state_example: notes viewlogic

notes.viewlogic.dart

// We create a "logic ref", which will store a reference to NotesViewLogic.
final notesViewLogicRef = LogicRef((scope) => NotesViewLogic(scope));

class NotesViewLogic with Logic {
  const NotesViewLogic(this.scope);

  @override
  final Scope scope;

  void addNote() {
    var state = read(notesRef);
    write(notesRef,
        state.copyWith(notes: state.notes.concat(state.input), input: ''));
  }

  void updateInput(String input) =>
      write(notesRef, read(notesRef).copyWith(input: input));
}