sidebar calendar plugin

[why the lucky stiff]

William Morgan wrote:

>_why, what do you recommend? I could use another layer of SSI, putting
>the calendar contents themselves in separate files---this wouldn't
>eliminate all the file regeneration, but would lessen its cost. Or you
>could add a mechanism for propagating last-modified times up through
>the _erb methods... could get ugly.
>
Well, the calendar shouldn't need to regenerate everytime there's an 
update.  Because creation times don't really change.  If they do, then 
it's probably best to regenerate the whole site, because archive pages 
would have to change as well.

So, if you're storing the calendar in an SSI, make sure that SSI's 
`Page.updated' timestamp is set to the latest creation date among posts 
in that month.  There's a storage.last_created method as well, which 
takes an array of [entry_id, creation_time] (which you'll get back from 
storage.all or storage.find or storage.inpath and so on.)

I'll play with this calendar further and help come up with some ideas.  
I think the ideal route for this plugin would be JavaScript + divs of 
all months in a single SSI.  Provide an archive link (or bag the arrows) 
for people without JS.

_why