DateHelper DateTime Support

[maennchen]

Partial Implementation of #69

TODO: How to fix the comments? Incrementing / Decrementing Seconds will not work properly.

[shaolang]

Is there any particular reason why using :day, :hour, :minute, etc as the unit isn't considered?

[maennchen]

@shaolang I honestly don't remember why thing are how they are. I stopped looking at this years ago and can't quite remember why.

You're welcome to pick this back up and look at the details.

One thing to be very careful of is that it behaves correct both around leap seconds and time zone changes. (summer / winter time etc.)

[coveralls]

coverage: 96.257% (-0.5%) from 96.736%
when pulling 9fb0fba on date_helper_datetime_support
into 9122b11 on main.

[maennchen]

Is there any particular reason why using :day, :hour, :minute, etc as the unit isn't considered?

@shaolang Yes: the units were not yet supported back in 2020. This is a newer feature from Elixir 1.14.

Given that, it should probably be easier to implement this.

[shaolang]

Is there any particular reason why using :day, :hour, :minute, etc as the unit isn't considered?

@shaolang Yes: the units were not yet supported back in 2020. This is a newer feature from Elixir 1.14.

Given that, it should probably be easier to implement this.

ah... that explains it.

LOL... sorry, I couldn't help in doing this in the past 2 weeks 'cos work commits. I'll see what else I can help on.

[maennchen]

Closed in favor of #129