Centralize app state ownership in controller

appstate/state.go

@@ -75,6 +75,35 @@ type State struct {
 	SearchQuery     string
 	SelectedEntryID string
 	Dirty           bool
+	StatusMessage   string
+	ErrorMessage    string
+}
+
+func (s *State) ShowSection(section Section) {
+	s.Section = section
+	s.CurrentPath = nil
+	s.SelectedEntryID = ""
+}
+
+func (s *State) SetSearchQuery(query string) {
+	s.SearchQuery = query
+}
+
+func (s *State) BeginNewEntry() {
+	s.SelectedEntryID = ""
+	s.StatusMessage = "new entry form ready"
+	s.ErrorMessage = ""
+}
+
+func (s *State) SetActionResult(label string, err error) {
+	if err != nil {
+		s.ErrorMessage = err.Error()
+		s.StatusMessage = ""
+		return
+	}
+
+	s.ErrorMessage = ""
+	s.StatusMessage = label + " complete"
 }
 
 func (s *State) VisibleEntries() ([]vault.Entry, error) {
@@ -467,6 +496,28 @@ func (s *State) NavigateToPath(path []string) {
 	s.SelectedEntryID = ""
 }
 
+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.Dirty = true
+	return nil
+}
+
 func (s *State) Save() error {
 	session, ok := s.Session.(SaveableSession)
 	if !ok {