Room card: Number of lights on/covers up/ ... in area without using sensors

[timvdsm]

Hi,
I'm trying to build a new roomcard using bubble cards where I show the lights on / covers open / covers closed per room.

I don't have separate sensors for all of them per room (as there are a lot of rooms :-)).
I just calculate it very easy using the commands below, which gives nicely all the current states.

Lights on:
expand(area_entities('kitchen')) | selectattr ( 'domain' , 'eq' , 'light' ) | selectattr ( 'state' , 'eq' , 'on' ) | list | count
--> this gives the number of lights on in the kitchen

Cover open:
expand(area_entities('livingroom')) | selectattr ( 'domain' , 'eq' , 'cover' ) | selectattr ( 'state' , 'eq' , 'open' ) | list | count
--> this gives the number of covers open in the livingroom

Covers closed:
expand(area_entities('sleeproom')) | selectattr ( 'domain' , 'eq' , 'cover' ) | selectattr ( 'state' , 'eq' , 'closed' ) | list | count
--> this gives the number of covers closed in the sleeproom

Otherwise I would have to create around 50 separate sensors for it.

Is there any way I can use these 3 commands as the states for subbuttons?
At this moment I guess I only can use templates for sensors in subbuttons?