Templating in custom labels

[rklueber]

Before I throw in a suggestion, please let me thank you for creating this. This is awesome. The channel back from HA to SD was missing so far and you closed that gap. Thank you.

I like the possibility to feed back values from HA onto the SD keyboard.

May I suggest adding full templating possibilities. Think of showing the volume for a media_player with
{{volume_level}} showing a value between 0 and one like 0.38. Can we improve that ideally with making use of the templating engine which exists in HA.

Think of {{ (state_attr('media_player.ralf', 'volume_level') * 10) | round(0) * 10 }} . Possibilities would be endless.

[cgiesche]

I love your idea. Currently, i use handlebars as templating engine, which is very basic and clean but lacks some features that would be very useful in context of this project.

I will take a look at https://github.com/sstur/jinja-js, which is a javascript implementation of the templating engine that home-assistant uses.

An architectural challenge is, that (currently) in context of a button, i only have access to the state of a single entity. I think combining the states of different entities would be great, too, but would require a rework of big portions of the code.

I will create two issues:

1. Replace handlebars by jinja-js to be able to do calculations etc. in templates (may happen soon)
2. Redesign internal state architecture to be able to access cross-entity-states inside templates (may take some time ;) )

[cgiesche]

(Spoiler) Replacing handlebars by jinja looks promising: