[PHPiCalendar-DEV] VTODO sorting

[Greg W. <gr...@gr...>]

I just started thinking about sorting the todos, so that high priority
todos show up at the top (and maybe those with pressing due dates), but
am not sure how best to go about it.

I figure that they should be sorted first by priority, but I tend to think
that low priority items should go below those without any priority (is
this sort of thing discussed in the iCalendar standard somewhere?  Could
someone point me in the right direction?).  I think just a basic sort
would put those without values last.  I would then tend to sort things by
due date within any given priority level.  Does that seem reasonable?

Also, I'm not sure about how this sort of sorting would be best
accomplished, technically.  A sort() or ksort() wouldn't work, because the
sort happens many levels above the level of the things being compared.  A
comment on php.net suggested that usort() would be the best thing for this
purpose.  Looking at the usort() documentation, it actually looks like it
should be fairly easy to write a function that does this sort of
nontrivial comparison.

I just wanted to see if anyone had any thoughts on this before I just went
ahead with it.

Greg

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