Latte: added support for DateInterval in date helper

[voda]

Is needed for TIME columns in MySQL after commit 36f3c33.

[xificurk]

You need to use format method and actually respect the passed format argument

[dg]

What about for example DateInterval('PT30H10M10S')?

[voda]

Not sure, I don't like the DateInterval::format method, because it has another different syntax than currently supported DateTime::format and strftime. I use MySQL TIME column only for time of the day so this is good enough for me, but i can change it if anyone has a better proposal.

[voda]

Changed it to DateInterval::format. Better now? If someone doesn't like the syntax, it is easy to make a custom helper.

[xificurk]

As I look at it now, I think this should be separate helper ('time'?). It's not a good idea to mix DateInterval with DataTime, e.g. what would you expect to get from Helpers::date(new DateInterval('PT30H10M10S'))?

[voda]

I don't think a separate helper is a good idea. What would be the difference between them? Maybe only in default format, but that could be implemented into the date helper as well.
I have no real use case for printing an interval like 'PT30H10M10S', only something like 30 hours ago.