The very basic client app, not adapted for mobiles.

client/internal/services/core/options/options.go

@@ -0,0 +1,88 @@
+package options
+
+import (
+	"fmt"
+
+	"bunker/client/internal/application"
+	"bunker/client/internal/services/core"
+	"bunker/client/internal/services/core/options/models"
+)
+
+var _ = core.Options(&options{})
+
+type options struct {
+	app        *application.Application
+	db         core.Database
+	mainWindow core.MainWindow
+
+	widgets      map[string]*models.OptionPane
+	widgetsItems []string // для рисования списка Fyne.
+}
+
+// Initialize инициализирует сервис.
+func Initialize(app *application.Application) error {
+	opts := &options{
+		app: app,
+	}
+
+	if err := app.RegisterService(opts); err != nil {
+		return fmt.Errorf("%w: %w", core.ErrOptions, err)
+	}
+
+	return nil
+}
+
+func (o *options) Configure() error {
+	if err := o.registerMigrations(); err != nil {
+		return fmt.Errorf("configure: %w", err)
+	}
+
+	return nil
+}
+
+func (o *options) ConnectDependencies() error {
+	databaseRaw := o.app.Service(core.ServiceNameDatabase)
+	if databaseRaw == nil {
+		return fmt.Errorf("connect dependencies: get database service: %w", application.ErrServiceNotFound)
+	}
+
+	database, valid := databaseRaw.(core.Database)
+	if !valid {
+		return fmt.Errorf("connect dependencies: type assert database service: %w", core.ErrDatabaseIsInvalid)
+	}
+
+	o.db = database
+
+	mainWindowRaw := o.app.Service(core.ServiceNameMainWindow)
+	if mainWindowRaw == nil {
+		return fmt.Errorf("connect dependencies: get main window: %w", application.ErrServiceNotFound)
+	}
+
+	mainWindow, valid := mainWindowRaw.(core.MainWindow)
+	if !valid {
+		return fmt.Errorf("connect dependencies: type assert main window: %w", core.ErrMainWindowIsInvalid)
+	}
+
+	o.mainWindow = mainWindow
+
+	return nil
+}
+
+func (o *options) Initialize() error {
+	o.widgets = make(map[string]*models.OptionPane)
+	o.widgetsItems = make([]string, 0)
+
+	return nil
+}
+
+func (o *options) Name() string {
+	return core.ServiceNameOptions
+}
+
+func (o *options) LaunchStartupTasks() error {
+	return nil
+}
+
+func (o *options) Shutdown() error {
+	return nil
+}