def do_prev_note(state):
notes = state['cache']['notes']
current_note_id = state['ui_state']['current_note_id']
if current_note_id is None or not note_list.contains(notes, current_note_id):
select_last()
previous_note_id = note_list.previous_note_id(notes, current_note_id)
if previous_note_id is not None:
return load_note(previous_note_id)
def do_next_note(state):
notes = state['cache']['notes']
current_note_id = state['ui_state']['current_note_id']
if current_note_id is None or not note_list.contains(notes, current_note_id):
select_first()
next_note_id = note_list.next_note_id(notes, current_note_id)
if next_note_id:
return load_note(next_note_id)
