Do we have event handling in Liquidsoap?

[Moonbase59]

For autocue, I’m thinking of something that could "fire an event" when cue_file is finished with a track, and pass on some metadata.

So a third-party script could use something like radio.on_cue_file maybe, to pick up changed metadata and update their database. Like AzuraCast, for instance.

Is that possible with what we have (i.e. LS 2.2.5)?

[toots]

We have event-based APIs but there is no generic event API available at the moment, no.

[Moonbase59]

Hm. So if I wanted AzuraCast to be able to pick up calculated Autocue values for its database, I’d have to put in something App-specific into otherwise "pure" Liquidsoap code. Not so elegant…

I had somehow hoped for user-generated events… ;-)

[toots]

It's not hard to add but for large features like that it's good to think a little more about the general picture:

• What would be the use-cases it would solve that can definitely not be solved conveniently at the moment
• What can we do with the type system to make it robust, typically exposing the set of events any given value can send or receive
• Will that impact performances, memory and CPU usage