[Catalyst] User timezones

[Devin Austin]

On Thu, Jun 25, 2009 at 1:54 AM, Christian Lackas <christian at lackas.net>wro=
te:

> * Devin Austin <devin.austin at gmail.com> [090625 09:43]:
>
> Hi Devin,
>
> > I would approach it so that when the user registers, they choose their
> time
> > zone. When they login, this information is stored into their session, a=
nd
> > retrieved whenever.
>
> agreed.
>
> > I would store it in the session in the form you want it to be
> > presented, which would save you whatever time it would take to be
> > inflating it.
>
> Now the problem begins:
> I have tables for studies, series and images (and many more), each of
> them has multiple timestamps (e.g. when the study was created, the
> series acquired, the image processed, and when everything was created
> and deleted).
> So when I access all these times, I would have to convert all of them,
> e.g. in a template
>
>    [% study.time.convertTZ(c.user) %]
>    [% series.time.convertTZ(c.user) %]
>
> rather than just use (after Catalyst knows about the users timezone,
> somehow).
>
>    [% study.time %]
>    [% series.time %]
>
> and I must not miss a single value. And things get even more complicated
> when I filter for times (e.g. show images created in the last 3 hours),
> or if I want to show only datasets whose deletion date is in the past
> (could have be deleted in Europe and should also be gone in the US).
>
> I do know how to do all these things manually one by one, however, I
> already foresee that I will miss TZ conversions somewhere or
> accidentally do it twice in wrong direction, or ...
>
> I also know how to use inflation/deflation to a DateTime, which allows
> me to specify ONE timezone in the Model, however, how do I change the
> timezone on a per-user basis.
>
> Christian
>
> --
> http://www.invicro.com/
>
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Hi Christian,

Now the problem begins:
> I have tables for studies, series and images (and many more), each of
> them has multiple timestamps (e.g. when the study was created, the
> series acquired, the image processed, and when everything was created
> and deleted).
> So when I access all these times, I would have to convert all of them,
> e.g. in a template


There we go, that's better :-)

Check this out:
http://search.cpan.org/~dkamholz/Catalyst-Plugin-Session-PerUser-0.03/lib/C=
atalyst/Plugin/Session/PerUser.pm

That should allow you to stuff things into your session *per user*.  I know
this doesn't exactly help with converting each timestamp, but it's a start.

I mean, you're going to have to retrieve each record per user anyway, why
not retrieve, convert, and stuff it into the per-user session?

-- =

Devin Austin
http://www.codedright.net
http://www.dreamhost.com/r.cgi?326568/hosting.html - Host with DreamHost!
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