Maint: loopstate package used in Openvpn state

internal/openvpn/state/settings.go

@@ -0,0 +1,35 @@
+package state
+
+import (
+	"context"
+	"reflect"
+
+	"github.com/qdm12/gluetun/internal/configuration"
+	"github.com/qdm12/gluetun/internal/constants"
+)
+
+type SettingsGetterSetter interface {
+	GetSettings() (settings configuration.OpenVPN)
+	SetSettings(ctx context.Context, settings configuration.OpenVPN) (
+		outcome string)
+}
+
+func (s *State) GetSettings() (settings configuration.OpenVPN) {
+	s.settingsMu.RLock()
+	defer s.settingsMu.RUnlock()
+	return s.settings
+}
+
+func (s *State) SetSettings(ctx context.Context, settings configuration.OpenVPN) (
+	outcome string) {
+	s.settingsMu.Lock()
+	defer s.settingsMu.Unlock()
+	settingsUnchanged := reflect.DeepEqual(s.settings, settings)
+	if settingsUnchanged {
+		return "settings left unchanged"
+	}
+	s.settings = settings
+	_, _ = s.statusApplier.ApplyStatus(ctx, constants.Stopped)
+	outcome, _ = s.statusApplier.ApplyStatus(ctx, constants.Running)
+	return outcome
+}