[Pmwiki-users] Why groups?

[J. Perkins]

Accidentally hit "reply" instead of "replay to all", sorry.

-------- Original Message --------
Subject: Re: [Pmwiki-users] Why groups?
From: "J. Perkins" <jason at sim8.com>
Date: Thu, June 10, 2004 12:28 pm
To: <chr at home.se>

> While reading some of it, I wondered why we have groups at all... why
> must  we say that a "group can contain subgroups". Couldn't we instead
> talk  about this as a page having subpages? The pages would then be
> organized as  a tree (or many trees).

This is my take exactly, which is why I called them "nested pages"
instead of groups. To remove all ambiguity, here is my implementation of
a "resolver" which can handle every case I have thought of so far.

function Resolve($from, $to)
{
  if ($to[0] == '/')
    return $to;
  if ($to[0] != '.')
    return GetPath($from).$to;
  if (strncmp($to, './', 2)==0)
    return $from.substr($to, 1);

  /* Handle ".." operators */
  while (strncmp($to, '../', 3) == 0) {
    $from = GetPath($from);
    $to = substr($to, 3);
  }

  if ($to == '..')
    return dirname($from)
  else
    return GetPath($from).$to;
}

function GetPath($page)
{
  $path = dirname($page);
  if ($path == '/' || $path == '\\')
    return $path;
  else
    return $path;
}

My current set of tests...

  /HomePage -> [[AnotherPage]] = /AnotherPage
  /HomePage/Child -> [[/AnotherPage]] = /AnotherPage
  /HomePage       -> [[./PmWiki]]     = /HomePage/PmWiki
  /HomePage/Child -> [[..]]           = /HomePage
  /HomePage/Child -> [[../Another]]   = /Another
  /Home/One/Two   -> [[../../]]       = /Home
  /Home           -> [[One/Two]]      = /One/Two
  /HomePage/Child -> [[./Another]]    = /Home/Child/Another

Jason