Example sleep tracker doesn't work for sleep times before and after 00:00 (midnight) about obsidian-tracker HOT 1 OPEN

I encountered the same problem today. I was wondering if I should try to go to bed before midnight to make tracking easier. 😆 /j

TL;DR You could do one of:

1. write your sleep times as something like -00:30 if before midnight, or
2. create an auto-updated property field using another plugin which converts your sleep time into the above format.

What I realized was that using values like -01:30 made the chart render the way I wanted. If you're okay with using that notation in your notes, then it could be the way to go.

What I actually ended up doing involved another plugin called Metadata Menu. Using it, I set up an auto-updated property field in the frontmatter which converted my inputs into a format like [-00:30, 07:30] with the values representing the time differences from the midnight of the day for that note. I had to do this because I've been recording my times in the full datetime format. In case it helps anyone, below is the code snippet I used for the property's formula.

// My input fields are something like:
// [go-to-bed:: 2024-01-30T00:30]
// [wake-up:: 2024-01-30T07:30]
(() => {
const goToBed = current["go-to-bed"];
const wakeUp = current["wake-up"];
if (!goToBed || !wakeUp) return "";
const midnight = current.file.day;
const sleepTime = goToBed < midnight
  ? midnight.diff(goToBed).toFormat("-hh:mm")
  : goToBed.diff(midnight).toFormat("hh:mm");
const wakeUpTime = wakeUp.diff(midnight).toFormat("hh:mm");
return `[${sleepTime}, ${wakeUpTime}]`;
})()

If you're just recording times in formats like 23:00, then you just need to convert the sleep time and use the original field for the wake-up time. If you're using Metadata Menu, the formula would be something like below. (Disclaimer: I haven't tested the code)

// Let's say you have the field as:
// sleep:: 23:30/07:30
(() => {
const sleep = current.sleep?.split("/");
if (!sleep?.length) return "";
const sleepTime = dv.luxon.Duration.fromISOTime(sleep[0]);
// No change if before 12:00 (adjust as needed)
return sleepTime.hours < 12 ? sleep[0] : dv.luxon.Duration.fromObject({ hours: 24 }).minus(sleepTime).toFormat("-hh:mm");
})()

Then, you could use the new field in the tracker code block.

IIRC, a plugin called MetaEdit also allows you to create an auto-updated property field. I haven't used it yet, so I'm not sure how to get that working for this.

I hope this helps anyone reading this!

from obsidian-tracker.