HA - Times opened, like History stats but without time

times_opened.yaml

template:
  - trigger:
      - platform: state
        entity_id: input_boolean.test_bool_1
        to: "on"
      - platform: event
        event_type: custom_reset_times_opened
      - platform: event
        event_type: event_template_reloaded
    sensor:
      - name: times_opened
        state: |
          {% set current = this.state | int(0) if this is defined else 0 %}
          {% if trigger.id == 'reset' %}
            0
          {% else %}          
            {{ current + 1 }}
          {% endif %}