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<?php // -*-php-*-
rcs_id('$Id: AllRevisionsIter.php,v 1.2 2004/04/26 20:44:35 rurban Exp $');
/**
* An iterator which returns all revisions of page.
*
* This iterator uses only the WikiDB_backend::get_versiondata interface
* of a WikiDB_backend, and so it should work with all backends.
*/
class WikiDB_backend_dumb_AllRevisionsIter
extends WikiDB_backend_iterator
{
/**
* Constructor.
*
* @access protected
* @param $backend object A WikiDB_backend.
* @param $pagename string Page whose revisions to get.
*/
function WikiDB_backend_dumb_AllRevisionsIter(&$backend, $pagename) {
$this->_backend = &$backend;
$this->_pagename = $pagename;
$this->_lastversion = -1;
}
/**
* Get next revision in sequence.
*
* @see WikiDB_backend_iterator_next;
*/
function next () {
$backend = &$this->_backend;
$pagename = &$this->_pagename;
$version = &$this->_lastversion;
//$backend->lock();
if ($this->_lastversion == -1)
$version = $backend->get_latest_version($pagename);
elseif ($this->_lastversion > 0)
$version = $backend->get_previous_version($pagename, $version);
if ($version)
$vdata = $backend->get_versiondata($pagename, $version);
//$backend->unlock();
if ($version == 0)
return false;
$rev = array('versiondata' => $vdata,
'pagename' => $pagename,
'version' => $version);
if (!empty($vdata['%pagedata']))
$rev['pagedata'] = &$vdata['%pagedata'];
return $rev;
}
};
// (c-file-style: "gnu")
// Local Variables:
// mode: php
// tab-width: 8
// c-basic-offset: 4
// c-hanging-comment-ender-p: nil
// indent-tabs-mode: nil
// End:
?>
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