Add blink pattern to blink

[mwohlert]

Since we are using balena with multiple containers, which need to signal the status via the LEDs, we thought it might be helpful to implement a generalised endpoint(s) in the supervisor that allows these containers to schedule blink patterns with priority.

My question to you guys is basically: Would you be interested in this?

My current Idea:

Extend the /v1/blink to also accept a optional json body which features: { "status": { "on": 100, "off": 100}, "power": {"on":100, "off":100}, "timeout" : 5000, "priority": 1 }

The Post request to /v1/blink would also return a uuid of this pattern entry to allow stopping it before the timeout is reached via a DELETE of /v1/blink.

[CameronDiver]

@mwohlert interesting idea! Basically as long as these are completely optional features, and the current implementation works as-is, I'd be very happy with it. That being said, I don't think it would be something that I would get time to work on personally but I'd be more than happy to provide any pointers that may be required.

[Page-]

Fwiw the blinking module already supports customisable patterns via https://github.com/balena-io/blinking/blob/59ca68f6e3445429fd72e3acd0482ea7850081ac/index.coffee#L33-L37

fullPattern =
    blinks: pattern.blinks ? 1
    onDuration: pattern.onDuration ? 200
    offDuration: pattern.offDuration ? 200
    pause: pattern.pause ? 0

so it should be straightforward enough to just pass the args through to that

[mwohlert]

@Page- Thanks. I've been already using that in one container, but due to app updates I wanted to have that functionality in the supervisor since it is always running and does not face interruption at any point.

@CameronDiver I'll start developing on this. I'll keep this completely optional. Just wanted to check if this would be ok with you guys, so I don't waste my time.

[mwohlert]

I'll orient the json body on the blinking library.

[Page-]

@mwohlert yeah that's what I meant - it's the library the supervisor uses already so it should be possible to map the endpoint body 1-1