Cannot get pause/seek/current_position_template/media_duration_template working

[slyoldfox]

I am trying to create a media player card for the spotify native interface on macOS.
All scripts locally are working (and also through the shell_command api in HA).

The sensors all seems to have decent values and are populated through the command line sensor https://www.home-assistant.io/integrations/sensor.command_line/)

My current config is:

  - platform: media_player_template
    media_players:
      receiver:
        friendly_name: Receiver
        device_class: receiver
        current_volume_template: "{{ states('sensor.current_spotify_volume') }}"
        current_position_template: "{{ states('sensor.current_spotify_song_position') }}"
        media_duration_template: "{{ states('sensor.current_spotify_song_duration') }}"
        title_template: "{{ states('sensor.current_spotify_song') }}"
        #availability_template: "{{ states('sensor.current_spotify_availability') }}"
        #album_template: "album template"
        #artist_template: "artist template"
        value_template: >
          {% if is_state("switch.local_spotify", "on") -%}
            on
          {%- else -%}
            off
          {%- endif %}
        next:
          service: shell_command.spotify_next
        previous:
          service: shell_command.spotify_previous
        play:
          service: shell_command.spotify_play
        pause:
          service: shell_command.spotify_pause
        seek:
          service: shell_command.spotify_set_position
          data_template:
            position: "{{position}}"
        set_volume:
          service: shell_command.spotify_volume
          data_template:
            volume: "{{volume}}"
        stop:
          service: switch.turn_off
          data_template:
            entity_id: switch.local_spotify
        turn_on:
          service: switch.turn_on
          data_template:
            entity_id: switch.local_spotify
        turn_off:
          service: switch.turn_off
          data_template:
            entity_id: switch.local_spotify
        mute:
          service: shell_command.spotify_volume
          data_template:
            volume: >-
              {%- if states.media_player.receiver.attributes.volume_level == 0 -%}
              0.5
              {%- else -%}
              0
              {%- endif -%}

Volume set works + mute works. On/Off works. Play works.

I don't get a pause button however and I don't get a seek bar where I see the position + duration.

I have added some extra logging and I think all of them are related to self._state always being on or off. I suppose it needs a paused or playing state for the pause button and seek bar to appear.

As far as I can tell this can happen in
https://github.com/Sennevds/media_player.template/blob/master/custom_components/media_player_template/media_player.py#L478
or
https://github.com/Sennevds/media_player.template/blob/master/custom_components/media_player_template/media_player.py#L770

_update_state never sets anything else than on or off.
I also added some async_update logging statements and this seems never to be called. Not sure when this should be called. I thought for a moment I had to provide the states in the availability_template, but it seems this only expects an on or off value.

Do you have any insights where I could debug further? Or am I missing some config values?

[slyoldfox]

Nevermind, this was due to the value_template returning only on or off - once I changed that to listen to the sensor, everything started to work.