Logitech Harmony Integration with @iandday's component

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Now that the Harmony code has been merged into the HASS code for the next release I wanted to add an alternative to @BTallack 's great instruction on how to incorporate the Harmony hub into your HASS setup that involves the template feature. It results in less lines of code but isnt as extensible as BTallack’s method

the following script can replace the section of scripts to activate each activity

script:
  input_select_harmony
    alias: "Start activity from input select"
    sequence:
      - service: remote.turn_on
        data_template:
          entity_id: remote.living_room_tv
          activity: >
            {% if is_state("input_select.living_room_tv", "PowerOff") %}
                -1
            {% elif is_state("input_select.living_room_tv", "Xbox") %}
                20195208
            {% elif is_state("input_select.living_room_tv", "Playstation 3") %}
                19954855
            {% elif is_state("input_select.living_room_tv", "Steam Link") %}
                16602559
            {% elif is_state("input_select.living_room_tv", "Plex Media Player") %}
                19575995           
            {% elif is_state("input_select.living_room_tv", "Airplay") %}
                19292022
            {% elif is_state("input_select.living_room_tv", "Wii U") %}
                13677570                
            {% endif %}

The following automation will update the input select when the activity is changed using the harmony remote or other device

- alias: 'Remote external update living room'
  trigger:
    platform: state
    entity_id: remote.living_room_tv
  action:
    service: input_select.select_option
    data_template:
      entity_id: input_select.living_room_tv
      option: >
        {{ states.remote.living_room_tv.attributes.current_activity }}

The last automation will start an activity once it’s selected from the input select in the frontend

- alias: 'Remote start activity from input select living room tv'
  trigger:
    platform: state
    entity_id: input_select.living_room_tv
  action:
    service: script.turn_on
    entity_id: script.input_select_harmony
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