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<?php // -*-php-*-
rcs_id('$Id: WantedPagesIter.php,v 1.3 2007/05/24 18:39:17 rurban Exp $');
//require_once('lib/WikiDB/backend.php');
/**
* This iterator will work with any WikiDB_backend
* which has a working get_links(,'links_from') method.
*
* This is mostly here for testing, 'cause it's slow,slow,slow.
*/
class WikiDB_backend_dumb_WantedPagesIter
extends WikiDB_backend_iterator
{
function WikiDB_backend_dumb_WantedPagesIter(&$backend, &$all_pages, $exclude='', $sortby='', $limit='') {
$this->_allpages = $all_pages;
$this->_allpages_array = $all_pages->asArray();
$this->_backend = &$backend;
if (!is_array($exclude))
$this->exclude = $exclude ? PageList::explodePageList($exclude) : array();
else
$this->exclude = $exclude;
$this->sortby = $sortby; // ignored
if ($limit) { // extract from,count from limit
list($this->from, $this->limit) = $backend->limit($limit);
} else {
$this->limit = 0;
$this->from = 0;
}
$this->pos = 0;
$this->pagelinks = array();
}
function next() {
while ($page = $this->_allpages->next()) {
while ($this->pagelinks) { // deferred return
return array_pop($this->pagelinks);
}
$this->pagelinks = array();
if ($this->limit and $this->pos > $this->limit) break;
$pagename = $page['pagename'];
$links = $this->_backend->get_links($pagename, false);
while ($link = $links->next()) {
if ($this->limit and $this->pos > $this->limit) break;
if ($this->exclude and in_array($link['pagename'], $this->exclude)) continue;
// better membership for a pageiterator?
if (! in_array($link['pagename'], $this->_allpages_array)) {
if ($this->from and $this->pos < $this->from) continue;
// collect all links per page and return them deferred
$link['wantedfrom'] = $pagename;
$this->pagelinks[] = $link;
$this->pos++;
}
}
$links->free();
unset($links);
if ($this->pagelinks) return array_pop($this->pagelinks);
}
return false;
}
function free() {
unset($this->_allpages_array);
$this->_allpages->free();
unset($this->_allpages);
unset($this->_backend);
}
}
// For emacs users
// 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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