Apply publish_retain to raw MQTT topics (ssnc)

[tricksel]

Feature request: apply publish_retain to raw MQTT topics (ssnc) + accurate track duration

Current behaviour

When publish_retain = "yes" is set in the MQTT configuration, the retain flag is applied to parsed topics (title, artist, album, cover, etc.), but not to raw ssnc topics such as ssnc/prgr.

Desired behaviour

publish_retain should also apply to ssnc/prgr (and ideally all ssnc topics), so that the broker stores the last known value and delivers it immediately to new subscribers.

Use case

I'm building a "Now Playing" display page (HTML/JS) that subscribes to MQTT and shows track info, album art and a playback progress bar. The ssnc/prgr topic provides exactly what I need: start, current and end RTP timestamps, from which I can calculate both elapsed time and total duration.

Because ssnc/prgr is not retained, a page refresh mid-track results in no progress information until the next track starts. Retaining ssnc/prgr would solve this completely.

[mikebrady]

Thanks for the suggestion. We can't promise anything soon, I'm afraid, but we'll put it on the list.