[pmwiki-devel] UpdatePage() and warnings

[Patrick R. Michaud]

On Tue, Nov 07, 2006 at 07:33:38PM +0100, Petko Yotov wrote:
> > > CopyPageText( 'Main.HomePage', 'Main.WikiSandbox');
> >
> > When is this function being called?  It looks to me as
> > though it's being called prior to any of the markup rules
> > being loaded (and UpdatePage() really wants to occur
> > after the markup rules are loaded).
> 
> I would like to call it once per day. I have a list of pages to be checked and 
> moved into a sort of "Inbox", if their content is outdated. So, there is a 
> file "$WorkDir/.textcopied" that is touched after the function call:
> 
> (simplified)
> 
> $stamp = intval(@filemtime("$WorkDir/.textcopied"));
> $now = time();
> if($now - $stamp > 60*60*24)
> {
> 	foreach($MyListOfPages as $mypage)
> 	{
> 		CopyPageText($mypage, 'Main.INBOX');
> 	}
> 	touch("$WorkDir/.textcopied");
> }
> 
> That is in a cookbook-type file called from config.php.
> 
> So, how can I postpone the UpdatePage()  call after the  markup rules are 
> loaded?

I'd do it using register_shutdown_function, as follows:

    $TextCopied = "$WorkDir/.textcopied";
    $stamp = @filemtime($TextCopied);
    $now = time();
    if ($now - $stamp > 60*60*24) 
      register_shutdown_function('CopyListOfPages', getcwd());

    function CopyListOfPages($dir = NULL) {
      global $MyListOfPages, $TextCopied;
      if ($dir) { flush(); chdir($dir); }

      Lock(2);
      foreach((array)$MyListOfPages as $mypage)
	CopyPageText($mypage, 'Main.INBOX');
      touch($TextCopied);
    }

Note that in both versions (i.e., both with and without
register_shutdown_function), it's possible that two
or more nearly simultaneous requests can cause the
Main.INBOX page to be updated multiple times.  I don't
know if that's a critical issue for you.

Pm