[pmwiki-users] categories in pagelist

[J. Meijer]

> Date: Mon, 2 Apr 2007 12:29:23 -0500> Subject: Re: [pmwiki-users] categories in pagelist> > On Mon, Apr 02, 2007 at 04:35:38PM +0000, J. Meijer wrote:> >    On 4/1/07, Petko Yotov <5ko at free.fr> wrote:> >      Currently we can not search for more than one page in the "link="> >      parameter,> >      so in the third example "link=Cat1,Cat2" is just ignored. It would be> >      really> >      nice though, Patrick, if that became possible (also with> >      negatives "link=Cat1,-Cat2").> > Just checking...  do you want "link=Cat1,Cat2" to mean "all pages with > links to either Cat1 or Cat2" or "all pages with links to both Cat1 and Cat2"?> > >    Petko, you can have multiple links matched in pagelists, if you're willing> >    to patch function PageListTermsTargets() in pagelist.php:> >    [...]> >          if (@$opt['link']) { #!# JM-mod> >            if(!is_array($opt['link']))> >              $opt['link']=explode(',',$opt['link']);> >            $link=array();> >            foreach($opt['link'] as $l) {> >              $link[] = MakePageName($pn, $l);> >              $indexterms[] = " $l ";> >            }> >            $opt['=linkp'][] = "/(^|,)".implode('|',$link)."(,|$)/i";> >          }> > > >    I believe this can be turned into a recipy after recent pagelist.php> >    refactorings.> > The above code won't work, as $opt['=linkp'] cannot be an array.> Putting it as an array causes lots of "preg_match() expects parameter 1> to be a string" errors from PHP.> That's correct, I forgot the second patch (it wasn't as clearly marked!):    case PAGELIST_ITEM:      if (!$page) { $page = ReadPage($pn, READPAGE_CURRENT); $opt['=readc']++; }      if (!$page) return 0;## changed section:      if (@$opt['=linkp']) {         foreach($opt['=linkp'] as $l)           if(preg_match($l, @$page['targets'])) { $l=0; break; }        if($l) { # no link matched          $opt['=reindex'][] = $pn; return 0; }      }> Removing the [] from the last line somewhat works -- but the code> above displays only those pages with links to both Cat1 and Cat2 to be > displayed.  See the example using the above code (after fixing the [] error) > at:> >     http://www.pmichaud.com/sandbox/multilink/pmwiki.php?n=Main.HomePage> > So, if the intent is to find pages that are in all of the link= targets> (i.e., the intersection and not the union), then the above will probably> work for that.  However, I know a lot of people will expect or want> "link=Cat1,Cat2" to display pages having either Cat1 or Cat2 as targets.> > > >    I hope no recipy is need, but that this instead gets included into pmwiki.> > I'm planning to include this capability at some point, but I also want> to be able to handle negatives and wildcards.  There's also the issue> that it needs to remain somewhat quick, which requires refactoring> the pageindex a bit (which is why the patch proposed above gives the> intersection instead of the union).The link intersection is the highly desired capability needed to give me virtual hierarchy capability using categories. I was doing some experiments here. I think that instead of the link=+xx and link=-yyy syntax there is the option to have this:  ## get a pages with xxx AND yyy (as I did implement):  (:pagelist link=xxx,yyy:)  ## get pages with xxx OR yyy:
  (:pagelist link=xxx link=yyy:)  ## get pages with xxx OR both yyy and zzz


  (:pagelist link=xxx link=yyy,zzz:)


Don't know how this'll conflict with user expectations, but I find it quite acceptable. Maybe you'd like interchange the and & or semantics. /jm> > Pm> ps On the topic of semantics Pm wrote> I think this is inconsistent with the other filters -- consider    1.  group=PmWiki,Site    2.  name=Test*,XYZ*    3.  $:Status=open,closed,pending> We expect these to mean    1.  pages in either the PmWiki or Site groups    2.  pages that begin with either "Test" or "XYZ"    3.  pages with $:Status of open, closed, or pending> Thus, to be consistent with the above, I would think that "link=Cat1,Cat2"> should mean "pages with links to either Cat1 or Cat2".It is this way because a group *can't* be 2 groups at a time. Likewise Name, likewise $:Status. But a page can easily have several backlinks (meaning "on a certain domain"). I believe that is the real application here. Those seeking this capability have expectancies that *may* differ from the suggestion arising from the above presentation.. ---I haven't thought any of the combinations through. It certainly will be yet another key capability to have. Thanks!
_________________________________________________________________
It’s tax season, make sure to follow these few simple tips 
http://articles.moneycentral.msn.com/Taxes/PreparationTips/PreparationTips.aspx?icid=WLMartagline
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/pmwiki-users/attachments/20070402/f2a8abff/attachment-0001.html