmpeg = convertorRepository.GetPathFfmpeg()
+	ffPathUtilities.FFprobe = convertorRepository.GetPathFfprobe()
+	ffPathUtilities.FFplay = convertorRepository.GetPathFfplay()
 
 	application.RunConvertor()
 	defer application.AfterClosing()
@@ -129,12 +82,3 @@ func main() {
 	application.GetWindow().SetMainMenu(mainMenu.GetMainMenu())
 	application.GetWindow().ShowAndRun()
 }
-
-func canCreateFile(path string) bool {
-	file, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0666)
-	if err != nil {
-		return false
-	}
-	_ = file.Close()
-	return true
-}
diff --git a/migration/migration.go b/migration/migration.go
deleted file mode 100644
index 39af7af..0000000
--- a/migration/migration.go
+++ /dev/null
@@ -1,12 +0,0 @@
-package migration
-
-import (
-	"go.etcd.io/bbolt"
-)
-
-func Run(db *bbolt.DB) error {
-	return db.Update(func(tx *bbolt.Tx) error {
-		_, err := tx.CreateBucketIfNotExists([]byte("settings"))
-		return err
-	})
-}
diff --git a/setting/directory_for_saving.go b/setting/directory_for_saving.go
index 706560a..c77fde5 100644
--- a/setting/directory_for_saving.go
+++ b/setting/directory_for_saving.go
@@ -1,8 +1,8 @@
 package setting
 
 type DirectoryForSavingContract interface {
-	GetDirectoryForSaving() (string, error)
-	SaveDirectoryForSaving(path string) (Setting, error)
+	GetDirectoryForSaving() string
+	SaveDirectoryForSaving(path string) Setting
 }
 
 type DirectoryForSaving struct {
@@ -13,10 +13,10 @@ func NewSettingDirectoryForSaving(settingRepository RepositoryContract) *Directo
 	return &DirectoryForSaving{settingRepository: settingRepository}
 }
 
-func (setting DirectoryForSaving) GetDirectoryForSaving() (string, error) {
+func (setting DirectoryForSaving) GetDirectoryForSaving() string {
 	return setting.settingRepository.GetValue("directoryForSaving")
 }
 
-func (setting DirectoryForSaving) SaveDirectoryForSaving(path string) (Setting, error) {
+func (setting DirectoryForSaving) SaveDirectoryForSaving(path string) Setting {
 	return setting.settingRepository.CreateOrUpdate("directoryForSaving", path)
 }
diff --git a/setting/entity.go b/setting/entity.go
index e3c18f3..d0c8384 100644
--- a/setting/entity.go
+++ b/setting/entity.go
@@ -1,6 +1,6 @@
 package setting
 
 type Setting struct {
-	Code  string `json:"code"`
-	Value string `json:"value"`
+	Code  string
+	Value string
 }
diff --git a/setting/repository.go b/setting/repository.go
index 9f2f671..9365670 100644
--- a/setting/repository.go
+++ b/setting/repository.go
@@ -1,82 +1,39 @@
 package setting
 
 import (
-	"encoding/json"
-	"errors"
-	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/db"
-	"go.etcd.io/bbolt"
+	"fyne.io/fyne/v2"
 )
 
 type RepositoryContract interface {
-	Create(setting Setting) (Setting, error)
-	CreateOrUpdate(code string, value string) (Setting, error)
-	GetValue(code string) (value string, err error)
+	Create(setting Setting) Setting
+	CreateOrUpdate(code string, value string) Setting
+	GetValue(code string) string
 }
 
 type Repository struct {
-	db *bbolt.DB
+	app fyne.App
 }
 
-func NewRepository(db *bbolt.DB) *Repository {
-	return &Repository{db}
-}
-
-func (r Repository) GetValue(code string) (value string, err error) {
-	var setting Setting
-
-	err = r.db.View(func(tx *bbolt.Tx) error {
-		b := tx.Bucket([]byte("settings"))
-		if b == nil {
-			return errors.New("bucket 'settings' not found")
-		}
-		val := b.Get([]byte(code))
-		if val == nil {
-			return db.ErrRecordNotFound
-		}
-		return json.Unmarshal(val, &setting)
-	})
-	if err != nil {
-		return "", err
+func NewRepository(app fyne.App) *Repository {
+	return &Repository{
+		app: app,
 	}
-
-	return setting.Value, nil
-
 }
 
-func (r Repository) Create(setting Setting) (Setting, error) {
-	err := r.db.Update(func(tx *bbolt.Tx) error {
-		b := tx.Bucket([]byte("settings"))
-		if b == nil {
-			return errors.New("bucket 'settings' not found")
-		}
-
-		data, err := json.Marshal(setting)
-		if err != nil {
-			return err
-		}
-
-		return b.Put([]byte(setting.Code), data)
-	})
-	return setting, err
+func (r Repository) GetValue(code string) string {
+	return r.app.Preferences().String(code)
 }
 
-func (r Repository) CreateOrUpdate(code string, value string) (Setting, error) {
+func (r Repository) Create(setting Setting) Setting {
+	r.app.Preferences().SetString(setting.Code, setting.Value)
+	return setting
+}
+
+func (r Repository) CreateOrUpdate(code string, value string) Setting {
 	var setting Setting
 	setting.Code = code
 	setting.Value = value
 
-	err := r.db.Update(func(tx *bbolt.Tx) error {
-		b := tx.Bucket([]byte("settings"))
-		if b == nil {
-			return errors.New("bucket 'settings' not found")
-		}
-
-		data, err := json.Marshal(setting)
-		if err != nil {
-			return err
-		}
-
-		return b.Put([]byte(code), data)
-	})
-	return setting, err
+	r.app.Preferences().SetString(code, value)
+	return setting
 }
diff --git a/theme/repository.go b/theme/repository.go
index 91b2351..797527b 100644
--- a/theme/repository.go
+++ b/theme/repository.go
@@ -4,7 +4,7 @@ import "git.kor-elf.net/kor-elf/gui-for-ffmpeg/setting"
 
 type RepositoryContract interface {
 	GetCode() string
-	Save(code string) (setting.Setting, error)
+	Save(code string) setting.Setting
 }
 
 type Repository struct {
@@ -16,13 +16,13 @@ func NewRepository(settingRepository setting.RepositoryContract) *Repository {
 }
 
 func (r Repository) GetCode() string {
-	name, err := r.settingRepository.GetValue("theme")
-	if err != nil {
+	name := r.settingRepository.GetValue("theme")
+	if len(name) == 0 {
 		return "default"
 	}
 	return name
 }
 
-func (r Repository) Save(code string) (setting.Setting, error) {
+func (r Repository) Save(code string) setting.Setting {
 	return r.settingRepository.CreateOrUpdate("theme", code)
 }
diff --git a/theme/theme.go b/theme/theme.go
index ba0dfa0..2c87899 100644
--- a/theme/theme.go
+++ b/theme/theme.go
@@ -55,10 +55,7 @@ func (t theme) List() map[string]ThemeInfoContract {
 }
 
 func (t theme) SetCurrentTheme(themeInfo ThemeInfoContract) error {
-	_, err := t.repository.Save(themeInfo.GetName())
-	if err != nil {
-		return err
-	}
+	_ = t.repository.Save(themeInfo.GetName())
 
 	if themeInfo.GetName() == "default" {
 		t.app.GetAppFyne().Settings().SetTheme(fyneTheme.DefaultTheme())