SimpleWeatherService: Add sunrise and sunset data

[vkareh]

This receives sunrise and sunset data from the weather service and adapts weather icons to represent the correct time of day (sun or moon).

It requires a new version of the weather service data byte array.

• Companion patch to Gadgetbridge: https://codeberg.org/Freeyourgadget/Gadgetbridge/pulls/4011
• Companion patch to InfiniSim: SimpleWeatherService: Add sunrise and sunset data InfiniSim#152

[github-actions]

Build size and comparison to main:

Section	Size	Difference
text	374836B	604B
data	948B	0B
bss	63496B	16B

[NeroBurner]

Woult it be enough to have the sunset and sunrise in minutes resolution. If so we could define the sunset sunrise timestamps to be in minutes since midnight. Then we only need log2(24*60)=10.5 bits. So we could only introduce two 16 bit uints instead of two 64bit numbers. Saving 96 bits of memory per message

What do you think?

[vkareh]

I like this idea. A quick/naïve implementation would be to truncate the timestamp that Gadgetbridge sends, and we pad it when calculating the actual time, but then the resolution becomes arbitrary.

What you're suggesting instead is Gadgetbridge essentially doing something like

-long sunriseLocal = weatherSpec.sunRise + Calendar.getOffset("UTC").getTimeInMillis()) / 1000L;
+int sunriseLocal = (weatherSpec.sunRise + Calendar.getOffset("UTC").getTimeInMillis()) / 1000L) / 60;

(or whatever the type conversion looks like)

I'll give that a try and see what happens.

[vkareh]

Ah, nevermind - I see what you're suggesting. Diving the timestamp doesn't really change the size. Math is hard 🤦