Maint: use loopstate for httpproxy

internal/httpproxy/state/settings.go

@@ -0,0 +1,55 @@
+package state
+
+import (
+	"context"
+	"reflect"
+
+	"github.com/qdm12/gluetun/internal/configuration"
+	"github.com/qdm12/gluetun/internal/constants"
+)
+
+type SettingsGetterSetter interface {
+	SettingsGetter
+	SettingsSetter
+}
+
+type SettingsGetter interface {
+	GetSettings() (settings configuration.HTTPProxy)
+}
+
+func (s *State) GetSettings() (settings configuration.HTTPProxy) {
+	s.settingsMu.RLock()
+	defer s.settingsMu.RUnlock()
+	return s.settings
+}
+
+type SettingsSetter interface {
+	SetSettings(ctx context.Context,
+		settings configuration.HTTPProxy) (outcome string)
+}
+
+func (s *State) SetSettings(ctx context.Context,
+	settings configuration.HTTPProxy) (outcome string) {
+	s.settingsMu.Lock()
+	settingsUnchanged := reflect.DeepEqual(settings, s.settings)
+	if settingsUnchanged {
+		s.settingsMu.Unlock()
+		return "settings left unchanged"
+	}
+	newEnabled := settings.Enabled
+	previousEnabled := s.settings.Enabled
+	s.settings = settings
+	s.settingsMu.Unlock()
+	// Either restart or set changed status
+	switch {
+	case !newEnabled && !previousEnabled:
+	case newEnabled && previousEnabled:
+		_, _ = s.statusApplier.ApplyStatus(ctx, constants.Stopped)
+		_, _ = s.statusApplier.ApplyStatus(ctx, constants.Running)
+	case newEnabled && !previousEnabled:
+		_, _ = s.statusApplier.ApplyStatus(ctx, constants.Running)
+	case !newEnabled && previousEnabled:
+		_, _ = s.statusApplier.ApplyStatus(ctx, constants.Stopped)
+	}
+	return "settings updated"
+}