Weird behavior on the "Weather comparison" page

[izackwu]

First of all, thanks for making Strautomator! It's been working so well and reliably for me!

Recently, when trying to change the weather info provider, I used the Weather comparison page and found some weird behavior - it incorrectly thought it was night when it was 3PM in my time zone and it was sunny outside:

I'm completely new to the codebase, but after some digging and with help from AI tools, I suspect there's something wrong with the time zone offset calculation.

AI claims that (sorry but I know nothing about JS and can't fact check it):

The Bug: Inverted Timezone Sign

The issue is a mismatch between how the browser calculates the timezone offset and how the server-side library (dayjs) expects it.

• Frontend (pages/weather/select.vue): You are using new Date().getTimezoneOffset(). In JavaScript, this returns the difference in minutes between UTC and Local Time.
  • Crucially: It returns a positive value for timezones behind UTC (e.g., New York is UTC-5, but returns 300) and a negative value for timezones ahead of UTC (e.g., Sydney is UTC+11, but returns -660).
• Backend (src/routes/api/weather.ts): The API route receives this value and passes it to dayjs().utcOffset():
  • dayjs (following ISO 8601) expects the opposite: negative for West (UTC-5 should be -300) and positive for East (UTC+11 should be 660).

As a sanity check, I manually flipped the offset from -660 to 660 and resent the API request, and the response looked much more reasonable (at least no 🌙 s).

Apologies if AI hallucinated and misled me. Thanks again for maintaining Stautomator :)

[igoramadas]

Hi Zack! To be completely honest I haven't revisited the weather preview page for a while now. Could you please open https://strautomator.com/weather/select again and let me know what coordinates and timezone offset you see listed there (right above the results table)?

I'll troubleshoot it sometime this week.

[izackwu]

Hi Igor! Was it a recent change that the page listed coordinates and timezone offset, as I didn't notice such information when making the issue?

1. It's a bit strange, but depending on how I open the page, it's sometimes Coordinates -33.8 - 151.2, timezone offset 660min (for example, when I click into the page from settings), while sometimes Coordinates -33.8 - 151.2, timezone offset 0min (for example, after reloading the page). Note that I truncated and added some small offset to the actual coordinates for privacy.
2. But surprisingly, the page seems to be working correctly for me now - I tried it several times in the day, and at least it didn't claim it was night anymore. Maybe you've already made some changes?

Anyway, thanks for your time, and please let me know if there's any information I can provide.