Make group navigation controller-driven

appstate/state.go

@@ -597,6 +597,30 @@ func (s *State) MoveSelectedEntry(path []string) error {
 	return nil
 }
 
+func (s *State) DeleteCurrentGroup() error {
+	session, ok := s.Session.(MutableSession)
+	if !ok {
+		return fmt.Errorf("session is not mutable")
+	}
+
+	model, err := session.Current()
+	if err != nil {
+		return err
+	}
+
+	if err := model.DeleteGroup(s.CurrentPath); err != nil {
+		return err
+	}
+
+	session.Replace(model)
+	if len(s.CurrentPath) > 0 {
+		s.CurrentPath = append([]string(nil), s.CurrentPath[:len(s.CurrentPath)-1]...)
+	}
+	s.SelectedEntryID = ""
+	s.Dirty = true
+	return nil
+}
+
 func (s *State) AddAttachmentToSelectedEntry(name string, content []byte) error {
 	session, ok := s.Session.(MutableSession)
 	if !ok {

appstate/state_test.go

@@ -967,6 +967,38 @@ func TestRenameCurrentGroupUpdatesPathAndMarksDirty(t *testing.T) {
 	}
 }
 
+func TestDeleteCurrentGroupRemovesItNavigatesToParentAndMarksDirty(t *testing.T) {
+	t.Parallel()
+
+	model := testVaultModel()
+	model.CreateGroup([]string{"Root"}, "Finance")
+	sess := &mutableStubSession{model: model}
+	state := State{
+		Session:     sess,
+		CurrentPath: []string{"Root", "Finance"},
+	}
+
+	if err := state.DeleteCurrentGroup(); err != nil {
+		t.Fatalf("DeleteCurrentGroup() error = %v", err)
+	}
+
+	if !slices.Equal(state.CurrentPath, []string{"Root"}) {
+		t.Fatalf("CurrentPath = %v, want [Root]", state.CurrentPath)
+	}
+
+	got, err := state.ChildGroups()
+	if err != nil {
+		t.Fatalf("ChildGroups() error = %v", err)
+	}
+
+	if !slices.Equal(got, []string{"Home Assistant", "Internet"}) {
+		t.Fatalf("ChildGroups() = %v, want [Home Assistant Internet]", got)
+	}
+	if !state.Dirty {
+		t.Fatal("Dirty = false, want true after DeleteCurrentGroup")
+	}
+}
+
 func TestMoveSelectedEntryPersistsPathChangeAndMarksDirty(t *testing.T) {
 	t.Parallel()