Add remaining cook time to vesync

[cdnninja]

Proposed change

Add remaining cook time to vesync.

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[home-assistant]

Hey there @markperdue, @webdjoe, @TheGardenMonkey, @iprak, @SapuSeven, mind taking a look at this pull request as it has been labeled with an integration (vesync) you are listed as a code owner for? Thanks!

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[cdnninja]

This is pending #160573

[joostlek]

To double check -> Can you pause the device?

[cdnninja]

When paused cook time remaining will revert to 0. https://github.com/webdjoe/pyvesync/blob/2f2511f27acc8162722f2bf2eee5e74134d07cdd/src/pyvesync/devices/vesynckitchen.py#L182-L184 cooking goes to "cookStop"

[joostlek]

Oh! Then should we make this a timestamp entity? As timestamps are always accurate. Then we can make the cook time go to either unknown or unavailable when paused for example

[cdnninja]

We could calculate a rough timestamp. The API doesn't give one, we know the minutes remaining and the time we called the API. Right now by showing as a value in minutes and updating every 30 seconds we have a rough precision. I would think we could use a timestamp rounded to nearest minute though. Thoughts?

[joostlek]

Yea that sounds cool! Please check Homewizard and starlink, who both have a way to ignore variance for the uptime entity

[github-actions]

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