ansible-home-assistant/configuration/automations/home-music.yaml

- id: ra-music-bathroom-arrive
  alias: '[RA] Bathroom arrive'
  mode: single
  trigger:
    - platform: state
      entity_id: sensor.przemyslaws_apple_watch_room_presence
      to: ra-bathroom
  condition:
    - condition: or
      conditions:
        - condition: state
          entity_id: media_player.bedroom
          state: playing
  action:
    - service: sonos.join
      data:
        master: media_player.bedroom
        entity_id: media_player.bathroom

- id: ra-music-bathroom-leave
  alias: '[RA] Bathroom leave'
  mode: single
  trigger:
    - platform: state
      entity_id: sensor.przemyslaws_apple_watch_room_presence
      from: ra-bathroom
      for: '0:01:00'
  condition:
    - condition: or
      conditions:
        - condition: state
          entity_id: media_player.bathroom
          state: playing
  action:
    - choose:
        - conditions:
            - condition: state
              entity_id: media_player.bedroom
              state: playing
          sequence:
            - service: sonos.join
              data:
                master: media_player.bedroom
    - service: sonos.unjoin
      data:
        entity_id: media_player.bathroom

- id: ra-music-bedroom-arrive
  alias: '[RA] Bedroom arrive'
  mode: single
  trigger:
    - platform: state
      entity_id: sensor.przemyslaws_apple_watch_room_presence
      to: ra-bedroom
  condition:
    - condition: or
      conditions:
        - condition: state
          entity_id: media_player.bathroom
          state: playing
  action:
    - service: sonos.join
      data:
        master: media_player.bathroom
        entity_id: media_player.bedroom

- id: ra-music-bedroom-leave
  alias: '[RA] Bedroom leave'
  mode: single
  trigger:
    - platform: state
      entity_id: sensor.przemyslaws_apple_watch_room_presence
      from: ra-bedroom
      for: '0:01:00'
  condition:
    - condition: or
      conditions:
        - condition: state
          entity_id: media_player.bedroom
          state: playing
  action:
    - choose:
        - conditions:
            - condition: state
              entity_id: media_player.bathroom
              state: playing
          sequence:
            - service: sonos.join
              data:
                master: media_player.bathroom
    - service: sonos.unjoin
      data:
        entity_id: media_player.bedroom