Additional events for --onevent argument

[RealOrangeOne]

The onevent API is very useful to generate additional UI ontop of librespot, without having to re-implement most of the CLI, however it's missing many events which could be useful.

• Device connection / disconnection
• Differing pause and stop events
• Play time (although this may not be possible with Spotify's API)

Looking through the runtime logs, there's lots of output from librespot_connect::spirc. Potentially these events could be channelled into the existing PlayerEvent flow. I feel it's better to have too many events, that the user can filter out, than too few, and I have to parse the stdout of the process (something I was partially tempted to do).

If someone could point me to the best location to put the call to run_program, I'd be happy to contribute the code myself!

[michaelherger]

Seems to be under investigation. See eg. ashthespy@545c9ea

[RealOrangeOne]

ooh, awesome! I hope to see that merged at some point 👍

[sashahilton00]

Thanks for getting started on this, my plan is to add events from SpIRC as well. As you said, having too many is better, as we'll eventually send them out as JSON in librespotd

[ashthespy]

Gimme a few days, will clean this up and submit a PR for a proper review :-)

I'm aiming to incorporate the events @sashahilton00 mentions at plietar/librespot#37 (comment)